Ship waste heat comprehensive utilization device and method

Abstract

The invention discloses a ship waste heat comprehensive utilization device and method, and the device comprises a hot water tank which is heated by waste heat generated by a power system during ship navigation; the seawater desalination system is connected with the hot water tank; the cooling system is connected with the hot water tank and the seawater desalination system; the cabin dehumidification unit is connected with the hot water tank, the cabin dehumidification unit is used for adsorbing humid air in a cabin, the cabin dehumidification unit is connected with the air water taking device, and the air water taking device is connected with the cooling system; the cooling system and the cabin dehumidification unit are connected with the fan coil; wherein the hot water tank provides power for the seawater desalination system, the cooling system and the cabin dehumidification unit through heat energy. The temperature and humidity in the cabin can be driven and adjusted by utilizing the waste heat of the ship during the sailing period of the ship, and meanwhile, water in air is collected and seawater is desalted to generate fresh water.

Description

Technical Field

[0001] This invention relates to the field of ship systems technology, and in particular to a device and method for comprehensive utilization of waste heat from ships. Background Technology

[0002] In recent years, a significant amount of waste heat from ship propulsion systems has been discharged directly into the sea without being utilized, resulting in energy waste and thermal pollution. Simultaneously, some ship cabins experience extremely high heat and humidity loads, with temperatures typically exceeding 40°C and relative humidity even surpassing 80%, leading to extremely poor comfort levels and severely impacting the physical and mental health of crew members. Cooling and dehumidification are urgently needed. Furthermore, because ships operate far from land at sea, they lack freshwater supplies, and the limited space in ship cabins and the limited amount of freshwater they carry cannot meet the demands of extended working hours.

[0003] In existing ship systems, the refrigeration and dehumidification system and the freshwater production system are independent of each other. Furthermore, the traditional seawater distillation and desalination system consumes a lot of energy and has low energy efficiency, which is not conducive to the development of ships working at sea for extended periods of time.

[0004] To address the aforementioned technical issues, this invention provides a device and method for the comprehensive utilization of waste heat from ships. Summary of the Invention

[0005] The purpose of this invention is to provide a device and method for comprehensive utilization of waste heat from ships, so as to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a ship waste heat comprehensive utilization device, comprising: A hot water tank, wherein the hot water tank is heated by waste heat generated by the ship's power system during navigation; A seawater desalination system, wherein the seawater desalination system is connected to the hot water tank; A cooling system is provided, which is connected to the hot water tank and the seawater desalination system. The seawater desalination system is used to purify fresh water to replenish the water levels of the hot water tank and the cooling system. A cabin dehumidifier unit is connected to the hot water tank. The cabin dehumidifier unit is used to absorb humid air inside the cabin. The cabin dehumidifier unit is connected to an air water collector, which is connected to the cooling system. The fan coil unit is connected to both the cooling system and the cabin dehumidifier unit. The fan coil unit is used to cool the cabin using the chilled water generated by the cooling system and the cabin dehumidifier unit. The hot water tank provides power to the seawater desalination system, the cooling system, and the cabin dehumidification unit through thermal energy.

[0007] According to the waste heat utilization device for ships provided by the present invention, the cooling system includes an adsorption refrigeration unit and a cooling tower. The adsorption refrigeration unit can use the energy provided by the hot water tank to drive refrigeration to obtain chilled water, and the cooling tower extracts seawater to replenish the water level of the adsorption refrigeration unit.

[0008] According to the ship waste heat comprehensive utilization device provided by the present invention, the cabin dehumidification unit includes a rotary dehumidifier unit, which is connected to an air water collector through an air duct.

[0009] According to the ship waste heat comprehensive utilization device provided by the present invention, the temperature of the chilled water is 15℃-20℃; the temperature of the seawater supplied by the cooling tower to the adsorption refrigeration unit is 30℃.

[0010] According to the waste heat utilization device for ships provided by the present invention, the hot water in the hot water tank is heated and maintained at ≥75°C by the waste heat generated by the power system during the ship's navigation.

[0011] The waste heat utilization device for ships provided by the present invention further includes a control system, a temperature monitoring module, and a humidity monitoring module. The control system is used to control the operation of the overall device, and the temperature monitoring module and the humidity monitoring module are used to collect temperature and humidity information and transmit the information to the control system, respectively.

