A wind-driven multi-energy complementary Carnot battery system

Abstract

The present application relates to a wind-driven multi-energy complementary Carnot battery system, which includes a heat pump module, a wind energy utilization module, an organic Rankine cycle power generation module, a solar energy utilization module, and a water storage heat exchange module. The output end of the wind energy utilization module is connected to the input end of the heat pump module, the input end and the output end of the solar energy utilization module are both connected to the heat pump module, the output end of the heat pump module is connected to the water storage heat exchange module, the water storage heat exchange module is connected to the organic Rankine cycle power generation module, the heat pump module, the wind energy utilization module, and the water storage heat exchange module are used to operate the air source energy storage mode, the heat pump module, the wind energy utilization module, the solar energy utilization module, and the water storage heat exchange module are used to operate the solar energy storage mode when the solar radiation intensity is greater than a preset value, and the organic Rankine cycle power generation module operates the power generation mode. The present application has the effect of improving the energy utilization rate of the Carnot battery system and enhancing the reliability and adaptability of the Carnot battery energy system.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage, and in particular to a wind-driven multi-energy complementary Carnot battery system. Background Art

[0002] With the continuous growth of global energy demand and the improvement of environmental protection awareness, the development of renewable energy technology has received widespread attention. In order to solve the above problems, the development and utilization of renewable energy has become an important part of the transformation of the global energy structure.

[0003] However, the instability, intermittency and geographical limitations of renewable energy pose challenges to its large-scale application. Therefore, it is crucial to build a feasible energy storage system to improve the efficiency and flexibility of renewable energy.

[0004] The Carnot battery is an idealized energy storage system concept. It is based on the Carnot cycle principle in thermodynamics and aims to achieve higher energy conversion efficiency in theory. However, the Carnot battery system needs to rely on electrical energy to drive during operation, and its electrical conversion efficiency is low, resulting in poor performance in terms of economy and feasibility. How to improve the electrical-to-electrical conversion efficiency of the Carnot battery system is an urgent problem to be solved. Summary of the invention

[0005] In order to improve the energy utilization rate of the Kanot battery system and enhance the reliability and adaptability of the Kanot battery energy system, the present application provides a wind direct-driven multi-energy complementary Kanot battery system.

[0006] The above-mentioned invention objective of the present application is achieved through the following technical solutions:

[0007] A wind-driven multi-energy complementary Carnot battery system comprises: a heat pump module, a wind energy utilization module, an organic Rankine cycle power generation module, a solar energy utilization module and a water storage heat exchange module, wherein the output end of the wind energy utilization module is connected to the input end of the heat pump module, the output end of the solar energy utilization module is connected to the heat pump module, the output end of the heat pump module is connected to the water storage heat exchange module, the water storage heat exchange module is connected to the organic Rankine cycle power generation module, the heat pump module, the wind energy utilization module and the water storage heat exchange module are used to operate in an air source energy storage mode, the heat pump module, the wind energy utilization module, the solar energy utilization module and the water storage heat exchange module are used in a solar energy storage mode, and the organic Rankine cycle power generation module operates in a power generation mode.

[0008] Furthermore, the heat pump module includes a second water-cooled heat exchanger, a compressor, a regenerator, a first expansion valve, a second expansion valve, a first air-cooled heat exchanger and a first water-cooled heat exchanger. The output end of the wind energy utilization module is connected to the compressor, and the second water-cooled heat exchanger is respectively connected to the water storage heat exchange module, the regenerator and the output end of the compressor; the input end of the compressor is connected to the output end of the regenerator, the first air-cooled heat exchanger and the first water-cooled heat exchanger are connected in parallel and then connected to the regenerator, the first expansion valve is connected in series with the first air-cooled heat exchanger, and the second expansion valve is connected in series with the first water-cooled heat exchanger.

[0009] Furthermore, the wind energy utilization module includes a wind turbine and a gearbox, the wind turbine is connected to the gearbox, and the gearbox is connected to the input end of the compressor.

