A closed-loop thermosiphon system for recovering waste heat and improving performance of condensation heating systems

Abstract

A closed-loop thermosiphon system for recovering waste heat and improving performance of an appliance is disclosed. The closed-loop thermosiphon system is used for recovering waste heat of at least one of a heating unit, a washing machine, a dish washer, a sink pipeline, a bathroom pipeline, an absorption chiller, public buildings, natural heat of earth, and sea / ocean water. The heating unit includes one heater, a first heat-transfer fluid, and one two-walled gas outlet. The two-walled gas outlet forms a passway for entering fresh air. The closed-loop thermosiphon system includes a first coil placed within the inlet pipeline dipped within the first heat-transfer fluid, and a second coil encircled the inner wall. The closed-loop thermosiphon system is used to decrease temperature of the first-heat transfer fluid for enhanced waste heat absorption in the heating unit.

Description

A CLOSED-LOOP THERMOSIPHON SYSTEM FOR RECOVERING WASTE HEAT AND IMPROVING PERFORMANCE OF CONDENSATION HEATING SYSTEMSTECHNICAL FIELD

[0001] The present disclosure generally relates to a device for recovering waste heat, and more particularly, relates to a device for improving performance and efficiency of condensation heating systems by decreasing temperature of a returned heat-transferring fluid for a better condensation.BACKGROUND ART

[0002] A significant and alarming amount of energy is wasted globally. Whether it's due to inefficient appliances, outdated technology, or simply human negligence, a substantial portion of the energy generated remains unused. This wastage not only poses a threat to our planet's dwindling energy resources but also contributes to environmental issues such as increased carbon emissions. The sheer scale of this energy wastage highlights the urgent need for innovative solutions to harness and utilize these untapped resources effectively.

[0003] One prominent source of wasted energy is the heat produced by various devices, particularly heating systems that operate in buildings. Many homes and commercial spaces have heating systems that generate excess heat even when the ambient temperature is already comfortable. This surplus heat not only represents a squandered energy resource but also adds an unnecessary load to cooling systems in warmer climates. The inefficiencies in managing heat energy contribute to both increased energy bills for consumers and a heightened environmental impact, underscoring the importance of addressing this issue through sustainable and technologically advanced solutions.

[0004] Efforts to capture and repurpose waste heat energy have seen a surge in innovation and development. One promising approach involves the utilization of advanced technologies like thermoelectric generators, which convert heat into electricity. Additionally, smart building systems are being designed to optimize energy usage, automatically adjusting heating and cooling systems based on occupancy and ambient conditions. Furthermore, research is ongoing into more efficient insulation materials that can retain and redistribute heat effectively. These multifaceted efforts aim to not only reduce energy wastage but also contribute to a more sustainable and environmentally conscious approach to energy consumption.

[0005] There are many systems developed for the purpose of harvesting waste heat energy. For example, Barger Eric et al. presented a patent on “System, method and computer program product for energy allocation” (US20150152810A1). Barger Eric et al. introduced a method, system, and technique for energy allocation. The system consists of a fdtration system designed to fdter waste vegetable oil produced by a facility. It also incorporates an engine fueled with the fdtered vegetable oil and a generator operated by the engine to supply alternating current (AC) power. Additionally, the system is configured such that exhaust heat produced by the engine is harnessed and allocated to the facility as an energy source. While the system for energy allocation from waste vegetable oil presents sustainability benefits, several drawbacks should be considered. Drawbacks include complexity and maintenance requirements due to filtration, engine operation, and generator functionality. Additionally, the system's reliance on a consistent supply of waste vegetable oil may pose challenges, as variations in availability or quality could impact reliability. Emission concerns also arise, as combustion processes in the engine may produce emissions despite using waste oil. Energy conversion efficiency may be compromised due to multiple conversion steps, potentially reducing overall efficiency. Furthermore, space and infrastructure requirements, compatibility and integration challenges, and resource competition should be addressed for effective implementation on a larger scale. Gerald Alvin Radke et al. presented a patent on “Systems and methods for the capture of heat energy, long-distance conveyance, storage, and distribution of the captured-heat energy and power generated therefrom” (AU2021204463C1). Gerald Alvin Radke et al. described a system for long-distance heat energy capture, conveyance, and delivery, yet acknowledged potential complexities and energy losses inherent in a closed-loop design. This highlights the necessity for thorough evaluation and optimization to determine the practicality and costeffectiveness of implementing the technology on a larger scale. The inventive long-distance closed-loop heat energy capture system, while offering potential benefits, presents several drawbacks. Reliance on a continuous circulation of Low-Boiling-Point (LBP) liquid in each closed-loop module may result in energy losses during the conversion process between liquid and gas phases, diminishing overall efficiency. Furthermore, the complexity of maintaining and ensuring the reliability of a three-module closed-loop system, coupled with the uncertainties surrounding the practicality and cost-effectiveness of implementing such an intricate design on an extensive scale, poses significant challenges to the widespread adoption of this technology.

[0006] There is, therefore, a need for an environmentally conscious and cost-effective system to optimize heat recovery, ensuring the efficient utilization of waste heat energy and minimizing the environmental impact of energy consumption. There is further a need for a system to improve efficiency of heating devices for minimizing heat waste.SUMMARY OF THE DISCLOSURE

[0007] This summary is intended to provide an overview of the subject matter of this patent, and is not intended to identify essential elements or key elements of the subject matter, nor is it intended to be used to determine the scope of the claimed implementations. The proper scope of this invention may be ascertained from the claims set forth below in view of the detailed description below and the drawings.

[0008] According to one or more exemplary embodiments, the present disclosure is directed to a waste heat recovery heating system. In an exemplary embodiment, an exemplary waste heat recovery heating system may include a heating unit and a closed-loop thermosiphon system. In an exemplary embodiment, an exemplary heating unit may include one heater, one inlet pipeline may be connected to an exemplary heater, one outlet pipeline may be connected to an exemplary heater, and one two-walled gas outlet may be connected to an exemplary heater. In an exemplary embodiment, an exemplary inlet pipeline may allow passage of a first heattransfer fluid there within toward an exemplary heater. In an exemplary embodiment, an exemplary outlet pipeline may allow a heated first heat-transfer fluid to exit an exemplary heater. In an exemplary embodiment, an exemplary two-walled gas outlet may include one inner wall and one outer wall. In an exemplary embodiment, an exemplary inner wall may form a first passway for existing burnt gases from an exemplary heater. In an exemplary embodiment, a space between an exemplary inner wall and an exemplary outer wall may form a second passway for entering fresh air into an exemplary heater. In an exemplary embodiment, an exemplary inner wall may be housed within an exemplary outer wall. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may be used for decreasing temperature of an exemplary first heat-transfer fluid within an exemplary inlet pipeline. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may include a first tubular coil, a second tubular coil, one supply pipeline, one recycling pipeline, and a second heat-transfer fluid. In an exemplary embodiment, an exemplary first tubular coil placed within an exemplary inlet pipeline. In an exemplary embodiment, an exemplary first tubular coil maybe dipped within an exemplary first heat-transfer fluid. In an exemplary embodiment, an exemplary second tubular coil may encircle an exemplary inner wall. In an exemplary embodiment, an exemplary first heat-transfer fluid may have a temperature higher than a temperature of an exemplary fresh air. In an exemplary embodiment, an exemplary recycling pipeline may be connected to a second end of an exemplary first tubular coil to a second end of an exemplary second tubular coil. In an exemplary embodiment, an exemplary supply pipeline may be connected to a first end of an exemplary first tubular coil to a first end of an exemplary second tubular coil.

[0009] In an exemplary embodiment, an exemplary second tubular coil may include a plurality of fins connected to an exemplary second tubular coil. In an exemplary embodiment, an exemplary plurality of fins may be extending longitudinally along a vertical axis of an exemplary two-walled gas outlet. In an exemplary embodiment, an exemplary plurality of fins may be made of at least one of corrosive resistant steel, copper, aluminum, titanium, and combinations thereof. In an exemplary embodiment, an exemplary plurality of fins made of at least one of aluminum, copper, and combinations thereof may be covered with an anticorrosion layer. In an exemplary embodiment, an exemplary anti-corrosion layer may include at least one of Teflon coatings, ceramic coatings, and combinations thereof.

[0010] In an exemplary embodiment, a size ratio of a tube width diameter of an exemplary second tubular coil to a height of an exemplary second tubular coil along an exemplary vertical axis may be in a range of 1 : 1 to 1:50 (tube width diameter of an exemplary second tubular coil: height of an exemplary second tubular coil). In an exemplary embodiment, a size ratio of a tube width diameter of an exemplary second tubular coil to an exemplary second passway may be in a range of 1:2 to 1: 10 (tube width diameter of an exemplary second tubular coil: an exemplary second passway).

[0011] In an exemplary embodiment, an exemplary closed-loop thermosiphon system may further include one first one-way valve placed within an exemplary supply pipeline. In an exemplary embodiment, an exemplary first one-way valve may allow an exemplary second heat-transfer fluid to move in one direction from an exemplary first tubular coil to an exemplary second tubular coil via an exemplary supply pipeline. In an exemplary embodiment, an exemplary first tubular coil may be positioned in a lower place in comparison to an exemplary second tubular coil. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may further include one second one-way valve placed within an exemplary recyclingpipeline forcing an exemplary second heat-transfer fluid to move in one direction from an exemplary second tubular coil to an exemplary first tubular coil through an exemplary recycling pipeline

[0012] In an exemplary embodiment, an exemplary supply pipeline may include a thermalinsulation layer covering an external surrounding of an exemplary supply pipeline. In an exemplary embodiment, an exemplary thermal-insulation layer may include at least one of polyurethane foams, polyethylene foams, expanded polystyrene, extruded polystyrene, phenolic foam, fiberglass, and combinations thereof. In an exemplary embodiment, an exemplary closed loop thermosiphon system may be made of at least one of aluminum, copper, corrosive resistant steel, titanium, and combinations thereof. In an exemplary embodiment, an exemplary closed loop thermosiphon system made of at least one of aluminum, copper, and combinations thereof may be covered with an anti-corrosion layer. In an exemplary embodiment, an exemplary anti-corrosion layer may include at least one of Teflon coatings, ceramic coatings, and combinations thereof. In an exemplary embodiment, an exemplary closed loop thermosiphon system may have an internal pressure in a range of 1 pa to 10 Mpa to establish a desired condensation temperature of an exemplary second heat-transfer fluid. In an exemplary embodiment, an exemplary second heat-transfer fluid may have a condensation temperature in a range of 10°C to 70°C.

[0013] In an exemplary embodiment, an exemplary first heat-transfer fluid may include at least one of water, alcohols, a refrigerant, and combinations thereof. In an exemplary embodiment, an exemplary refrigerant may include at least one of hydrochlorofluorocarbons, hydrofluorocarbons, hydrofluoroolefins, and combinations thereof.

[0014] In an exemplary embodiment, an exemplary second heat-transfer fluid may include at least one of water, alcohols, a refrigerant, and combinations thereof. In an exemplary embodiment, an exemplary refrigerant may include at least one of hydrochlorofluorocarbons, hydrofluorocarbons, hydrofluoroolefins, and combinations thereof. In an exemplary embodiment, a volume percent of an exemplary second heat-transfer fluid in liquid state to an exemplary closed-loop thermosiphon system may be in a range of 1% to 20%.

[0015] According to one or more exemplary embodiments, the present disclosure is directed to a closed-loop thermosiphon system for harvesting waste heat of an appliance and / or natural heat waste. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may include a first tubular coil placed within a sewage outlet and / or under a sea / ocean, a secondtubular coil placed within an inlet pipeline of an exemplary appliance, and a heat-transfer fluid circulating within an exemplary closed-loop thermosiphon system. In an exemplary embodiment, an exemplary first tubular coil may be in contact with a fluid waste and / or the sea / ocean water. In an exemplary embodiment, an exemplary sea / ocean water temperature may be 4°C. In an exemplary embodiment, an exemplary fluid waste may include at least one of waste heat, natural thermal energy, and combinations thereof. In an exemplary embodiment, an exemplary second tubular coil may be in contact with an inlet feed. In an exemplary embodiment, an exemplary first tubular coil may be positioned in a lower place in comparison to an exemplary second tubular coil. In an exemplary embodiment, a volume percent of an exemplary heat-transfer fluid in a liquid state to an exemplary closed-loop thermosiphon system may be in a range of 1% to 20%. In an exemplary embodiment, an exemplary closed- loop thermosiphon system may have an internal pressure in a range of 1 pa to 10 Mpa to establish a desired condensation temperature of the second heat-transfer fluid. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may further include a supply pipeline connecting a first end of an exemplary first tubular coil to a first end of an exemplary second tubular coil, a recycling pipeline connecting a second end of an exemplary first tubular coil to a second end of an exemplary second tubular coil.

