A combined cooling heating and power system combining an electric regenerative heat device with an organic rankine cycle

Abstract

The application discloses a combined cooling, heating and power system of an electric heat accumulation device and an organic Rankine cycle, which comprises an electric heat accumulation heat source system, an organic Rankine cycle power generation system, an absorption refrigeration system and a circulating water heating system; the electric heat accumulation heat source system is connected with a power grid to convert electric energy into heat energy and store the heat energy; the organic Rankine cycle power generation system is connected with the electric heat accumulation heat source system to generate power by using the heat energy; the organic Rankine cycle power generation system is connected with the power grid and / or a user to supply power; the absorption refrigeration system is connected with the electric heat accumulation heat source system and / or the organic Rankine cycle power generation system to generate refrigeration by using the heat energy; the absorption refrigeration system is connected with the user to supply refrigeration; the circulating water heating system is connected with the electric heat accumulation heat source system and / or the organic Rankine cycle power generation system to use the heat energy; and the circulating water heating system is connected with the user to supply heating. The electric heat accumulation device is used to convert electric energy in a low-valley electric time period into heat energy and store the heat energy, and the heat energy is used to supply heating, refrigeration and power for the user when needed.

Description

Technical Field

[0001] This invention relates to the field of energy utilization technology, specifically to a combined cooling, heating and power system that combines an electric thermal storage device with an organic Rankine cycle. Background Technology

[0002] While vigorously promoting the grid connection of large-scale clean energy power generation systems, the intermittent, fluctuating, and random characteristics of wind and solar power generation pose significant challenges to the stability of the existing power grid. This results in a greater challenge to the grid's peak-shaving capacity. Relying solely on coal-fired power plants for peak shaving remains problematic in terms of economics and energy utilization. Currently, a certain scale of electric thermal storage equipment has been used for peak shaving in thermal power plants, but the stored heat can only be used for external heating. During periods without heating demand, the energy cannot be effectively utilized, resulting in substantial energy loss. Therefore, it is essential to develop an energy utilization system that can effectively participate in peak shaving and valley filling in all periods of the power grid. Summary of the Invention

[0003] Therefore, the present invention provides a combined cooling, heating and power system that combines an electric thermal storage device with an organic Rankine cycle. The system uses the electric thermal storage device to convert electrical energy during off-peak hours into thermal energy for storage, and provides heating, cooling and power to users when needed.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A combined cooling, heating, and power (CCHP) system integrating an electric thermal storage device and an organic Rankine cycle includes an electric thermal storage heat source system, an organic Rankine cycle power generation system, an absorption refrigeration system, and a circulating water heating system. The electric thermal storage heat source system is connected to the power grid to convert electrical energy into thermal energy and store it. The organic Rankine cycle power generation system is connected to the electric thermal storage heat source system to generate electricity using the thermal energy, and is also connected to the power grid and / or users to supply electricity. The absorption refrigeration system is connected to the electric thermal storage heat source system and / or the organic Rankine cycle power generation system to provide cooling using the thermal energy, and is also connected to users to provide cooling. The circulating water heating system is connected to the electric thermal storage heat source system and / or the organic Rankine cycle power generation system to provide heating using the thermal energy, and is also connected to users to provide heating.

[0006] Furthermore, the electric thermal energy storage system includes an electric thermal energy storage device, and the organic Rankine cycle power generation system includes an organic working fluid evaporator, an expander, and a generator. The outlet of the electric thermal energy storage device is connected to the inlet of the organic working fluid evaporator, and the outlet of the organic working fluid evaporator is connected to the inlet of the electric thermal energy storage device. The working fluid outlet of the organic working fluid evaporator is connected to the air inlet of the expander, and the air outlet of the expander is connected to the working fluid inlet of the organic working fluid evaporator. The power output terminal of the expander is connected to the generator. The generator is connected to the power grid and / or the user to supply power.

[0007] Furthermore, the electric thermal energy storage system also includes a circulating water pump, which is connected in series at the water inlet of the electric thermal energy storage device.

[0008] Furthermore, the absorption refrigeration system includes an absorption chiller unit, wherein the hot water inlet of the absorption chiller unit is connected to the outlet of the electric thermal storage device and / or the outlet of the organic working fluid evaporator, and the hot water outlet of the absorption chiller unit is connected to the inlet of the electric thermal storage device; the refrigerant outlet of the absorption chiller unit is connected to the user's refrigerant inlet, and the refrigerant inlet of the absorption chiller unit is connected to the user's refrigerant outlet.