[0010] Furthermore, the solar energy utilization module includes a solar energy collector and a first water pump. The solar energy collector and the first water pump are connected in series and then connected to the first water-cooled heat exchanger.

[0011] Furthermore, the organic Rankine cycle power generation module includes a third water-cooled heat exchanger, a working fluid pump, a cooling tower and an expander, the third water-cooled heat exchanger is connected to the water storage heat exchange module, the third water-cooled heat exchanger is connected to the output end of the working fluid pump, the input end of the working fluid pump is connected to the cooling tower, the cooling tower is connected to the input end of the expander, and the output end of the expander (12) is connected to the third water-cooled heat exchanger.

[0012] Further, the water storage and heat exchange module includes a first water tank, a second water tank, a first switch valve, a second switch valve, a third water pump and a fourth water pump, the first water tank is connected to the second water-cooled heat exchanger, the first water tank is connected to the first switch valve, the first switch valve is connected to the third water pump, the third water pump is connected to the third water-cooled heat exchanger, the fourth water pump is connected to the second water-cooled heat exchanger, the fourth water pump is connected to the second switch valve, the second switch valve is connected to the second water tank, and the second water tank is connected to the third water-cooled heat exchanger.

[0013] Furthermore, the water temperature in the second water storage tank is set to 90°C to 150°C; the water temperature in the first water storage tank is set to 80°C to 145°C.

[0014] Furthermore, the second water-cooled heat exchanger includes a condenser, and the condensation temperature of the condenser is set to 100°C to 155°C.

[0015] Furthermore, the types of working fluids used include R744, R32, R134a, R290, R1233zd, and R1234yf; the types of the first expansion valve and the second expansion valve include an electronic expansion valve and a thermal expansion valve; the compressor includes a scroll compressor, a screw compressor, a rotor compressor, and a magnetic levitation compressor; the expander includes a scroll expander, a screw expander, and a rotor expander; the solar collector includes a trough solar collector, a flat-plate solar collector, and a vacuum tube solar collector.

[0016] Furthermore, the operation start and stop control of the air source energy storage mode and the solar energy storage mode includes:

[0017] The measured values ​​of the evaporator water inlet of the first water-cooled heat exchanger in the unit cycle are combined into a time series : ;

[0018] in, express cycles;

[0019] The first Cycle Add up item by item to get the The accumulated value of each cycle , and The accumulated values ​​of the periods constitute the time series ,as follows:

[0020] ;

[0021] ;

[0022] in, ;

[0023] Calculate the Predicted temperature of the evaporator inlet of the first water-cooled heat exchanger in the cycle :

[0024] ;

[0025] in:

[0026] ;

[0027] ;

[0028] ;

[0029] ;

[0030] ;

[0031] The measured values ​​of the evaporator air inlet of the first air-cooled heat exchanger in the unit cycle are combined into a time series : ;

[0032] The first Cycle Add up item by item to get the The accumulated value of each cycle , and The accumulated values ​​of the periods constitute the time series ,as follows:

[0033] ; ;

[0034] Calculate the Predicted temperature at the evaporator inlet of the first air-cooled heat exchanger in the cycle :

[0035] ;

[0036] in:

[0037] ;

[0038] ;

[0039] ;

[0040] ;

[0041] ;

[0042] when When the temperature is low, the air source heating mode is operated, otherwise the solar heating mode is operated.

[0043] In summary, the present application includes at least one of the following beneficial technical effects:

[0044] 1. By integrating wind energy, solar energy and other forms of renewable energy, efficient energy conversion and storage are achieved. This system not only improves energy utilization and reduces dependence on fossil fuels, but also enhances the reliability and adaptability of the energy system, which is of great significance for promoting the development and application of renewable energy technology;

[0045] 2. Wind energy is volatile. The present invention can be used to convert wind energy into thermal energy and store it. The stored thermal energy can be converted into electrical energy during the peak period of electricity consumption on the day, thereby achieving peak shaving and valley filling and enhancing power supply security.

