116 results about "Coefficient of performance" patented technology

The invention provides a refrigeration house multi-fan intelligent cooperative defrosting control system and method. The refrigeration house multi-fan intelligent cooperative defrosting control system comprises an air-cooled condenser, a throttling valve, a compressor, a refrigerating chamber, a bypass valve, an air speed sensor, a temperature and humidity sensor, a temperature sensor, a pressure sensor, a flow meter, an air cooler tail end evaporator, data acquisition equipment, a central processing unit and a control output port. According to the cold storage scene that hot gas bypass defrosting is adopted, and one refrigerating unit is provided with a plurality of air coolers, the ratio (COP) of the accumulated refrigerating capacity to the total energy consumption in the operation period of each air cooler is calculated. And a comprehensive performance coefficient dynamic model of the air cooler is constructed by combining the temperature difference between the air supply and the air return, so that optimal energy efficiency of the air cooler and multi-fan defrosting control are realized. Compared with the prior art, the defrosting control logic is reconstructed from the perspective of the performance coefficient of the air cooler, the frosting condition of the surface of the evaporator at the tail end of the multiple fans of the refrigeration house can be accurately judged, it is ensured that the unit maintains high efficiency in the operation process, and development of the efficient and energy-saving control technology of a refrigeration house refrigerating system is facilitated.

The invention discloses a control method and system for energy efficiency optimization of a workshop air conditioning system of a constant-temperature and constant-humidity factory. The control method comprises the steps that a load prediction model is trained, and the constant-temperature and constant-humidity factory is partitioned to set importance weights for all air conditioners; based on a reinforcement learning algorithm, multi-objective optimization is carried out on an air conditioning system composed of all air conditioners, the reinforcement learning algorithm takes adjustment of operation parameters of all the air conditioners as actions, and the actions of each iteration and environment parameters, detected in real time, of a constant-temperature and constant-humidity factory workshop are input into a load prediction model; the predicted cold load, the predicted heat load and the predicted dehumidification amount of each air conditioner are obtained, and the performance coefficient of each air conditioner is calculated; and weighting the performance coefficient of each air conditioner according to the importance weight, and constructing a reward function for multi-objective optimization by combining a weighting result and the environment parameters, detected in real time, of the constant-temperature and constant-humidity factory workshop. According to the invention, the optimal optimization of the constant-temperature and constant-humidity factory among the lowest energy consumption, the most stable control and the highest precision is realized.

A heat pump system includes a heat pump and an auxiliary heat source. A heating coefficient of performance is determined for the heat pump based on ambient outdoor air temperatures, and the heat pump is operated to heat a process fluid an output temperature based on the heating coefficient of performance and a reference heating coefficient of performance. The auxiliary heat source can be operated to bring the process fluid to a target temperature for heating a load, with the target temperature being a function of the ambient outdoor air temperatures.

The invention provides a direct flue gas heat exchange heat pump control method and system, and relates to the technical field of flue gas waste heat recovery. The method comprises the steps that according to external working condition parameters, operation parameters are divided into a plurality of operation working condition sections, and historical highest performance coefficients and internal operation parameter combinations of all the operation working condition sections are stored; updating the dynamic baseline performance coefficient of each operation condition section according to the change trend of each operation condition section; calculating the deviation between the real-time performance coefficient and the dynamic baseline performance coefficient; and determining an adjustment value of the internal operation parameter according to the deviation and controlling the system to work. The method aims at solving the problem of COP optimal operation point drifting caused by part performance degradation during long-term operation of the direct flue gas heat exchange heat pump system, and the real optimal operation point of the system in the current degradation state can be determined in a self-adaptive mode, so that the optimal economical efficiency is continuously kept during operation of the system; and accelerated abrasion of parts due to long-term suboptimal operation is effectively avoided.