[0009] Furthermore, the organic Rankine cycle power generation system also includes a condenser, the air inlet of which is connected to the air outlet of the expander, and the liquid outlet of which is connected to the working fluid inlet of the organic working fluid evaporator; the first water inlet of the circulating water heating system is connected to the water outlet of the electric thermal storage device and / or the water outlet of the condenser, and the first water outlet of the circulating water heating system is connected to the user's water inlet; the second water inlet of the circulating water heating system is connected to the user's water outlet, and the second water outlet of the circulating water heating system is connected to the water inlet of the electric thermal storage device and / or the water inlet of the condenser.

[0010] Furthermore, the organic Rankine cycle power generation system also includes a gas-liquid separator, a storage tank, and a working fluid pump; the working fluid inlet of the gas-liquid separator is connected to the working fluid outlet of the organic working fluid evaporator, and the gas outlet of the gas-liquid separator is connected to the gas inlet of the expander; the liquid inlet of the storage tank is connected to the liquid outlet of the condenser, and the liquid outlet of the storage tank is connected to the liquid inlet of the working fluid pump; the working fluid pump is connected in series with the working fluid inlet of the organic working fluid evaporator.

[0011] Furthermore, a refrigerant circulation pump is connected in series on the pipeline between the refrigerant inlet of the absorption chiller unit and the refrigerant outlet of the user, and a heating circulation pump is connected in series on the pipeline between the user's water outlet and the water inlet of the condenser.

[0012] Furthermore, the combined cooling, heating and power system also includes a circulating water cooling system, which is connected to the absorption refrigeration system and / or the organic Rankine cycle power generation system to provide cooling water.

[0013] Furthermore, the circulating water cooling system includes a cooling tower and a cooling water circulating pump; the inlet of the cooling tower is connected to the outlet of the condenser and / or the cold water outlet of the absorption cooling unit, and the outlet of the cooling tower is connected to the inlet of the condenser and / or the cold water inlet of the absorption cooling unit; the cooling water circulating pump is connected in series to the outlet of the cooling tower.

[0014] Furthermore, valves for controlling the on / off state are installed on the pipelines between the electric thermal energy storage system, the organic Rankine cycle power generation system, the absorption refrigeration system, the circulating water heating system, and the circulating water cooling system.

[0015] The present invention has the following advantages:

[0016] The electric thermal storage device and organic Rankine cycle combined cooling, heating, and power (CHP) system provided by this invention can utilize curtailed wind and solar power or off-peak electricity as energy supply, converting electrical energy into thermal energy for storage. During peak electricity demand periods or at suitable times, it provides cooling, heating, and electricity to users, effectively alleviating grid peak-shaving pressure. The electric thermal storage device acts as a heat source. Through the principle of energy cascade utilization, the organic working fluid absorbs heat from the heat source in the organic working fluid evaporator, vaporizes, and then enters the expander to drive the generator to produce electricity. After completing its work, the low-temperature, low-pressure working fluid enters the condenser to heat the return water for heating. The heat from the heat source exits the organic working fluid evaporator and enters the absorption chiller unit, thus providing a cooling source for users. By controlling the valves on the pipeline, each system can operate independently or in combination, depending on the actual situation. This allows for independent or simultaneous supply of cooling, heating, and electricity to users, and the generated electricity can also be transmitted back to the grid. This not only effectively alleviates grid pressure, smooths peak demand and fills valleys, and maintains grid stability, but also efficiently absorbs curtailed wind and solar power and off-peak electricity, improving energy utilization efficiency. Attached Figure Description

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0019] Figure 1 This is a schematic diagram of a combined cooling, heating and power system that integrates an electric thermal storage device with an organic Rankine cycle, as provided in an embodiment of the present invention.

