Solar all-weather power generation and heat pump system based on solution and power generation method

Abstract

According to the solar all-weather power generation and heat pump system based on the solution and the power generation method, when sunlight exists, the photovoltaic heat collection plate supplies power to a power grid or a user through the inverter, and power generation is achieved. According to the solar all-weather power generation and heat pump system based on the saline solution, power generation under all-weather conditions is achieved at the same time. At night or when the illumination condition is insufficient, a concentrated solution in the concentrated solution tank flows into the reverse electrodialysis module and then flows into the dilute solution tank, direct current is generated in the reverse electrodialysis module and is introduced into a power grid or a user through the inverter, and power generation is achieved. Compared with sensible heat storage of hot water, the energy battery based on the concentration difference of the saline solution has higher energy storage density and extremely low heat loss, and compared with a traditional lithium battery and other batteries, the energy battery based on the concentration difference of the saline solution has nearly infinite cycle life, and the operation and maintenance cost can be further reduced. And on the other hand, heat of the air source side can be absorbed through the absorption effect of the solution, and high heating efficiency is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of solar thermal utilization, and in particular to an all-weather solar power generation and heat pump system and a power generation method. Background Art

[0002] Distributed green photovoltaics effectively alleviate overreliance on traditional fossil energy, offering the advantages of clean, pollution-free operation and vast resource availability. Traditional photovoltaic modules only output direct current (DC) green electricity, with a photoelectric conversion efficiency of approximately 20%. Nearly 80% of solar energy is reflected or dissipated as heat, rather than converted into useful energy. Solar photovoltaic / thermal (PV / T) technology combines solar photovoltaic power generation with thermal collection technology. Compared to traditional photovoltaics, it recovers heat from photovoltaic panels, improving both heat dissipation and power generation efficiency. This significantly increases the overall utilization efficiency of solar energy and reduces overall costs. Increasing water tank / PV capacity can also achieve a certain degree of all-weather heat supply within buildings.

[0003] However, this type of heat storage, using sensible heat from hot water, results in significant heat loss, low energy storage density, and a low heating efficiency of less than 100%. In practical applications, air-source compression heat pumps are often deployed to supplement indoor heating. For off-grid applications, batteries are required to store photovoltaic power generation. However, the high initial investment and limited cycle life of batteries increase the overall cost of the system. Summary of the Invention

[0004] 1. Technical problems to be solved: How to achieve efficient all-weather power generation and heating under solar thermal utilization conditions.

[0005] 2. Technical solution: In order to solve the above problems, the present invention provides a solution-based all-weather solar power generation and heat pump system, including a photovoltaic collector panel, which is supplied to the power grid or users through an inverter to achieve power generation. The concentrated solution tank is connected in sequence through a first stop valve, a reverse electrodialysis module, a second stop valve and a dilute solution tank. The dilute solution tank and the concentrated solution tank are both provided with a heat exchanger. The circulating water exchanges heat through the heat exchanger without contacting the solution. The reverse electrodialysis module is connected to the inverter. The dilute solution tank, the solution pump, the first ball valve, the photovoltaic collector panel, and the concentrated solution tank are connected in sequence. During the day, the circulating water in the concentrated solution tank that has been heat exchanged through the heat exchanger enters the user's home for indoor heating and then returns to the heat exchanger of the concentrated solution tank through the circulating water pump; at night or when the light conditions are insufficient, the circulating water after indoor heating heat exchange passes through the heat exchanger of the dilute solution tank and then directly enters the indoor heating heat exchange through the fourth three-way regulating valve and the sixth three-way regulating valve.

[0006] Furthermore, it also includes a condenser, the outlet of the condenser is connected to the inlet of the water tank. During the day, the dilute solution will be desorbed into water vapor and concentrated solution after being heated by photovoltaic power, wherein the concentrated solution is stored in the concentrated solution tank, and the water vapor will flow into the water tank for storage after releasing heat through the condenser. The circulating water after indoor heating and heat exchange passes through the circulating water pump, part of which enters the heat exchanger of the concentrated solution tank through the third three-way regulating valve for heat exchange and then enters the indoor heating and heat exchange, and part of which passes through the fourth three-way regulating valve directly into the condenser for heat exchange and then enters the indoor heating and heat exchange.