The invention relates to the technical field of heat exchangers, in particular to a collaborative design and control method, device and equipment for a heat exchanger and a storage medium, and the method comprises the steps that operation data of a target heat exchanger under at least one working condition are collected, and performance coefficient data meeting preset performance conditions are output through a multi-target collaborative optimization model; after operation is conducted according to the performance coefficient data, the flow value, the pressure value and the temperature value of the target heat exchanger are collected, and a corresponding adjusting instruction is determined; and based on the digital twin body, determining performance attenuation data and / or a fault diagnosis result, further generating an optimization instruction, and controlling the target heat exchanger. Therefore, the problems that in the related technology, under the variable load working condition, when the load deviates from a design point, the heat transfer and efficiency become poor due to fluid flow and flow velocity changes, vibration is caused by uneven flow, the temperature control precision is poor, and physical property changes and temperature pinch points are prone to occurring in a supercritical working medium are solved; the post-adjustment adaptability is poor, the performance is difficult to optimize, the response is slow, and potential safety hazards exist.

The invention provides an intelligent optimization control method for a factory power station building cold source system, and the method comprises the steps: firstly, building an energy-saving optimization control model for the power station building cold source system through the combined application of a cold source system mechanism and factory actual operation big data; secondly, deeply analyzing a refrigerator operation mechanism and an energy consumption expression, determining the property of a problem to be optimized, and determining an equation or inequality constraint condition according to inherent attributes of refrigerator equipment and an industrial field environment; and secondly, designing a particle swarm optimization algorithm sharing knowledge archives, creating a learning optimization model to guide the direction of swarm intelligence search, calculating and solving to obtain the decoded optimal branch chilled water inlet / outlet water temperature, and finally providing the optimal branch chilled water inlet / outlet water temperature to a control part, so that the COP (Coefficient Of Performance) index is remarkably improved.

According to the variable-component high-temperature super heat pump device and the operation method, a non-azeotropic mixed working medium serves as a technical core of a unit, two sub-compression-type cycles are arranged, an intermediate storage tank is arranged between the two sub-cycles, and the working medium is stored in the intermediate storage tank or extracted into a heat pump cycle on the basis of the heating temperature; and equivalently, the charge quantity of each heat pump is controlled, so that'on-line mobile charge quantity 'is realized, shutdown for working medium recovery is avoided, and high COP (coefficient of performance), low compression ratio and reliable operation are kept in a full-temperature area. Due to the adoption of the variable-component device, compared with the prior art, the heat pump has the advantages of higher heating efficiency and energy conservation.

The present disclosure relates to improving the energy performance of CO2 capture. [Solution] A system for capturing carbon dioxide (CO2) from a CO2-containing gas stream, comprising an absorber for contacting the CO2-containing gas stream with an adsorbent, the adsorbent operable to capture CO2 from the CO2-containing gas stream in a first temperature range and release the CO2 in a second temperature range, a desorber for releasing the CO2 from the adsorbent, first and second heat pumps configured to recover heat for the desorber from both a condenser and at least one other point in the system, and the condenser temperature selected to maximize both the heat content of the condensate and the combined coefficient of performance of the first and second heat pumps to minimize the input energy requirements of the heat pump system.

The invention relates to a heat source determination method and system. The method comprises the steps that under the condition that a vehicle heat pump of a target vehicle absorbs heat from air to supply heat to a vehicle cabin, current heat supply parameters of the air are determined; wherein the heat supply parameters comprise the heat supply amount and the heat supply performance coefficient; reference heat supply parameters corresponding to the current environment temperature, the current air conditioner gear of the target vehicle and the current electric drive torque are inquired from the heat supply relation; wherein the heat supply relation comprises heat supply performance coefficients under different environment temperatures, air conditioner gears and electric drive torque combinations and heat supply quantities under different environment temperature and electric drive torque combinations; and according to the current heat supply parameters and the reference heat supply parameters, the future heat source of the vehicle heat pump of the target vehicle is determined. By adopting the method, the reliability and accuracy of heat source determination can be improved, and the heating efficiency of the vehicle heat pump is further improved.

