A photoelectric nuclear storage multi-energy complementary combined cooling and heating system and its operation method

Abstract

This invention discloses a multi-energy complementary combined cooling and heating system based on solar, nuclear, and energy storage, and its operation method. The system includes a pool-type low-temperature heating reactor, a gas-fired boiler, solar collectors, a hot water storage tank, a cross-seasonal buried pipe thermal storage device, a single-effect absorption chiller / thermal chiller, a solution dehumidifier, and a water-to-water heat exchanger. During the winter heating season, the water supplied by the pool-type low-temperature heating reactor drives the absorption heat pump, which can raise the low-grade heat in the cross-seasonal buried pipe thermal storage device to a medium grade that meets the heating needs of users. This not only realizes the cross-seasonal utilization of solar energy but also significantly improves the system's heating capacity. Furthermore, the hot water storage tank configured on the user side can simultaneously store the heat output from the pool-type low-temperature heating reactor and the heat collected by the solar collectors; it achieves peak shaving for heating and cooling in winter and summer respectively, improving the system's operational flexibility, reducing the system's designed installed capacity, and lowering the initial investment.

Description

Technical Field

[0001] This invention relates to the field of integrated utilization technology of photovoltaic, nuclear, and energy storage multi-energy complementary systems, and particularly to a photovoltaic, nuclear, and energy storage multi-energy complementary combined cooling and heating system and its operation method. Background Technology

[0002] Solar energy, as a typical renewable energy source, boasts significant advantages such as wide distribution, convenient access, and clean, pollution-free operation, and its thermal utilization technology is already highly mature. However, solar energy is characterized by intermittent and seasonal variations. To improve solar energy utilization efficiency, cross-seasonal buried pipe thermal storage devices can be used to store solar energy from non-heating and non-cooling seasons in the soil surrounding the buried pipes, thereby meeting winter heating needs. However, the soil thermal storage temperature should not be too high, because the higher the soil thermal storage temperature, the greater the temperature difference between the soil and the surrounding environment, and the greater the heat loss of the soil thermal storage body. Typically, the soil thermal storage temperature is below 50℃, while the supply water temperature of the user-side secondary heating network is usually around 60℃, meaning the heat stored in the soil cannot be directly used for user heating.

[0003] The water supply temperature of the pool-type low-temperature heating stack can reach 90℃, which can be used to drive absorption heat pumps to upgrade the low-grade heat in the cross-season buried pipe heat storage device to a higher grade, greatly improving the system's heating capacity and thus meeting the heating needs of users.

[0004] To ensure safe and stable operation, the core output power of the low-temperature heating reactor should not be frequently adjusted. During winter heating and summer cooling, in order to solve the problem of the inability to match the heating reactor with the heating and cooling loads in real time, hot water storage tanks need to be configured for heat storage and peak shaving. In addition, the heat collected by the solar collector can also be stored in hot water storage tanks for heating and cooling peak shaving, further reducing the system's installed capacity.

[0005] Therefore, a pool-type low-temperature heating reactor, a solar thermal collector, and a cross-seasonal buried pipe thermal storage device can be integrated into a clean and efficient solar-nuclear-storage multi-energy complementary system to realize the cross-seasonal utilization of solar energy and fully improve the system's heating and cooling capacity. Summary of the Invention

[0006] To address the shortcomings of low solar energy utilization rates in winter, the inability to directly utilize low-grade soil thermal storage, insufficient heating capacity of low-temperature heating reactors, and lack of flexible adjustment, this invention provides a solar-nuclear-storage multi-energy complementary combined cooling and heating system and its operation method. The system is equipped at the user's energy station with solar collectors, a cross-seasonal buried pipe thermal storage device, a hot water storage tank, an absorption chiller, a water-to-water heat exchanger, and a solution dehumidifier. This enables cross-seasonal storage and utilization of solar energy, improves system operational flexibility, increases the system's heating and cooling capacity, reduces the system's installed capacity, and improves the system's economic efficiency. Furthermore, the independent temperature and humidity control cooling method used in summer not only increases the temperature difference between the primary heating network's supply and return water but also improves the coefficient of performance (COP) of the absorption chiller during the cooling season.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A multi-energy complementary cogeneration system combining solar, nuclear, and energy storage includes a reactor side consisting of a pool-type cryogenic heating reactor 1, a first circulating water pump 2, a first heat exchanger 3, a second circulating water pump 4, a second heat exchanger 5, a third circulating water pump 6, and a first valve 7. The reactor side is equipped with a second valve 8, a fourth circulating water pump 9, a third valve 10, a fifth circulating water pump 11, a fourth valve 12, a fifth valve 13, a hot water storage tank 14, a sixth valve 15, a solar collector 16, a sixth circulating water pump 17, a seventh valve 18, an eighth valve 19, a ninth valve 20, a tenth valve 21, an eleventh valve 22, a twelfth valve 23, a thirteenth valve 24, a third heat exchanger 25, a fourteenth valve 26, a seventh circulating water pump 27, and a cross-flow... The user energy station side consists of the following components: seasonal buried pipe thermal storage device 28, cooling tower 29, fifteenth valve 30, eighth circulating water pump 31, sixteenth valve 32, seventeenth valve 33, eighteenth valve 34, ninth circulating water pump 35, heat user 36, nineteenth valve 37, twentieth valve 38, twenty-first valve 39, twenty-second valve 40, solution dehumidifier unit 41, water-to-water heat exchanger 42, single-effect absorption chiller / thermal water heater 43, twenty-third valve 44, tenth circulating water pump 45, twenty-fourth valve 46, cold user 47, twenty-fifth valve 48, eleventh circulating water pump 49, twenty-sixth valve 50, twenty-seventh valve 51, twelfth circulating water pump 52, and twenty-eighth valve 53.