[0007] Furthermore, it also includes a water supply tank, which supplies water to the dilute solution tank through the third ball valve and supplies water to the water tank through the fourth ball valve.

[0008] Furthermore, the water in the water tank is connected through a throttling pipe, an evaporator, the evaporator, and a second ball valve to enter the dilute solution tank.

[0009] Furthermore, it also includes a first three-way regulating valve, a second three-way regulating valve, a third three-way regulating valve, a fourth three-way regulating valve, and a sixth three-way regulating valve that form a circulation through the pipeline, wherein the first three-way regulating valve is arranged at a liquid outlet of the dilute solution tank, the second three-way regulating valve is arranged at a liquid inlet of the dilute solution tank, the third three-way regulating valve is arranged at a liquid inlet of the concentrated solution tank, the fourth three-way regulating valve is arranged at the condenser, the fifth three-way regulating valve is arranged at the outlet of the condenser, the sixth three-way regulating valve is arranged at the inlet of indoor heating, and the fifth three-way regulating valve is connected.

[0010] Furthermore, a filter is provided on the pipeline between the indoor heating outlet and the dilute solution tank.

[0011] Furthermore, the solution is a mixture of inorganic salt and water.

[0012] The present invention also provides a solution-based all-weather solar power generation method, using the solution-based all-weather solar power generation and heat pump system, during the day, the dilute solution with a low salt component in the dilute solution tank is first pumped into the photovoltaic collector panel through a solution pump after the pressure is increased by a first ball valve, so as to recover the waste heat of the photovoltaic collector panel, and the electricity generated by the photovoltaic panel is converted into alternating current through an inverter and transmitted to the power grid or users to realize power generation; the solution heated by the photovoltaic waste heat flows into the concentrated solution tank, and in the concentrated solution tank, it exchanges heat with part of the heating circulating water diverted by the third three-way regulating valve through an internal heat exchanger to recover the heat of the solution; the dilute solution is desorbed into water vapor and concentrated solution after being heated by photovoltaic, and the concentrated solution is stored in the concentrated solution tank , and the water vapor releases heat through the condenser and flows into the water tank for storage. The heat of the condenser is also recovered through part of the heating circulating water diverted by the fourth three-way regulating valve; after the heating process of this photovoltaic collector, the dilute solution in the dilute solution tank is continuously converted into a concentrated solution in the concentrated solution tank and water in the water tank, realizing the storage of energy during the day; the heated circulating water is gathered through the fifth three-way regulating valve, and the flow direction is adjusted by the sixth three-way regulating valve, and finally enters the room for heating; the circulating water is cooled by heat exchange in the room and filtered through the filter, and the circulating heating water circuit is realized throughout the day through the circulating water pump and the first three-way regulating valve and the second three-way regulating valve. When the water amount in the circulating heating water circuit is insufficient, it is replenished through the water replenishing tank.

[0013] At night or when the lighting conditions are insufficient, the concentrated solution in the concentrated solution tank flows into the reverse electrodialysis module through the second stop valve, and finally flows into the dilute solution tank through the first stop valve. Due to the concentration difference of the solution, direct current is generated in the reverse electrodialysis module, and is passed into the power grid or the user through the inverter to realize power generation; the water stored in the water tank is throttled by the throttling tube, passed into the evaporator, exchanged heat with the outside world, absorbed heat from the external environment, heated up to become water vapor, and finally flowed into the dilute solution tank through the first ball valve, and merged with the concentrated solution from the concentrated solution tank. At this time, the concentrated solution absorbs water vapor and becomes a dilute solution. The solution heat at this time is exchanged with the circulating heating water regulated by the first three-way regulating valve and the second three-way regulating valve through the built-in heat exchanger in the dilute solution tank; the heated circulating water is transported by the circulating water pump, and directly flows into the indoor heating through the third three-way regulating valve, the fourth three-way regulating valve, and the sixth three-way regulating valve. The cooled circulating water passes through the filter to form the entire circulating heating water loop; when the amount of water in the circulating heating water loop or the water tank is insufficient, it is replenished through the water replenishment tank.