The application discloses a two-stage first-type lithium bromide absorption heat pump machine with two-stage evaporators connected at the bottom, which comprises a condenser, a secondary generator, a high-pressure stage secondary absorber, a high-pressure stage evaporator, a low-pressure stage secondary absorber, a low-pressure stage evaporator, a primary generator, a primary absorber, a primary heat exchanger, a secondary heat exchanger and pipelines arranged between the components. The main feature of the machine set is that the low-temperature waste heat source is divided into two sections, the high-temperature coolant water enters the high-pressure stage evaporator after flashing, then enters the high-pressure stage evaporator liquid tank, and the amount of coolant water used in the high-pressure stage evaporator and the low-pressure stage evaporator is automatically distributed through the coolant water connecting pipe. After being divided into sections, the concentration difference of the solution circulation is increased, the heat exchange temperature difference is increased, the heat exchange area is reduced, the material cost of the machine set is reduced, the equipment investment cost is reduced, the machine set is beautiful in appearance, compact in structure, high in performance coefficient, more waste heat can be recycled, and the comprehensive utilization rate of energy is improved.

The invention provides a solar energy and geothermal energy coupled heat supply control method and system and electronic equipment, and relates to the technical field of heat supply control, and the method comprises the steps that a first environment parameter representing the solar energy input intensity and a second environment parameter representing the underground heat source state are obtained; the solar heat supply heat is calculated according to the first environment parameter, and a geothermal heat exchange path is determined according to the second environment parameter; the performance coefficient of the ground source heat pump is calculated according to the soil average temperature corresponding to the geothermal heat exchange path, and the geothermal energy heat supply heat is calculated according to the performance coefficient and the heat pump input power; according to the matching degree between the heat supply demand and the solar heat supply heat, the target heat supply proportion between the solar heat supply heat and the geothermal heat supply heat is determined; and determining a target heat supply device based on the target heat supply proportion so as to carry out coupling heat supply control of solar energy and geothermal energy. According to the invention, cooperative coupling control of multiple energy sources is realized, and the overall energy efficiency and operation stability of the system are improved.

The application provides a control method and device of a multi-split air conditioner, the multi-split air conditioner, a storage medium and an electronic device, and the method comprises the following steps: detecting a temperature control instruction of a target room node of the multi-split air conditioner, wherein the multi-split air conditioner comprises a central control node and a plurality of room nodes; acquiring a current coefficient of performance (COP) of the target room node and predicting a future COP of the target room node after the target room node executes the temperature control instruction; and intervening in the execution of the temperature control instruction by an indoor unit of the target room node according to the current COP and the future COP. By adopting the scheme of the embodiment, the technical problem of low energy efficiency of the multi-split air conditioner in the related art is solved, and the energy efficiency optimization of the multi-split air conditioner is achieved.

The application discloses a lithium bromide heat pump integrated composite generator-condenser and system based on a hollow fiber membrane, utilizes industrial waste heat as a high-temperature heat source, combines membrane heat mass transfer technology of the hollow fiber membrane, combines a generator and a condenser in a lithium bromide absorption heat pump, and forms an integrated composite generator-condenser structure. The industrial waste heat is used as a high-temperature heat source to heat a dilute lithium bromide solution, water vapor in the high-temperature lithium bromide solution penetrates into a water vapor layer through the hollow fiber membrane due to a steam pressure difference, and the water vapor is cooled by circulating cooling water to realize simultaneous heat and working medium transfer. The condensed water does work in an evaporator and enters an absorber to be sprayed and mixed with a concentrated lithium bromide solution, and then enters the integrated composite generator-condenser again to circulate. The composite generator-condenser discards a form that a traditional evaporator and an absorber are separated, greatly reduces a land occupation area of the equipment, simultaneously avoids medium transportation between the equipment, reduces heat loss, and improves a performance coefficient of the heat pump.

