49 results about "Cryogenic energy storage" patented technology

The invention discloses a multi-combined supply system and method integrating Carnot cell energy storage and liquid hydrogen cold energy. The multi-combined supply system comprises a vapor compression refrigeration cycle charging system, a Rankine cycle discharging system, a low-temperature energy storage system, a high-temperature energy storage system, a liquid hydrogen cold energy utilization system, a fuel cell waste heat utilization system and a liquid hydrogen pipeline. The charging system comprises a first compressor, a first condenser, a second compressor, a second condenser, a first throttle valve and a first evaporator which are sequentially communicated and circulated; the high-temperature heat storage tank and the low-temperature heat storage tank of the high-temperature energy storage system exchange heat with the discharge system through the second evaporator and the third evaporator; a high-temperature cold storage tank and a low-temperature cold storage tank of the low-temperature energy storage system exchange heat with the charging system and the discharging system through a first evaporator and a third condenser respectively; the liquid hydrogen cold energy utilization system achieves the liquid hydrogen gasification cold energy power generation process. The efficient comprehensive energy system is constructed by using liquid hydrogen cold energy and fuel cell waste heat.

The invention provides a stepped energy storage system which comprises a power cycle unit, a high-temperature energy storage unit, a low-temperature energy storage unit, a high-temperature heater, a low-temperature heater and a control unit and is divided into two operation stages including an energy storage mode and an energy release mode. According to the system, the low-temperature energy storage system and the high-temperature energy storage system are combined to achieve stepped energy storage, and through cooperation with the intelligent control unit and the power circulation unit, the system can be flexibly switched between an energy storage mode and an energy release mode, so that the power requirements under different working conditions are accurately responded, and the power supply efficiency is improved. And the # imgabs0 # loss of the high-grade heat energy in the transfer process is reduced.

The invention belongs to the technical field of building energy management and energy storage, and provides a building load transfer system and method based on graded phase change heat storage, in an energy storage stage, high-temperature hot water prepared by an electric heating device enters a graded phase change energy storage subsystem through a pipeline; in the heat supply stage, building return water is heated by the high-temperature energy storage unit and the low-temperature energy storage unit and then fed into the heat supply tail end; in the refrigeration stage, hot water output by the high-temperature energy storage unit drives the ammonia water absorption refrigerator to generate chilled water, then cooling is conducted through the heat supply tail end, and the high-temperature energy storage unit and the low-temperature energy storage unit are innovatively arranged in series; during energy storage, hot water sequentially releases heat according to the temperature from high to low, and return water sequentially absorbs heat according to the temperature from low to high during energy release and heat supply, so that temperature alignment and gradient utilization of heat energy are realized, loss in the heat transfer process is greatly reduced, and the overall energy utilization efficiency is remarkably higher than that of a traditional single-stage heat storage system; and the application of the phase change energy storage technology in building energy storage and energy utilization is promoted.

The invention relates to a cryogenic energy storage system (CESS), particularly to a hybrid CESS which includes superconducting electrical based components, devices and systems therein requiring access to cryogenic temperatures to function. The CESS includes a cryogen storage facility such as a tank or cylinder filled with a cryogen, such as liquid air. A cryogen expansion arrangement is provided to the CESS to expand stored cryogen from the cryogen storage facility, in use; and an energy generating arrangement is provided to use expanding cryogen from the cryogen expansion arrangement to generate electrical energy, in use. A superconducting system, comprising a superconducting device, is embedded in the cryogen storage facility in order to function at a desired operating temperature having no or little influence on the cryogenic energy storage system (CESS).

