150results about "Central heating exchangers" patented technology

An air-conditioning apparatus has at least one intermediate heat exchanger that exchanges heat between a refrigerant changing in two phases or a refrigerant in a supercritical state and a heat medium such as water and anti-freezing fluid different from the refrigerant, a refrigeration cycle in which a compressor, a heat-source side heat exchanger, at least one expansion valve, and a refrigerant-side channel of the intermediate heat exchanger are connected via a pipeline through which the refrigerant flows, and a heat-medium circulation circuit in which a heat-medium side channel of the intermediate heat exchanger, a pump, and a use-side heat exchanger are connected via a pipeline through which the heat medium flows, in which in the heat-medium circulation circuit, a fourth temperature sensor that detects a temperature of the heat-medium flowing out of the use-side heat exchanger is provided, and leakage of the heat medium from the heat-medium circulation circuit is detected on the basis of a change amount of a detected temperature of the fourth temperature sensor.

The invention provides a method for directly feeding primary network returned water in the steam condenser as condensed water and a method for reducing the water outlet temperature of the condensed water of a steam condenser step by step, increasing the water supply temperature of a primary network step by step and improving the power generation efficiency and the heat supply effect. The method comprises a thermal power plant steam extraction heat supply system, a returned water temperature adjusting system, a thermal power plant steam condenser cooling water system and a high-temperature-difference heat supply primary pipe network.

The invention relates to a solar and ground source heat pump combined energy supply system and an operation control method thereof. The solar and ground source heat pump combined energy supply system is technically characterized by comprising a solar heat collecting system, a ground source heat pump system and a buried pipe system and being composed of plate heat exchangers, a pump set and switches. The operation control method of the solar and ground source heat pump combined energy supply system includes the steps of calculating equipment parameters of the solar and ground source heat pump combined energy supply system to construct the solar and ground source heat pump combined energy supply system, and carrying out operation control over the heat collecting process, the heat storing process and the heat supplementing process of the solar and ground source heat pump combined energy supply system. Hot water supply requiring time periods of domestic hot water requiring users are analyzed, and by controlling relevant switches and equipment, solar energy and a ground source heat pump are combined to supply energy; and heat in a solar heat collector can be conveyed into soil through the buried pipe heat exchanger system to conduct the heat supplementing process on the soil during time periods when the domestic hot water requiring users do not need hot water supply, and thus the soil thermal imbalance problem caused by long-term operation of an existing ground source heat pump is solved.

A storage hot water supplying apparatus which efficiently operates with largely increased available heat in a water storage tank is provided. The storage hot water supplying apparatus (1) provides heated water to a load circuit (300) through which users uses water, and includes: a water storage tank (210) which stores water and has outlets for water to be heated (231 to 233) at different heights, an outlet selecting unit (430) to select, from among the outlets (231 to 233), an outlet to take out the water, based on a provision temperature which is a temperature of water to be provided from the water storage tank (210) to the load circuit (300) and temperatures of the water to be taken out through the outlets (231 to 233); and a heating unit (100) to heat the water taken out through the selected outlet and to be returned to the water storage tank (210).

A cogeneration system includes a first cooling device disposed in a cooling water circulation path extending between an engine and a waste-heat heat exchanger, and a second cooling device disposed in a hot water circulation pipe extending between a hot water storage tank and a hot air heater. The first cooling device is activated to cool cooling water when the temperature of hot water stored in the hot water storage tank exceeds a first predetermined value, and the second cooling device is activated to cool the hot water when the temperature of hot air inside the hot air heater exceeds a second predetermined value.

A refrigeration cycle apparatus (50) includes: a main refrigerant circuit (21) having a compressor (1), a radiator (2), a first expansion mechanism (5), a second expansion mechanism (6), and an evaporator (4); an injection passage (22) for supplying an intermediate-pressure refrigerant to an injection port 1c of the compressor 1; and a water circuit (30) through which water to be heated in the radiator (2) flows. The refrigeration cycle apparatus (50) includes a sub heat exchanger (3) for cooling the water in the water circuit (30) by exchanging heat between the refrigerant in the injection passage (22) and the water to be heated in the radiator (2).