This invention discloses an air-source-water source composite heat pump system and its operating method, solving the problems of low coefficient of performance and reliance on high-energy-consuming reverse-cycle defrosting methods in existing coupled systems, which are mostly simply set up in series or parallel. It has the beneficial effects of improving the coefficient of performance and ensuring the continuity and stability of industrial heating. The specific solution is as follows: An air-source-water source composite heat pump system includes a photovoltaic waste heat utilization unit: including a duct, the duct being placed on the back side of the photovoltaic module; a municipal greywater waste heat utilization unit: including a municipal greywater waste heat exchanger, the municipal greywater waste heat exchanger being connected to a municipal greywater pipeline; a low-temperature air-source-water source composite heat pump unit: including a photovoltaic-side evaporator, a first greywater-side evaporator, and a first-stage heating condenser located at the end of the duct, the municipal greywater waste heat exchanger being connected to the first greywater-side evaporator; and a high-temperature air-source-water source composite heat pump unit.

The invention discloses an automatic cascade absorption type refrigeration cycle system capable of recycling rectification heat and condensation heat in a cascade mode. Aiming at the core bottleneck of low thermodynamic efficiency of an automatic cascade absorption refrigeration cycle system, the invention innovatively aims at the characteristics that the adopted multi-element mixed working medium has a remarkable temperature slippage effect in a condensation process and a rectification process, and a heat dissipation temperature area in the rectification process is higher than that in the condensation process. By constructing a cascade recovery strategy of condensation heat and rectification heat, the thermal load of the circulating system is remarkably reduced, and then the performance coefficient is effectively improved. According to the system, rectification heat and condensation heat of the high-temperature and high-pressure side are recycled in a stepped mode through a solution of the circulating low-temperature and low-pressure side, and negative effects on other links of circulation are basically avoided under the condition that sufficient heat recycling is achieved. The thermodynamic efficiency of the self-cascade absorption type refrigeration cycle system can be remarkably improved, and the device has outstanding practical value in the field of deep low-temperature absorption type refrigeration driven by low-grade waste heat.

The invention provides a control method and device of a heat pump system and the heat pump system. The control method comprises the steps that it is determined that the heat pump system is in a heating mode, and the external temperature of the outdoor environment where the heat pump system is located is obtained; different water temperature detection operations are executed on a hot water tank of the heat pump system according to the interval range where the external temperature is located; and according to the detection result of the water temperature detection operation, the heat pump system is controlled to be switched between an energy-saving mode and a normal mode. According to the control method and control device of the heat pump system and the heat pump system, by considering the external environment temperature and the comprehensive condition of hot water in the water tank at the same time, the energy efficiency ratio (COP) of the system is improved while it is guaranteed that the hot water is rapidly heated, and therefore the problem that in the prior art, energy consumption is increased when a heat pump operates at high frequency is solved; and the problem of slow temperature rise of hot water possibly caused by low-frequency operation is solved.

The embodiment of the invention discloses a solar photovoltaic / photo-thermal and geothermal system performance evaluation method and system and a medium. The invention discloses a solar photovoltaic / photo-thermal and geothermal system performance evaluation method. The method comprises the following steps: acquiring an original temperature value and an operating temperature value of a soil core layer; the COP value of the ground source heat pump is determined according to the ratio of the output energy to the consumed electric energy of the ground source heat pump of the solar photovoltaic / photo-thermal and geothermal system; according to the difference value of the original temperature value and the operation temperature value and the COP value of the ground source heat pump, a COP temperature loss ratio index is determined; determining a system COP value according to the output energy and the system power consumption of the ground source heat pump of the solar photovoltaic / photo-thermal and geothermal system; a system COP temperature loss ratio index is determined according to the difference value of the original temperature value and the operation temperature value and the system COP value; the geothermal resource utilization efficiency of the ground source heat pump is evaluated according to the COP temperature loss ratio index, and the comprehensive performance of the system is evaluated according to the COP temperature loss ratio index of the system, so that the performance change in the operation process of the system is accurately reflected.