[0009] The specific connection relationship is as follows: the primary loop water supply of the pool-type low-temperature heating reactor 1 is connected to the hot-side inlet of the first circulating water pump 2 and the first heat exchanger 3 in sequence through connecting pipes, transferring heat to the secondary loop; the cold-side outlet of the first heat exchanger 3 is connected to the hot-side inlet of the second circulating water pump 4 and the second heat exchanger 5 in sequence through connecting pipes, transferring heat to the primary heating network; the cold-side outlet of the second heat exchanger 5 is connected to the third circulating water pump 6, the first valve 7, and the ninth valve 20 in sequence through connecting pipes; the outlet of the ninth valve 20 is divided into two paths, the first path being connected to the second valve 8 and the hot water storage tank 14 in sequence through connecting pipes. The hot-side inlet is connected; the second path is connected to the thirteenth valve 24 and the generator inlet of the single-effect absorption chiller 43 via a connecting pipe; the generator outlet of the single-effect absorption chiller 43 is divided into two paths, the first path is connected to the nineteenth valve 37 and the regenerator heat source side inlet of the solution dehumidifier 41 via a connecting pipe; the second path is connected to the twentieth valve 38 and the hot-side inlet of the water-to-water heat exchanger 42 via a connecting pipe; the hot-side outlet of the water-to-water heat exchanger 42 and the regenerator heat source side outlet of the solution dehumidifier 41 are both connected to the twelfth valve 23 of the primary heating network return water main;

[0010] The outlet of the twelfth valve 23 is divided into two paths. The first path is connected to the fifth valve 13 and the cold side inlet of the hot water storage tank 14 via a connecting pipe. The second path is connected to the eighth valve 19 via a connecting pipe. The eighth valve 19 is connected to the cold side inlet of the second heat exchanger 5. The hot water storage tank 14 has two outlets on the cold side. The first cold side outlet is connected to the eighth valve 19 via the fifth circulating water pump 11 and the fourth valve 12. The second cold side outlet is connected to the inlet of the solar collector 16 via the sixth circulating water pump 17 and the seventh valve 18. The outlet of the solar collector 16 is connected to the hot side inlet of the hot water storage tank 14 via the sixth valve 15.

[0011] The hot water storage tank 14's hot-side outlet is sequentially connected to the fourth circulating water pump 9 and the third valve 10. The outlet of the third valve 10 is divided into two paths: the first path is connected sequentially to the common node between the tenth valve 21 and the twenty-seventh valve 51 via a connecting pipe; the second path is connected sequentially to the thirteenth valve 24 and the generator inlet of the single-effect absorption chiller 43 via a connecting pipe. The evaporator outlet of the single-effect absorption chiller 43 is divided into two paths: the first path is connected sequentially to the twelfth circulating water pump 52, the twenty-seventh valve 51, the tenth valve 21, and the... The common node between valves 27 and 51 is connected; the second path is connected to the chilled water supply main through valve 26 and 50; the common node between valve 10 and valve 51 is connected to the heat transfer medium side inlet of the third heat exchanger 25 through a connecting pipe; the heat transfer medium side outlet of the third heat exchanger 25 is divided into two paths, the first path is connected to valve 11, valve 13, and the cold side inlet of hot water storage tank 14 in sequence through a connecting pipe; the second path is connected to valve 28, valve 53, and the evaporator inlet of single-effect absorption chiller 43 in sequence through a connecting pipe.