A heating and hot water supply apparatus is provided with a heat pump unit (2), a water storage tank (1), a heat exchanger (10) in the water tank and pipe lines (31, 32). Hot water stored in the water storage tank (1) by being guided by the pipe line (32) passes through a radiator (30) outside the water storage tank (1), then returns into the storage tank (1) by being guided by the pipe line (31) for circulation. Thus, the radiator (30) can directly use heat of large quantity hot water stored in the water storage tank (1).

A hot water storage type hot water supply device is capable of heating water inside a hot water storage tank appropriately, thereby preventing energy waste. A circulating pump is operated and a burner is incinerated, when the average of detected temperatures from water temperature detectors falls below a predetermined lower limit temperature. The burner is extinguished when an accumulated heating amount from the beginning of operation of a heat source equipment becomes equal to or more than a target heating amount necessary for elevating the total amount of water in the hot water storage tank to a preset hot water delivery temperature. The circulating pump is continuously operated after extinguishing the burner, until an accumulated circulated water amount of a circulating path becomes equal to or more than a predetermined water amount set to be equal to or more than a capacity of the hot water storage tank.

The invention relates to a floor drain comprising a drain compartment having a bottom, at least one side and an open upper portion. The bottom and the at least one side together define a space to collect waste water. The bottom comprises an opening for a drain trap. The floor drain further comprises a heat exchanger element, receivable in the space of the drain compartment, for transferring heat present in the waste water to fresh water. The heat exchanger element is provided with a first connection and a second connection. The first connection and the second connection are arranged inside the space of the drain compartment. A first conduit is connected to the first connection and a second conduit is connected to the second connection.

A vent system for improving the efficiency and / or reducing emissions of a combustion device is disclosed. The vent system may include an outer pipe and an inner pipe having a longitudinal section that is permeable to water or water vapor and is longitudinally disposed within the outer pipe. The inner pipe defines a first passageway and the outer and inner pipes define a second passageway therebetween. As the moisture and / or heat are transferred from the flue gas to the intake air through the longitudinal section of the inner pipe, the efficiency of the furnace may be improved and the NOx emission of the furnace may be reduced.

A hot water storage-type hot water supply device is configured in such a manner that the amount of increase in the effective amount of heat within a hot water storage tank is increased to enable the device to operate efficiently. A hot water storage-type hot water supply device (1) for supplying heated hot water to a load circuit (300) which allows the user to utilize the hot water, wherein the hot water supply device (1) is provided with: a hot water storage tank (210) in which hot water is stored and which has outlets (231-233) for heating, said outlets allowing the hot water to be taken out to positions having different heights; an outlet selection section (430) for selecting an outlet for heating among the outlets (231-233) for heating, said outlet being that from which hot water is taken out, the selection being performed on the basis of the supply temperature which is the temperature of hot water supplied from the hot water storage tank (210) to the load circuit (300) and on the basis of the temperature of hot water taken out of the outlets for heating; and a heating section (100) for heating the hot water taken out of the selected outlet for heating and returned to the hot water storage tank (210).

A combination boiler provides heated water to a boiler loop and heated domestic hot water (DHW) to a DHW loop. A primary heat exchanger is connected to the boiler loop. A burner provides heat to the primary heat exchanger and an input fan supplies a fuel and air mixture to the burner. A secondary heat exchanger transfers heat energy from the boiler loop to a domestic water loop. A controller determines a boiler loop flow rate. The controller measures an input temperature of the boiler loop, an output temperature of the boiler loop, and a DHW output temperature of the domestic water loop. The controller determines a DHW input temperature and estimates a DHW flow rate. The input fan speed is initiated or operated according to a required heat output of the burner corresponding to the DHW flow rate.

Provided is an air-conditioning apparatus (100) comprising at least one intermediate heat exchanger (15) for exchanging the heat between a two-phase changing coolant or a supercritical-state coolant and a heating medium such as water or an antifreeze liquid different from the coolant. Further comprised are a refrigerating cycle circuit, in which a compressor (10), a heat-source side heat exchanger (12), at least one expansion valve (16) and a coolant-side passage of the intermediate heat exchanger (15) are connected via pipes for the coolant to flow therethrough, and a heating-medium circulating circuit, in which a heating medium-side passage of the intermediate heat exchanger (15), a pump (21) and a user-side heat exchanger (26) are connected via pipes for the heating medium to flow therethrough. The heating-medium circulating circuit is equipped with a fourth temperature sensor (34) for detecting the temperature of the heating medium flowing out from the user-side heat exchanger (26), so that the leakage of the heating medium from the heating-medium circulating circuit is detected on the basis of the change in the detected temperature of the fourth temperature sensor (34).