[0012] A method for comprehensive utilization of waste heat from ships includes the following steps: Step 1: Start the ship's propulsion system during navigation and use the waste heat generated during system operation to heat the water in the hot water tank, so that the hot water tank stores enough heat energy to provide power support for the operation of subsequent systems. Step two: The hot water tank delivers the stored heat energy to the seawater desalination system, cooling system and cabin dehumidification unit respectively. The heat energy supply drives the three systems to start synchronously and enter the standby state. Step 3: Driven by the heat energy provided by the hot water tank, the seawater desalination system starts the freshwater purification process to purify the seawater. After purification, qualified freshwater is delivered to the hot water tank and cooling system respectively to replenish the water level of both and ensure that they meet the water level requirements for normal operation. Step four: Driven by the heat energy of the hot water tank, the cabin dehumidifier unit starts working and removes humid air in the cabin through adsorption, improving the humidity environment of the cabin. At the same time, the air water extractor connected to the cabin dehumidifier unit starts simultaneously. With its connection to the cooling system, it works together to complete the air water extraction operation and assists in the efficient dehumidification process of the cabin. Step 5: With the support of the hot water tank's thermal energy and the fresh water replenishment from the seawater desalination system, the cooling system works in conjunction with the cabin dehumidification unit to generate chilled water. After the fan coil units are connected to the chilled water, the cooling capacity of the chilled water is transferred to the ship's cabins through a circulating heat exchange method, thereby cooling the cabins and improving the cabin temperature environment. Step six: Each system continues to operate in a cyclical manner. The hot water tank continuously replenishes heat energy through the waste heat of the ship's power system, the seawater desalination system replenishes fresh water in real time, and the cabin dehumidifier unit and fan coil unit work together to maintain the cabin temperature and humidity within a suitable range, ensuring the long-term stable operation of the equipment.

[0013] According to the ship waste heat comprehensive utilization method provided by the present invention, in step one, the hot water tank needs to be actively filled with water to a predetermined water level before heating.

[0014] The present invention discloses the following technical effects: This invention fully recovers waste heat emitted by the ship's power system, stores the heat energy in a hot water tank, and powers the seawater desalination system, cooling system, and cabin dehumidification unit, avoiding energy waste and thermal pollution caused by direct discharge of waste heat into the sea. It eliminates the need for additional fuel or other traditional energy sources to drive the various functional systems, significantly reducing ship energy costs, aligning with the trend of green shipping, reducing thermal impact on the marine environment, and achieving a win-win situation for energy utilization and environmental benefits.

[0015] This invention addresses the pain points of difficult freshwater replenishment and limited freshwater carrying capacity for ships at sea. The device uses waste heat to drive a seawater desalination system to generate freshwater, which can replenish the water level of the hot water tank and cooling system, ensuring the stable operation of the device itself, and also provide an additional freshwater supply for the ship. It eliminates the need for a separate, energy-intensive freshwater production unit, saving cabin installation space and operating energy consumption, effectively supporting long-term voyages far from land, and solving the limitation of insufficient freshwater supply on voyage endurance.

[0016] This invention utilizes a cabin dehumidifier to adsorb humid air, a cooling system that works in conjunction with fan coil units to generate chilled water for cooling, and an air humidifier to assist in dehumidification. This rapidly improves the high-temperature and high-humidity environment in cabins, regulating temperature and humidity to a comfortable range. It completely solves the problems of poor cabin comfort and negative impacts on crew health associated with traditional cabins, providing crew with a dry and comfortable working and resting environment, reducing health risks caused by hot and humid conditions, and ultimately improving crew focus and overall operational efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the waste heat utilization device for ships according to the present invention.