[0016] In an exemplary embodiment, an exemplary appliance may include at least one of a heating system, a washing machine, a dishwasher, a bathroom pipeline, a dryer, a sink pipeline, an absorption chiller, public buildings, a large scale central heating system for a town or a city, and combinations thereof.

[0017] In an exemplary embodiment, an exemplary closed-loop thermosiphon system may further include one first one-way valve placed within an exemplary supply pipeline. In an exemplary embodiment, an exemplary first one-way valve may allow an exemplary heattransfer fluid to move in one direction from an exemplary first tubular coil to an exemplary second tubular coil via an exemplary supply pipeline. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may further include one second one-way valve placed within an exemplary recycling pipeline forcing an exemplary second heat-transfer fluid to move in one direction from an exemplary second tubular coil to an exemplary first tubular coil through an exemplary recycling pipeline

[0018] In an exemplary embodiment, an exemplary supply pipeline may include a thermalinsulation layer covering an external surrounding of an exemplary supply pipeline. In anexemplary embodiment, an exemplary thermal-insulation layer may include at least one of polyurethane foams, polyethylene foams, expanded polystyrene, extruded polystyrene, phenolic foam, fiberglass, and combinations thereof.

[0019] In an exemplary embodiment, an exemplary fluid waste may include at least one of vapor waste, liquid waste, solid waste, and combinations thereof. In an exemplary embodiment, an exemplary fluid waste may include waste heat. In an exemplary embodiment, each of an exemplary at least one of vapor waste, liquid waste, solid waste, and combinations thereof may contain waste heat. In an exemplary embodiment, an exemplary fluid waste may contain waste heat. In an exemplary embodiment, an exemplary inlet feed may include at least one of vapor, a liquid, and combinations thereof. In an exemplary embodiment, an exemplary closed-loop thermosiphon system has an internal pressure in a range of 1 pa to 10 Mpa to establish a desired condensation temperature of the second heat-transfer fluid.

[0020] In an exemplary embodiment, an exemplary heat-transfer fluid may include at least one of water, alcohols, a refrigerant, and combinations thereof. In an exemplary embodiment, an exemplary refrigerant may include at least one of hydrochlorofluorocarbons, hydrofluorocarbons, hydrofluoroolefms, and combinations thereof.

[0021] In an exemplary embodiment, an exemplary closed-loop thermosiphon system may further include a plurality of first tubular coils and a plurality of second tubular coils connecting to each other via a plurality of connection pipelines.

[0022] In an exemplary embodiment, an exemplary closed loop thermosiphon system may be made of at least one of aluminum, copper, corrosive resistant steel, titanium, and combinations thereof. In an exemplary embodiment, an exemplary closed loop thermosiphon system made of at least one of aluminum, copper, and combinations thereof may be covered with an anticorrosion layer. In an exemplary embodiment, an exemplary anti-corrosion layer may include at least one of Teflon coatings, ceramic coatings, and combinations thereof.

[0023] According to one or more exemplary embodiments, the present disclosure is directed to a closed-loop thermosiphon system for recovering waste heat of available natural thermal energy on earth. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may include at least one first tubular coil placed on the ground within a water container, at least one second tubular coil placed in a height with a temperature of maximum 3°C using a balloon filled with at least one of helium, hydrogen, hot gases, and combinations thereof, one supply pipeline connecting a first end of an exemplary at least one first tubular coil to a first end of anexemplary at least one second tubular coil one recycling pipeline connecting a second end of an exemplary at least one first tubular coil to a second end of an exemplary at least one second tubular coil, and a heat-transfer fluid circulating within an exemplary closed-loop thermosiphon system. In an exemplary embodiment, an exemplary supply pipeline may be made of a light weight and flexible material. In an exemplary embodiment, an exemplary recycling pipeline may be made of a light weight and flexible material. In an exemplary embodiment, a volume percent of an exemplary heat-transfer fluid in a liquid state to an exemplary closed-loop thermosiphon system may be in a range of 1% to 20%. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may have an internal pressure in a range of 1 pa to 10 Mpa to establish a desired condensation temperature of the second heattransfer fluid. In an exemplary embodiment, an exemplary water container may be filled with water. In an exemplary embodiment, an exemplary at least one first tubular coil may be in contact with water inside an exemplary water container. In an exemplary embodiment, an exemplary water container may be used as a coolant source. In an exemplary embodiment, an exemplary at least one first tubular coil may include a plurality of fins extended longitudinally along a vertical axis. In an exemplary embodiment, an exemplary at least one second tubular coil may include a plurality of fins extended longitudinally along a vertical axis. In an exemplary embodiment, an exemplary supply pipeline may include a thermal insulation layer covering external surrounding of an exemplary supply pipeline. In an exemplary embodiment, an exemplary water container may include a water inlet and a water outlet. In an exemplary embodiment, evaporation of an exemplary heat-transfer fluid within an exemplary at least one first tubular coil may decrease temperature of water within an exemplary water container. In an exemplary embodiment, water inside an exemplary water container may include anti-freeze solutions. In an exemplary embodiment, water may be replaced by other lower freezing temperatures liquids. In an exemplary embodiment, an exemplary water may include at least one of urban water, industrial water, and combinations thereof.BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawing figures depict one or more implementations in accordance with the present teachings, by way of example only, not by way of limitation. The teaching is not limited to the figures. In the figures, like reference numerals refer to the same or similar elements.

[0025] FIG. 1A illustrates a perspective view of a waste heat recovery heating system, consistent with one or more exemplary embodiments of the present disclosure;

[0026] FIG. IB illustrates a cross sectional view of an exemplary waste heat recovery heating system, consistent with one or more exemplary embodiments of the present disclosure;

[0027] FIG. 2A illustrates a perspective view of a first close-loop thermosiphon system, consistent with one or more exemplary embodiments of the present disclosure;

[0028] FIG. 2B illustrate a cross sectional view of an exemplary first close-loop thermosiphon system, consistent with one or more exemplary embodiments of the present disclosure;

[0029] FIG. 3A illustrates a perspective view of a second closed-loop thermosiphon system, consistent with one or more exemplary embodiments of the present disclosure;

[0030] FIG. 3B illustrates a cross-sectional view of an exemplary second closed-loop thermosiphon system, consistent with one or more exemplary embodiments of the present disclosure;

[0031] FIG. 4A illustrates a perspective view of a third closed loop thermosiphon system, consistent with one or more exemplary embodiments of the present disclosure;

[0032] FIG. 4B illustrates a cross-sectional view of an exemplary third closed loop thermosiphon system, consistent with one or more exemplary embodiments of the present disclosure;

[0033] FIG. 5 illustrates a perspective view of a fourth closed-loop thermosiphon system, consistent with one or more exemplary embodiments of the present disclosure.

[0034] FIG. 6A illustrates a perspective view of an exemplary fifth closed-loop thermosiphon system installed on the ground, consistent with one or more exemplary embodiments of the present disclosure;

[0035] FIG. 6B illustrates a perspective view of an exemplary fifth closed-loop thermosiphon system, consistent with one or more exemplary embodiments of the present disclosure;

[0036] FIG. 6C illustrates a perspective view of an exemplary at least one first tubular coil placed in an exemplary water container, consistent with one or more exemplary embodiments of the present disclosure; and

[0037] FIG. 6D illustrates a closed-look view of an exemplary first tubular coil and an exemplary second tubular coil, consistent with one or more exemplary embodiments of the present disclosure.DESCRIPTION OF EMBODIMENTS

[0039] In the following detailed description, numerous specific details are set forth by way of examples in order to provide a thorough understanding of the relevant teachings. However, it should be apparent that the present teachings may be practiced without such details. In other instances, well known methods, procedures, components, and / or circuitry have been described at a relatively high-level, without detail, in order to avoid unnecessarily obscuring aspects of the present teachings.

[0040] The novel features which are believed to be characteristic of the present disclosure, as to its structure, organization, use and method of operation, together with further objectives and advantages thereof, will be better understood from the following discussion. In the following detailed description, numerous specific details are set forth by way of examples in order to provide a thorough understanding of the relevant teachings. However, it should be apparent that the present teachings may be practiced without such details. In other instances, well known methods, procedures, components, and / or circuitry have been described at a relatively high- level, without detail, in order to avoid unnecessarily obscuring aspects of the present teachings. The following detailed description is presented to enable a person skilled in the art to make and use the methods and devices disclosed in exemplary embodiments of the present disclosure. For purposes of explanation, specific nomenclature is set forth to provide a thorough understanding of the present disclosure. However, it will be apparent to one skilled in the art that these specific details are not required to practice the disclosed exemplary embodiments. Descriptions of specific exemplary embodiments are provided only as representative examples. Various modifications to the exemplary implementations will be readily apparent to one skilled in the art, and the general principles definned herein may be applied to other implementations and applications without departing from the scope of the present disclosure. The present disclosure is not intended to be limited to the implementations shown, but is to be accorded the widest possible scope consistent with the principles and features disclosed herein.

[0041] The present disclosure is directed to exemplary embodiments of a closed-loop thermosiphon system coupled with at least one appliance. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may be used to improve efficiency of an exemplary at least one appliance. In an exemplary embodiment, an exemplary at least one appliance may include at least one of a heating unit, a washing machine, a dishwasher, a bathroom pipeline, a dryer, a sink pipeline, an absorption chiller, public buildings, andcombinations thereof. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may harvest waste heat of an exemplary at least one appliance.

[0042] In an exemplary embodiment, an exemplary closed-loop thermosiphon system may be coupled with an exemplary heating unit to form a waste heat recovery heating system. In an exemplary embodiment, an exemplary heating unit may be used for at least one of providing hot water, warming a space, and combinations thereof. In an exemplary embodiment, an exemplary heating unit may include a heater, an inlet pipeline, an outlet pipeline, a first heattransfer fluid, and a two-walled gas outlet. In an exemplary embodiment, an exemplary first heat-transfer fluid may circulate within an exemplary inlet pipeline, an exemplary outlet pipeline, an exemplary heater and at least one heat exchanging unit. In an exemplary embodiment, an exemplary at least one heat exchanging unit may include at least one of a heating pipeline, a condensing pipeline, and combinations thereof. In an exemplary embodiment, an exemplary heating pipeline may be used for heating water. In an exemplary embodiment, an exemplary condensing pipeline may be used for heating an exemplary space. In an exemplary embodiment, an exemplary inlet pipeline may be connected to an exemplary heater and an exemplary at least one heat exchanging unit. In an exemplary embodiment, an exemplary outlet pipeline may be connected to an exemplary heater and an exemplary at least one heat exchanging unit. In an exemplary embodiment, an exemplary first heat-transfer fluid may have a temperature in a range of 20°C to 95°C when returning back to an exemplary heater via an exemplary inlet pipeline. In an exemplary embodiment, high temperature of an exemplary first heat-transfer fluid may hinder heat absorption of steam produced by an exemplary heater. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may decrease temperature of an exemplary first heat-transfer fluid within an exemplary inlet pipeline before entering an exemplary heater. In an exemplary embodiment, an exemplary waste heat of steam may be harvested by cooling an exemplary steam to a temperature below a dew point temperature of an exemplary steam. In an exemplary embodiment, an exemplary “dew point temperature” may refer a temperature at which an exemplary steam may become saturated with moisture, leading to formation of dew, fog, or clouds. In an exemplary embodiment, when temperature of an exemplary steam drops to an exemplary dew point, it may convey that an exemplary steam is holding as much moisture as an exemplary steam can in a form of water vapor. In an exemplary embodiment, excess water vapor may condense into liquid water or dew if an exemplary temperature continues to decrease below an exemplarycorresponding dew point. In an exemplary embodiment, an exemplary waste heat of steam may be harvested by cooling an exemplary steam (burnt gases in an exemplary heater) to a temperature below a dew point temperature of an exemplary steam using a closed-loop thermosiphon system.