[0012] The outlet of the cross-seasonal buried pipe heat storage device 28 is connected in sequence to the seventh circulating water pump 27, the fourteenth valve 26, and the inlet of the buried pipe circulating water side of the third heat exchanger 25; the outlet of the buried pipe circulating water side of the third heat exchanger 25 is connected to the inlet of the cross-seasonal buried pipe heat storage device 28.

[0013] The return water outlet of the secondary heating network for heat user 36 is sequentially connected to the common node between the ninth circulating water pump 35, the eighteenth valve 34, and the sixteenth valve 32 and the eighteenth valve 34; the cooling water supply outlet of cooling tower 29 is sequentially connected to the common node between the eighth circulating water pump 31, the sixteenth valve 32, and the sixteenth valve 32 and the eighteenth valve 34; the outlet of the common node between the sixteenth valve 32 and the eighteenth valve 34 is split into two paths and connected to the twenty-first valve 39 and the twenty-second valve 40 respectively; the outlet of the twenty-first valve 39 is connected to the common node via a connecting pipe. The cold side of the water-to-water heat exchanger 42 is connected to the common node between the fifteenth valve 30 and the seventeenth valve 33; the outlet of the twenty-second valve 40 is connected to the absorber and condenser of the single-effect absorption chiller 43, and the common node between the fifteenth valve 30 and the seventeenth valve 33 via a connecting pipe; the outlet of the common node between the fifteenth valve 30 and the seventeenth valve 33 is divided into two paths, the first path is connected to the seventeenth valve 33 and the heat user 36 via a connecting pipe; the second path is connected to the fifteenth valve 30 and the cooling tower 29 via a connecting pipe.

[0014] The dilute solution return outlet of the fresh air handling unit of chilled user 47 is connected to the tenth circulating water pump 45, the twenty-third valve 44, and the regenerator solution side inlet of the solution dehumidifier unit 41 via a connecting pipe. The regenerator solution side outlet of the solution dehumidifier unit 41 is connected to the concentrated solution supply main pipe via the twenty-fourth valve 46 via a connecting pipe. The chilled water return outlet of chilled user 47 is connected to the eleventh circulating water pump 49, the twenty-fifth valve 48, and the evaporator inlet of the single-effect absorption chiller / thermal water heater 43 via a connecting pipe.

[0015] The working fluid of the single-effect absorption chiller / thermal water heater 43 is a lithium bromide solution; the working fluid of the solution dehumidifier 41 is a lithium chloride solution; the regenerator of the solution dehumidifier 41 is driven by primary heating network hot water after being cooled by the generator of the single-effect absorption chiller / thermal water heater 43.

[0016] Throughout the year, the solar collector 16 operated at full capacity without any curtailment of solar power.

[0017] The operation method of the photovoltaic-nuclear-storage multi-energy complementary combined cooling and heating system includes a heating reactor-side operation method and a user energy station-side operation method.

[0018] The operation method of the heating reactor side is as follows: During the summer cooling and winter heating periods, the primary loop water supply from the core outlet of the pool-type low-temperature heating reactor 1 enters the hot side of the first heat exchanger 3 through the first circulating water pump 2, transferring heat from the primary loop to the secondary loop. After absorbing heat on the cold side of the first heat exchanger 3, the secondary loop water supply enters the hot side of the second heat exchanger 5 through the second circulating water pump 4, transferring heat to the primary heating network water supply on the cold side of the second heat exchanger 5. According to the cooling or heating load demand of the user's energy station, the position of the reactor regulating rods is changed to adjust the core output power.

[0019] The user energy station side operation method includes the cross-seasonal thermal storage mode operation method during the non-cooling season and non-heating season, the summer cooling mode operation method, and the winter heating mode operation method.

[0020] (I) Operation methods of cross-seasonal heat storage mode during non-cooling season and non-heating season

[0021] During the daytime of the non-cooling and non-heating seasons, cold water in the hot water storage tank 14 enters the solar collector 16 through the sixth circulating water pump 17 and the seventh valve 18 to absorb heat and increase its temperature. The heated water is then stored in the hot water storage tank 14 through the sixth valve 15. At the same time, the hot water in the hot water storage tank 14 enters the third heat exchanger 25 through the fourth circulating water pump 9, the third valve 10, and the tenth valve 21 to release heat and decrease its temperature. Then, it returns to the cold water inlet of the hot water storage tank 14 through the eleventh valve 22 and the fifth valve 13. The circulating water supply in the cross-seasonal buried pipe heat storage device 28, after releasing heat and decreasing its temperature, enters the third heat exchanger 25 through the seventh circulating water pump 27 and the fourteenth valve 26 to absorb heat and increase its temperature. Then, it enters the cross-seasonal buried pipe heat storage device 28, storing the heat in the soil around the cross-seasonal buried pipe heat storage device 28. The soil slowly heats up, achieving cross-seasonal heat storage.