[0046] 3. The use of efficient wind turbines can directly drive the generators connected to them, thus avoiding the gearbox and other mechanical transmission devices required in traditional wind power generation systems. By adjusting the gearbox, it can adapt to different wind speed conditions and improve energy capture efficiency;

[0047] 4. An efficient solar energy utilization module is integrated to capture solar energy and convert it into thermal energy. This achieves efficient coupling of solar energy and air energy and improves the efficient utilization of renewable energy;

[0048] 5. The compressor in the heat pump module is directly connected to the wind energy utilization module, and the mechanical energy generated by the wind turbine is used to directly drive the compressor in the heat pump, reducing the energy conversion path and improving system performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a schematic diagram of an embodiment of a wind-powered direct-driven multi-energy complementary Carnot battery system of the present application;

[0050] Explanation of the reference numerals in the accompanying drawings: 1. second water-cooled heat exchanger; 2. compressor; 3. regenerator; 4. first expansion valve; 5. first air-cooled heat exchanger; 6. wind turbine; 7. gearbox; 8. second expansion valve; 9. first water-cooled heat exchanger; 10. first water pump; 11. solar collector; 12. expander; 13. cooling tower; 14. second switch valve; 15. fourth water pump; 16. first water storage tank; 17. first switch valve; 18. second water storage tank; 19. third water pump; 20. third water-cooled heat exchanger; 23. working fluid pump. DETAILED DESCRIPTION

[0051] The following is combined with Figure 1 This application is described in further detail.

[0052] In one embodiment, if Figure 1 As shown, the present application discloses a wind direct-driven multi-energy complementary Carnot battery system, specifically comprising:

[0053] It includes a heat pump module, a wind energy utilization module, an organic Rankine cycle power generation module, a solar energy utilization module and a water storage heat exchange module. The output end of the wind energy utilization module is connected to the input end of the heat pump module, the input end and output end of the solar energy utilization module are both connected to the heat pump module, the output end of the heat pump module is connected to the water storage heat exchange module, and the water storage heat exchange module is connected to the organic Rankine cycle power generation module.

[0054] It includes three operation modes. When the electricity price is at a low point, the energy storage mode is operated. When the electricity price is at a peak point, the system operates in the power generation mode. There are two types of energy storage modes, namely air source energy storage mode and solar energy storage mode. The heat pump module, wind energy utilization module and water storage heat exchange module are used to operate the air source energy storage mode, the heat pump module, wind energy utilization module, solar energy utilization module and water storage heat exchange module are used for the solar energy storage mode, and the organic Rankine cycle power generation module operates in the power generation mode.

[0055] The heat pump module includes a second water-cooled heat exchanger 1, a compressor 2, a regenerator 3, a first expansion valve 4, a second expansion valve 8, a first air-cooled heat exchanger 5 and a first water-cooled heat exchanger 9. The output end of the wind energy utilization module is connected to the input end of the compressor 2, and the second water-cooled heat exchanger 1 is respectively connected to the water storage heat exchange module, the regenerator 3 and the output end of the compressor 2; the input end of the compressor 2 is connected to the output end of the regenerator 3, the first air-cooled heat exchanger 5 and the first water-cooled heat exchanger 9 are connected in parallel and then connected to the regenerator 3, the first expansion valve 4 is connected in series with the first air-cooled heat exchanger 5, and the second expansion valve 8 is connected in series with the first water-cooled heat exchanger 9; wherein, the second water-cooled heat exchanger 1 includes a condenser, and the condensing temperature of the condenser is set to 100°C to 155°C.

[0056] The wind energy utilization module includes a wind turbine 6 and a gearbox 7 . The wind turbine 6 is connected to the gearbox 7 , and the gearbox 7 is connected to the input end of the compressor 2 .

[0057] The solar energy utilization module includes a solar collector 11 and a first water pump 10 . The solar collector 11 is connected to the first water pump 10 . The first water pump 10 is connected to the first water-cooled heat exchanger 9 . The other end of the solar collector 11 is connected to the first water-cooled heat exchanger 9 .