[0043] In an exemplary embodiment, an exemplary two-walled gas outlet may include an inner wall and an outer wall. In an exemplary embodiment, an exemplary inner wall may be housed within an exemplary outer wall. In an exemplary embodiment, a space between an exemplary outer wall and an exemplary inner wall may be open from one end forming a second passway. In an exemplary embodiment, an exemplary second passway may be used for entering fresh air into an exemplary heater. In an exemplary embodiment, an exemplary fresh air may be used for combustion in an exemplary heater. In an exemplary embodiment, an exemplary twowalled gas outlet may be employed to remove combustion gases through an exemplary inner wall. In an exemplary embodiment, a size ratio of a tube diameter of an exemplary second tubular coil to an exemplary second passway may be in a range of 1:2 to 1: 10 (tube diameter of an exemplary second tubular coil: an exemplary second passway). In an exemplary embodiment, an exemplary second passway may include a diameter difference of an exemplary inner wall and an exemplary outer wall.

[0044] In an exemplary embodiment, an exemplary closed-loop thermosiphon system may include a first tubular coil, a second tubular coil, a supply pipeline, a recycling pipeline, and a second heat-transfer fluid. In an exemplary embodiment, an exemplary first tubular coil may be placed within an exemplary inlet pipeline. In an exemplary embodiment, an exemplary first tubular coil may be dipped within an exemplary first heat-transfer fluid. In an exemplary embodiment, an exemplary second tubular coil may encircle an exemplary inner wall. In an exemplary embodiment, an exemplary second heat-transfer fluid may circulate within an exemplary closed-loop thermosiphon system. In an exemplary embodiment, an exemplary second heat-transfer fluid may include at least one of water, alcohols, a refrigerant, and combinations thereof. In an exemplary embodiment, an exemplary refrigerant may include at least one of hydrochlorofluorocarbons, hydrofluorocarbons, hydrofluoroolefins, and combinations thereof. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may be made of at least one of copper, aluminum, and combinations thereof. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may have an internalpressure in a range of 1 pa to 10 Mpa to establish a desired condensation temperature of the second heat-transfer fluid.

[0045] In an exemplary embodiment, an exemplary closed-loop thermosiphon system may operate on a principle of natural convection to transfer heat. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may operate without need for mechanical pumps or external power sources when an exemplary first tubular coil is placed at a lower height in comparison to an exemplary second tubular coil. In an exemplary embodiment, an exemplary second heat-transfer fluid may be recycled within an exemplary closed-loop thermosiphon system. In an exemplary embodiment, an exemplary second tubular coil may include a finned tubular coil. In an exemplary embodiment, an exemplary “finned tubular coil” may refer to an exemplary second tubular coil with a plurality of extended fins attached to an exemplary second tubular coil. In an exemplary embodiment, an exemplary plurality of fins may be extended longitudinally along a vertical axis of an exemplary two-walled gas outlet. In an exemplary embodiment, an exemplary plurality of fins may increase surface area of an exemplary second tubular coil, allowing for more efficient heat transfer. In an exemplary embodiment, an exemplary second tubular coil may be in contact with fresh air. In an exemplary embodiment, an exemplary fresh air may be heated when passing over an exemplary second tubular coil. In an exemplary embodiment, an exemplary fresh air may include incoming air into an exemplary waste heat recovery heating system.

[0046] In an exemplary embodiment, an exemplary second heat-transfer fluid within an exemplary first tubular coil may be heated in contact with an exemplary first heat-transfer fluid. In an exemplary embodiment, heating an exemplary second heat-transfer fluid may cause an exemplary second heat-transfer fluid to evaporate. In an exemplary embodiment, heating an exemplary second heat-transfer fluid may cause an exemplary second heat-transfer fluid to become less dense. In an exemplary embodiment, an exemplary heated second heat-transfer fluid may rise through an exemplary supply pipeline. In an exemplary embodiment, an exemplary heated second heat-transfer fluid may create a flow, drawing cooler second heattransfer fluid from a lower point in an exemplary closed-loop thermosiphon system. In an exemplary embodiment, an exemplary vaporized second heat-transfer fluid may pass through an exemplary supply pipeline to enter an exemplary second tubular coil. In an exemplary embodiment, an exemplary vaporized second heat-transfer fluid may be condensed in contact with fresh air within an exemplary second tubular coil. In an exemplary embodiment, anexemplary condensed second heat-transfer fluid may then move towards (back down) an exemplary first tubular coil to be reheated, thus completing an exemplary cycle. In an exemplary embodiment, an exemplary second heat-transfer fluid may enter an exemplary first tubular coil via an exemplary recycling pipeline. In an exemplary embodiment, an exemplary second heat-transfer fluid may circulate in a closed circuit, continuously transferring heat energy between an exemplary first tubular coil and an exemplary second tubular coil. In an exemplary embodiment, an exemplary closed-loop design may ensure efficient heat transfer while minimizing heat loss to surroundings. In an exemplary embodiment, an exemplary process may be repeated again for harvesting waste heat steam of an exemplary heating unit. In an exemplary embodiment, an exemplary supply pipeline may include a thermal-insulation layer covering an external surrounding of an exemplary supply pipeline. In an exemplary embodiment, an exemplary thermal-insulation layer may include at least one of polyurethane foams, polyethylene foams, expanded polystyrene, extruded polystyrene, phenolic foam, fiberglass, and combinations thereof. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may include a first one-way valve through an exemplary supply pipeline for guiding an exemplary second heat-transfer fluid passage in one direction from an exemplary first tubular coil to an exemplary second tubular coil. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may include a second one-way valve through an exemplary recycling pipeline. In an exemplary embodiment, an exemplary second one-way valve may direct an exemplary second heat-transfer fluid from an exemplary second tubular coil to an exemplary first tubular coil.

[0047] In an exemplary embodiment, a temperature of an exemplary first heat-transfer fluid entering an exemplary heater may be below dew point for achieving high efficiency in an exemplary waste heat recovery heating system. In an exemplary embodiment, lowering an exemplary temperature of an exemplary first heat-transfer fluid may absorb steam heat of exemplary combustion gases. In an exemplary embodiment, lowering an exemplary temperature of an exemplary first heat-transfer fluid may improve absorption of an exemplary latent heat of an exemplary water vapor contained in exemplary combustion gases for more temperature difference of an exemplary first heat-transfer fluid inside of a tubular coil in contact with the burnt gases. In an exemplary embodiment, an exemplary steam heat may include latent heat. In an exemplary embodiment, an exemplary steam heat may include at least one of an exemplary latent heat of an exemplary water vapor, a sensible heat that is containedin exemplary burnt gases, and combinations thereof. In an exemplary embodiment, using an exemplary closed-loop thermosiphon system may at least absorb latent heat by condensing an exemplary steam, heat up an exemplary fresh air entering through an exemplary space between an exemplary inner wall and an exemplary outer wall, and combinations thereof.

[0048] In an exemplary embodiment, an exemplary closed-loop thermosiphon system may enable extension of an exemplary waste heat recovery heating system usage to nearly any location. In an exemplary embodiment, amount of an exemplary second heat-transfer fluid required for heat transfer may be notably diminished through incorporation of an exemplary at least one of forced convection within an exemplary closed-loop thermosiphon system, utilization of larger surface areas along an exemplary closed-loop thermosiphon system, and combinations thereof. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may necessitate less than 3% by weight of an exemplary second heat-transfer fluid compared to a standard condensing heating system utilizing water in a liquid state, while still transferring the same amount of heat. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may necessitate as low as 3% by weight of an exemplary second heattransfer fluid compared to a standard condensing heating system utilizing water in a liquid state, while still transferring the same amount of heat.

[0049] In an exemplary embodiment, an exemplary closed-loop thermosiphon system may operate under a pressure in a range of 1 pa to 10 Mpa to establish a desired condensation temperature of the second heat-transfer fluid. In an exemplary embodiment, leveraging a latent heat of an exemplary steam and an exemplary second heat-transfer fluid may enhance efficiency of an exemplary waste heat recovery heating system by reducing an exemplary second heat-transfer fluid volume. In an exemplary embodiment, a volume percent of an exemplary second heat-transfer fluid in liquid state to an exemplary closed-loop thermosiphon system may be in a range of 1% to 20%. In an exemplary embodiment, an exemplary “Latent heat” may refer to a heat energy absorbed or released by an exemplary second heat-transfer fluid during a phase change without a corresponding change in temperature. In an exemplary embodiment, an exemplary latent heat may imply a state of thermal equilibrium, where despite an exchange of heat, a temperature of at least one of an exemplary steam, an exemplary second heat transfer fluid, and combinations thereof may remain constant during phase change. In an exemplary embodiment, an exemplary latent heat may refer to an amount of heat energy absorbed or released when at least one of an exemplary steam, an exemplary second heat-transfer fluid, and combinations thereof may change between liquid and gas states (or vice versa) at constant temperature. In an exemplary embodiment, exhaust gases carry both water vapor and latent heat of water vapor. When temperature of an exemplary first heat-transfer fluid returning through an exemplary heating inlet is decreased, outer surface of a pipeline within an exemplary heating system may cool below an exemplary dew point of water vapor. As a result, an exemplary latent heat from an exemplary water vapor in exemplary exhaust gases may be absorbed by both an exemplary pipeline and an exemplary second heat-transfer fluid.

[0050] In another exemplary embodiment, an exemplary thermosiphon system may be coupled with an appliance. In an exemplary embodiment, an exemplary appliance may include at least one of an exemplary bathroom pipeline, an exemplary washing machine, an exemplary dishwasher, an exemplary sink pipeline, an exemplary absorption chiller, exemplary public buildings, and combinations thereof. In an exemplary embodiment, an exemplary first tubular coil of an exemplary thermosiphon system may be placed in a sewage outlet of an exemplary appliance for harvesting waste heat of an exemplary appliance. In an exemplary embodiment, an exemplary second tubular coil of an exemplary thermosiphon system may be placed in contact with inlet feed of an exemplary appliance. In an exemplary embodiment, an exemplary second tubular coil of an exemplary thermosiphon system may be placed in contact with passages of cooler fluid such as an exemplary incoming cold water / air to at least one of an exemplary appliance, other appliances, into a room or building, and combinations thereof.

[0051] In an exemplary embodiment, an exemplary first tubular coil may be dipped within a fluid waste (containing waste heat) of an exemplary at least one of an exemplary bathroom pipelines, an exemplary washing machine, an exemplary dishwasher, an exemplary dryer , an exemplary sink pipeline, an exemplary absorption chiller, exemplary public buildings, and combinations thereof. In an exemplary embodiment, an exemplary second tubular coil may be placed within an inlet feed of an exemplary appliance. In an exemplary embodiment, an exemplary second tubular coil may be dipped within an exemplary inlet feed. In an exemplary embodiment, an exemplary second tubular coil may be placed below a road surface. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may heat an exemplary road surface by transferring waste heat of sewage fluid to an exemplary road surface. In an exemplary embodiment, heating an exemplary road surface may prevent an exemplary road surface from freezing.

[0052] In an exemplary embodiment, an exemplary second heat-transfer fluid may be heated when passing an exemplary first tubular coil. In an exemplary embodiment, an exemplary second heat-transfer fluid may absorb heat from an exemplary fluid waste. In an exemplary embodiment, an exemplary second heat-transfer fluid may evaporate and reach an exemplary second tubular coil via an exemplary supply pipeline. In an exemplary embodiment, an exemplary evaporated second heat-transfer fluid may release heat upon contact with an exemplary feed inlet. In an exemplary embodiment, an exemplary evaporated second heattransfer fluid may release heat upon contact with an exemplary road surface. In an exemplary embodiment, an exemplary feed inlet may become warm due to transfer of heat energy from an exemplary second heat-transfer fluid passing through an exemplary second tubular coil. In an exemplary embodiment, an exemplary second heat-transfer fluid may return back to an exemplary first tubular coil via an exemplary recycling pipeline. In an exemplary embodiment, an exemplary cycle may be repeated many times for harvesting waste heat of an exemplary at least one of appliances. In an exemplary embodiment, an exemplary fluid waste in at least one of an exemplary washing machine, an exemplary dishwasher, an exemplary bathroom pipeline, an exemplary sink pipeline, and combinations thereof may be hot water. In an exemplary embodiment, an exemplary hot water may have a temperature in a range of 30°C to 95°C. In an exemplary embodiment, an exemplary fluid waste in an exemplary dryer may be hot air. In an exemplary embodiment, an exemplary hot air may have a temperature of at least 30°C. In an exemplary embodiment, an exemplary feed inlet in at least one of an exemplary washing machine, an exemplary dishwasher, an exemplary bathroom pipeline an exemplary sink pipeline, and combinations thereof may be water. In an exemplary embodiment, an exemplary feed inlet in at least one of an exemplary dryer, an exemplary absorption chiller, and combinations thereof may be fresh air. In an exemplary embodiment, an exemplary first tubular coil may be placed at a bottom of seas / oceans where temperature of water is 4°C. In an exemplary embodiment, an exemplary second tubular coil may be placed through at least one of urban pipelines, industrial pipelines, and combinations thereof. In an exemplary embodiment, an exemplary second heat-transfer fluid may evaporate within an exemplary first tubular coil. In an exemplary embodiment, an exemplary second heat-transfer fluid may be condensed within an exemplary second tubular coil. In an exemplary embodiment, an exemplary waste heat (available natural heat) of water at a bottom of exemplary seas / oceans may be recovered and used in domestic and industrial consumption. In an exemplaryembodiment, an exemplary waste heat of water at a bottom of exemplary seas / oceans may be used for heating purposes.