[0022] (II) Summer Cooling Mode Operation Method

[0023] The single-effect absorption chiller / thermal water heater 43 switches to cooling mode;

[0024] When the cooling load is low at night, the primary heating network water supply is split into two streams at the outlet of the ninth valve 20. The first stream flows into the hot water storage tank 14 through the second valve 8 for heat storage, while the cold water in the hot water storage tank 14 flows sequentially through the fifth circulating water pump 11 and the fourth valve 12 into the primary heating network return water main. The second stream flows through the thirteenth valve 24 to the generator of the single-effect absorption chiller 43 for cooling, and then through the nineteenth valve 37 into the regenerator of the solution dehumidifier unit 41 to achieve concentrated solution regeneration. Finally, the primary heating network return water, after releasing heat and cooling, merges with the cold water from the hot water storage tank 14 through the twelfth valve 23 and returns to the heating stack side through the eighth valve 19. When the cooling load is high during the day, the hot water storage... The cold water in tank 14 enters the solar collector 16 through the sixth circulating water pump 17 and the seventh valve 18 to absorb heat and increase its temperature. The heated water is then stored in the hot water storage tank 14 through the sixth valve 15. At the same time, the hot water stored in the hot water storage tank 14 is combined with the primary heating network water supply at the outlet of the fourth circulating water pump 9, the third valve 10, and the ninth valve 20, and then transported to the generator of the single-effect absorption chiller 43 for cooling. It then enters the regenerator of the solution dehumidifier unit 41 through the nineteenth valve 37 to achieve concentrated solution regeneration. Finally, it is divided into two paths through the twelfth valve 23. The first path flows into the cold side inlet of the hot water storage tank 14 through the fifth valve 13, and the second path returns to the heating stack side through the eighth valve 19.

[0025] (III) Operation Method of Winter Heating Mode

[0026] The single-effect absorption chiller / thermal water heater 43 switches to heating mode;

[0027] The circulating water from the underground pipe absorbs heat from the surrounding soil in the cross-seasonal underground pipe heat storage device 28 and then heats up. It then passes through the seventh circulating water pump 27 and the fourteenth valve 26 to enter the third heat exchanger 25 to release heat and cool down. The low-temperature heat source return water from the evaporator outlet of the single-effect absorption chiller 43 passes through the twelfth circulating water pump 52 and the twenty-seventh valve 51 to enter the third heat exchanger 25 to absorb heat and heat up. It then passes through the twenty-eighth valve 53 to return to the evaporator of the single-effect absorption chiller 43 to release heat and cool down, thus completing the entire cross-seasonal heat extraction process.

[0028] During the daytime when the heat load is low, the cold water in the hot water storage tank 14 enters the solar collector 16 through the sixth circulating water pump 17 and the seventh valve 18 to absorb heat and increase its temperature. The heated water is then stored in the hot water storage tank 14 through the sixth valve 15. The primary heating network water supply is split into two paths at the outlet of the ninth valve 20. The first path flows into the hot water storage tank 14 through the second valve 8 for heat storage, while the cold water in the hot water storage tank 14 enters the primary heating network return water main through the fifth circulating water pump 11 and the fourth valve 12. The second path enters the generator of the single-effect absorption chiller / thermal water heater 43 through the thirteenth valve 24 for heating, and then enters the water-to-water heat exchanger 42 through the twentieth valve 38. On the side, after the final heat release and cooling, the return water from the primary heating network merges with the cold water from the hot water storage tank 14 via the twelfth valve 23, and then returns to the heating stack side via the eighth valve 19. When the heat load is high at night, the hot water stored in the hot water storage tank 14 merges with the primary heating network supply water at the outlet of the fourth circulating water pump 9, the third valve 10, and the ninth valve 20, and is then transported to the single-effect absorption chiller / thermal water generator 43 for heating. Then, it enters the hot side of the water-to-water heat exchanger 42 via the twentieth valve 38 to release heat and cool down. Finally, it is divided into two paths via the twelfth valve 23. The first path flows into the cold side inlet of the hot water storage tank 14 via the fifth valve 13, and the second path returns to the heating stack side via the eighth valve 19.

[0029] 1. The organic coupling of pool-type low-temperature heating stack, solar collector, and cross-seasonal buried pipe thermal storage device realizes the cross-seasonal storage and utilization of solar energy; during the heat storage and release process, the soil temperature is maintained within the temperature range of 30~50℃, and the heat loss during the cross-seasonal heat storage process is significantly reduced; in the heating mode, the energy efficiency ratio of the single-effect absorption chiller can reach 1.5~1.8, recovering a large amount of low-grade heat stored in the soil, reducing heating costs, and greatly improving the system's winter heating capacity.