[0020] In the diagram: 1-Power grid, 2-Electric thermal storage equipment, 3-Circulating water pump, 4-Organic working fluid evaporator, 5-Gas-liquid separator, 6-Expander, 7-Generator, 8-Condenser, 9-Storage tank, 10-Working fluid pump, 11-Absorption refrigeration unit, 12-Refrigerant circulating pump, 13-Cooling water circulating pump, 14-Cooling tower, 15-User, 16-Heating circulating pump, 17.1-First valve, 17.2-Second valve, 17.3-Third valve, 17.4-Fourth valve, 17.5-Fifth valve, 17.6-Sixth valve, 17.7-Seventh valve, 17.8-Eighth valve, 17.9-Ninth valve, 17.10-Tenth valve, 17.11-Eleventh valve, 17.12-Twelfth valve, 1 7.13 - Thirteenth valve, 17.4 - Fourteenth valve, 17.5 - Fifteenth valve, 17.6 - Sixteenth valve, 17.7 - Seventeenth valve, 18.1 - First pipeline, 18.2 - Second pipeline, 18.3 - Third pipeline, 18.4 - Fourth pipeline, 18.5 - Fifth pipeline, 18.6 - Sixth pipeline, 18.7 - Seventh pipeline, 18.8 - Eighth pipeline, 18.9 - Ninth pipeline, 18.10 - Tenth pipeline, 18.11 - Eleventh pipeline, 18.12 - Twelfth pipeline, 18.13 - Thirteenth pipeline, 18.14 - Fourteenth pipeline, 18.15 - Fifteenth pipeline, 18.16 - Sixteenth pipeline, 18.17 - Seventeenth pipeline, 18.18 - Eighteenth pipeline. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0023] like Figure 1 As shown, this embodiment provides a combined cooling, heating, and power (CCHP) system integrating an electric thermal storage device with an organic Rankine cycle. The system includes an electric thermal storage heat source system, an organic Rankine cycle power generation system, an absorption refrigeration system, a circulating water heating system, a circulating water cooling system, and several pipes and valves. The electric thermal storage heat source system is connected to the power grid 1 to convert electrical energy into heat energy and store it. The organic Rankine cycle power generation system is connected to the electric thermal storage heat source system to generate electricity using the heat energy, and is also connected to the power grid 1 and / or user 15 to supply electricity. The absorption refrigeration system is connected to the electric thermal storage heat source system and / or the organic Rankine cycle power generation system to provide cooling using the heat energy, and is also connected to user 15 to provide cooling. The circulating water heating system is connected to the electric thermal storage heat source system and / or the organic Rankine cycle power generation system to provide heating using the heat energy, and is also connected to user 15 to provide heating. The circulating water cooling system is connected to the absorption refrigeration system and / or the organic Rankine cycle power generation system to provide cooling water.

[0024] The electric thermal energy storage system includes an electric thermal energy storage device 2 and a circulating water pump 3. The organic Rankine cycle power generation system includes an organic working fluid evaporator 4, a gas-liquid separator 5, an expander 6, a generator 7, a condenser 8, a liquid storage tank 9, and a working fluid pump 10. The absorption refrigeration system includes an absorption chiller unit 11 and a refrigerant circulating pump 12. The circulating water heating system includes a heating circulating pump 16. The circulating water cooling system includes a cooling tower 14 and a cooling water circulating pump 13. Preferably, the electric thermal energy storage device 2 can provide high-temperature hot water, and the heat source temperature is adjustable. The absorption chiller unit 11 is preferably a single-effect lithium bromide chiller unit. The design evaporation temperature of the organic working fluid in the organic Rankine cycle power generation system can exceed 90℃. The heat source temperature after heat exchange in the organic working fluid evaporator 4 is designed to be around 80℃, meeting the operating conditions of the single-effect lithium bromide chiller unit. The condensation temperature is designed to be around 40℃, and the return water temperature of the condenser 8 is suitable for heating in most areas.

[0025] The outlet of the electric thermal storage device 2 is connected to the inlet of the organic working fluid evaporator 4 via a first pipe 18.1, and a second valve 17.2 is connected in series on the first pipe 18.1. The outlet of the organic working fluid evaporator 4 is connected to the hot water inlet of the absorption chiller unit 11 via the second pipe 18.2. A third valve 17.3, a fourth valve 17.4, and a fifth valve 17.5 are connected in series on the second pipe 18.2. The hot water outlet of the absorption chiller unit 11 is connected to the inlet of the electric thermal storage device 2 via a third pipe 18.3, and a seventh valve 17.7 and a circulating water pump 3 are connected in series on the third pipe 18.3.