[0019] The components include: 1. Hot water tank; 2. Adsorption refrigeration unit; 3. Cooling tower; 4. Rotary dehumidifier unit; 5. Air water collector; 6. Seawater desalination system; 7. Fan coil unit; 8. Air duct. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Reference Figure 1 This invention provides a device for comprehensive utilization of waste heat from ships, comprising: Hot water tank 1 uses waste heat generated by the ship's propulsion system during navigation for heating; Seawater desalination system 6, which is connected to hot water tank 1; The cooling system is connected to the hot water tank 1 and the seawater desalination system 6. The seawater desalination system 6 is used to purify fresh water and replenish the water level of the hot water tank 1 and the cooling system. The cabin dehumidifier unit is connected to the hot water tank 1. The cabin dehumidifier unit is used to adsorb humid air in the cabin. The cabin dehumidifier unit is connected to the air water collector 5. The air water collector 5 is connected to the cooling system. Fan coil unit 7, cooling system and cabin dehumidifier are all connected to fan coil unit 7. Fan coil unit 7 is used to cool the cabin with chilled water generated by cooling system and cabin dehumidifier. Among them, the hot water tank 1 provides power to the seawater desalination system 6, the cooling system and the cabin dehumidification unit through thermal energy.

[0023] The scheme is further optimized. The cooling system includes an adsorption chiller unit 2 and a cooling tower 3. The adsorption chiller unit 2 can use the energy provided by the hot water tank 1 to drive the refrigeration to obtain chilled water. The cooling tower 3 extracts seawater to replenish the water level of the adsorption chiller unit 2.

[0024] The scheme has been further optimized. The cabin dehumidification unit includes a rotary dehumidifier unit 4, which is connected to the air water collector 5 through the air duct 8.

[0025] The scheme was further optimized so that the temperature of the chilled water was 15℃-20℃; the temperature of the seawater supplied by the cooling tower 3 to the adsorption refrigeration unit 2 was 30℃.

[0026] The solution is further optimized so that the hot water in the hot water tank 1 is heated and maintained at ≥75℃ by the waste heat generated by the power system during the ship's voyage.

[0027] Further optimization of the scheme also includes a control system, a temperature monitoring module, and a humidity monitoring module. The control system is used to control the operation of the overall device, while the temperature monitoring module and humidity monitoring module are used to collect temperature and humidity information and transmit the information to the control system.

[0028] A method for comprehensive utilization of waste heat from ships includes the following steps: Step 1: Start the ship's propulsion system during navigation and use the waste heat generated during system operation to heat the water in hot water tank 1, so that hot water tank 1 stores enough heat energy to provide power support for the operation of subsequent systems. Step 2: The hot water tank 1 transfers the stored heat energy to the seawater desalination system 6, the cooling system and the cabin dehumidifier unit respectively. The heat energy supply drives the three systems to start synchronously and enter the standby state. Step 3: Driven by the heat energy provided by the hot water tank 1, the seawater desalination system 6 starts the freshwater purification process to purify the seawater. After purification, qualified freshwater is delivered to the hot water tank 1 and the cooling system respectively to replenish the water level of both and ensure that they meet the water level requirements for normal operation. Step four: The cabin dehumidifier unit starts working under the thermal energy of the hot water tank 1, removing humid air in the cabin through adsorption and improving the humidity environment of the cabin; at the same time, the air water collector 5 connected to the cabin dehumidifier unit starts synchronously, and with the help of its connection with the cooling system, it completes the air water collection-related operations to assist in the efficient dehumidification process of the cabin. Step 5: With the support of the hot water tank 1 and the fresh water replenishment from the seawater desalination system 6, the cooling system works in conjunction with the cabin dehumidification unit to generate chilled water. After the fan coil unit 7 is connected to the chilled water, it transfers the cooling capacity of the chilled water to the ship's cabin through a circulating heat exchange method, thereby cooling the cabin and improving the cabin temperature environment. Step six: Each system continues to operate in a cycle according to the steps. Hot water tank 1 continuously replenishes heat energy through waste heat from the ship's power system, seawater desalination system 6 replenishes fresh water in real time, and cabin dehumidifiers and fan coil units 7 work together to maintain cabin temperature and humidity within a suitable range to ensure long-term stable operation of the equipment.

[0029] To further optimize the solution, in step one, the hot water tank 1 needs to actively fill water to the predetermined water level before heating.