[0030] 2. The user's energy station is equipped with a hot water storage tank, which can simultaneously store heat from the pool-type low-temperature heating stack and the heat collected by the solar collector; it realizes peak shaving for heating and cooling in winter and summer respectively; it not only improves the system's operational flexibility, but also reduces the system's designed installed capacity, reduces the initial investment in equipment, and improves the system's economy.

[0031] 3. During the winter cooling season, the primary heating network water sequentially enters the generator of the single-effect absorption chiller and the regenerator of the solution dehumidifier, enabling the cascade utilization of the primary heating network water supply. The temperature of the primary heating network water is reduced from 90℃ to 60℃, achieving independent temperature and humidity control. This not only increases the temperature difference between the supply and return water of the primary heating network but also raises the supply temperature of chilled water from 7℃ in conventional chillers to 16~18℃, thereby improving the cooling energy efficiency ratio of the single-effect absorption chiller.

[0032] 4. No additional peak-shaving heat source is required, saving investment in peak-shaving heat sources and significantly improving the system's economic efficiency. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of a multi-energy complementary combined cooling and heating system based on photonics, nuclear energy storage, and thermal energy. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1 The solar-nuclear-storage multi-energy complementary combined cooling and heating system described in this embodiment includes a heating reactor side consisting of a pool-type low-temperature heating reactor 1, a first circulating water pump 2, a first heat exchanger 3, a second circulating water pump 4, a second heat exchanger 5, a third circulating water pump 6, and a first valve 7. The heating reactor side consists of a second valve 8, a fourth circulating water pump 9, a third valve 10, a fifth circulating water pump 11, a fourth valve 12, a fifth valve 13, a hot water storage tank 14, a sixth valve 15, a solar collector 16, a sixth circulating water pump 17, a seventh valve 18, an eighth valve 19, a ninth valve 20, a tenth valve 21, an eleventh valve 22, a twelfth valve 23, a thirteenth valve 24, a third heat exchanger 25, a fourteenth valve 26, and a seventh circulating water... The user energy station side consists of: pump 27, cross-seasonal buried pipe heat storage device 28, cooling tower 29, fifteenth valve 30, eighth circulating water pump 31, sixteenth valve 32, seventeenth valve 33, eighteenth valve 34, ninth circulating water pump 35, heat user 36, nineteenth valve 37, twentieth valve 38, twenty-first valve 39, twenty-second valve 40, solution dehumidifier unit 41, water-to-water heat exchanger 42, single-effect absorption chiller / thermal water heater 43, twenty-third valve 44, tenth circulating water pump 45, twenty-fourth valve 46, cold user 47, twenty-fifth valve 48, eleventh circulating water pump 49, twenty-sixth valve 50, twenty-seventh valve 51, twelfth circulating water pump 52, and twenty-eighth valve 53.

[0036] An operation method for a photovoltaic-nuclear-storage multi-energy complementary combined cooling and heating system includes a heating reactor-side operation method and a user energy station-side operation method;

[0037] (a) Operation method of the heating reactor side

[0038] During the summer cooling and winter heating seasons, the primary loop water supply from the core outlet of the pool-type low-temperature heating reactor 1 enters the hot side of the first heat exchanger 3 via the first circulating water pump 2, transferring heat from the primary loop to the secondary loop. After absorbing heat on the cold side of the first heat exchanger 3, the secondary loop water supply enters the hot side of the second heat exchanger 5 via the second circulating water pump 4, transferring heat to the primary heating network water supply on the cold side of the second heat exchanger 5. The reactor regulating rod position is changed to adjust the core output power according to the cooling or heating load demand of the user's energy station.

[0039] (ii) User energy station operation methods include cross-seasonal thermal storage operation methods during non-cooling and non-heating seasons, summer cooling operation methods, and winter heating operation methods;

[0040] a) Operation methods for cross-seasonal heat storage modes during non-cooling and non-heating seasons