[0026] The working fluid outlet of the organic working fluid evaporator 4 is connected to the working fluid inlet of the gas-liquid separator 5 through the fourth pipe 18.4. The gas outlet of the gas-liquid separator 5 is connected to the gas inlet of the expander 6 through the fifth pipe 18.5. The power output end of the expander 6 is connected to the generator 7. The generator 7 is connected to the power grid 1 and / or the user 15 to supply power. The gas outlet of the expander 6 is connected to the gas inlet of the condenser 8 through the sixth pipe 18.6. The liquid outlet of the condenser 8 is connected to the liquid inlet of the storage tank 9 through the seventh pipe 18.7. The liquid outlet of the storage tank 9 is connected to the liquid inlet of the working fluid pump 10 through the eighth pipe 18.8. The working fluid pump 10 is connected in series on the eighth pipe 18.8.

[0027] The refrigerant outlet of the absorption chiller unit 11 is connected to the refrigerant inlet of the user 15 through the ninth pipe 18.9, and the refrigerant inlet of the absorption chiller unit 11 is connected to the refrigerant outlet of the user 15 through the tenth pipe 18.10. A refrigerant circulation pump 12 is connected in series on the tenth pipe 18.10.

[0028] The outlet of the condenser 8 is connected to the inlet of the user 15 through the eleventh pipe 18.11. The twelfth valve 17.12 and the fourteenth valve 17.14 are connected in series on the eleventh pipe 18.11. The outlet of the user 15 is connected to the inlet of the condenser 8 through the twelfth pipe 18.12. The heating circulation pump 16, the fifteenth valve 17.15 and the thirteenth valve 17.13 are connected in series on the twelfth pipe 18.12.

[0029] The inlet of cooling tower 14 is connected to the cold water outlet of absorption chiller unit through thirteenth pipe 18.13, and eleventh valve 17.11 and sixteenth valve 17.16 are connected in series on thirteenth pipe 18.13; the outlet of cooling tower 14 is connected to the cold water inlet of absorption chiller unit through fourteenth pipe 18.14, and cooling water circulation pump 13, seventeenth valve 17.17 and tenth valve 17.10 are connected in series on fourteenth pipe 18.14.

[0030] The system also includes a fifteenth pipe 18.15 and a sixteenth pipe 18.16. The first end of the fifteenth pipe 18.15 is connected to the first pipe 18.1, with the connection point located upstream of the second valve 17.2; the second end of the fifteenth pipe 18.15 is connected to the eleventh pipe 18.11, with the connection point between the twelfth valve 17.12 and the fourteenth valve 17.14; the first valve 17.1 and the eighth valve 17.8 are connected in series on the fifteenth pipe 18.15; the fifteenth pipe 18.15 is connected to the second pipe 18.2, with the connection point between the first valve 17.1 and the eighth valve 17.8 of the fifteenth pipe 18.15, and between the third valve 17.3 and the fourth valve 17.4 of the second pipe 18.2. The first end of the sixteenth pipe 18.16 is connected to the twelfth pipe 18.12, with the connection point between the fifteenth valve 17.15 and the thirteenth valve 17.13; the second end of the sixteenth pipe 18.16 is connected to the third pipe 18.3, with the connection point between the seventh valve 17.7 and the circulating water pump 3; the ninth valve 17.9 and the sixth valve 17.6 are connected in series on the sixteenth pipe 18.16; the sixteenth pipe 18.16 is connected to the second pipe 18.2, with the connection point between the ninth valve 17.9 and the sixth valve 17.6 of the sixteenth pipe 18.16, and between the fourth valve 17.4 and the fifth valve 17.5 of the second pipe 18.2.

[0031] The system also includes a seventeenth pipe 18.17 and an eighteenth pipe 18.18. The first end of the seventeenth pipe 18.17 connects to the fourteenth pipe 18.14, with the connection point located between the seventeenth valve 17.17 and the tenth valve 17.10; the second end of the seventeenth pipe 18.17 connects to the twelfth pipe 18.12, with the connection point located between the fifteenth valve 17.15 and the thirteenth valve 17.13. The first end of the eighteenth pipe 18.18 connects to the thirteenth pipe 18.13, with the connection point located between the sixteenth valve 17.16 and the eleventh valve 17.11; the second end of the eighteenth pipe 18.18 connects to the ninth pipe 18.9, with the connection point located between the twelfth valve 17.12 and the fourteenth valve 17.14.