[0053] In an exemplary embodiment, an exemplary absorption chiller may be a type of cooling system that use heat as an energy source to produce chilled water or cooling. In an exemplary embodiment, an exemplary absorption chiller may include an evaporator, an absorber, a generator, a condenser, and a heat source. In an exemplary embodiment, a refrigerant may absorb heat and cool a circulating water in an exemplary evaporator. In an exemplary embodiment, an exemplary refrigerant vapor may be absorbed by an exemplary absorber, releasing heat. In an exemplary embodiment, an exemplary heat may be applied to separate an exemplary refrigerant from an exemplary absorbent solution in an exemplary generator. In an exemplary embodiment, an exemplary refrigerant vapor may be condensed and release heat in an exemplary condenser. In an exemplary embodiment, an exemplary heat source may be provided with heat absorbed from sewage fluids using an exemplary closed-loop thermosiphon system. In an exemplary embodiment, an exemplary second tubular coil may be placed in an exemplary heat source.

[0054] In an exemplary embodiment, an exemplary closed-loop thermosiphon system may be used for harvesting waste heat of an exemplary appliance by harvesting heat from fluid waste and transferring an exemplary absorbed heat to an exemplary feed inlet. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may be used for harvesting waste heat of an exemplary appliance by harvesting heat from fluid waste and transferring an exemplary absorbed heat to an exemplary road surface. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may function based on natural convection to transfer an exemplary absorbed heat. In an exemplary embodiment, an exemplary thermosiphon system may have an internal pressure in a range of 1 pa to 10 Mpa to establish a desired condensation temperature of the second heat-transfer fluid.

[0055] In an exemplary embodiment, an exemplary closed-loop thermosiphon system may be used for recovering waste heat from the earth. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may include at least one first tubular coil immersed within a water container. In an exemplary embodiment, an exemplary at least one first tubular coil may include a plurality of fins attached to an exemplary at least one first tubular coil. In an exemplary embodiment, an exemplary plurality of fins may be extended longitudinally along a vertical axis. In an exemplary embodiment, an exemplary water container may serve as acooling source. In an exemplary embodiment, an exemplary water container may include a water inlet and a water outlet. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may include at least one second tubular coil. In an exemplary embodiment, an exemplary at least one second tubular coil may be situated at a height with a temperature of the atmosphere below 3°C. In an exemplary embodiment, an exemplary at least one second tubular coil may be supported by a balloon in the sky. In an exemplary embodiment, an exemplary balloon may be fdled with at least one of helium, hydrogen, hot gases, and combinations thereof. In an exemplary embodiment, an exemplary at least one second tubular coil may be equipped with a plurality of fins. In an exemplary embodiment, an exemplary plurality of fins may be extended longitudinally along an exemplary vertical axis. In an exemplary embodiment, a first end of each of an exemplary at least one first coil may be interconnected to a first end of each of an exemplary at least one second coil via at least one supply pipeline. In an exemplary embodiment, a second end of each of an exemplary at least one first coil may be interconnected to a second end of each of an exemplary at least one second coil via at least one recycling pipeline. In an exemplary embodiment, an exemplary supply pipeline may be covered with a thermal insulation layer. In an exemplary embodiment, an exemplary thermal insulation layer may include at least one of polyurethane foams, polyethylene foams, expanded polystyrene, extruded polystyrene, phenolic foam, fiberglass, and combinations thereof. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may include a heat-transfer fluid circulating within an exemplary closed- loop thermosiphon system. In an exemplary embodiment, a volume percent of an exemplary heat-transfer fluid in a liquid state to an exemplary closed-loop thermosiphon system may be in a range of 1% to 20%. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may have an internal pressure in a range of 1 pa to 10 Mpa to establish a desired condensation temperature of the second heat-transfer fluid.

[0056] In an exemplary embodiment, an exemplary heat transfer fluid within an exemplary at least one first coil may be evaporated in contact with water inside an exemplary water container. An exemplary heat transfer fluid may rise through an exemplary supply pipeline and reach an exemplary second pipeline. In an exemplary embodiment, an exemplary heat transfer fluid may be condensed within an exemplary second tubular coil in contact with cold air at a height with a temperature of maximum 3°C. In an exemplary embodiment, an exemplary condensed heat-transfer fluid may sink back to an exemplary first tubular coil for repeating anexemplary cycle. In an exemplary embodiment, an exemplary evaporation of an exemplary heat-transfer fluid within an exemplary first tubular coil may absorb heat of water within an exemplary water container. In an exemplary embodiment, cooling water within an exemplary water container may decrease temperature of flow water passing through an exemplary water container. In an exemplary embodiment, an exemplary water flow may be used as a cooled water source for at least one of urban use, industrial use, and combinations thereof.

[0057] Water is a critical element in cement industries, steel industries, and nuclear reactors, primarily used for heat recovery and cooling purposes. Significant amounts of heat are generated as byproducts in cement and steel industries. Water’s high heat capacity and resilience to elevated temperatures makes it an ideal medium for absorbing waste heat in cement, steel industries, and nuclear reactors. Additionally, water serves as a coolant in machinery like kilns and furnaces, helping maintain optimal operating temperatures and prevent overheating. By recovering waste heat. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may be used for recovering waste heat of steel, cement industry, and nuclear reactors. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may include a first tubular coil, a second tubular coil. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may include a supply pipeline connecting a first end of an exemplary first tubular coil with a first end of an exemplary second tubular coil. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may include a recycling pipeline connecting a second end of an exemplary first tubular coil with a second end of an exemplary second tubular coil. In an exemplary embodiment, an exemplary closed-loop thermosiphon system may include a heat-transfer fluid circulating within an exemplary closed-loop thermosiphon system. In an exemplary embodiment, an exemplary first tubular coil may be placed within an exemplary hot water exiting at least one of cement factory, steel factory, nuclear reactors, and combinations thereof. In an exemplary embodiment, an exemplary heat-transfer fluid within an exemplary first tubular coil may be evaporated in contact with an exemplary hot water. In an exemplary embodiment, an exemplary evaporated heat-transfer fluid may enter an exemplary second tubular coil. In an exemplary embodiment, an exemplary second tubular coil may be placed within an absorption chiller. In an exemplary embodiment, an exemplary evaporated heat-transfer fluid may be used as a thermal energy source required in an exemplary absorption chiller. In an exemplaryembodiment, an exemplary heat-transfer fluid may be recycled within an exemplary closed- loop thermosiphon system.

[0058] FIG. 1A illustrates a schematic view 100 of a waste heat recovery heating system 102, consistent with one or more exemplary embodiments of the present disclosure. In an exemplary embodiment, waste heat recovery heating system 102 may include a heating unit 104 and a first closed-loop thermosiphon system 106. In an exemplary embodiment, heating unit 104 may include a heater 108, an inlet pipeline 107, an outlet pipeline 111, a first heat-transfer fluid, and a two-walled gas outlet 113. In an exemplary embodiment, waste heat recovery heating system 102 may further include a cover to encompass heating unit 104 and first closed-loop thermosiphon system 106. In an exemplary embodiment, an exemplary first heat-transfer fluid may circulate within heater 108, inlet pipeline 107, and outlet pipeline 111. In an exemplary embodiment, heater 108 may produce heat for increasing temperature of an exemplary first heat-transfer fluid. In an exemplary embodiment, heating unit 104 may be connected to at least one heat exchanging unit. In an exemplary embodiment, an exemplary at least one heat exchanging unit may include at least one of a heating pipeline, a condensing pipeline, and combinations thereof. In an exemplary embodiment, heater 108 may be used for at least one of providing hot water, warming a space, and combinations thereof. In an exemplary embodiment, an exemplary first heat-transfer fluid may circulate within inlet pipeline 107, outlet pipeline 111, heater 108, and at least one heat exchanging unit. In an exemplary embodiment, an exemplary heating pipeline may be used for heating water. In an exemplary embodiment, an exemplary condensing pipeline may be use d for heating an exemplary space. In an exemplary embodiment, inlet pipeline 107 may be connected to heater 108 and an exemplary at least one heat exchanging unit. In an exemplary embodiment, outlet pipeline 111 may be connected to heater 108 and an exemplary at least one heat exchanging unit. In an exemplary embodiment, an exemplary first heat-transfer fluid may pass through inlet pipeline 107 and outlet pipeline 111. In an exemplary embodiment, inlet pipeline 107 may be connected to heater 108. In an exemplary embodiment, inlet pipeline 107 may allow passage of an exemplary first heattransfer fluid there within toward heater 108 in direction 117. In an exemplary embodiment, outlet pipeline 111 may be connected to heater 108. In an exemplary embodiment, outlet pipeline 111 may allow a heated first heat-transfer fluid to exit heater 108 in direction 118. In an exemplary embodiment, an exemplary first heat-transfer fluid may be heated when passing close to heater 108. In an exemplary embodiment, an exemplary heated first heat-transfer fluidmay have a temperature in a range of 30°C to 95 °C. In an exemplary embodiment, an exemplary first heat-transfer fluid may include at least one of water, alcohols, a refrigerant, and combinations thereof. In an exemplary embodiment, an exemplary refrigerant may include at least one of hydrochlorofluorocarbons, hydrofluorocarbons, hydrofluoroolefins, and combinations thereof. In an exemplary embodiment, an exemplary alcohol may include at least one of isopropyl alcohol, ethanol, and combinations thereof. In an exemplary embodiment, hydrochlorofluorocarbons may include chlorodifluoromethane. In an exemplary embodiment, hydrofluorocarbons may include 1,1,1,2-tetrafluoroethan, a blend of pentafluoropropane, 1,1,1,2-tetrafluoroethane, and 1,1,1 -Trifluoroethane, a blend of difluoromethane and pentafluoroethane, a blend of difluoromethane, pentafluoroethane, and 1,1,1,2- tetrafluoroethane, and 2,3,3,3-tetrafluoropropene. In an exemplary embodiment, hydrofluoroolefins may include 2,3,3,3-tetrafluoropropene.

[0059] In an exemplary embodiment, two-walled gas outlet 113 may include an inner wall 112 and an outer wall 110. In an exemplary embodiment, inner wall 112 may be housed within outer wall 110. In an exemplary embodiment, a space between outer wall 110 and inner wall 112 may be open from one end 116 of two-walled gas outlet 113 forming an exemplary second passway. In an exemplary embodiment, an exemplary second passway may be used for entering fresh air into waste heat recovery heating system 102 through first direction 115. In an exemplary embodiment, fresh air may be used for combustion in heater 108. In an exemplary embodiment, two-walled gas outlet 113 may be employed to remove produced combustion gases through inner wall 112 in second direction 114. In another exemplary embodiment, twowalled gas outlet 113 may be utilized to introduce fresh air from an exemplary second passway toward heater 108. In an exemplary embodiment, a size ratio of a tube diameter of an exemplary second tubular coil to an exemplary second passway may be in a range of 1:2 to 1: 10 (tube diameter of an exemplary second tubular coil: an exemplary second passway). In an exemplary embodiment, an exemplary second passway may be a distance between an exemplary inner wall and an exemplary outer wall. In an exemplary embodiment, first closed-loop thermosiphon system 106 may be used for at least one of decreasing temperature of an exemplary first heat-transfer fluid passing inlet pipeline 107, increasing temperature of fresh air entering through inner wall 112, and combinations thereof.