[0041] During the daytime hours of both the non-cooling and non-heating seasons, the operation method of the cross-seasonal thermal storage process is as follows: Open valves 10 (3rd), 13 (5th), 15 (6th), 18 (7th), 21 (10th), 22 (11th), and 26 (14th), and close all other valves. Cold water in the hot water storage tank 14 sequentially enters the solar collector 16 through the sixth circulating water pump 17 and the seventh valve 18 to absorb heat and increase its temperature. The heated water is then stored in the hot water storage tank 14 through the sixth valve 15. By controlling the flow rate of the circulating water entering the solar collector 16, the outlet temperature of the solar collector 16 is maintained at 90℃. Simultaneously, the water in the hot water storage tank 14... Hot water sequentially passes through the fourth circulating water pump 9, the third valve 10, and the tenth valve 21 into the third heat exchanger 25 to release heat and cool down. Then, it returns to the cold water inlet of the hot water storage tank 14 sequentially through the eleventh valve 22 and the fifth valve 13. After releasing heat and cooling down in the cross-seasonal buried pipe heat storage device 28, the circulating water supply from the buried pipe sequentially passes through the seventh circulating water pump 27 and the fourteenth valve 26 into the third heat exchanger 25 to absorb heat and increase its temperature. Then, it enters the cross-seasonal buried pipe heat storage device 28, storing the heat in the soil around the cross-seasonal buried pipe heat storage device 28. The soil gradually warms up, realizing cross-seasonal heat storage. During the cross-seasonal heat storage process, the soil temperature slowly rises from 30℃ to 50℃.

[0042] b) Summer Cooling Mode Operation Method

[0043] During the summer cooling season, the single-effect absorption chiller 43 switches to cooling mode.

[0044] Operating method of the primary heating network and heat storage tank process: When the cooling load is low at night, open valves 8, 12, 19, 20, 23, 24, and 37. The primary heating network water supply is split into two paths at the outlet of valve 20. The first path flows into the hot water storage tank 14 through valve 8 for heat storage. At the same time, the cold water in the hot water storage tank 14 enters the primary heating network return water main through the fifth circulating water pump 11 and valve 12. The second path flows to the generator of the single-effect absorption chiller 43 through valve 24 for cooling, and then enters the regenerator of the solution dehumidifier unit through valve 37 to achieve concentrated solution regeneration. Finally, the primary heating network return water after heat release and cooling merges with the cold water from the hot water storage tank 14 through valve 23 and returns to the heating stack side through valve 19. When the cooling load is high during the day, valves 10, 13, 15, 18, 19, 20, 23, 24, and 37 are opened. Cold water in the hot water storage tank 14 enters the solar collector 16 through the sixth circulating water pump 17 and the seventh valve 18 to absorb heat and increase its temperature. The heated water is then stored in the hot water storage tank 14 through the sixth valve 15. At the same time, the hot water stored in the hot water storage tank 14 is combined with the primary heating network water supply at the outlet of the fourth circulating water pump 9, the third valve 10, and the ninth valve 20, and sent together to the generator of the single-effect absorption chiller 43 for cooling. Then, it enters the regenerator of the solution dehumidifier unit through the nineteenth valve 37 to achieve concentrated solution regeneration. Finally, it is divided into two paths through the twelfth valve 23. The first path flows into the cold side inlet of the hot water storage tank 14 through the fifth valve 13, and the second path returns to the heating stack side through the eighth valve 19.

[0045] The operation method of the cooling water process is as follows: Open valves 15 (30), 16 (32), and 22 (40), and close valves 17 (33), 18 (34), and 21 (39). The cooling water supply from the cooling tower 29 enters the absorber and condenser of the single-effect absorption chiller 43 through the eighth circulating water pump 31, the sixteenth valve 32, and the twenty-second valve 40 in sequence. The cooling water that has absorbed heat and been heated returns to the cooling tower 29 through valve 15 (30).

[0046] Operating method of chilled water process and dehumidification solution process: Open valve 48 (25th) and valve 50 (26th), close valve 51 (27th) and valve 53 (28th). The chilled water return water enters the evaporator of the single-effect absorption chiller 43 through the 11th circulating water pump 49 and valve 48 (25th), and is then supplied to the dry fan coil unit of the chilled user 47 through valve 50 (26th). Open valve 44 (23rd) and valve 46 (24th). The dilute solution return liquid enters the solution side of the regenerator of the solution dehumidifier unit 41 through the first circulating pump 45 and valve 44 (23rd). After heat absorption and regeneration, it becomes a concentrated solution and is then supplied to the fresh air unit of the chilled user 47 through valve 46 (24th).

[0047] c) Operation method of winter heating mode

[0048] During the winter heating season, the single-effect absorption chiller / thermal water heater 43 switches to heating mode.