[0032] Generally, "in sequence" in the above text refers to the direction of gas or liquid flow, with the first end referring to the inlet and the second end referring to the outlet.

[0033] During non-cooling and non-heating seasons, the power supply of the electric thermal storage device 2 is turned on during off-peak electricity hours, and the electrical energy is converted into thermal energy and stored. During peak electricity consumption periods, the circulating water pump 3 is turned on to provide thermal energy to the outside world. At this time, the absorption refrigeration system and the circulating water heating system do not work, and the organic Rankine cycle power generation system generates electricity for users 15 or directly connects to the power grid 1.

[0034] During the heating season, when there is no electricity, the power supply of the electric thermal storage device 2 is turned on to convert electrical energy into thermal energy and store it. When heat is needed, close valves 17.1, 17.5, 17.7, 17.8, 17.9, 17.10, 17.11, 17.16, and 17.17. Open valves 17.2, 17.3, 17.4, 17.6, 17.12, 17.13, 17.14, and 17.15. Start the heating circulation pump 16 and the circulating water pump 3 to provide heat energy. The circulating hot water flows through the organic working fluid evaporator 4 to heat the organic working fluid. After the organic working fluid is vaporized, it passes through the gas-liquid separator 5 and enters the expander 6, which drives the expander 6 to do work and transmits the work to the generator 7 to generate electricity for the user 15 or directly connect to the power grid 1. The organic working fluid passing through expander 6 enters condenser 8 and is cooled by the cooling water flowing through condenser 8. The cooling water is then heated and enters the circulating water heating system to provide heat to user 15. The heating circulating water is powered by heating circulating pump 16. The organic working fluid exiting condenser 8 enters storage tank 9 and re-enters the power generation cycle via working fluid pump 10. The circulating hot water exiting organic working fluid evaporator 4 is reheated by returning to the electric thermal storage device. During this process, the circulating hot water does not flow through absorption chiller unit 11. When the heating load of user 15 decreases and cannot meet the cooling demand of condenser 8, valves 16.16 and 17.17 are opened, and cooling water circulating pump 13 is activated. By controlling and regulating, a portion of the water exiting condenser 8 enters cooling tower 14 for cooling and then recirculates. In extreme cases, if user 15's heating demand is too high and the heat released by condenser 8 cannot meet the demand, the power generation system needs to be shut down. This requires closing valves 17.2, 17.3, 17.4, 17.5, 17.7, 17.10, 17.11, 17.12, 17.13, 17.16, and 17.17, and opening valves 17.1, 17.6, 17.8, 17.9, 17.14, and 17.15. The electric thermal storage device 2 will then directly supply heat to user 15. Circulating hot water will flow directly from the electric thermal storage device 2 into the circulating water heating system to heat user 15, and then return directly to the electric thermal storage device 2 to ensure user 15's safety needs. During this process, neither the organic Rankine cycle power generation system nor the absorption refrigeration system will operate.

[0035] During the cooling season, when there is no electricity, the power supply to the electric thermal storage device 2 is turned on, and the electrical energy is converted into thermal energy and stored. When cooling is required, close valves 17.1, 17.6, 17.8, 17.9, 17.14, and 17.15. Open valves 17.2, 17.3, 17.4, 17.5, 17.7, 17.10, 17.11, 17.12, 17.13, 17.16, and 17.17. Start cooling water circulation pump 13, refrigerant circulation pump 12, and circulating water pump 3 to provide heat energy. Circulating hot water flows through organic working fluid evaporator 4 to heat the organic working fluid, causing it to vaporize. After vaporization, the organic working fluid passes through gas-liquid separator 5 and enters expander 6, driving expander 6 to perform work and transmitting it to generator 7 to generate electricity for user 15 or directly into the power grid 1. The organic working fluid passing through expander 6 enters condenser 8 and is cooled by cooling water flowing through condenser 8. The cooling water is heated and sent to cooling tower 14 for further cooling. The circulating cooling water is powered by cooling water circulation pump 13. The organic working fluid exiting condenser 8 enters storage tank 9 and re-enters the power generation cycle via working fluid pump 10. The circulating hot water exiting organic working fluid evaporator 4 enters absorption chiller unit 11. The absorption chiller unit 11 is used to provide cooling for user 15. The cooling water from absorption chiller unit 11 flows into cooling tower 14 for cooling and then flows back into absorption chiller unit 11 via cooling water circulation pump 13, forming a cycle. The refrigerant provides cooling for user 15 via refrigerant circulation pump 12. The circulating hot water exiting absorption chiller unit 11 returns to electric thermal storage device 2 for reheating. The heating cycle system is not in operation. When only cooling is needed for user 15, the power generation system is shut down, and valves 17.2, 17.3, 17.6, 17.8, 17.9, 17.12, 17.13, 17.14, and 17.15 are closed. Valve 17.1, 17.4, 17.5, 17.7, 17.10, 17.11, 17.16, and 17.17 are opened. The circulating hot water flows directly into the absorption chiller unit 11, thus providing cooling for user 15. At this time, the organic Rankine cycle power generation system is not operating.