[0014] 3.Beneficial effects: The present invention provides a solar all-weather power generation and heat pump system and power generation method based on a saline solution, achieving simultaneous power generation and heating under all-weather conditions. This system, based on an energy cell with a concentration difference in a saline solution, has a higher energy storage density than hot water sensible heat storage, exhibits minimal heat loss, and has a nearly unlimited cycle life compared to traditional lithium batteries, further reducing operating and maintenance costs. Furthermore, the solution's absorption effect absorbs heat from the air source, resulting in high heating efficiency. Therefore, the system can deeply tap into solar thermal energy and significantly improve overall operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the workflow of the present invention during the day.

[0016] Figure 2 It is a schematic diagram of the workflow of the present invention at night.

[0017] Explanation of the accompanying symbols: 1. First three-way regulating valve; 2. Second three-way regulating valve; 3. Circulating water pump; 4. First ball valve; 5. Solution pump; 6. Dilute solution tank; 7. Photovoltaic collector panel; 8. Inverter; 9. First stop valve; 10. Reverse electrodialysis module; 11. Second stop valve; 12. Second ball valve; 13. Third three-way regulating valve; 14. Fourth three-way regulating valve; 15. Concentrated solution tank; 16. Condenser; 17. Fifth three-way regulating valve; 18. Sixth three-way regulating valve; 19. Water supply tank; 20. Third ball valve; 21. Fourth ball valve; 22. Evaporator; 23. Water tank; 24. Throttle tube; 25. Filter. DETAILED DESCRIPTION

[0018] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0019] The present invention provides a solution-based all-weather solar power generation and heat pump system, comprising a photovoltaic heat collecting panel 7. During the day when there is sufficient sunlight, the photovoltaic heat collecting panel 7 generates electricity for the power grid or users through an inverter 8.

[0020] The concentrated solution tank 15 is connected to the dilute solution tank 6 in sequence through the first stop valve 9 , the reverse electrodialysis module 10 , the second stop valve 11 , and the reverse electrodialysis module 10 is connected to the inverter 8 .

[0021] The dilute solution tank 6, solution pump 5, first ball valve 4, photovoltaic collector panel 7, and concentrated solution tank 15 are connected in sequence. During the day or when there is sufficient sunlight, the dilute solution with a low salt content in the dilute solution tank 6 is first pumped into the photovoltaic collector panel 7 through the solution pump 5 and the first ball valve 4 to increase the pressure, thereby recovering the waste heat of the photovoltaic collector panel 7, thereby improving the power generation efficiency of the photovoltaic panel. The solution heated by the photovoltaic waste heat flows into the concentrated solution tank 15. After being heated by the photovoltaic system, the dilute solution will be desorbed into water vapor. The water vapor evaporates, the water content in the solution decreases, and the concentration increases, which is called a concentrated solution. The concentrated solution is stored in the concentrated solution tank 15. This process mainly stores the concentrated solution in the concentrated solution tank 15, so that the solution concentration in the concentrated solution tank 15 has a solubility difference with the solution concentration in the dilute solution tank 6, in preparation for power generation at night or when the light conditions are insufficient.

[0022] The present invention utilizes the salt water solution to recover the heat of the photovoltaic panel, thereby enhancing the heat dissipation of the photovoltaic panel and improving the power generation efficiency of the photovoltaic panel.

[0023] In the present invention, the dilute concentrated solution and the concentrated solution are relative. The solution concentration in the concentrated solution tank 15 is higher than that in the dilute solution tank 6, and is called a concentrated solution. The solution solubility in the dilute solution tank 6 is lower than that in the concentrated solution tank 15, and is called a dilute solution.