The utility model relates to a vehicle low-temperature energy storage management system which is in communication connection with an external temperature sensor of a vehicle and comprises a heating device, an electronic water pump, a first flow control valve, an electric control three-way valve, an engine air inlet air filter and an engine. The electronic water pump is connected with the first flow control valve, the first flow control valve is connected with an inlet of the electric control three-way valve and connected with an air inlet of the engine air inlet air filter through a first outlet of the electric control three-way valve, and an air outlet of the engine air inlet air filter is connected with a water jacket water inlet of an engine to form an air inlet system heating loop. A second outlet of the electric control three-way valve is connected with a water jacket water inlet of the engine, a water jacket water outlet of the engine is connected with a first water inlet of the heating device to form an engine heat engine heating loop, heat is provided for the engine and an engine air inlet air filter, the engine and the engine air inlet air filter are heated, and then a vehicle is started rapidly and timely.

The present invention relates to cryogenic energy storage systems for storing using high-grade heat-of-compression. The system includes a liquefaction sub-system (100) and thermal energy storage device (300). The liquefaction sub-system (100) includes a first compressor (102), a first, second and third heat exchanger (104, 116, 112) and second compressor (114). The first and second heat exchangers (104, 116) are configured to transfer the high-grade heat of compression from the first and second compressors (102, 114) respectively to the thermal energy storage device (300). The third heat exchanger (112) is configured to recuperate the low-grade heat of compression from the second compressor (114) back into the second compressor (114) enabling the second compressor (114) to generate high-grade heat of compression. Further systems use compressors (124) and expanders (122). Further systems include power recovery sub-systems (400). The present disclosure also relates to methods of heat-of-compression storage in cryogenic energy storage systems.

The present invention relates to cryogenic energy storage systems for storing using high-grade heat-of-compression. The system includes a liquefaction sub-system (100) and thermal energy storage device (300). The liquefaction sub-system (100) includes a first compressor (102), a first, second and third heat exchanger (104, 116, 112) and second compressor (114). The first and second heat exchangers (104, 116) are configured to transfer the high-grade heat of compression from the first and second compressors (102, 114) respectively to the thermal energy storage device (300). The third heat exchanger (112) is configured to recuperate the low-grade heat of compression from the second compressor (114) back into the second compressor (114) enabling the second compressor (114) to generate high-grade heat of compression. Further systems use compressors (124) and expanders (122). Further systems include power recovery sub-systems (400). The present disclosure also relates to methods of heat-of-compression storage in cryogenic energy storage systems.

The invention relates to the field of environmental test equipment, in particular to a multifunctional comprehensive impact device. The device comprises a temperature and humidity tank, a low-temperature tank and a platform driving device, wherein the temperature and humidity tank comprises a temperature and humidity main air chamber, a temperature and humidity heating device, a temperature and humidity gas circulation switch turning plate, a high-temperature gas energy storage device and a humidifying device; the low-temperature tank comprises a low-temperature main air chamber, a heater, a low-temperature main air chamber sealing turning plate, a refrigerating device, a low-temperature energy storage device and a translation door; the platform driving device comprises an electric driving device, a linear lead device and a driving connection moving platform, rapid switching between the temperature and humidity groove and the low-temperature groove can be achieved, and moisture on the surface of a product is removed through the drying and purging device. The purposes of improving the environmental test efficiency, reducing the energy consumption and ensuring the accuracy of the test result are achieved.