[0060] FIG. IB illustrates a cross sectional view 120 of waste heat recovery heating system 102, consistent with one or more exemplary embodiments of the present disclosure. In anexemplary embodiment, waste heat recovery heating system 102 may include heating unit 104, and first closed-loop thermosiphon system 106. In an exemplary embodiment, heating unit 104 may include heater 108, inlet pipeline 107, and outlet pipeline 111. In an exemplary embodiment, waste heat recovery heating system 102 may be connected to at least one heat exchanging unit via inlet pipeline 107 and outlet pipeline 111. In an exemplary embodiment, an exemplary heat-exchanging unit may include at least one of a pipeline for heating water and a pipeline for increasing temperature of a space. In an exemplary embodiment, inlet pipeline 107 may be connected to an outlet of at least one heat-exchanging unit. In an exemplary embodiment, outlet pipeline 111 may be connected to an inlet of at least one heat-exchanging unit. In an exemplary embodiment, an exemplary first heat-transfer fluid may recycle within heater 108, and at least one heat-exchanging unit. In an exemplary embodiment, an exemplary first heat-transfer fluid may transfer heat to at least one heat exchanging unit. In an exemplary embodiment, an exemplary first heat-transfer fluid may enter inlet pipeline 107 via inlet direction 117. In the same exemplary embodiment, an exemplary first heat-transfer fluid may exit heater 108 via outlet pipeline 111 in direction 118.

[0061] FIG. 2A illustrates a perspective view 200 of first closed-loop thermosiphon system 106, consistent with one or more exemplary embodiments of the present disclosure. In an exemplary embodiment, first closed-loop thermosiphon system 106 may include a first tubular coil 202, a second tubular coil 204, a supply pipeline 206, a recycling pipeline 208, and a second heat-transfer fluid. In an exemplary embodiment, an exemplary second heat-transfer fluid may circulate within first closed-loop thermosiphon system 106. In an exemplary embodiment, an exemplary second heat-transfer fluid may include at least one of water, alcohols, a refrigerant, and combinations thereof. In an exemplary embodiment, an exemplary refrigerant may inlcude at least one of hydrochlorofluorocarbons, hydrofluorocarbons, hydrofluoroolefins, and combinations thereof. In an exemplary embodiment, an exemplary second heat-transfer fluid may have a condensation temperature in a range of I0°C to 70°C. In an exemplary embodiment, first tubular coil 202 may be placed within inlet pipeline 210. In an exemplary embodiment, first tubular coil 202 may be dipped within an exemplary first heattransfer fluid. In an exemplary embodiment, second tubular coil 204 may encircle inner wall 212. In an exemplary embodiment, a size ratio of a tube diameter of second tubular coil 204 to a height of second tubular coil 204 along vertical axis 214 may be in a range of 1: 1 to 1 :50 (tube diameter of second tubular coil 204: height of second tubular coil 204). In an exemplaryembodiment, inner wall 212 may be similar to inner wall 112. In an exemplary embodiment, inlet pipeline 210 may be similar to inlet pipeline 107. In an exemplary embodiment, first closed-loop thermosiphon system 106 may be made of at least one of copper, corrosive resistant steel, aluminum, titanium, and combinations thereof. In an exemplary embodiment, first closed-loop thermosiphon system 106 may have an internal pressure in a range of 1 pa to 10 Mpa. In an exemplary embodiment, the lower an exemplary temperature of an exemplary returned first heat-transfer fluid, exemplary burnt gases including water vapor may be better condensed when exemplary burnt gases are exposed to an exemplary cold first heat-transfer fluid. In an exemplary embodiment, an exemplary recovered heat from exemplary burnt gases leaving waste heat recovery heating system 102 may be used to heat up an exemplary returned first heat-transfer fluid within heater 108.

[0062] In an exemplary embodiment, an exemplary second heat-transfer fluid may recycle within first closed-loop thermosiphon 106. In an exemplary embodiment, an exemplary second heat-transfer fluid may be heated when passing through first tubular coil 202. In an exemplary embodiment, first tubular coil 202 may be dipped within inlet pipeline 210. In an exemplary embodiment, inlet pipeline 210 may be widened where first tubular coil 202 is placed. In an exemplary embodiment, increasing a diameter of inlet pipeline 210 in a section 217 where first tubular coil 202 is located may prevent inlet pipeline 210 from getting blocked. In an exemplary embodiment, an exemplary first heat transfer fluid may pass within inlet pipeline 210. In an exemplary embodiment, an exemplary second heat-transfer fluid may be heated in contact with an exemplary first heat-transfer fluid. In an exemplary embodiment, heating an exemplary second heat-transfer fluid may evaporate an exemplary second heat-transfer fluid. In an exemplary embodiment, heating an exemplary second heat-transfer fluid may cause an exemplary second heat-transfer fluid to become less dense. In an exemplary embodiment, an exemplary vaporized second heat-transfer fluid may rise within first closed-loop thermosiphon system 106 through supply pipeline 206 in direction 211. In an exemplary embodiment, a oneway valve may be installed through supply pipeline 206 allowing an exemplary second heattransfer fluid to move in one direction from first tubular coil 202 to second tubular coil 204 via supply pipeline 206. In an exemplary embodiment, an exemplary vaporized second heattransfer fluid may create a flow or siphoning effect, drawing cooler second heat-transfer fluid from a lower point in first closed-loop thermosiphon system 106. In an exemplary embodiment, an exemplary vaporized second heat-transfer fluid may pass through supply pipeline 206 toenter second tubular coil 204. In an exemplary embodiment, second tubular coil 204 may include a finned tubular coil. In an exemplary embodiment, an exemplary “finned tubular coil” may refer to second tubular coil 204 with a plurality of extended fins 213 attached to second tubular coil 204. In an exemplary embodiment, an exemplary plurality of fins 213 may be extended longitudinally along vertical axis 214. In an exemplary embodiment, a plurality of fins 213 may increase surface area of second tubular coil 204, allowing for more efficient heat transfer. In an exemplary embodiment, an exemplary produced steam may leave heater 108 via inner wall 212 in direction 218. In an exemplary embodiment, increasing surface area of second tubular coil 204 may enhance heat transfer between fresh air entering via direction 215 into heating system 102 and an exemplary second heat-transfer fluid. In an exemplary embodiment, an exemplary fresh air may be heated when passing over second tubular coil 204. In an exemplary embodiment, an exemplary vaporized first heat-transfer fluid may be condensed in contact with fresh air. In an exemplary embodiment, an exemplary first heat-transfer fluid may have a condensation temperature in a range of 10°C to 70°C. In an exemplary embodiment, an exemplary first heat-transfer fluid may have a condensation temperature in a range of -30°C to 1000°C. In an exemplary embodiment, an exemplary condensed second heat-transfer fluid may then move towards first tubular coil 202 via recycling pipeline 208 in direction 209 to be reheated, thus completing an exemplary cycle. In an exemplary embodiment, an exemplary second heat-transfer fluid may circulate in a closed circuit, continuously transferring heat energy between first tubular coil 202 and second tubular coil 204. In an exemplary embodiment, an exemplary closed-loop design may ensure efficient heat transfer while minimizing heat loss to surroundings. In an exemplary embodiment, supply pipeline 206 may be covered with a thermal-insulation layer 216. In an exemplary embodiment, thermalinsulation layer 216 may have thickness in a range of 1 mm to 3 cm. In an exemplary embodiment, thermal-insulation layer 216 may be made of at least one of polyurethane foams, polyethylene foams, expanded polystyrene, extruded polystyrene, phenolic foam, fiberglass, and combinations thereof. In an exemplary embodiment, an exemplary recycling may be repeated many times for at least decreasing temperature of an exemplary first heat-transfer fluid entering heater 108 via inlet pipeline 210 for harvesting waste heat steam of heating unit 104, heating fresh air entering heating unit 104 via an exemplary second passway, and combinations thereof.

[0063] In an exemplary embodiment, temperature of an exemplary first heat-transfer fluid entering heater 108 may be below dew point of an exemplary steam for achieving high efficiency in waste heat recovery heating system 102. In an exemplary embodiment, lowering an exemplary temperature of an exemplary first heat-transfer fluid may help to absorb steam heat of heater 108. In an exemplary embodiment, an exemplary cooled first heat-transfer fluid may absorb steam heat by condensing an exemplary steam. As used herein “dew point” may refer to a temperature at which air becomes saturated with moisture, leading to formation of dew, fog, or clouds. At an exemplary dew point temperature, air may hold as much water vapor as it can at a specific pressure and temperature, resulting in condensation. In an exemplary embodiment, excess moisture may begin to condense out of air as droplets or dew on surfaces when air continues to cool beyond an exemplary dew point.

[0064] In an exemplary embodiment, leveraging a latent heat of at least one of steam, an exemplary second heat-transfer fluid, and combinations thereof may enhance efficiency of waste heat recovery heating system 102. In an exemplary embodiment, an exemplary “Latent heat” may refer to a heat energy absorbed or released by at least one of steam, an exemplary second heat-transfer fluid, and combinations thereof during a phase change without a corresponding change in temperature. In an exemplary embodiment, an exemplary latent heat may imply a state of thermal equilibrium, where despite an exchange of heat, a temperature of at least one of steam, an exemplary second heat transfer fluid, and combinations thereof may remain constant during phase change. In an exemplary embodiment, an exemplary latent heat may refer to an amount of heat energy absorbed or released when at least one of steam, an exemplary second heat transfer fluid, and combinations thereof may change between liquid and gas states (or vice versa) at constant temperature. In an exemplary embodiment, leveraging a latent heat of an exemplary second heat-transfer fluid may reduce an exemplary second heattransfer fluid volume. In an exemplary embodiment, a volume percent of an exemplary second heat-transfer fluid in a liquid state to first closed-loop thermosiphon system 106 may be in a range of 1% to 20%.

[0065] In an exemplary embodiment, first closed-loop thermosiphon system 106 may operate on a principle of natural convection to transfer heat. In an exemplary embodiment, natural convection may be a process by which heat transfer occurs due to movement of fluids (liquids or gases) caused by differences in density within an exemplary fluid itself. In an exemplary embodiment, an exemplary second heat-transfer fluid may become less dense and may tend torise when an exemplary second heat-transfer fluid is heated, while cooler, denser second heattransfer fluid may sink. In an exemplary embodiment, rising and sinking an exemplary second heat-transfer fluid may create a natural circulation pattern, with second heat-transfer fluid vapor moving upwards and condensed second heat-transfer fluid moving downwards. In an exemplary embodiment, volume of an exemplary second heat-transfer fluid required for heat transfer may be notably diminished through incorporation of at least one of forced convection within first closed-loop thermosiphon system 106, utilization of large surface areas of an exemplary plurality of fins 213, leveraging latent heat of an exemplary second heat-transfer fluid, and combinations thereof. In an exemplary embodiment, first closed-loop thermosiphon system 106 may necessitate less than 3% by weight of an exemplary second heat-transfer fluid compared to a standard condensing heating system utilizing water in a liquid state, while still transferring the same amount of heat. In an exemplary embodiment, first closed-loop thermosiphon system 106 may enable extension of heating system 102 usage to nearly any location. In an exemplary embodiment, first closed-loop thermosiphon system 106 may operate under a pressure in a range of 1 pa to 10 Mpa. In an exemplary embodiment, an exemplary second heat-transfer fluid may have a condensation temperature in a range of 10°C to 70°C. In an exemplary embodiment, an exemplary first heat-transfer fluid may have a condensation temperature in a range of -30°C to 1000°C. In an exemplary embodiment, internal pressure of first closed-loop thermosiphon system 106 may be adjusted according to a condensation temperature required.