[0024] At night or when the lighting conditions are insufficient, the concentrated solution in the concentrated solution tank 15 flows into the reverse electrodialysis module 10 through the second stop valve 11, and finally flows into the dilute solution tank 6 through the first stop valve 9. Due to the concentration difference of the solution, direct current is generated in the reverse electrodialysis module 10 and is passed to the power grid or users through the inverter 8 to achieve power generation.

[0025] The present invention uses a solution to convert photovoltaic waste heat into a concentration difference in brine, achieving highly intensive heat storage and deep exploitation of solar energy. The concentration difference can be converted into electricity through reverse electrodialysis, enabling power generation in dark conditions such as at night.

[0026] Both the dilute solution tank 6 and the concentrated solution tank 15 are equipped with heat exchangers, through which the circulating water exchanges heat without coming into contact with the solution. During the day, the circulating water in the concentrated solution tank 15, after undergoing heat exchange in the heat exchanger, enters the user's home for indoor heating. It then returns to the heat exchanger in the concentrated solution tank 15 via the circulating water pump 3, forming a daytime heating water circuit. At night or when light conditions are insufficient, the circulating water, after undergoing heat exchange in the dilute solution tank 6, passes through the fourth three-way regulating valve 14 and the sixth three-way regulating valve 18 and directly enters the home for indoor heating, forming a nighttime heating water circuit.

[0027] In one embodiment, a condenser 16 is further included, and an outlet of the condenser 16 is connected to an inlet of the water tank 23 .

[0028] During the day, the dilute solution is heated by photovoltaics and desorbed into water vapor and concentrated solution. The concentrated solution is stored in concentrated solution tank 15, while the water vapor releases heat through condenser 16 and flows into water tank 23 for storage. The configuration of condenser 16 and water tank 23 allows the evaporated water vapor to be converted into water and stored.

[0029] The circulating heating water circuit during the day is adjusted accordingly: the circulating water after indoor heating heat exchange passes through the circulating water pump 3, part of which enters the heat exchanger of the concentrated solution tank 15 through the third three-way regulating valve 13 for heat exchange and then enters the indoor heating heat exchange; the other part passes through the fourth three-way regulating valve 14 to the condenser 16 for heat exchange and then enters the indoor heating heat exchange.

[0030] In one embodiment, the water in the water tank 23 is connected through the throttling tube 24 and the evaporator 22, and then enters the dilute solution tank 6 through the evaporator 22 and the second ball valve 12, so that the solution in the dilute solution tank 6 is maintained at a certain amount, ensuring that the concentration of the solution in the dilute solution tank 6 is always lower than the concentration of the solution in the concentrated solution tank 15.

[0031] In one embodiment, a water replenishing tank 19 is further included. When the water in the water tank 23 is insufficient, water is replenished to the water tank 23 through the fourth ball valve 21. Water can also be directly replenished to the dilute solution tank 6 through the third ball valve 20.

[0032] In one embodiment, the system further includes a first three-way regulating valve 1, a second three-way regulating valve 2, a third three-way regulating valve 13, a fourth three-way regulating valve 14, and a sixth three-way regulating valve 18 that form a circulation through the pipeline, wherein the first three-way regulating valve 1 is arranged at the heat exchanger outlet of the dilute solution tank 6, and the second three-way regulating valve 2 is arranged at the heat exchanger inlet of the dilute solution tank 6. Through the adjustment of the first three-way regulating valve 1 and the second three-way regulating valve 2, the circulating water does not enter the dilute solution tank 6 during the day, and the circulating water enters the dilute solution tank 6 for heat exchange at night or when the light conditions are insufficient.

[0033] The third three-way regulating valve 13 is arranged at the inlet of the heat exchanger of the concentrated solution tank 15 , so as to allow a portion of the circulating water to enter the heat exchanger of the concentrated solution tank 15 for heat exchange.