[0058] The organic Rankine cycle power generation module includes a third water-cooled heat exchanger 20, a working fluid pump 23, a cooling tower 13 and an expander 12. The third water-cooled heat exchanger 20 is connected to the water storage heat exchange module, the third water-cooled heat exchanger 20 is connected to the output end of the working fluid pump 23, the input end of the working fluid pump 23 is connected to the cooling tower 13, the cooling tower 13 is connected to the input end of the expander 12, and the output end of the expander 12 is connected to the third water-cooled heat exchanger 20.

[0059] The water storage and heat exchange module includes a first water storage tank 16, a second water storage tank 18, a first switch valve 17, a second switch valve 14, a third water pump 19 and a fourth water pump 15. The first water storage tank 16 is connected to the second water-cooled heat exchanger 1, the first water storage tank 16 is connected to the first switch valve 17, the first switch valve 17 is connected to the third water pump 19, the third water pump 19 is connected to the third water-cooled heat exchanger 20, the fourth water pump 15 is connected to the second water-cooled heat exchanger 1, the fourth water pump 15 is connected to the second switch valve 14, the second switch valve 14 is connected to the second water storage tank 18, and the second water storage tank 18 is connected to the third water-cooled heat exchanger 20. The water temperature in the second water storage tank 18 is set to 90°C to 150°C. In other embodiments, the water temperature in the first water storage tank 16 is set to 80°C to 145°C.

[0060] When the air source energy storage mode is in operation, the wind turbine 6 is turned on, the inverter in the gearbox 7 is turned on, and the compressor 2 is turned on, and the wind energy directly provides driving force for the compressor 2. The first expansion valve 4 is turned on, the evaporator fan in the first air-cooled heat exchanger 5 is turned on, the refrigerant flows through the evaporator, and then flows through the regenerator 3 to heat the refrigerant at the inlet of the compressor 2. The high-temperature and high-pressure refrigerant at the outlet of the compressor 2 is turned on to complete the heat exchange in the second water-cooled heat exchanger 1, the fourth water pump 15 is turned on, the second switch valve 14 is turned on, and the low-temperature water enters the first water storage tank 16 from the second water storage tank 18 to complete the heat exchange.

[0061] When the system operates in solar energy storage mode, the wind turbine 6 is turned on, the inverter in the gearbox 7 is turned on, and the compressor 2 is turned on, and the wind energy directly provides driving force for the compressor 2. The second expansion valve 8 is turned on, the first water pump 10 is turned on, and the low-temperature water is heated by the solar collector 11 and enters the evaporator in the first water-cooled heat exchanger 9. The refrigerant flows through the evaporator and the regenerator 3 to heat the refrigerant at the inlet of the compressor 2. The high-temperature and high-pressure refrigerant at the outlet of the compressor 2 completes heat exchange in the second water-cooled heat exchanger 1, the fourth water pump 15 is turned on, the second switch valve 14 is turned on, and the low-temperature water enters the first water storage tank 16 from the second water storage tank 18 to complete heat exchange.

[0062] The operation start and stop control of the air source energy storage mode and the solar energy storage mode includes:

[0063] The measured values ​​of the evaporator water inlet of the first water-cooled heat exchanger 9 in a unit cycle are combined into a time series :

[0064] ;

[0065] in, express cycles;

[0066] The first Cycle Add up item by item to get the The accumulated value of each cycle , and The accumulated values ​​of the periods constitute the time series ,as follows:

[0067] ;

[0068] ;

[0069] in, ;

[0070] Calculate the The predicted temperature of the evaporator water inlet of the first water-cooled heat exchanger 9 of the cycle :

[0071] ;

[0072] in:

[0073] ;

[0074] ;

[0075] ;

[0076] ;

[0077] ;

[0078] The measured values ​​of the evaporator air inlet of the first air-cooled heat exchanger 5 in the unit cycle are combined into a time series : ;

[0079] The first Cycle Add up item by item to get the The accumulated value of each cycle , and The accumulated values ​​of the periods constitute the time series ,as follows:

[0080] ;

[0081] ;

[0082] Calculate the The predicted temperature of the evaporator air inlet of the first air-cooled heat exchanger 5 of the cycle : ;

[0083] in:

[0084] ;

[0085] ;

[0086] ;

[0087] ;

[0088] ;

[0089] when When the air source heating mode is used, the solar heating mode is used. is a parameter calculated by the above B, C, H, G matrices.