The invention relates to an air conditioner which comprises a refrigerant circulation loop, an outdoor fan and a water collector, and the outdoor fan is used for driving outdoor air to pass through an outdoor heat exchanger through rotation so that heat exchange can be conducted between a refrigerant and the outdoor air. The water collector is arranged between the outdoor heat exchanger and the first throttling device and comprises heat exchange fins and heat exchange pipe fittings. The heat exchange pipe fitting is arranged on the heat exchange fins in a penetrating mode, an inlet of the heat exchange pipe fitting communicates with an outlet of the outdoor heat exchanger, and an outlet of the heat exchange pipe fitting communicates with an inlet of the first throttling device. Due to the fact that the water collector is arranged between the outdoor heat exchanger and the first throttling device, the water collector can effectively reduce the temperature of the refrigerant discharged by the outdoor heat exchanger, and the refrigeration coefficient of the air conditioner is improved.

The invention relates to the technical field of heat exchanger data monitoring, in particular to a heat transfer monitoring and adjusting system and method for monitoring the state of a double-pipe heat exchanger. Comprising a sensing detection module, a data acquisition and preprocessing module, a performance calculation and feature extraction module, an intelligent decision and state evaluation module, a flow control and execution module, a man-machine interaction and alarm management module and a system integration and data bus module. According to the method, the flow redistribution strategy based on the performance coefficient is constructed, the flow is automatically cut off and the alarm is triggered when the performance degradation unit is detected, and meanwhile, the total flow is redistributed according to the performance coefficient proportion of the remaining online units, so that the high-performance heat exchanger obtains more flow resources; therefore, the overall heat transfer efficiency of the system can still be maintained under the condition of local faults, and intelligent optimization of flow and self-recovery of the system under the faults are achieved.

The invention discloses a dehumidification heat exchanger control method and system based on a mathematical model, and relates to the technical field of refrigeration air conditioners. A dehumidification heat exchanger control system based on a mathematical model comprises a data acquisition module, a data processing module, a curve drawing module, a model building module and a control reversing module. According to the method, the mathematical model is constructed according to the performance coefficient of the air conditioning system where the dehumidification heat exchanger is located in the reversing period, and the control system can comprehensively consider the actual working condition and the working state of the dehumidification heat exchanger through the maximum value obtained through calculation and the optimal reversing time corresponding to the maximum value; and the dehumidification heat exchanger is controlled to reverse under the condition that the performance coefficient of the system is kept in the optimal state, so that the requirement for adjusting the temperature and humidity of the space can be met, meanwhile, the high energy efficiency ratio of the air conditioning system is ensured, energy conservation and environmental protection are facilitated, and the control reasonability and practicability of the dehumidification heat exchanger control method and system are improved.

The application discloses an air conditioning system and a control method. The air conditioning system comprises a compressor and a control device. The compressor comprises a sliding valve, and one sliding position of the sliding valve corresponds to one content volume ratio of the compressor. The control device is configured to obtain a system volume ratio under a current working condition and a volume ratio correction value; obtain an optimal content volume ratio of the compressor; adjust the sliding position of the sliding valve; and obtain the volume ratio correction value through the following steps: setting a temporary volume ratio correction value and obtaining a performance coefficient of the air conditioning system corresponding to the temporary volume ratio correction value; gradually reducing the temporary volume ratio correction value by turns and obtaining the performance coefficient corresponding to the temporary volume ratio correction value until the performance coefficient obtained at the last time is less than the performance coefficient obtained at the previous time, and assigning the volume ratio correction value to the temporary volume ratio correction value obtained at the previous time. The application considers that the compressor is provided with an additional air inlet, the optimal content volume ratio is obtained by obtaining an optimized content volume ratio correction value, the sliding valve position is adjusted, and the compressor is operated at the best efficiency.