A method for exhaust aftertreatment of an internal combustion engine (10) with an exhaust system (20) in which a NOx storage catalyst (28) with a low-temperature storage component (48) made of cerium oxide and a high-temperature storage component (52) made of barium carbonate as well as an SCR catalyst (34) and / or particulate filter (30) with an SCR coating (32) arranged downstream of the NOx storage catalyst (28) in the flow direction of an exhaust gas of the internal combustion engine (10), comprising the following steps: - Modeling the loading state of the NOx storage catalyst (28), wherein - the charging of the low-temperature storage component (48) is determined by a first model for the charging of the low-temperature storage component (48), and - the loading of the high-temperature storage component (52) is determined by a second model for the loading of the high-temperature storage component (52), - Regenerating the NOx storage catalyst (28) by introducing unburned hydrocarbons into the exhaust system (20) of the combustion engine (10) when the high-temperature storage component (48) has reached a defined loading level and the SCR catalyst (34) or the particulate filter (30) with the SCR coating (32) has an operating temperature at which selective catalytic reduction of nitrogen oxides is possible, wherein - depending on whether the SCR catalyst (34) or the particulate filter (30) with the SCR coating (32) has an operating temperature at which selective catalytic reduction of nitrogen oxides is possible, at least two threshold values ​​are used, wherein - a first threshold value is provided at which a regeneration of the NOx storage catalyst (28) is carried out when the SCR catalyst (34) or the particulate filter (30) with the SCR coating (32) has reached its operating temperature and wherein - a second threshold is provided at which regeneration of the NOx storage catalyst (28) takes place independently of the temperature of the SCR catalyst (34) or the particulate filter (30) with SCR coating (32).

An energy storage system comprises at least one cryogen storage device that includes a subcooling loop and that is configurable to store a cryogen with or without boil-off losses. The system also comprises a cryoplant configured to interact with a power source and with the subcooling loop of the at least one cryogen storage device. The system also includes a control system configured to control the interaction of the cryoplant with the power source and the at least one cryogen storage device. The control system is configured to control interaction of the cryoplant with the power source and the at least one cryogen storage device according to a plurality of operational modes, including: a cooling mode, a passive storage mode, a fuel cell backup mode, and a liquefaction mode.

The utility model discloses a kind of based on liquid air energy storage's cogeneration unit start-stop peak shaving system, including the coal-fired generating unit for producing electric energy, the electric energy of the coal-fired generating unit for consumption is changed into heat and liquid air storage unit and the civil heating unit for carrying out external heating using the heating extraction steam provided by the coal-fired generating unit and the surplus compressed heat provided by liquid air energy storage unit, the high-pressure equipment of liquid air energy storage unit is connected at the power generation end of the coal-fired generating unit, and the civil heating unit is connected with liquid air energy storage unit and the coal-fired generating unit respectively.The utility model is based on guaranteeing the maximum heating load of external network of cogeneration unit, to configure minimum capacity liquid air energy storage system to realize start-stop peak shaving, both can guarantee heating, and can realize start-stop peak shaving function, simultaneously with minimum capacity configuration, reduce system redundancy, reduce initial investment.

An energy recovery subsystem (10) for a cryogenic energy storage system (1) comprising: an evaporator (14); a first heat exchanger (21) for passing heat energy from a heat transfer fluid (6) to a work

The present invention relates to cryogenic energy storage systems for storing using high-grade heat-of-compression. The system includes a liquefaction sub-system (100) and thermal energy storage device (300). The liquefaction sub-system (100) includes a first compressor (102), a first, second and third heat exchanger (104, 116, 112) and second compressor (114). The first and second heat exchangers (104, 116) are configured to transfer the high-grade heat of compression from the first and second compressors (102, 114) respectively to the thermal energy storage device (300). The third heat exchanger (112) is configured to recuperate the low-grade heat of compression from the second compressor (114) back into the second compressor (114) enabling the second compressor (114) to generate high-grade heat of compression. Further systems use compressors (124) and expanders (122). Further systems include power recovery sub-systems (400). The present disclosure also relates to methods of heat-of-compression storage in cryogenic energy storage systems.