[0036] The combined cooling, heating, and power (CCHP) system integrating the electric thermal storage device and the organic Rankine cycle provided in this embodiment can utilize curtailed wind and solar power or off-peak electricity as energy supply, converting electrical energy into thermal energy for storage, and providing cooling, heating, and electricity to users during peak electricity consumption periods or at suitable times, effectively alleviating the pressure on the power grid for peak regulation. The electric thermal storage device 2 serves as a heat source. Through the principle of energy cascade utilization, the organic working fluid absorbs heat from the heat source and vaporizes in the organic working fluid evaporator 4. It then enters the expander 6 to perform work, driving the generator 7 to generate electricity. After performing work, the low-temperature, low-pressure working fluid enters the condenser 8 to heat the return water for heating. The heat from the heat source exits from the organic working fluid evaporator 5 and enters the absorption chiller unit 11, thereby providing a cooling source for users. By controlling the valves on the pipeline, each system can operate independently or in combination, depending on the actual situation. This allows for the independent or simultaneous supply of cooling, heating, and electricity to users. The generated electricity can also be transmitted to the power grid, which can not only effectively alleviate grid pressure, reduce peak loads and fill valleys, and maintain grid stability, but also efficiently absorb abandoned wind and solar power and off-peak electricity, thereby improving energy utilization.