This invention discloses a refrigeration cycle method with liquid refrigerant compression, relating to the fields of refrigeration and gas liquefaction. The method includes a liquid tank, a liquid compression pump fixedly connected to one side of the liquid tank, and a main heat exchanger fixedly connected to the side of the liquid compression pump away from the liquid tank. The main heat exchanger is connected to an expander unit, a circulating gas compressor unit, and the liquid tank. The circulating gas compressor unit includes a circulating compressor and a circulating compression cooler. A cold box is provided outside the liquid tank, the liquid compression pump, the main heat exchanger, and the first and second expansion ends of the expander unit. This invention adds a liquid compression process to the refrigeration cycle, increasing the refrigerant pressure in both the liquid and gaseous states. Based on thermodynamics, a new refrigeration cycle method is created, reducing energy consumption during circulating compressed gaseous refrigerant, while simultaneously increasing energy recovery and utilization in multiple ways, improving the coefficient of performance (COP), and thus achieving the goal of reducing the total energy consumption of the refrigeration cycle.

The present invention relates to the field of heat pump systems, and in particular to an improved heat pump system and automatic wine distillation equipment with heating and cooling functions, comprising a heat pump device, a condensing device, a flash tank, a cold storage tank, a water pump, a steam secondary heating device and an intelligent control system. The heat pump device comprises at least one group of heat pump components, and the heat pump components comprise a compressor, an evaporator, a condenser and an expansion valve. The compressor, evaporator, condenser and expansion valve are connected, and the compressor is provided with a variable frequency drive module for adjusting the compressor speed in real time; the flash tank is provided with a second circulating water inlet and a first steam port, the condenser is placed in the flash tank, and the flash tank is equipped with a first temperature sensor; the system can flexibly switch between heating and cooling modes on the same equipment platform, significantly improving the overall performance coefficient of the system, reducing instantaneous peak load through energy storage and waste heat recovery of a honeycomb phase change material module, thereby achieving an average energy consumption reduction of more than 10%.

The utility model relates to the technical field of air conditioners, in particular to an air conditioning system and a carrier. The air conditioning system comprises a refrigerant loop, a first heat exchange loop, a second heat exchange loop and a heat exchange device. The refrigerant loop comprises a compressor, a condenser, a throttling device and an evaporator which are connected in sequence, and the first heat exchange loop is in heat exchange connection with the refrigerant loop through the condenser; the second heat exchange loop is in heat exchange connection with the refrigerant loop through an evaporator, and the first heat exchange loop is in heat exchange connection with the second heat exchange loop through a heat exchange device. According to the air conditioning system, secondary heat exchange between the refrigerant loop and the first heat exchange loop and the second heat exchange loop is achieved through the condenser and the evaporator, heat exchange connection between the first heat exchange loop and the second heat exchange loop is achieved through the heat exchange device, heat loss is compensated, and the heat transfer efficiency is optimized; therefore, the performance coefficient of the whole system is improved, and the energy consumption is reduced.

This invention relates to a refrigeration system designed as Rotary Supercharger Ejector Refrigeration System to improve the coefficient of performance and to reduce mechanical complexity. The design ensures that the working fluid performs expansion work as it passes through the generator. On the other hand, it eliminates the need for subcooling the liquid entering the pump. The design allows conversion of the high-speed kinetic energy from the ejector's outlet stream into recoverable potential energy. Consequently, the cycle closely approaches the ideal cycle. The rotation of coils increases convective heat transfer between coils and the atmosphere and eliminates the need for a blower as well as a complex mechanical pump. In addition to coil-air heat exchange, the system can be thermally coupled with hot rotating bodies to absorb waste heat and generate effective cooling.

The application is suitable for the technical field of thermal management, and provides a control method and device of a heat pump system, a computer program product and a vehicle. The heat pump system is connected between a regenerator and an evaporator for controlling the temperature of a passenger cabin and / or a battery thermal management assembly through a first throttling valve. The regenerator is connected to an outdoor heat exchanger through a second throttling valve. The control method of the heat pump system comprises: determining a current operation mode of the heat pump system; and performing opening degree control on the first throttling valve and the second throttling valve respectively according to the current operation mode. The embodiments of the application can improve the performance coefficient of the heat pump system.