[0066] FIG. 2B illustrate a cross sectional view 220 of first close-loop thermosiphon system 106, consistent with one or more exemplary embodiments of the present disclosure. In an exemplary embodiment, first tubular coil 202 may be placed within inlet pipeline 210. In an exemplary embodiment, first tubular coil 202 may be dipped within an exemplary first heattransfer fluid. In an exemplary embodiment, an exemplary first heat-transfer fluid within inlet pipeline 210 may have a temperature in a range of 30°C to 70°C. In an exemplary embodiment, an exemplary second heat-transfer fluid within first close-loop thermosiphon system 106 may be heated in contact with an exemplary first heat-transfer fluid. In an exemplary embodiment, an exemplary second heat-transfer fluid may be vaporized within close-loop thermosiphon system 106. In an exemplary embodiment, first close-loop thermosiphon system 106 may have an internal pressure in a range of 1 pa to 10 Mpa. In an exemplary embodiment, an exemplary vaporized second heat-transfer fluid may rise within first closed-loop thermosiphon system 106via supply pipeline 206. In an exemplary embodiment, an exemplary vaporized second heattransfer fluid may enter second tubular coil 204 via supply pipeline 206. In an exemplary embodiment, second tubular coil 204 may include a plurality of fins 213 extending longitudinally along vertical axis 214. In an exemplary embodiment, an exemplary plurality of fins 213 may enhance heat exchange of an exemplary vaporized second heat transfer fluid with fresh air entering heating system 102. In an exemplary embodiment, second tubular coil 204 may be placed between inner wall 112 and outer wall 110. In an exemplary embodiment, second tubular coil 204 may encircle inner wall 112. In an exemplary embodiment, an exemplary vaporized second heat transferring fluid may be condensed within second tubular coil 204. In an exemplary embodiment, an exemplary condensed second heat-transfer fluid may return back into first tubular coil 202 via recycling pipeline 208. In an exemplary embodiment, first closed-loop thermosiphon system 106 may be used for at least one of decreasing temperature of an exemplary first heat-transfer fluid entering heater 108, increasing temperature of fresh air when entering through an exemplary second passway in direction 215, and combinations thereof.

[0067] FIG. 3A illustrates a perspective view 300 of second closed-loop thermosiphon system 301, consistent with one or more exemplary embodiments of the present disclosure. In an exemplary embodiment, second closed-loop thermosiphon system 301 may include a first tubular coil 303, a second tubular coil 302, a supply pipeline 306, and a recycling pipeline 308. In an exemplary embodiment, first tubular coil 303 may be placed within a sewage outlet of a bathroom pipeline. In an exemplary embodiment, first tubular coil 303 may be dipped within fluid waste of an exemplary bathroom. In an exemplary embodiment, second tubular coil 302 may be placed within an inlet water pipeline 304. In an exemplary embodiment, water may enter inlet water pipeline 304 via direction 309. In an exemplary embodiment, inlet water pipeline 304 may be used for providing water for an exemplary bathroom usage. In an exemplary embodiment, inlet water pipeline 304 may be widened in a place of installing second tubular coil 302 for preventing pipeline blockage. In an exemplary embodiment, first tubular coil 303 may be heated in contact with an exemplary fluid waste. In an exemplary embodiment, a predetermined volume of an exemplary second heat-transfer fluid may be added into second closed-loop thermosiphon system 301. In an exemplary embodiment, a volume percent of an exemplary second heat-transfer fluid to second closed-loop thermosiphon system 301 may be in a range of 1% to 20%. In an exemplary embodiment, second closed-loop thermosiphonsystem 301 may have an internal pressure in a range of 1 pa to 10 Mpa. In an exemplary embodiment, an exemplary vaporized second heat-transfer fluid may enter second tubular coil 302 via supply pipeline 306 in direction 310. In an exemplary embodiment, supply pipeline 306 may be covered with a thermal-insulation layer 305. In an exemplary embodiment, thermal-insulation layer 305 may include at least one of at least one of polyurethane foams, polyethylene foams, expanded polystyrene, extruded polystyrene, phenolic foam, fiberglass, and combinations thereof. In an exemplary embodiment, thermal-insulation layer 305 may be used for preserving heat of an exemplary vaporized heat transferring fluid passing through supply pipeline 306. In an exemplary embodiment, thermal-insulation layer 305 may have a thickness in a range of 1 mm to 3 cm. In an exemplary embodiment, an exemplary second heattransfer fluid may be condensed when passing second tubular coil 302. In an exemplary embodiment, an exemplary inlet water may be heated in contact with second tubular coil 302. In an exemplary embodiment, an exemplary vaporized second heat-transfer fluid may be condensed at a temperature in a range of 10°C to 70°C. In an exemplary embodiment, an exemplary condensed second heat-transfer fluid may return into first tubular coil 303 via recycling pipeline 308 in direction 311. In an exemplary embodiment, second closed-loop thermosiphon system 301 may be used for harvesting waste heat of an exemplary waste fluid of an exemplary bathroom. In an exemplary embodiment, an exemplary second heat-transfer fluid may include at least one of water, alcohols, a refrigerant, and combinations thereof. In an exemplary embodiment, an exemplary refrigerant may include at least one of hydrochlorofluorocarbons, hydrofluorocarbons, hydrofluoroolefms, and combinations thereof. In an exemplary embodiment, second closed-loop thermosiphon system 301 may operate with at least one external power source when first tubular coil 303 may be placed in a same height or higher than second tubular coil 302. In an exemplary embodiment, an exemplary at least one external power source may be placed through recycling pipeline 308.

[0068] FIG. 3B illustrates a cross-sectional view 310 of second closed-loop thermosiphon system 301, consistent with one or more exemplary embodiments of the present disclosure. In an exemplary embodiment, second closed-loop thermosiphon system 301 may include a first tubular coil 303, second tubular coil 302, supply pipeline 306, and a recycling pipeline 308. In an exemplary embodiment, second closed-loop thermosiphon system 301 may be used for harvesting waste heat of an appliance. In an exemplary embodiment, an exemplary appliance may include bathroom pipeline. In an exemplary embodiment, supply pipeline 306 may becovered with a thermal-insulation layer 305. In an exemplary embodiment, thermal-insulation layer 305 may include at least one polyurethane foams, polyethylene foams, expanded polystyrene, extruded polystyrene, phenolic foam, fiberglass, and combinations thereof. In an exemplary embodiment, thermal insulation layer 305 may be utilized to conserve heat of an exemplary vaporized second heat-transfer fluid as an exemplary vaporized second heat-transfer fluid passes through supply pipeline 306. In an exemplary embodiment, thermal-insulation layer 305 may have a thickness in a range of 1 mm to 3 cm.

[0069] FIG. 4A illustrates a perspective view 400 of a third closed-loop thermosiphon system 401, consistent with one or more exemplary embodiments of the present disclosure. In an exemplary embodiment, third closed-loop thermosiphon system 401 may be used for harvesting waste heat of a dryer. In an exemplary embodiment, an exemplary dryer may produce hot air for drying clothes. In an exemplary embodiment, closed loop thermosiphon 401 may be used to harvest heat from fumes out going from large scale industries including corrosive resistant steel industry, cement industry, and nuclear reactors. In an exemplary embodiment, closed loop thermosiphon 401 may recover large amount of wasted water as a by-product. In an exemplary embodiment, an exemplary harvested energy may be used to feed absorption chillers or heat up the incoming ambient temperature air. In an exemplary embodiment, third closed loop thermosiphon system 401 may include a first tubular coil 412, a second tubular coil 404, a recycling pipeline 408, and a supply pipeline 406. In an exemplary embodiment, an exemplary second heat-transfer fluid may be added within third closed-loop thermosiphon system 401. In an exemplary embodiment, third closed-loop thermosiphon system 401 may have an internal pressure in a range of 1 pa to 10 Mpa to establish a desired condensation temperature of the second heat-transfer fluid. In an exemplary embodiment, an exemplary dryer may include a double-walled air exchanger. In an exemplary embodiment, an exemplary double-walled air exchanger may include inner wall 415 and outer wall 416. In an exemplary embodiment, inner wall 415 may be housed within outer wall 416. In an exemplary embodiment, fresh air may enter an exemplary dryer through a space between inner wall 415 and outer wall 416 in direction 413. In an exemplary embodiment, hot air may exit an exemplary dryer through internal space of inner wall 415 in direction 414. In an exemplary embodiment, second tubular coil 404 may be placed between inner wall 415 and outer wall 416. In an exemplary embodiment, second tubular coil 404 may encircle inner wall 415. In an exemplary embodiment, second tubular coil 404 may include a first plurality of fins 402. In anexemplary embodiment, an exemplary first plurality of fins 402 may be extended longitudinally along vertical axis 411. In an exemplary embodiment, an exemplary first plurality of fins 402 may increase surface area of second tubular coil 404. In an exemplary embodiment, first tubular coil 412 may be placed in an exemplary internal space of inner wall 415. In an exemplary embodiment, first tubular coil 412 may be heated in contact with hot air exiting through direction 414 from an exemplary dryer. In an exemplary embodiment, first tubular coil 404 may include a second plurality of fins 410. In an exemplary embodiment, an exemplary second plurality of fins 410 may be extended longitudinally along vertical axis 411. In an exemplary embodiment, an exemplary second plurality of fins 410 may increase surface area of first tubular coil 412. In an exemplary embodiment, an exemplary hot air exiting an exemplary dryer in direction 414 may have a temperature in a range of 30°C to 90°C. In an exemplary embodiment, an exemplary second heat transfer fluid within first tubular coil 412 may be heated in contact with an exemplary hot air. In an exemplary embodiment, an exemplary vaporized second heat-transferring fluid may rise within supply pipeline 406. In an exemplary embodiment, supply pipeline 406 may be covered with a thermal-insulation layer 407. In an exemplary embodiment, thermal-insulation layer 407 may include at least one of polyurethane foams, polyethylene foams, expanded polystyrene, extruded polystyrene, phenolic foam, fiberglass, and combinations thereof. In an exemplary embodiment, thermal-insulation layer 407 may be used for preserving heat of an exemplary vaporized second heat-transfer fluid passing through supply pipeline 406. In an exemplary embodiment, thermal -insulating layer 407 may have a thickness in a range of 1 mm to 3 cm. In an exemplary embodiment, an exemplary vaporized second heat-transfer fluid may enter second tubular coil 404 via supply pipeline 406. In an exemplary embodiment, an exemplary second heat-transferring fluid within second tubular coil 404 may be cooled in contact with an exemplary fresh air entering into an exemplary dryer. In an exemplary embodiment, an exemplary fresh air entering through direction 413 may cool an exemplary vaporized heat-transfer fluid. In an exemplary embodiment, an exemplary vaporized second heat-transfer fluid may be condensed in contact with an exemplary fresh air. In an exemplary embodiment, an exemplary second heat-transfer fluid may return to first tubular coil 412 via recycling pipeline 408 for repeating an exemplary cycle. In an exemplary embodiment, an exemplary fresh air entering through direction 413 may be heated passing over second tubular coil 404. In an exemplary embodiment, third closed loop thermosiphon system 401 may be used for harvesting waste heat of an exemplary dryer. In anexemplary embodiment, an exemplary waste heat may heat an exemplary fresh air entering in direction 413. In an exemplary embodiment, an exemplary second heat-transfer fluid may include at least one of water, alcohols, a refrigerant, and combinations thereof. In an exemplary embodiment, an exemplary refrigerant may include at least one of hydrochlorofluorocarbons, hydrofluorocarbons, hydrofluoroolefms, and combinations thereof.

[0070] FIG. 4B illustrates a cross-sectional view 420 of third closed loop thermosiphon system 401, consistent with one or more exemplary embodiments of the present disclosure. In an exemplary embodiment, an exemplary third closed loop thermosiphon system 401 may include first tubular coil 412, second tubular coil 404, supply pipeline 406, recycling pipeline 408, an exemplary second heat-transfer fluid. In an exemplary embodiment, third closed loop thermosiphon system 401 may be used for harvesting waste heat of an exemplary dryer. In an exemplary embodiment, an exemplary dryer may include a double-walled air exchanger. In an exemplary embodiment, an exemplary double-walled air exchanger may include inner wall 415, and outer wall 416. In an exemplary embodiment, inner wall 415 may be housed within outer wall 416. In an exemplary embodiment, an exemplary second heat-transfer fluid may be added within third closed loop thermosiphon system 401. In an exemplary embodiment, an exemplary second heat-transfer fluid may be used for transferring heat of an exemplary hot air exiting an exemplary dryer to an exemplary fresh air entering an exemplary dryer. In an exemplary embodiment, an exemplary second heat-transfer fluid within first tubular coil 412 may be heated in contact with an exemplary hot air. In an exemplary embodiment, an exemplary second heat-transfer fluid may be vaporized. In an exemplary embodiment, an exemplary vaporized second heat-transfer fluid may enter second tubular coil 404 via supply pipeline 406. In an exemplary embodiment, an exemplary vaporized second heat-transfer fluid may be condensed in contact with an exemplary fresh air entering an exemplary dryer. In an exemplary embodiment, an exemplary second heat-transfer fluid may return into first tubular coil 412 via recycling pipeline 408 for repeating an exemplary cycle. In an exemplary embodiment, supply pipeline 406 may be covered with thermal-insulation layer 407. In an exemplary embodiment, an exemplary thermal-insulation layer 407 may have a thickness in a range of 1 mm to 3 cm. In an exemplary embodiment, thermal-insulation layer 407 may be made of at least one of polyurethane foams, polyethylene foams, expanded polystyrene, extruded polystyrene, phenolic foam, fiberglass, and combinations thereof. In an exemplary embodiment, third closed loop thermosiphon system 401 may be made of at least one of copper,corrosive resistant steel, aluminum, titanium, and combinations thereof. In an exemplary embodiment, third closed loop thermosiphon system 401 made of at least one of aluminum, copper, and combinations thereof may be covered with an anti -corrosion layer. In an exemplary embodiment, an exemplary anti-corrosion layer may include at least one of Teflon coatings, ceramic coatings, and combinations thereof.