[0090] When the power generation mode is running, the first switch valve 17 is opened, the third water pump 19 is turned on, the hot water inside the first water storage tank 16 enters the third water-cooled heat exchanger 20 for heat exchange, the high-temperature refrigerant flows through the expansion machine 12 to generate electricity, and the low-temperature and low-pressure refrigerant is formed and then cooled in the cooling tower 13. The liquid refrigerant at the outlet of the cooling tower 13 enters the working fluid pump 23 and returns to the evaporator in the third water-cooled heat exchanger 20 for heating.

[0091] The types of working fluids used in the wind direct-driven multi-energy complementary Carnot battery system include but are not limited to R744, R32, R134a, R290, R1233zd, and R1234yf.

[0092] R744 usually refers to carbon dioxide (CO2).

[0093] R32 refers to difluoromethane (HFC-32).

[0094] R134a refers to tetrafluoroethane (HFC-134a).

[0095] R290 refers to propane.

[0096] R1233zd refers to a hydrofluorocarbon (HFO) refrigerant.

[0097] R1234yf also belongs to the hydrofluorocarbon (HFO) class of refrigerants.

[0098] Types of the first expansion valve 4 and the second expansion valve 8 include, but are not limited to, electronic expansion valves and thermal expansion valves, or capillary tubes.

[0099] The compressor 2 includes but is not limited to a scroll compressor 2, a screw compressor, a rotor compressor and a magnetic levitation compressor; the expander 12 includes but is not limited to a scroll expander, a screw expander, and a rotor expander.

[0100] The solar thermal collector 11 includes a trough solar thermal collector, a flat plate solar thermal collector and a vacuum tube solar thermal collector.

[0101] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any feature disclosed in this specification (including the abstract and drawings), unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

Claims

1. A wind-driven multi-energy complementary Carnot battery system, characterized in that: include: A heat pump module, a wind energy utilization module, an organic Rankine cycle power generation module, a solar energy utilization module and a water storage heat exchange module, wherein the output end of the wind energy utilization module is connected to the input end of the heat pump module, the output end of the solar energy utilization module is connected to the heat pump module, the output end of the heat pump module is connected to the water storage heat exchange module, the water storage heat exchange module is connected to the organic Rankine cycle power generation module, the heat pump module, the wind energy utilization module and the water storage heat exchange module are used to operate in an air source energy storage mode, the heat pump module, the wind energy utilization module, the solar energy utilization module and the water storage heat exchange module are used in a solar energy storage mode, and the organic Rankine cycle power generation module operates in a power generation mode; The heat pump module comprises a second water-cooled heat exchanger (1), a compressor (2), a regenerator (3), a first expansion valve (4), a second expansion valve (8), a first air-cooled heat exchanger (5) and a first water-cooled heat exchanger (9); the output end of the wind energy utilization module is connected to the compressor (2); the second water-cooled heat exchanger (1) is respectively connected to the water storage heat exchange module, the regenerator (3) and the output end of the compressor (2); the input end of the compressor (2) is connected to the output end of the regenerator (3); the first air-cooled heat exchanger (5) and the first water-cooled heat exchanger (9) are connected in parallel and then connected to the regenerator (3); the first expansion valve (4) and the first air-cooled heat exchanger (5) are connected in series; the second expansion valve (8) and the first water-cooled heat exchanger (9) are connected in series; The operation start and stop control of the air source energy storage mode and the solar energy storage mode includes: The measured values ​​of the evaporator water inlet of the first water-cooled heat exchanger (9) in a unit cycle are combined into a time series : ; in, express cycles; The first Cycle Add up item by item to get the The accumulated value of each cycle , and The accumulated values ​​of the periods constitute the time series ,as follows: ； ； in, ; Calculate the The predicted temperature of the evaporator water inlet of the first water-cooled heat exchanger (9) of the cycle : ； in, ; ； ； ； ； The measured values ​​of the evaporator air inlet of the first air-cooled heat exchanger (5) in a unit cycle are combined into a time series : ; The first Cycle Add up item by item to get the The accumulated value of each cycle , and The accumulated values ​​of the periods constitute the time series ,as follows: ； ； Calculate the The predicted temperature at the evaporator inlet of the first air-cooled heat exchanger (5) of the cycle : ; in, ; ； ； ； ； when When the temperature is low, the air source heating mode is operated, otherwise the solar heating mode is operated.