[0049] The operation method of the cross-seasonal heat extraction process is as follows: Open valves 26 (14th), 51 (27th), and 53 (28th), and close valves 21 (10th), 22 (11th), 48 (25th), and 50 (26th). The circulating water in the buried pipe absorbs heat from the surrounding soil in the cross-seasonal buried pipe heat storage device 28 and then heats up. It then passes through the seventh circulating water pump 27 and the fourteenth valve 26 to enter the third heat exchanger 25 to release heat and cool down. The low-temperature heat source return water from the evaporator outlet of the single-effect absorption chiller 43 passes through the twelfth circulating water pump 52 and the twenty-seventh valve 51 to enter the third heat exchanger 25 to absorb heat and heat up. It then returns to the evaporator of the single-effect absorption chiller 43 through the twenty-eighth valve 53 to release heat and cool down, completing the entire cross-seasonal heat extraction process. During the winter heat extraction process, the soil temperature slowly decreases from 50℃ to 30℃, and the temperature of the low-temperature heat source water supplied to the evaporator of the single-effect absorption chiller 43 slowly decreases from 45℃ to 25℃.

[0050] Operating method of the primary heating network and heat storage tank process: During the daytime when the heat load is low, open valves 2 (8), 4 (12), 6 (15), 7 (18), 8 (19), 9 (20), 12 (23), 13 (24), and 20 (38). Cold water in the hot water storage tank 14 enters the solar collector 16 through the sixth circulating water pump 17 and the seventh valve 18 to absorb heat and increase its temperature. The heated water is then stored in the hot water storage tank 14 through the sixth valve 15. The primary heating network water supply is split into two paths at the outlet of the ninth valve 20. The first path flows into the hot water storage tank 14 through the second valve 8 for heat storage, while the cold water in the hot water storage tank 14 enters the primary heating network return water main through the fifth circulating water pump 11 and the fourth valve 12. The second path enters the generator of the single-effect absorption chiller / thermal water heater 43 through the 13th valve 24 for heating, and then flows through the second... The water enters the hot side of the water-to-water heat exchanger 42 through valve 38. After the water is cooled down, the return water from the primary heating network is combined with the cold water from the hot water storage tank 14 through valve 23, and then returns to the heating stack side through valve 19. When the heat load is high at night, valves 10, 13, 19, 20, 23, 24, and 38 are opened. The hot water stored in the hot water storage tank 14 is combined with the primary heating network water from the outlet of valve 20 and valve 43 through the fourth circulating water pump 9. The water is then transported to the single-effect absorption chiller 43 generator for heating, and then enters the hot side of the water-to-water heat exchanger 42 through valve 38 to cool down. Finally, it is divided into two paths through valve 23. The first path flows into the cold side inlet of the hot water storage tank 14 through valve 13, and the second path returns to the heating stack side through valve 19.

[0051] Operating method of the secondary heating network process: Open valves 17 (33), 18 (34), 21 (39), and 22 (40), and close valves 15 (30) and 16 (32). The return water of the secondary heating network is divided into two paths through the 9th circulating water pump (35) and 18th valve (34). The first path enters the cold side of the water-to-water heat exchanger (42) through valve 21 (39), and the second path enters the absorber and condenser of the single-effect absorption chiller (43) through valve 22 (40). The secondary heating network supply water, after absorbing heat and increasing temperature, is supplied to the heat user (36) through valve 17 (33).