The utility model provides a liquid nitrogen and liquid neon combined cold storage system applied to liquid hydrogen energy storage and a cold storage method, and particularly relates to the technical field of low-temperature energy storage, the liquid nitrogen and liquid neon combined cold storage system applied to liquid hydrogen energy storage comprises a cold storage unit, the cold storage unit comprises a first heat exchanger, a second heat exchanger, a third heat exchanger and a fourth heat exchanger, when the hydrogen is liquefied again, the high-pressure liquid neon, the normal-pressure liquid neon and the normal-pressure liquid nitrogen of the cold storage unit are used for providing pre-cooling cold for the hydrogen, the high-pressure liquid neon, the normal-pressure liquid neon and the normal-pressure liquid nitrogen of the cold storage unit are used as cold storage working media, the high-pressure liquid neon, the normal-pressure liquid neon and the normal-pressure liquid nitrogen of the cold storage unit are used for providing pre-cooling cold for the hydrogen when the hydrogen is liquefied again. And gradient heat exchange is used for cold release and cold storage, so that a cold release temperature area of liquid hydrogen can be matched to the maximum extent, high-quality cold energy of 27K, 40K and 77K low-temperature areas is recycled, the heat exchange temperature difference is reduced, and the low-temperature high-quality cold energy recycling rate is increased.

The utility model relates to the technical field of energy recovery, in particular to an energy storage system and a power generation system, the energy storage system comprises a low-temperature energy storage tank and a high-temperature energy storage tank, a first heat storage passage and a second heat storage passage are formed between the low-temperature energy storage tank and the high-temperature energy storage tank, and the first heat storage passage and the second heat storage passage are arranged in parallel; the first heat storage channel is provided with a first heater, the second heat storage channel is sequentially provided with a first heat exchanger, a medium-temperature energy storage tank and a second heater in series, and the first heat exchanger is used for heat exchange between a heat exchange medium and an energy storage medium. According to the utility model, available waste heat in the heat exchange medium is stored through the medium-temperature energy storage tank, so that the problem of energy waste in the prior art is solved; and each heat storage passage is provided with a heater, so that the temperature of the energy storage medium in each heat storage passage can be accurately controlled by adjusting the power of the heaters, and the accuracy and the stability of temperature control of the energy storage system are improved.

The present invention relates to cryogenic energy storage systems for storing using high-grade heat-of-compression. The system includes a liquefaction sub-system (100) and thermal energy storage device (300). The liquefaction sub-system (100) includes a first compressor (102), a first, second and third heat exchanger (104, 116, 112) and second compressor (114). The first and second heat exchangers (104, 116) are configured to transfer the high-grade heat of compression from the first and second compressors (102, 114) respectively to the thermal energy storage device (300). The third heat exchanger (112) is configured to recuperate the low-grade heat of compression from the second compressor (114) back into the second compressor (114) enabling the second compressor (114) to generate high-grade heat of compression. Further systems use compressors (124) and expanders (122). Further systems include power recovery sub-systems (400). The present disclosure also relates to methods of heat-of-compression storage in cryogenic energy storage systems.

The invention provides a modularized cold storage system and method capable of monitoring a thermocline, relates to the technical field of low-temperature energy storage, and solves the problems that a low-temperature storage tank cannot monitor distribution of the thermocline in the tank, and the low-temperature storage tank cannot realize modularized design to meet various cold energy application requirements. According to the invention, the first-stage cold storage units composed of the second-stage cold storage units and the monitoring units are arranged, and the parallel path combination of the plurality of first-stage cold storage units and the main pipeline is realized by controlling the opening and closing of the bypass pipeline switch valves so as to adapt to different cold energy requirements; and meanwhile, a thermocline temperature distribution formula is corrected in real time by using data acquired by a multidirectional temperature sensor in the monitoring unit. Various cold energy requirements are met through the modular assembly, the monitoring unit is combined with the thermocline temperature distribution formula to monitor thermocline temperature field distribution in the low-temperature storage tank in real time, visualization of the temperature field in the storage tank in the cold storage / cold release process is achieved, meanwhile, the cold storage / cold release efficiency and the operation stability are improved, and the energy consumption and the site adaptation threshold are reduced.