The utility model provides an active enhanced vapor injection heat pump based on photovoltaic and photo-thermal, which comprises a heat pump host module, a solar module and a hydraulic module, and photovoltaic power generation drives the heat pump to do work and generate heat which is used as domestic hot water or heating, so that power is saved to the maximum extent. A flow channel is designed on the back face of the photovoltaic panel, heat is absorbed through circulating water, heat generated by the photovoltaic panel is recycled, the temperature of the photovoltaic panel is reduced, the photovoltaic power generation efficiency is improved, and hot water absorbing the heat is accumulated in the energy storage water tank and serves as an external heat source for active enhanced vapor injection to improve the performance of the heat pump. An active enhanced vapor injection device is designed for a heat pump host module, and a refrigerant in an economizer absorbs heat of heat storage hot water and converts the heat into heating capacity, so that the heating capacity and the performance coefficient of the heat pump are greatly improved, and the technical bottleneck that the heat pump cannot be applied in an extremely low-temperature environment is solved.

According to the photovoltaic panel heat dissipation system and method coupled with the supercritical carbon dioxide heat pump, efficient thermal coupling is carried out on the photovoltaic module back plate and the micro-channel integrated heat exchanger at the evaporation end of the supercritical carbon dioxide heat pump, and a transcritical cycle working medium is utilized; a large amount of waste heat generated during operation of a photovoltaic panel is actively absorbed and transferred, so that the working temperature of the photovoltaic panel is remarkably reduced to 45-55 DEG C so as to improve the power generation efficiency by 10%-15%, meanwhile, the captured low-grade waste heat is upgraded into medium-high-grade heat energy at the temperature of 60-90 DEG C through heat pump circulation to be output and utilized, cooperative operation of photovoltaic power generation and waste heat recovery and quality improvement is achieved, and the power generation efficiency is improved. The comprehensive energy efficiency of the system exceeds 70%, the heating performance coefficient of the heat pump reaches 3.2-3.8, photovoltaic self-power-generation driving is mainly used, and the system has multiple benefits of reducing carbon emission, prolonging the service life of components and adapting to various heat using scenes.

Proposed is a heat recovery technique that manifests an energy-saving effect to the greatest extent possible. Provided is a device comprising: a drainage path through which flows post-cleaning wastewater that has been used in cleaning treatment of a material having increased temperature; a replenishment water path through which flows replenishment water for the cleaning treatment; a first circulation path through which a first heating medium circulates; a first heat exchanger that is provided to the drainage path and the replenishment water path, the first heat exchanger performing heat exchange between the wastewater and the replenishment water; a second heat exchanger that is provided downstream of the first heat exchanger in the drainage path, the second heat exchanger performing heat exchange between the wastewater and the first heating medium; a heat pump of which the low-temperature side is connected to the first circulation path and the high-temperature side is connected downstream of the first heat exchanger in the replenishment water path; and a control unit that controls the first heat exchanger so that the coefficient of performance of the first heat exchanger and the heat pump improves when the replenishment water that has been increased in temperature via the first heat exchanger is furthermore increased in temperature due to heat from the wastewater recovered in the first heating medium and electric power supplied to a compressor and an evaporator of the heat pump.

The utility model relates to a coal-fired cogeneration system integrating double-circulation heat pump heat storage. The coal-fired cogeneration system comprises a steam turbine system, a heat supply network water heating system, a heat pump system and a storage tank heat storage and release system. The steam turbine system comprises a boiler (23), a superheater outlet of the boiler (23) is connected with an inlet of a third mixing valve (22), another inlet of the third mixing valve (22) is connected with a cold source outlet of an auxiliary superheater (17), and an outlet of the third mixing valve (22) is connected with an inlet of a high-pressure cylinder (28). On the basis of a traditional combined heat and power generation system, excessive electric energy is converted into heat energy to be stored and utilized by integrating a heat pump and a heat storage system. According to the system, the overall heating performance coefficient is improved through low-temperature heat pump circulation, the heat supply capacity is enhanced, and thermoelectricity decoupling and low-carbon flexible operation of a coal-fired cogeneration unit can be achieved.