Heat exchanger for a high efficiency hot air heating appliance (1), with at least one segment (5) and with a primary section (14) and, viewed in the flow direction (A), followed by a secondary condensing section (15), whereby the segment (5) consists of at least one primary element (16) and at least two secondary condensing elements (19), that form part of the secondary condensing section (15) of the segment (5), and the inputs (20) of each of them are connected in parallel to the output (18) of the primary element (16) in such a way that the gas flow coming from the primary element (16) is divided over the secondary condensing elements (19) connected to it.

The invention provides a medium-deep strata and superficial strata geothermal energy combined heat supply and superficial strata geothermal energy heat supplement system. The system comprises internalswitching heat pump units, user side circulating pumps, ground source side circulating pumps, medium-deep strata geothermal well heat exchange systems and superficial strata buried pipe heat exchangesystems. The system has the advantages of being high in geothermal energy utilization rate, low in engineering investment and operation cost and high in heat pump unit heat supply system efficiency.Meanwhile, the technology is simple, the process of an energy supply system is clear, and efficient combination of the medium-deep strata geothermal energy and the superficial strata geothermal energyis achieved; in the whole geothermal energy utilization process, the heat is obtained, the water is not obtained, interference-free clean utilization of the geothermal energy is achieved, and zero emission of pollutants is achieved in the heat and cold supply process; and the ratio of the medium-deep strata geothermal energy to the superficial strata geothermal energy is allocated according to the user load demand and the actual project situations, and the problem that due to the fact that only the medium-deep strata geothermal energy is used for achieving heat supply, the construction cost is excessively high is effectively solved.

The invention discloses an urban heat supply network intelligent balance control system and method. The system includes a first adjustment component, a second adjustment component, a plate type heat exchange unit, and a control cabinet. A first regulating valve is arranged on a one-time water supply pipeline, a first temperature sensor is arranged on a one-time water return pipeline, a second regulating valve and a second temperature sensor are arranged on a second-time water supply pipeline, a third regulating valve is arranged on a bypass pipeline, each valve is adjusted according to the temperature value, the adjustment of a one-time network and the adjustment of a second-time network are separated, the adjustment of the one-time network is realized by relying on the return water temperature of the one-time network, the adjustment of the second-time network is realized by relying on the second-time supply water temperature, when the requirement of the second-time supply water temperature changes, the hydraulic working conditions of the one-time network is unaffected, stability of the hydraulic working conditions of the one-time network is ensured, decoupling operation of the one-time network and the second-time network is realized, and the problem of hydraulic disorder of the one-time network and the second-time network is solved.

A heat exchanger includes a burner configured to burn a combustible gas to produce heat, a heat exchanger configured to receive the heat from the burner, a flow sensor configured to measure a flow rate of a coolant passing through the heat exchanger; and a controller comprising processing circuitry. The processing circuitry receives flow data from the flow sensor and controls a firing rate of the burner based on a predetermined relationship between a differential temperature of coolant flowing through the heat exchanger and the coolant's flow rate.

A nonvolatile semiconductor memory includes a cell array, redundancy array, erase circuit, timer, and controller. The cell array has a plurality of memory cells. The redundancy array has a plurality of redundant cells capable of replacing the memory cell. The erase circuit performs an erase operation on a target cell including the memory cell or the redundant cell. The timer measures the time elapsed from the start of the erase operation performed for the target cell by the erase circuit. The controller stops the erase operation and replaces the target cell with the redundant cell, when detecting that a predetermined time has elapsed from the start of the erase operation by the measurement of the elapsed time by the timer.

A heat exchanger has an exchanger unit, including at least one first coiled conduit and one second coiled conduit that are substantially coaxial, and a casing for housing the exchanger unit. The casing has a first end wall, a second end wall, and a peripheral part between the two end walls. Each conduit has an inlet and an outlet, where the outlet of the first conduit is connected substantially in series to the inlet of the second conduit. The exchanger unit is supported by the first end wall of the casing, with the inlet of the first conduit and the outlet of the second conduit which are substantially at the first end wall of the casing.