[0071] FIG. 5 illustrates a perspective view 500 of a fourth closed-loop thermosiphon system 501, consistent with one or more exemplary embodiments of the present disclosure. In an exemplary embodiment, fourth closed-loop thermosiphon system 501 may include a first tubular coil 502, a second tubular coil 512, a supply pipeline 510, a recycling pipeline 508, and an exemplary second heat-transfer fluid. In an exemplary embodiment, an exemplary second heat-transfer fluid may be added within first tubular coil 502, second tubular coil 512, supply pipeline 510, and recycling pipeline 508. In an exemplary embodiment, fourth closed-loop thermosiphon system 501 may be used for harvesting waste heat of at least one of a washing machine, a dish washer, a sink pipeline, public buildings, and combinations thereof. In an exemplary embodiment, first tubular coil 502 may be placed within an outlet pipeline 506. In an exemplary embodiment, outlet pipeline 506 may be widened where first tubular coil 502 is placed. In an exemplary embodiment, increasing a diameter of outlet pipeline 506 in a section 504 where first tubular coil 502 is located may prevent outlet pipeline 506 from getting blocked. In an exemplary embodiment, an exemplary second heat-transfer fluid may be used for transferring heat of a fluid waste of an exemplary at least one of an exemplary washing machine, an exemplary dish washer, an exemplary sink pipeline, an exemplary public buildings’ sewage, and combinations thereof to a corresponding inlet feed of an exemplary washing machine, an exemplary dish washer, an exemplary sink pipeline, an exemplary public building’s water inlet, an exemplary absorption chiller, and combinations thereof. In an exemplary embodiment, an exemplary second heat-transfer fluid may be heated within first tubular coil 502 in contact with an exemplary fluid waste. In an exemplary embodiment, an exemplary second heat-transfer fluid may be vaporized. In an exemplary embodiment, an exemplary second heat-transfer fluid may be vaporized inside fourth closed-loop thermosiphon system 501. In an exemplary embodiment, performance of fourth closed-loop thermosiphon system 501 may be based on matter state change and use of latent heat for transferring heat.

[0072] In an exemplary embodiment, an exemplary vaporized second heat-transfer fluid may enter second tubular coil 512 via supply pipeline 510 in direction 514. In an exemplaryembodiment, an exemplary vaporized second heat-transfer fluid may be condensed in contact with an exemplary feed inlet. In an exemplary embodiment, an exemplary second heat-transfer fluid may return into first tubular coil 502 via recycle pipeline 508 in direction 515 for repeating an exemplary cycle. In an exemplary embodiment, supply pipeline 510 may be covered with a thermal-insulation layer 516. In an exemplary embodiment, thermal-insulation layer 516 may have a thickness in a range of 1 mm to 3 cm. In an exemplary embodiment, thermal-insulation layer 516 may include at least one of polyurethane foams, polyethylene foams, expanded polystyrene, extruded polystyrene, phenolic foam, fiberglass, and combinations thereof. In an exemplary embodiment, fourth closed loop thermosiphon system 501 may be made of at least one of copper, corrosive resistant steel, aluminum, titanium, and combinations thereof. In an exemplary embodiment, fourth closed loop thermosiphon system 501 made of at least one of aluminum, copper, and combinations thereof may be covered with an anti-corrosion layer. In an exemplary embodiment, an exemplary anti-corrosion layer may include at least one of Teflon coatings, ceramic coatings, and combinations thereof. In an exemplary embodiment, second tubular coil 512 may be placed within an inlet pipeline 513. In an exemplary embodiment, inlet pipeline 513 may be widened where second tubular coil 512 is placed. In an exemplary embodiment, increasing a diameter of inlet pipeline 513 in a section 511 where second tubular coil 512 is located may prevent inlet pipeline 513 from getting blocked. In an exemplary embodiment, fourth closed loop thermosiphon system 501 may be used for harvesting waste heat of at least one of an exemplary washing machine, an exemplary dishwasher, an exemplary sink pipeline, and combinations thereof.

[0073] In another exemplary embodiment, an exemplary second heat-transfer fluid may be used to heat an exemplary road surface. In an exemplary embodiment, an exemplary second tubular coil may be placed below an exemplary road surface. In an exemplary embodiment, heating an exemplary road surface may prevent freezing of an exemplary road surface. In an exemplary embodiment, an exemplary second heat-transfer fluid may transfer waste heat of an exemplary at least one appliance to an exemplary second tubular coil. In another exemplary embodiment, an exemplary second heat-transfer fluid may be used to preheat fluid used in central heating systems of at least one of private, public buildings, metros, malls, and combinations thereof.

[0074] In an exemplary embodiment, first closed-loop thermosiphon system 106, second closed-loop thermosiphon system 301, third closed-loop thermosiphon system 401, and fourthclosed-loop thermosiphon system 501 may be interconnected with each other via a plurality of connection pipelines. In an exemplary embodiment, a plurality of first closed-loop thermosiphon system 106 may be interconnected to each other using an exemplary plurality of connection pipelines. In an exemplary embodiment, a plurality of second closed-loop thermosiphon system 301 may be interconnected to each other using an exemplary plurality of connection pipelines. In an exemplary embodiment, a plurality of third closed-loop thermosiphon system 401 may be interconnected to each other using an exemplary plurality of connection pipelines. In an exemplary embodiment, a plurality of fourth closed-loop thermosiphon system 501 may be interconnected to each other using an exemplary plurality of connection pipelines. In an exemplary embodiment, a plurality of first closed-loop thermosiphon system 106, second closed-loop thermosiphon system 301, third closed-loop thermosiphon system 401, and fourth closed-loop thermosiphon system 501 may be interconnected to each other using an exemplary plurality of connection pipelines. In an exemplary embodiment, connecting an exemplary plurality of closed-loop thermosiphon systems may help collecting waste heat of an exemplary plurality of appliances at a same time and using an exemplary collected waste heat in at least one of an exemplary inlet feed of an exemplary plurality of appliances, road surface, and combinations thereof.

[0075] FIG. 6A illustrates a perspective view 600 of fifth closed-loop thermosiphon system 602 installed on the ground, consistent with one or more exemplary embodiments of the present disclosure. In an exemplary embodiment, fifth closed-loop thermosiphon system 602 may be used for recovering waste heat from the earth and for removing heat from the buildings or systems on the earth in order to cooling them down whether for the comfort of people or for industrial needs. In an exemplary embodiment, fifth closed-loop thermosiphon system 602 may include at least one first tubular coil 610 immersed within a water container 608. In an exemplary embodiment, at least one first tubular coil 610 may include a plurality of fins 611 attached to an exemplary at least one first tubular coil 610. In an exemplary embodiment, an exemplary plurality of fins 611 may be extended longitudinally along a vertical axis 617. In an exemplary embodiment, water container 608 may serve as a cooling source. In an exemplary embodiment, water container 608 may include a water inlet 606 and a water outlet 604. In an exemplary embodiment, fifth closed-loop thermosiphon system 602 made of at least one of aluminum, copper, and combinations thereof may be covered with an anti-corrosion layer. Inan exemplary embodiment, an exemplary anti-corrosion layer may include at least one of Teflon coatings, ceramic coatings, and combinations thereof.

[0076] In an exemplary embodiment, fifth closed-loop thermosiphon system 602 may include at least one second tubular coil 612. In an exemplary embodiment, an exemplary at least one second tubular coil 612 may be situated at a height with a temperature of maximum 3°C. In an exemplary embodiment, at least one second tubular coil 612 may be supported by a balloon 619 in the sky. In an exemplary embodiment, balloon 619 may be filled with at least one of helium, hydrogen, hot gases, and combinations thereof. In an exemplary embodiment, at least one second tubular coil 612 may include a plurality of fins 613. In an exemplary embodiment, plurality of fins 613 may be extended longitudinally along vertical axis 617. In an exemplary embodiment, a first end of at least one first coil 610 may be interconnected to a first end of at least one second coil 612 via at least one supply pipeline 614. In an exemplary embodiment, a second end of an exemplary at least one first coil 610 may be interconnected to a second end of at least one second coil 612 via at least one recycling pipeline 616. In an exemplary embodiment, supply pipeline 614 may be covered with a thermal insulation layer 615. In an exemplary embodiment, thermal insulation layer 615 may include at least one polyurethane foams, polyethylene foams, expanded polystyrene, extruded polystyrene, phenolic foam, fiberglass, and combinations thereof. In an exemplary embodiment, fifth closed-loop thermosiphon system 602 may include a heat-transfer fluid circulating within fifth closed-loop thermosiphon system 602. In an exemplary embodiment, a volume percent of an exemplary heat-transfer fluid in a liquid state to fifth closed-loop thermosiphon system 602 may be in a range of 1% to 20%. In an exemplary embodiment, fifth closed-loop thermosiphon system 602 may have an internal pressure in a range of 1 pa to 10 Mpa. In an exemplary embodiment, an exemplary heat-transfer fluid may include fluids with low condensation temperature and high vaporizing latent heat.

[0077] In an exemplary embodiment, an exemplary heat transfer fluid within at least one first coil 610 may be evaporated in contact with water inside water container 608. An exemplary heat transfer fluid may rise through supply pipeline 614 and reach second pipeline 612. In an exemplary embodiment, an exemplary heat transfer fluid may be condensed within second tubular coil 612 in contact with cold air at a height with a temperature of maximum 3°C. In an exemplary embodiment, an exemplary condensed heat-transfer fluid may sink back to first tubular coil 610 for repeating an exemplary cycle. In an exemplary embodiment, an exemplaryevaporation of an exemplary heat-transfer fluid within first tubular coil 610 may absorb heat of water within water container 608. In an exemplary embodiment, an exemplary water may be flowing water. In an exemplary embodiment, cooling water within water container 608 may decrease temperature of water within water container 608. In an exemplary embodiment, an exemplary flowing water may enter water container 608 via water inlet 606. In an exemplary embodiment, an exemplary flowing water may exit water container 608 via water outlet 604. In an exemplary embodiment, an exemplary flowing water may be used as a cooled water source for at least one of urban use, industrial use, and combinations thereof.

[0078] FIG. 6B illustrates a perspective view 620 of fifth closed-loop thermosiphon system 602, consistent with one or more exemplary embodiments of the present disclosure. In an exemplary embodiment, fifth closed-loop thermosiphon system 602 may include at least one first tubular coil 610. In an exemplary embodiment, first tubular coil 610 may include a plurality of fins 611 extended longitudinally along vertical axis 617. In an exemplary embodiment, fifth closed-loop thermosiphon system 602 may include at least one second tubular coil 612. In an exemplary embodiment, at least one second tubular coil 612 may include a plurality of fins 613 extended longitudinally along vertical axis 617. In an exemplary embodiment, a first end 621 of at least one first coil 610 may be interconnected to a first end 622 of at least one second coil 612 via at least one supply pipeline 614. In an exemplary embodiment, a second end 624 of an exemplary at least one first coil 610 may be interconnected to a second end 623 of at least one second coil 612 via at least one recycling pipeline 616.

[0079] FIG. 6C illustrates a perspective view 630 of at least one first tubular coil 610 placed in water container 608, consistent with one or more exemplary embodiments of the present disclosure. In an exemplary embodiment, water container 608 may include water inlet 606 and water outlet 604.