[0034] The fourth three-way regulating valve 14 is located at the inlet of the condenser 16. During the day, a portion of the circulating water passes through the condenser 16. The fifth three-way regulating valve 17 is located at the outlet of the condenser 16. The sixth three-way regulating valve 18 is located at the inlet of the indoor heating system and is connected to the fifth three-way regulating valve 18. After passing through the condenser 16, the circulating water enters the indoor heating system through the fifth and sixth three-way regulating valves 17 and 18 for heat exchange.

[0035] In one embodiment, a filter 25 is provided on the pipeline between the outlet of the indoor heating system and the dilute solution tank 6 to filter out some impurities in the circulating water.

[0036] The solution of the present invention is a mixture of inorganic salts and water. The solution can absorb heat from the surrounding air through its absorption effect, achieving efficient heating and improving overall operating efficiency.

[0037] The present invention also provides a solution-based all-weather solar power generation method, using the solution-based all-weather solar power generation and heat pump system, such as Figure 1 As shown, during the day, the dilute solution with a low salt content in the dilute solution tank 6 is first pumped to the photovoltaic collector panel 7 through the solution pump 5 after the pressure is increased by the first ball valve 4, so as to recover the waste heat of the photovoltaic collector panel 7. The electricity generated by the photovoltaic panel is converted into AC electricity through the inverter 8 and transmitted to the power grid or users to realize power generation; the solution heated by the photovoltaic waste heat flows into the concentrated solution tank 15, and in the concentrated solution tank 15, it exchanges heat with part of the heating circulating water diverted by the third three-way regulating valve 13 through the internal heat exchanger to recover the heat of the solution; the dilute solution will be desorbed into water vapor and concentrated solution after being heated by photovoltaic power, wherein the concentrated solution is stored in the concentrated solution tank 15, and the water vapor releases heat through the condenser 16 and flows into the water tank 23 for storage, and the condenser The heat of 16 is also recovered through part of the heating circulating water diverted by the fourth three-way regulating valve 14; after the heating process of this photovoltaic collector 7, the dilute solution in the dilute solution tank 6 is continuously converted into the concentrated solution in the concentrated solution tank 15 and the water in the water tank 23, so as to realize the storage of energy during the day; the heated circulating water is gathered through the fifth three-way regulating valve 17, and the flow direction is adjusted by the sixth three-way regulating valve 18, and finally enters the room for heating; the circulating water is cooled by heat exchange in the room and filtered through the filter 25, and the circulating heating water circuit is realized throughout the day through the circulating water pump 3 and the first three-way regulating valve 1 and the second three-way regulating valve 2. When the water amount in the circulating heating water circuit is insufficient, it is supplemented by the water replenishing tank 19.

[0038] At night or when light conditions are insufficient, such as Figure 2As shown, the concentrated solution in the concentrated solution tank 15 flows into the reverse electrodialysis module 10 through the second stop valve 11, and is finally merged into the dilute solution tank 6 through the first stop valve 9. Due to the concentration difference of the solution, direct current is generated in the reverse electrodialysis module 10, and is passed into the power grid or the user through the inverter 8 to realize power generation; the water stored in the water tank 23 is throttled by the throttling tube 24, passed into the evaporator 22, exchanges heat with the outside world, absorbs heat from the external environment, heats up to become water vapor, and finally merges into the dilute solution tank 6 through the first ball valve 12, and merges with the concentrated solution from the concentrated solution tank 15. At this time, the concentrated solution absorbs water vapor and becomes a dilute solution. The solution heat at this time is exchanged with the circulating heating water regulated by the first three-way regulating valve 1 and the second three-way regulating valve 2 through the built-in heat exchanger in the dilute solution tank 6; the heated circulating water is transported by the circulating water pump 3, and is directly merged into the indoor heating through the third three-way regulating valve 13, the fourth three-way regulating valve 14, and the sixth three-way regulating valve 18. The circulating water after cooling down passes through the filter 25 to form the entire circulating heating water loop; when the water amount in the circulating heating water loop or the water amount in the water tank is insufficient, it is replenished through the water replenishment tank 19.