[0037] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A combined cooling, heating, and power system integrating an electric thermal storage device with an organic Rankine cycle, characterized in that, It includes an electric thermal energy storage system, an organic Rankine cycle power generation system, an absorption refrigeration system, and a circulating water heating system; the electric thermal energy storage system is connected to the power grid to convert electrical energy into thermal energy and store it; the organic Rankine cycle power generation system is connected to the electric thermal energy storage system to generate electricity using thermal energy, and the organic Rankine cycle power generation system is connected to the power grid and / or users to supply electricity. The absorption refrigeration system is connected to the electric thermal energy storage system and / or the organic Rankine cycle power generation system to utilize thermal energy for cooling, and the absorption refrigeration system is connected to the user for cooling; the circulating water heating system is connected to the electric thermal energy storage system and / or the organic Rankine cycle power generation system to utilize thermal energy, and the circulating water heating system is connected to the user for heating. The electric thermal energy storage system includes an electric thermal energy storage device. The organic Rankine cycle power generation system includes an organic working fluid evaporator, an expander, and a generator. The outlet of the electric thermal energy storage device is connected to the inlet of the organic working fluid evaporator via a first pipe. A second valve is connected in series on the first pipe. The outlet of the organic working fluid evaporator is connected to the inlet of the electric thermal energy storage device. The working fluid outlet of the organic working fluid evaporator is connected to the air inlet of the expander. The air outlet of the expander is connected to the working fluid inlet of the organic working fluid evaporator. The power output terminal of the expander is connected to the generator. The generator is connected to the power grid and / or users to supply power. The absorption refrigeration system includes an absorption chiller unit. The hot water inlet of the absorption chiller unit is connected to the outlet of the electric thermal storage device and / or the outlet of the organic working fluid evaporator. The hot water outlet of the absorption chiller unit is connected to the inlet of the electric thermal storage device. The refrigerant outlet of the absorption chiller unit is connected to the user's refrigerant inlet. The refrigerant inlet of the absorption chiller unit is connected to the user's refrigerant outlet. The organic Rankine cycle power generation system further includes a condenser, the air inlet of which is connected to the air outlet of the expander, and the liquid outlet of which is connected to the working fluid inlet of the organic working fluid evaporator; the first water inlet of the circulating water heating system is connected to the water outlet of the electric thermal storage device and / or the water outlet of the condenser, and the first water outlet of the circulating water heating system is connected to the user's water inlet; the second water inlet of the circulating water heating system is connected to the user's water outlet, and the second water outlet of the circulating water heating system is connected to the water inlet of the electric thermal storage device and / or the water inlet of the condenser; The condenser outlet is connected to the user's inlet via the eleventh pipe, and the twelfth and fourteenth valves are connected in series on the eleventh pipe; the user's outlet is connected to the condenser inlet via the twelfth pipe, and the fifteenth and thirteenth valves are connected in series on the twelfth pipe. The outlet of the organic working fluid evaporator is connected to the hot water inlet of the absorption chiller through a second pipe, on which a third valve, a fourth valve, and a fifth valve are connected in series. The hot water outlet of the absorption chiller is connected to the inlet of the electric thermal storage device through a third pipe, on which a seventh valve and a circulating water pump are connected in series. The system also includes a fifteenth pipe and a sixteenth pipe; the first end of the fifteenth pipe is connected to the first pipe, with the connection point located upstream of the second valve; the second end of the fifteenth pipe is connected to the eleventh pipe, with the connection point between the twelfth and fourteenth valves; the first valve and the eighth valve are connected in series on the fifteenth pipe; the fifteenth pipe and the second pipe are connected, with the connection point between the first and eighth valves of the fifteenth pipe, and between the third and fourth valves of the second pipe; the first end of the sixteenth pipe is connected to the twelfth pipe, with the connection point between the fifteenth and thirteenth valves; the second end of the sixteenth pipe is connected to the third pipe, with the connection point between the seventh valve and the circulating water pump; the ninth valve and the sixth valve are connected in series on the sixteenth pipe; the sixteenth pipe and the second pipe are connected, with the connection point between the ninth and sixth valves of the sixteenth pipe, and between the fourth and fifth valves of the second pipe.

2. The combined cooling, heating and power system according to claim 1, characterized in that, The electric thermal energy storage system also includes a circulating water pump, which is connected in series at the water inlet of the electric thermal energy storage device.

3. The combined cooling, heating and power system according to claim 1, characterized in that, The organic Rankine cycle power generation system further includes a gas-liquid separator, a storage tank, and a working fluid pump; the working fluid inlet of the gas-liquid separator is connected to the working fluid outlet of the organic working fluid evaporator, and the gas outlet of the gas-liquid separator is connected to the gas inlet of the expander; the liquid inlet of the storage tank is connected to the liquid outlet of the condenser, and the liquid outlet of the storage tank is connected to the liquid inlet of the working fluid pump; the working fluid pump is connected in series with the working fluid inlet of the organic working fluid evaporator.

4. The combined cooling, heating and power system according to claim 3, characterized in that, A refrigerant circulation pump is connected in series on the pipeline between the refrigerant inlet of the absorption chiller unit and the refrigerant outlet of the user, and a heating circulation pump is connected in series on the pipeline between the user's water outlet and the water inlet of the condenser.

5. The combined cooling, heating and power system according to any one of claims 1-4, characterized in that, The combined cooling, heating and power system also includes a circulating water cooling system, which is connected to the absorption refrigeration system and / or the organic Rankine cycle power generation system to provide cooling water.

6. The combined cooling, heating and power system according to claim 5, characterized in that, The circulating water cooling system includes a cooling tower and a cooling water circulating pump; the inlet of the cooling tower is connected to the outlet of the condenser and / or the cold water outlet of the absorption cooling unit, and the outlet of the cooling tower is connected to the inlet of the condenser and / or the cold water inlet of the absorption cooling unit; the cooling water circulating pump is connected in series to the outlet of the cooling tower.

7. The combined cooling, heating and power system according to claim 5, characterized in that, Valves for controlling the on / off state are installed on the pipelines between the electric thermal energy storage system, the organic Rankine cycle power generation system, the absorption refrigeration system, the circulating water heating system, and the circulating water cooling system.

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