The present application relates to the technical field of cable, and discloses a brittle prevention high-elasticity low-temperature-resistant energy storage system cable, aiming to solve the problems of low-temperature brittle prevention of the protective sleeve of traditional integrated cable, stress superposition and easy fracture of the bending part, the cable comprises a conductor and a cable protective layer, the protective layer is formed by interval arrangement of a first supporting assembly and a flexible assembly, the flexible assembly is coaxially fixed with a second supporting assembly outside, the second supporting assembly is in clearance fit with the first supporting assembly, when the cable is bent, the adjacent first supporting assemblies extrude the flexible assembly, and the overall bending is realized through the deformation of the flexible assembly, meanwhile, the first and second supporting assemblies can limit the bending amplitude of a single position, and the deformation is evenly distributed to stress by the multiple flexible assemblies, the scheme realizes the complement of pressure resistance, wear resistance, low-temperature flexibility, can disperse stress, reduce the risk of low-temperature brittle fracture, and guarantee the structural integrity and service life of the cable in harsh environment.

The invention relates to the technical field of cables, discloses an anti-embrittlement high-elasticity low-temperature-resistant cable for an energy storage system, and aims at solving the problems that a traditional integrated cable protection sleeve is prone to embrittlement at low temperature and prone to breakage due to stress superposition of a bending part. The protection layer is formed by arranging first supporting assemblies and flexible assemblies at intervals, second supporting assemblies are coaxially and fixedly connected outside the flexible assemblies, the second supporting assemblies and the first supporting assemblies are in clearance fit, when the cable is bent, the adjacent first supporting assemblies extrude the flexible assemblies, and overall bending is achieved through deformation of the flexible assemblies; meanwhile, the first supporting assembly and the second supporting assembly are matched so that the bending amplitude of a single position can be limited, the stress of deformation can be equally divided by the multiple flexible assemblies, the scheme achieves complementation of compression resistance, abrasion resistance and low-temperature flexibility, stress can be dispersed, the low-temperature brittle failure risk can be reduced, and the structural integrity and the service life of the cable in a severe environment are guaranteed.

The utility model provides a liquid hydrogen energy storage system adopting solid phase cold accumulation, and particularly relates to the technical field of low-temperature energy storage, which comprises a power supply conveying unit, a cold accumulation packed bed and a liquefaction supply unit, wherein the liquefaction supply unit comprises a hydrogen production device, a precooling heat exchanger, an ortho-parahydrogen converter, a final-stage heat exchanger and a liquid hydrogen storage tank; the power supply conveying unit comprises a storage module, a power supply module and a cold storage packed bed; when the liquid hydrogen is used by the power supply conveying unit, the cold energy of the liquid hydrogen is stored in the cold storage packed bed, and when the liquid hydrogen is filled into the power supply conveying unit next time, the cold energy stored in the cold storage packed bed is used for providing precooling for the liquefaction supply unit, the cold energy is recovered by the cold storage packed bed, and the hydrogen is converted into the liquid hydrogen for providing precooling. And compared with cold energy cycle power generation, the utilization rate of high-quality cold energy in a low-temperature area is higher.

The present invention discloses a deep cryogenic energy storage and oxy-fuel combustion carbon capture system for compressed air in a thermal power plant, which includes a low-pressure compressor, a high-pressure compressor, a solid particle heat storage system and a molten rock heat storage system. The low-pressure compressor and the high-pressure compressor are driven by an electric motor or a steam turbine. When the power consumption load of the power grid is small or the power plant has surplus electricity, the surplus electric energy drives the low-pressure compressor and the high-pressure compressor to compress the air inhaled from the atmosphere. Compression causes the air temperature to rise, and the heat generated during the compression process is stored through the molten rock heat storage system and the solid particle heat storage system. The present invention solves the problems of low efficiency of existing compressed air energy storage and large loss of exhaust residual energy, effectively utilizes the internal energy of the exhaust gas, increases the concentration of carbon dioxide in the exhaust gas, and effectively reduces the operating cost of carbon capture.