[0039] The present invention utilizes the heat of the photovoltaic panel to drive the solution to heat during the day, and recovers the solution heat generated when the solution combines with water at night, thereby achieving all-weather heating.

[0040] Although the present invention has been disclosed above in terms of preferred embodiments, they are not intended to limit the present invention. Anyone skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined by the claims of this application.

Claims

1. A solution-based solar all-weather power generation and heat pump system, comprising a photovoltaic heat collecting panel (7), wherein the photovoltaic heat collecting panel (7) is supplied to a power grid or a user via an inverter (8) to realize power generation, characterized in that: The concentrated solution tank (15) is connected in sequence through the first stop valve (9), the reverse electrodialysis module (10), the second stop valve (11) and the dilute solution tank (6). The dilute solution tank (6) and the concentrated solution tank (15) are both provided with a heat exchanger. The circulating water exchanges heat through the heat exchanger and does not contact the solution. The reverse electrodialysis module (10) is connected to the inverter (8). The dilute solution tank (6), the solution pump (5), the first ball valve (4), the photovoltaic collector plate (7) and the concentrated solution tank (15) are connected in sequence. During the day, the circulating water in the concentrated solution tank (15) that has undergone heat exchange through the heat exchanger enters the user's home for indoor heating and then returns to the heat exchanger of the concentrated solution tank (15) through the circulating water pump (3); at night or when the light conditions are insufficient, the circulating water after indoor heating heat exchange passes through the heat exchanger of the dilute solution tank (6) and then directly enters the indoor heating heat exchange through the fourth three-way regulating valve (14) and the sixth three-way regulating valve (18).

2. The solution-based all-weather solar power generation and heat pump system according to claim 1, characterized in that: The system further comprises a condenser (16), wherein the outlet of the condenser (16) is connected to the inlet of the water tank (23). During the day, the dilute solution is desorbed into water vapor and concentrated solution after being heated by photovoltaic means, wherein the concentrated solution is stored in the concentrated solution tank (15), and the water vapor is released through the condenser (16) and flows into the water tank (23) for storage. After the indoor heating heat exchange, a portion of the circulating water passes through the circulating water pump (3) and enters the heat exchanger of the concentrated solution tank (15) through the third three-way regulating valve (13) for heat exchange and then enters the indoor heating heat exchange, and a portion of the circulating water passes through the fourth three-way regulating valve (14) and directly enters the condenser (16) for heat exchange and then enters the indoor heating heat exchange.

3. The solution-based all-weather solar power generation and heat pump system according to claim 2, characterized in that: It also includes a water supply tank (19), which enters the dilute solution tank (6) through the third ball valve (20) to mix the solution, and supplies water to the water tank (23) through the fourth ball valve (21).

4. The solution-based all-weather solar power generation and heat pump system according to claim 3, characterized in that: The water in the water tank (23) passes through the throttling tube (24), the evaporator (22), and the second ball valve (12) and enters the dilute solution tank (6) to be mixed with the solution.

5. The solution-based all-weather solar power generation and heat pump system according to claim 4, characterized in that: The invention also includes a first three-way regulating valve (1), a second three-way regulating valve (2), a third three-way regulating valve (13), a fourth three-way regulating valve (14), and a sixth three-way regulating valve (18) which form a circulation through the pipeline, wherein the first three-way regulating valve (1) is arranged at the outlet of the heat exchanger of the dilute solution tank (6), the second three-way regulating valve (2) is arranged at the inlet of the heat exchanger of the dilute solution tank (6), the third three-way regulating valve (13) is arranged at the inlet of the heat exchanger of the concentrated solution tank (15), the fourth three-way regulating valve (14) is arranged at the inlet of the condenser (16), the fifth three-way regulating valve (17) is arranged at the outlet of the condenser (16), and the sixth three-way regulating valve (18) is arranged at the inlet of the indoor heating and connected to the fifth three-way regulating valve (18).