2. A wind power direct-driven multi-energy complementary Carnot battery system according to claim 1, characterized in that: The wind energy utilization module comprises a wind turbine (6) and a gearbox (7), wherein the wind turbine (6) is connected to the gearbox (7), and the gearbox (7) is connected to the input end of the compressor (2).

3. A wind power direct-driven multi-energy complementary Carnot battery system according to claim 2, characterized in that: The solar energy utilization module comprises a solar energy collector (11) and a first water pump (10); the solar energy collector (11) and the first water pump (10) are connected in series and then connected to a first water-cooled heat exchanger (9).

4. A wind-driven multi-energy complementary Carnot battery system according to claim 3, characterized in that: The organic Rankine cycle power generation module comprises a third water-cooled heat exchanger (20), a working fluid pump (23), a cooling tower (13) and an expander (12); the third water-cooled heat exchanger (20) is connected to the water storage heat exchange module; the third water-cooled heat exchanger (20) is connected to the output end of the working fluid pump (23); the input end of the working fluid pump (23) is connected to the cooling tower (13); the cooling tower (13) is connected to the input end of the expander (12); and the output end of the expander (12) is connected to the third water-cooled heat exchanger (20).

5. A wind power direct-driven multi-energy complementary Carnot battery system according to claim 4, characterized in that: The water storage and heat exchange module comprises a first water storage tank (16), a second water storage tank (18), a first switch valve (17), a second switch valve (14), a third water pump (19) and a fourth water pump (15); the first water storage tank (16) is connected to the second water-cooled heat exchanger (1); the first water storage tank (16) is connected to the first switch valve (17); the first switch valve (17) is connected to the third water pump (19); the third water pump (19) is connected to the third water-cooled heat exchanger (20); the fourth water pump (15) is connected to the second water-cooled heat exchanger (1); the fourth water pump (15) is connected to the second switch valve (14); the second switch valve (14) is connected to the second water storage tank (18); and the second water storage tank (18) is connected to the third water-cooled heat exchanger (20).

6. A wind-driven multi-energy complementary Carnot battery system according to claim 5, characterized in that: The water temperature in the second water storage tank (18) is set to 90°C to 150°C; the water temperature in the first water storage tank (16) is set to 80°C to 145°C.

7. A wind power direct-driven multi-energy complementary Carnot battery system according to claim 6, characterized in that: The second water-cooled heat exchanger (1) comprises a condenser, and the condensation temperature of the condenser is set to 100° C. to 155° C.

8. The wind-driven multi-energy complementary Carnot battery system according to claim 4 is characterized in that: The types of working fluids used include R744, R32, R134a, R290, R1233zd, and R1234yf; the types of the first expansion valve (4) and the second expansion valve (8) include electronic expansion valves and thermal expansion valves; the compressor (2) includes a scroll compressor (2), a screw compressor (2), a rotor compressor (2), and a magnetic levitation compressor (2); the expander (12) includes a scroll expander (12), a screw expander (12), and a rotor expander (12); and the solar collector (11) includes a trough solar collector (11), a flat-plate solar collector (11), and a vacuum tube solar collector (11).

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