[0030] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0031] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A ship waste heat comprehensive utilization device, characterized in that, The application relates to a ship cabin air conditioning system, which comprises the following parts: a hot water tank (1) heated by the waste heat generated by a power system during ship navigation; a seawater desalination system (6) connected with the hot water tank (1); a cooling system connected with the hot water tank (1) and the seawater desalination system (6), wherein the seawater desalination system (6) is used for purifying seawater to supplement the water levels of the hot water tank (1) and the cooling system; a cabin dehumidification unit connected with the hot water tank (1) and used for adsorbing humid air in a ship cabin, wherein the cabin dehumidification unit is connected with an air water extractor (5), and the air water extractor (5) is connected with the cooling system; a fan coil (7) connected with the cooling system and the cabin dehumidification unit, wherein the fan coil (7) is used for cooling the cabin by using the refrigerated water generated by the cooling system and the cabin dehumidification unit; wherein the hot water tank (1) provides power for the seawater desalination system (6), the cooling system and the cabin dehumidification unit by heat energy.

2. The ship waste heat comprehensive utilization device according to claim 1, characterized in that, The cooling system comprises an adsorption refrigeration unit (2) and a cooling tower (3), wherein the adsorption refrigeration unit (2) is driven to generate refrigerated water by using the energy provided by the hot water tank (1), and the cooling tower (3) extracts seawater to supplement the water level of the adsorption refrigeration unit (2).

3. The ship waste heat comprehensive utilization device according to claim 1, characterized in that, The cabin dehumidification unit comprises a rotary dehumidification unit (4) connected with the air water extractor (5) through an air duct (8).

4. The ship waste heat comprehensive utilization device according to claim 2, characterized in that, The temperature of the refrigerated water is 15-20 DEG C, and the temperature of the seawater supplied by the cooling tower (3) to the adsorption refrigeration unit (2) is 30 DEG C.

5. The ship waste heat comprehensive utilization device according to claim 1, characterized in that, The hot water in the hot water tank (1) is heated by the waste heat generated by the power system during ship navigation and maintained at greater than or equal to 75 DEG C.

6. The ship waste heat comprehensive utilization device according to claim 1, characterized in that, The application further comprises a control system, a temperature monitoring module and a humidity monitoring module, wherein the control system is used for controlling the operation of the whole device, and the temperature monitoring module and the humidity monitoring module are respectively used for collecting temperature and humidity information and transmitting the information to the control system.

7. A method for comprehensive utilization of waste heat of a ship, based on the comprehensive utilization device of waste heat of a ship according to any one of claims 1-6, characterized in that, The application further comprises the following steps: step one: starting the power system during ship navigation, heating the water in the hot water tank (1) by using the waste heat generated during the system operation, and storing sufficient heat energy in the hot water tank (1) to provide power support for the operation of the subsequent systems; step two: delivering the stored heat energy in the hot water tank (1) to the seawater desalination system (6), the cooling system and the cabin dehumidification unit, and driving the three systems to start synchronously by the heat energy supply to enter a standby working state; step three: starting the fresh water purification process to purify seawater under the driving of the heat energy provided by the hot water tank (1), and delivering the qualified fresh water to the hot water tank (1) and the cooling system to supplement the water levels of the two systems and ensure that the water levels meet the water level requirements of normal work. Step four, the cabin dehumidification unit starts to work under the heat energy of the hot water tank (1), removes the humid air in the cabin by adsorption, and improves the cabin humidity environment; at the same time, the air water extractor (5) connected with the cabin dehumidification unit is started synchronously, and the air water extraction related work is completed by means of the connection relationship with the cooling system, and the efficient cabin dehumidification process is assisted; Step five, the cooling system is driven by the heat energy of the hot water tank (1) and supplemented with fresh water by the seawater desalination system (6), and cooperates with the cabin dehumidification unit to produce chilled water; after the fan coil (7) is connected with the chilled water, the cold energy of the chilled water is transferred to the ship cabin through the circulating heat exchange mode, the cabin temperature is lowered, and the cabin temperature environment is improved; Step six, each system continues to operate according to the steps, the hot water tank (1) continuously supplements heat energy through the waste heat of the ship power system, the seawater desalination system (6) supplements fresh water in real time, the cabin dehumidification unit and the fan coil (7) cooperate to maintain the cabin temperature and humidity in the appropriate range, and the device can run stably for a long time.

8. The method according to claim 7, wherein, In step one, the hot water tank (1) needs to be actively filled with water to a predetermined water level before heating.

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