6. The solution-based all-weather solar power generation and heat pump system according to any one of claims 1 to 5, characterized in that: A filter (25) is provided on the pipeline between the indoor heating outlet and the dilute solution tank (6).

7. The solution-based all-weather solar power generation and heat pump system according to any one of claims 1 to 5, characterized in that: The solution is a mixture of inorganic salts and water.

8. A solution-based all-weather solar power generation method, using the solution-based all-weather solar power generation and heat pump system according to any one of claims 1 to 7, characterized in that: During the day, the dilute solution with a low salt content in the dilute solution tank (6) is first pumped into the photovoltaic collector (7) through the solution pump (5) after the pressure is increased through the first ball valve (4), and the waste heat of the photovoltaic collector (7) is recovered. The electricity generated by the photovoltaic panel is converted into AC electricity through the inverter (8) and transmitted to the power grid or users to achieve power generation; the solution heated by the photovoltaic waste heat flows into the concentrated solution tank (15), and in the concentrated solution tank (15), it exchanges heat with part of the heating circulating water diverted through the third three-way regulating valve (13) through the internal heat exchanger to recover the heat of the solution; after being heated by the photovoltaic, the dilute solution will desorb into water vapor and concentrated solution, of which the concentrated solution is stored in the concentrated solution tank (15), and the water vapor releases heat through the condenser (16) and flows into the water tank (23) for storage. The heat of the condenser (16) is also transferred through the third three-way regulating valve (13). Part of the heating circulating water diverted by the four three-way regulating valves (14) is recycled; after the heating process of the photovoltaic collector plate (7), the dilute solution in the dilute solution tank (6) is continuously converted into the concentrated solution in the concentrated solution tank (15) and the water in the water tank (23), thereby realizing the storage of energy during the day; the heated circulating water is gathered through the fifth three-way regulating valve (17), and the flow direction is adjusted by the sixth three-way regulating valve (18), and finally enters the room for heating; the circulating water is cooled by indoor heat exchange and filtered by the filter (25), and then passes through the circulating water pump (3) through the first three-way regulating valve (1) and the second three-way regulating valve (2) and returns to the heat exchanger of the concentrated solution tank (15) to enter the room for heating, realizing the water circulation throughout the day. When the water volume in the circulating heating water circuit is insufficient, it is replenished through the water supply tank (19).

9. A solution-based all-weather solar power generation method, using the solution-based all-weather solar power generation and heat pump system according to any one of claims 1 to 8, characterized in that: At night or when the light conditions are insufficient, the concentrated solution in the concentrated solution tank (15) flows into the reverse electrodialysis module (10) through the second stop valve (11), and finally flows into the dilute solution tank (6) through the first stop valve (9). Due to the concentration difference of the solution, direct current is generated in the reverse electrodialysis module (10), and is passed into the power grid or the user through the inverter (8) to realize power generation; the water stored in the water tank (23) is throttled through the throttling pipe (24) and passed into the evaporator (22), exchanges heat with the outside world, absorbs the heat of the external environment, heats up and turns into water vapor, and finally flows into the dilute solution tank (6) through the first ball valve (12), and is mixed with the water from the concentrated solution. The concentrated solutions in the liquid tank (15) are combined. At this time, the concentrated solutions absorb water vapor and become dilute solutions. The heat of the solution at this time is exchanged with the circulating heating water regulated by the first three-way regulating valve (1) and the second three-way regulating valve (2) through the built-in heat exchanger in the dilute solution tank (6); the heated circulating water is transported by the circulating water pump (3) and directly merged into the indoor heating through the third three-way regulating valve (13), the fourth three-way regulating valve (14), and the sixth three-way regulating valve (18). The circulating water that comes out after cooling passes through the filter (25) to form the entire water circulation loop; when the amount of water in the circulating heating water loop or the amount of water in the water tank is insufficient, it is supplemented through the water supply tank (19).

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