[0080] FIG. 6D illustrates a closed-look view 630 of first tubular coil 610 and second tubular coil 612, consistent with one or more exemplary embodiments of the present disclosure. In an exemplary embodiment, first tubular coil 610 may include at least one tubular coil. In an exemplary embodiment, second tubular coil 612 may include at least one tubular coil. In an exemplary embodiment, first tubular coil 610 may include a plurality of coaxial tubular coils. In an exemplary embodiment, an exemplary plurality of fins 611 may be connecting an exemplary plurality of first coaxial tubular coils 610 together. In an exemplary embodiment, second tubular coil 612 may include a plurality of coaxial tubular coils. In an exemplaryembodiment, an exemplary plurality of fins 613 may be connecting an exemplary plurality of second coaxial tubular coils 612 together.

[0081] Industrial Applicability

[0082] The present disclosure introduces a groundbreaking innovation with profound industrial applicability, utilizing a cost-effective design to significantly enhance the efficiency of condensation heating systems. It offers the potential to recover waste heat from various sources such as heating systems, dishwashers, washing machines, bathroom pipelines, sink pipelines, and their combinations, thus capturing and repurposing this otherwise lost energy. This innovative approach represents a critical breakthrough in energy management, applicable across a spectrum of appliances. An exemplary thermosiphon system not only optimizes heating processes but also offers a solution to harness excess heat generated during production. Its versatility extends beyond immediate benefits, presenting an economically viable option for homes and large-scale industries alike, including cement and steel production. Moreover, this invention holds promise for harvesting heat from water bodies such as seas and oceans. With its potential for scalability and practicality, this disclosure stands poised to redefine energy utilization standards, promoting sustainable practices while reducing operational expenses in various home and industrial settings.

[0083] While the foregoing has described what are considered to be the best mode and / or other examples, it is understood that various modifications may be made therein and that the subject matter disclosed herein may be implemented in various forms and examples, and that the teachings may be applied in numerous applications, only some of which have been described herein. It is intended by the following claims to claim any and all applications, modifications and variations that fall within the true scope of the present teachings.

[0084] Unless otherwise stated, all measurements, values, ratings, positions, magnitudes, sizes, and other specifications that are set forth in this specification, including in the claims that follow, are approximate, not exact. They are intended to have a reasonable range that is consistent with the functions to which they relate and with what is customary in the art to which they pertain.

[0085] The scope of protection is limited solely by the claims that now follow. That scope is intended and should be interpreted to be as broad as is consistent with the ordinary meaning of the language that is used in the claims when interpreted in light of this specification and the prosecution history that follows and to encompass all structural and functional equivalents.Notwithstanding, none of the claims are intended to embrace subject matter that fails to satisfy the requirement of Sections 101, 102, or 103 of the Patent Act, nor should they be interpreted in such a way. Any unintended embracement of such subject matter is hereby disclaimed.

[0086] Except as stated immediately above, nothing that has been stated or illustrated is intended or should be interpreted to cause a dedication of any component, step, feature, object, benefit, advantage, or equivalent to the public, regardless of whether it is or is not recited in the claims.

[0087] It will be understood that the terms and expressions used herein have the ordinary meaning as is accorded to such terms and expressions with respect to their corresponding respective areas of inquiry and study except where specific meanings have otherwise been set forth herein. Relational terms such as first and second and the like may be used solely to distinguish one entity or action from another without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms “comprises,” “comprising,” or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by “a” or “an” does not, without further constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0088] The Abstract of the Disclosure is provided to allow the reader to quickly ascertain the nature of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. In addition, in the foregoing Detailed Description, it can be seen that various features are grouped together in various implementations. This is for purposes of streamlining the disclosure, and is not to be interpreted as reflecting an intention that the claimed implementations require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter lies in less than all features of a single disclosed implementation. Thus, the following claims are hereby incorporated into the Detailed Description, with each claim standing on its own as a separately claimed subject matter.

[0089] While various implementations have been described, the description is intended to be exemplary, rather than limiting and it will be apparent to those of ordinary skill in the art that many more implementations and implementations are possible that are within the scope of theimplementations. Although many possible combinations of features are shown in the accompanying figures and discussed in this detailed description, many other combinations of the disclosed features are possible. Any feature of any implementation may be used in combination with or substituted for any other feature or element in any other implementation unless specifically restricted. Therefore, it will be understood that any of the features shown and / or discussed in the present disclosure may be implemented together in any suitable combination. Accordingly, the implementations are not to be restricted except in light of the attached claims and their equivalents. Also, various modifications and changes may be made within the scope of the attached claims.

Claims

What is claimed is:

1. A waste heat recovery heating system with improved efficiency, comprising: a heating unit, comprising: one heater; one inlet pipeline connected to the heater, the inlet pipeline allowing passage of a first heat-transfer fluid there within toward the heater; one outlet pipeline connected to the heater, the outlet pipeline allowing a heated first heat-transfer fluid to exit the heater; and one two-walled gas outlet connected to the heater, the two-walled gas outlet comprising: one inner wall forming a first passway for exiting burnt gases from the heater; and one outer wall, the inner wall housed within the outer wall, a space between the inner wall and the outer wall forming a second passway for entering fresh air into the heater; and a closed-loop thermosiphon system for decreasing temperature of the first heattransfer fluid within the inlet pipeline, comprising: a first tubular coil placed within the inlet pipeline, the first tubular coil being dipped within the first heat-transfer fluid; a second tubular coil encircled the inner wall in contact with the fresh air, the first heat-transfer fluid having a temperature higher than a temperature of the fresh air; one supply pipeline connecting a first end of the first tubular coil to a first end of the second tubular coil;one recycling pipeline connecting a second end of the first tubular coil to a second end of the second tubular coil; and one second heat-transfer fluid circulating within the closed-loop thermosiphon system, wherein the cooled first heat-transfer fluid absorbs waste heat of combustion gases produced in the heater.

2. The waste heat recovery heating system of claim 1, wherein the second tubular coil comprises a plurality of fins connected to the second tubular coil, the plurality of fins extending longitudinally along a vertical axis of the two-walled gas outlet, the plurality of fins is made of at least one of corrosive resistant steel, copper, aluminum, titanium, and combinations thereof.

3. The waste heat recovery heating system of claim 1 , wherein a size ratio of a tube width diameter of the second tubular coil to a height of the second tubular coil along the vertical axis is at least 1 : 1 (tube width diameter of the second tubular coil : height of the second tubular coil) .

4. The waste heat recovery heating system of claim 1, wherein a size ratio of a tube width diameter of the second tubular coil to the second passway is in a range of 1:2 to 1: 10 (tube width diameter of the second tubular coil: the second passway).

5. The waste heat recovery heating system of claim 1, wherein the closed-loop thermosiphon system further comprises: one first one-way valve placed within the supply pipeline, forcing the second heat-transfer fluid to move in one direction from the first tubular coil to the secondtubular coil through the supply pipeline, the first tubular coil is positioned in a lower place in comparison to the second tubular coil; and one second one-way valve placed within the recycling pipeline forcing the second heat-transfer fluid to move in one direction from the second tubular coil to the first tubular coil through the recycling pipeline.

6. The waste heat recovery heating system of claim 5, wherein the supply pipeline comprises a thermal-insulation layer covering an external surrounding of the supply pipeline, the thermal-insulation layer is made of at least one of polyurethane foams, polyethylene foams, expanded polystyrene, extruded polystyrene, phenolic foam, fiberglass, and combinations thereof.

7. The waste heat recovery heating system of claim 1, wherein the closed loop thermosiphon system is made of at least one of corrosive resistant steel, aluminum, titanium, copper, and combinations thereof.

8. The waste heat recovery heating system of claim 1, wherein the closed loop thermosiphon system has an internal pressure in a range of 1 pa to 10 Mpa to establish a desired condensation temperature of the second heat-transfer fluid.

9. The waste heat recovery heating system of claim 1, wherein the second heat-transfer fluid has a condensation temperature in a range of 10°C to 70°C.

10. The waste heat recovery heating system of claim 1, wherein each of the first heattransfer fluid and the second heat-transfer fluid comprises at least one of water, alcohols, a refrigerant, and combinations thereof, the refrigerant comprising at least one of hydrochlorofluorocarbons, hydrofluorocarbons, hydrofluoroolefms, and combinations thereof.

11. The waste heat recovery heating system of claim 1, wherein a volume percent of the second heat-transfer fluid in a liquid state to the closed-loop thermosiphon system is in a range of 1% to 20%.

12. A closed-loop thermosiphon system for recovering waste heat of an appliance and / or natural heat waste, the closed-loop thermosiphon system comprising: one first tubular coil placed within a sewage outlet and / or under a sea / ocean, the first tubular coil being in contact with a fluid waste and / or the sea / ocean water with a sea / ocean water temperature of 4°C; one second tubular coil placed within an inlet pipeline of the appliance, the second tubular coil being in contact with an inlet feed; one supply pipeline connecting a first end of the first tubular coil to a first end of the second tubular coil; one recycling pipeline connecting a second end of the first tubular coil to a second end of the second tubular coil; and a heat-transfer fluid circulating within the closed-loop thermosiphon system, the first tubular coil is positioned in a lower place in comparison to the second tubular coil, a volume percent of the heat-transfer fluid in a liquid state to the closed-loop thermosiphon system is in a range of 1% to 20%, the closed-loop thermosiphon systemhas an internal pressure in a range of 1 pa to 10 Mpa to establish a desired condensation temperature of the second heat-transfer fluid.

13. The closed-loop thermosiphon system of claim 12, wherein the appliance comprises at least one of a heating unit, a washing machine, a dishwasher, a bathroom pipeline, a dryer, a sink pipeline, an absorption chiller, public buildings, large-scale industries, a large scale central heating system of a town, a public building, a single residence, and combinations thereof.

14. The closed-loop thermosiphon system of claim 12, further comprising: one first one-way valve placed within the supply pipeline, forcing the second heat-transfer fluid to move in one direction from the first tubular coil to the second tubular coil through the supply pipeline, the first tubular coil is positioned in a lower place in comparison to the second tubular coil; and one second one-way valve placed within the recycling pipeline forcing the second heat-transfer fluid to move in one direction from the second tubular coil to the first tubular coil through the recycling pipeline.

15. The closed-loop thermosiphon system of claim 14, wherein the supply pipeline comprises a thermal-insulation layer covering an external surrounding of the supply pipeline, the thermal-insulation layer comprises at least one of polyurethane foams, polyethylene foams, expanded polystyrene, extruded polystyrene, phenolic foam, fiberglass, and combinations thereof.

16. The closed-loop thermosiphon system of claim 12, wherein the fluid waste comprises at least one of vapor waste, liquid waste, solid waste, and combinations thereof, each comprising waste heat.

17. The closed-loop thermosiphon system of claim 12, wherein the inlet feed comprises at least one of vapor, a liquid, and combinations thereof.

18. The closed-loop thermosiphon system of claim 12, wherein the heat-transfer fluid comprises at least one of water, alcohols, a refrigerant, and combinations thereof, the refrigerant comprising at least one of hydrochlorofluorocarbons, hydrofluorocarbons, hydrofluoroolefms, and combinations thereof.

19. The closed-loop thermosiphon system of claim 12, further comprising a plurality of first tubular coils and a plurality of second tubular coils connecting to each other via a plurality of connection pipelines.

20. A closed-loop thermosiphon system for recovering waste heat of earth, comprising: at least one first tubular coil placed on the ground within a water container, the water container is filled with water, the at least one first tubular coil being in contact with water within the water container, the water container being used as a coolant source, the water container comprising: one water inlet; and one water outlet;at least one second tubular coil placed in a height with a temperature of maximum 3°C using a balloon fdled with at least one of helium, hydrogen, hot gases with lower density than air, and combinations thereof, the at least one second tubular coil comprising a plurality of fins extended longitudinally along a vertical axis; one supply pipeline connecting a first end of the at least one first tubular coil to a first end of the at least one second tubular coil, the supply pipeline comprising a thermal insulation layer covering external surrounding of the supply pipeline; one recycling pipeline connecting a second end of the at least one first tubular coil to a second end of the at least one second tubular coil; and a heat-transfer fluid circulating within the closed-loop thermosiphon system, a volume percent of the heat-transfer fluid in liquid state to the closed-loop thermosiphon system is in a range of 1% to 20%, the closed-loop thermosiphon system has an internal pressure in a range of 1 pa to 10 Mpa to establish a desired condensation temperature of the second heat-transfer fluid, wherein evaporation of the heat-transfer fluid within the at least one first tubular coil decreases temperature of water within the water container, the water comprising at least one of urban water, industrial water, and combinations thereof.

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