The invention discloses an energy-saving ventilation and heat insulation roof which comprises a herringbone frame. The rain sheltering mirrors are arranged on the herringbone frame in an array mode, and the rain sheltering mirrors are used for preventing rainwater from entering a room; the first phase change energy storage assembly is arranged at the tops of the two sides of the herringbone frame, the second phase change energy storage assembly is arranged at the bottom of the herringbone frame, the first energy storage assembly comprises a plurality of sets of high-temperature energy storage plates, the high-temperature energy storage plates are slidably connected to the herringbone frame, a first driving device is arranged on one side of each high-temperature energy storage plate, and a second driving device is arranged on the other side of each high-temperature energy storage plate. The high-temperature energy storage plate can be matched with the first driving device to be unfolded or closed. A plurality of groups of low-temperature energy storage plates are arranged, the low-temperature energy storage plates are rotatably connected with the herringbone frame, a driving device II is arranged on the herringbone frame, the driving device II can turn over the low-temperature energy storage plates, and the phase change temperature of the high-temperature energy storage plates ranges from 30 DEG C to 35 DEG C; and the phase change temperature of the low-temperature energy storage plate is 20-25 DEG C.

The application discloses a multi-supply system and method integrating Carnot cell energy storage and liquid hydrogen cold energy, comprising a vapor compression refrigeration cycle charging system, a Rankine cycle discharging system, a low-temperature energy storage system, a high-temperature energy storage system, a liquid hydrogen cold energy utilization system, a fuel cell waste heat utilization system and a liquid hydrogen pipeline; the charging system comprises a first compressor, a first condenser, a second compressor, a second condenser, a first throttling valve and a first evaporator which are sequentially connected in a circulation mode; the high-temperature energy storage system is in heat exchange with the discharging system through a second evaporator and a third evaporator; the low-temperature energy storage system is in heat exchange with the charging and discharging systems through a first evaporator and a third condenser respectively; and the liquid hydrogen cold energy utilization system realizes a liquid hydrogen gasification cold energy power generation process. The application utilizes liquid hydrogen cold energy and fuel cell waste heat to construct a high-efficiency comprehensive energy system.

The invention discloses a novel energy-storage 18-DEG C phase change material and a preparation method thereof, and belongs to the technical field of novel phase change materials. The material is prepared from a modified anhydrous calcium chloride-magnesium nitrate hexahydrate compound, a phase change temperature micro-adjusting agent, nano modified ammonium carbonate, a sodium silicate reinforcing agent, a polymer network structure thickening agent, graphene oxide nanosheets, a low-temperature stabilizer and the like. Stable phase change and high latent heat energy storage capacity near-18 DEG C are achieved, meanwhile, the material has excellent stability and durability and is suitable for various low-temperature energy storage applications, the preparation method is simple and efficient, the steps of ultrasonic dispersion, high-speed shearing, microwave treatment, secondary ultrasonic treatment and the like are adopted, and uniform dispersion and rapid curing of the material are achieved; the material also has good environmental protection performance and sustainability, and is widely applied to a freezer, a freezer car and other places needing cold storage.

The present invention specifically relates to a sodium-cooled fast reactor (SFR) power-industrial high-temperature steam peak-shaving cogeneration system, comprising a sodium-cooled fast reactor (SFR), a first pump, a sodium heat exchanger, a high-temperature energy storage tank, a low-temperature energy storage tank, a second pump, a third pump, a water heat exchanger, a feed water tank, a steam turbine, a power grid, and an electrically heated superheater. The SFR is immersed in an intermediate heat exchanger. The SFR is connected to the tube side of the intermediate heat exchanger, forming a primary circuit. The shell side of the intermediate exchanger, the tube side of the sodium heat exchanger, and the first pump together form a secondary circuit. The shell side of the sodium heat exchanger, the low-temperature energy storage tank, the high-temperature energy storage tank, the second pump, the third pump, and the tube side of the water heat exchanger together form a tertiary circuit. The shell side outlet of the water heat exchanger, the steam turbine, and the electrically heated superheater together form side A of the fourth circuit. The SFR power-industrial high-temperature steam peak-shaving cogeneration system of the present invention enables the rapid switching of the SFR from power grid peak-shaving to high-temperature industrial steam production mode, while simultaneously improving the safety and economic efficiency of the SFR.