A heat pump type hot water supply apparatus includes a heat pump unit 2 for heating water, a hot water tank 1 for storing therein hot water heated by the heat pump unit 2, and a hot water supply heat exchanger 10 which is placed substantially over a vertical entirety of interior of the hot water tank 1 and in which water flows from lower side toward upper side. Water that has flowed out from the upper side of the hot water supply heat exchanger 10 is discharged out from the top portion of the hot water tank 1.

A screw-in heat exchanger which is adapted to a dedicated heating element receptacle, commonly found on domestic electric hot water heater tanks, which allows a tank's water to be heated or cooled while circulating a hot or cold heat transfer fluid through the heat exchanger.

The invention relates to a warmer and a preparation method thereof, in particular to a valley electricity heat-storage warmer and a manufacturing method thereof. The upper ends and the lower ends of heat-dissipation tubes separately penetrate through an upper connecting plate and a lower connecting plate of a liner, an oil guiding tube is arranged in space between every two adjacent heat-dissipation tubes, the oil guiding tubes are connected with an oil tank, and the residual space of the liner is filled with a paraffin and expanded graphite composite phase-change material. The two ends of themultiple heat-dissipation tubes separately penetrate through the upper connecting plate and the lower connecting plate in a connection manner, each oil guiding tube is arranged in the space between the two corresponding adjacent heat-dissipation tubes, and the oil guiding tubes and the oil tank form a closed cycle so as to connect the optional three of a front connecting plate, a rear connectingplate, a left connecting plate and a right connecting plate which form the liner with the upper connecting plate and the lower connecting plate; after the liner is filled with the paraffin and expanded graphite composite phase-change material, a closed space is formed finally; and the liner is placed in a shell, and space between the liner and the shell is filled with a foaming heat-insulation material. Compared with the prior art, the valley electricity heat-storage warmer has the advantages that part of heat energy is stored during heating, and then the heat storage is facilitated so as to be capable of continuing to supply heat.

The invention discloses a distributed energy island system. The system comprises a waste heat recovering system, a heat storing system and a waste heat utilizing system, wherein heat transferring oilcircularly flows through the waste heat recovering system to realize heat recovering, and thus temperature increasing is achieved; the heat is stored into a heat storing tank through the heat storingsystem; an outlet of the waste heat recovering system is connected to a heat source inlet of the heat storing system through a control valve I; a heat source outlet of the heat storing system is connected to the waste heat utilization system through a control valve III; the waste heat recovering system directly communicates with the waste heat utilization system through a control valve II. According to the system, a heat storing device is additionally arranged and used for recovering the intermittently-discharged waste heat resource and storing surplus heat and utilizing the recovered intermittently-discharged waste heat resource and the stored surplus heat to realize peak load regulation of the system and supply a stable heat source, thus a power generation system can run in a stable condition, and the system running efficiency is improved; a waste heat recovering system integrating recovering function, storing function and utilizing function is formed, and cold, heat and electricitytri-generation is realized; and a distributed energy island is formed to maximum the utilization of the waste heat resource.

The invention discloses a phase change electric heat storage heating system with working-condition-based PID and self-adaptive feedforward compensation and a method. The system includes a wind circulation system and a water circulation system, and the water circulation system and the wind circulation system exchange heat through a heat exchanger, and output heating hot water. The wind circulationsystem includes a frequency conversion fan (1), a lower air duct (3), a phase change regenerative furnace (4) and an upper air duct (5). A working-condition-based PID and self-adaptive feedforward compensation control strategy can control the phase change electric phase change heating system according to the working conditions of the system, the problem that when the heating system working conditions are changed, traditional single closed-loop control is difficult to adapt to dramatic changes in system parameters is solved, and the feedforward compensation can quickly suppress deviation causedby furnace temperature disturbance. When adopting the working-condition-based PID and self-adaptive feedforward compensation control strategy, a water supply temperature fluctuation range is small, and the problem that the heating control stability of the phase change heat storage heating system is not high is solved.