The invention provides an energy recovery subsystem (10) for a cryogenic energy storage system (1), comprising: an evaporator (14); a first heat exchanger (21) for transferring thermal energy from the heat transfer fluid (6) to the working fluid (5); one or more expansion stages (30) for extracting work from the working fluid (5); a regenerator (40) for transferring thermal energy from the working fluid (5) to the working fluid (5); a first conduit arrangement (100) for conveying a working fluid (5); a second conduit arrangement (200) connectable to the thermal energy storage device (TESD) (3) and to the first heat exchanger (21) for conveying a heat transfer fluid (6); the first piping arrangement (100) sequentially connects the evaporator (14), the regenerator (40), the first heat exchanger (21), and reconnects the regenerator (40) and the one or more expansion stages (30).

A power recovery sub-system for a cryogenic energy storage system, the sub-system comprising: a first and a second thermal energy storage device (TESD); a first, a second and a fourth heat exchanger (HEX); a first, a second and a fourth expansion stage; a first arrangement of conduits, having an upstream end and a downstream end, and configured to pass a working fluid through the first HEX, the first expansion stage, the second HEX, and the second expansion stage; a second arrangement of conduits configured to pass a first heat transfer fluid from the first TESD, through the first and the second HEX; and a third arrangement of conduits configured to pass a second heat transfer fluid from the second TESD, through the fourth HEX, wherein the first arrangement of conduits is configured to pass the working fluid through the fourth HEX and the fourth expansion stage.

A gas heat supplement and heat storage power generation system comprises a low-temperature energy storage system, a high-temperature energy storage system, a molten salt energy storage device, a counterflow heat exchanger, a compressor, an expander, a generator, a boiler combustion heating system and connecting pipelines therebetween; the boiler combustion heating system comprises a combustion chamber and a boiler heating system in communication with the combustion chamber; the boiler heating system mainly comprises a heating module, and a heat absorption pipeline is arranged in the heating module; the expander and the heat absorption pipeline are connected in series and are connected in parallel with the compressor branch between one end of a steam passage of the counterflow heat exchanger and a port A of the low-temperature energy storage system; the other end of the steam passage of the counterflow heat exchanger is in communication with a port B of the high-temperature energy storage system; and both ends of a molten salt passage of the counterflow heat exchanger are in communication with the molten salt energy storage device. The design of the boiler heating system is added, the power generation efficiency is improved, and the commercial implementation is easy.

The application provides a control method for improving the steam temperature control effect of a coal-fired unit by coupling a medium-low temperature energy storage system; a load cooperative matching control method is designed, so that the medium-low temperature energy storage system and a boiler-turbine coordination system of the coal-fired unit jointly bear the whole unit load; in the process of load reduction, the work amount of high-pressure cylinder exhaust steam is obtained by an equivalent enthalpy drop method, the load instruction of the medium-low temperature energy storage system is calculated, the load instruction of the boiler-turbine coordination system of the coal-fired unit is obtained by using parameters such as the originally set load change rate, the initial load and the target load of the coal-fired unit, and the reheated steam temperature regulation mode is corrected; in the process of load increase, the load instruction of the medium-low temperature energy storage system is obtained by the energy storage capacity of the medium-low temperature system, the load instruction of the boiler-turbine coordination system of the coal-fired unit is obtained by using parameters such as the originally set load change rate, the initial load and the target load of the coal-fired unit, the load change pressure of the coal-fired unit is relieved, the parameter fluctuation range of the coal-fired unit is reduced, and the load change performance of the coal-fired unit is improved.