Claims

1. A light nuclear storage multi-energy complementary combined cooling heating and power system, characterized in that, The user energy station side comprises a pool type low temperature heat supply reactor (1), a first circulating water pump (2), a first heat exchanger (3), a second circulating water pump (4), a second heat exchanger (5), a third circulating water pump (6), a first valve (7), a second valve (8), a fourth circulating water pump (9), a third valve (10), a fifth circulating water pump (11), a fourth valve (12), a fifth valve (13), a hot water storage tank (14), a sixth valve (15), a solar collector (16), a sixth circulating water pump (17), a seventh valve (18), an eighth valve (19), a ninth valve (20), a tenth valve (21), an eleventh valve (22), a twelfth valve (23), a thirteenth valve (24), a third heat exchanger (25), a fourteenth valve (26), a seventh circulating water pump (27), a cross-season buried pipe heat storage device (28), a cooling tower (29), a fifteenth valve (30), an eighth circulating water pump (31), a sixteenth valve (32), a seventeenth valve (33), an eighteenth valve (34), a ninth circulating water pump (35), a heat user (36), a nineteenth valve (37), a twentieth valve (38), a twenty-first valve (39), a twenty-second valve (40), a solution dehumidification unit (41), a water-water heat exchanger (42), a single-effect absorption cold and warm water machine (43), a twenty-third valve (44), a tenth circulating water pump (45), a twenty-fourth valve (46), a cold user (47), a twenty-fifth valve (48), an eleventh circulating water pump (49), a twenty-sixth valve (50), a twenty-seventh valve (51), a twelfth circulating water pump (52), and a twenty-eighth valve (53). Specific connection relationship is: the pool type low temperature heat supply reactor (1) one loop water supply through connecting pipe in turn with first circulating water pump (2), first heat exchanger (3) hot side inlet is linked together, the heat is transmitted to two loop, first heat exchanger (3) cold side outlet through connecting pipe in turn with second circulating water pump (4), second heat exchanger (5) hot side inlet is linked together, the heat is transmitted to primary heat supply network, second heat exchanger (5) cold side outlet through connecting pipe in turn with third circulating water pump (6), first valve (7), ninth valve (20) is linked together;Ninth valve (20) outlet is divided into two roads, first road passes through connecting pipe in turn with second valve (8), hot water heat storage tank (14) hot side inlet is linked together;Second road passes through connecting pipe in turn with thirteenth valve (24), single effect absorption cold water machine (43) generator inlet is linked together;Single effect absorption cold water machine (43) generator outlet is divided into two roads, first road passes through connecting pipe in turn with nineteenth valve (37), solution dehumidification unit (41) regenerator heat source side inlet is linked together;Second road passes through connecting pipe in turn with twentieth valve (38), water-water heat exchanger (42) hot side inlet is linked together;Water-water heat exchanger (42) hot side outlet, solution dehumidification unit (41) regenerator heat source side outlet all with primary heat supply network backwater main pipe thirteenth valve (23) is linked together; Twelfth valve (23) outlet is divided into two roads, first road passes through connecting pipe in turn with fifth valve (13), hot water heat storage tank (14) cold side inlet is linked together, second road passes through connecting pipe with eighth valve (19) is linked together;Eighth valve (19) and second heat exchanger (5) cold side inlet is linked together;Hot water heat storage tank (14) cold side has two outlets, first cold side outlet passes through fifth circulating water pump (11), fourth valve (12) and eighth valve (19) in turn is linked together;Second cold side outlet passes through sixth circulating water pump (17), seventh valve (18) and solar energy collector (16) inlet in turn is linked together, solar energy collector (16) outlet passes through sixth valve (15) and hot water heat storage tank (14) hot side inlet in turn is linked together; The hot side outlet of the hot water storage tank (14) is communicated with the fourth circulating water pump (9) and the third valve (10) in sequence; the outlet of the third valve (10) is divided into two paths, the first path is communicated with the tenth valve (21) and the common node between the tenth valve (21) and the twenty-seventh valve (51) in sequence through the connecting pipe; the second path is communicated with the thirteenth valve (24) and the generator inlet of the single-effect absorption cold and warm water machine (43) in sequence through the connecting pipe; the evaporator outlet of the single-effect absorption cold and warm water machine (43) is divided into two paths, the first path is communicated with the twelfth circulating water pump (52), the twenty-seventh valve (51), the common node between the tenth valve (21) and the twenty-seventh valve (51) in sequence through the connecting pipe; the second path is communicated with the chilled water supply main through the twenty-sixth valve (50); the common node between the tenth valve (21) and the twenty-seventh valve (51) is communicated with the heat transfer working medium side inlet of the third heat exchanger (25) through the connecting pipe; the heat transfer working medium side outlet of the third heat exchanger (25) is divided into two paths, the first path is communicated with the eleventh valve (22), the fifth valve (13) and the cold side inlet of the hot water storage tank (14) in sequence through the connecting pipe; the second path is communicated with the twenty-eighth valve (53) and the evaporator inlet of the single-effect absorption cold and warm water machine (43) in sequence through the connecting pipe; The outlet of the cross-season underground pipe heat storage device (28) is communicated with the seventh circulating water pump (27), the fourteenth valve (26) and the underground pipe circulating water side inlet of the third heat exchanger (25) in sequence; the underground pipe circulating water side outlet of the third heat exchanger (25) is communicated with the inlet of the cross-season underground pipe heat storage device (28); The secondary heat network return water outlet of the heat user (36) is communicated with the ninth circulating water pump (35), the eighteenth valve (34) and the common node between the sixteenth valve (32) and the eighteenth valve (34) in sequence; the cooling water supply outlet of the cooling tower (29) is communicated with the eighth circulating water pump (31), the sixteenth valve (32) and the common node between the sixteenth valve (32) and the eighteenth valve (34) in sequence; the outlet of the common node between the sixteenth valve (32) and the eighteenth valve (34) is divided into two paths and communicated with the twenty-first valve (39) and the twenty-second valve (40) respectively, the outlet of the twenty-first valve (39) is communicated with the cold side of the water-water heat exchanger (42), the common node between the fifteenth valve (30) and the seventeenth valve (33) in sequence through the connecting pipe; the outlet of the twenty-second valve (40) is communicated with the absorber and condenser of the single-effect absorption cold and warm water machine (43), the common node between the fifteenth valve (30) and the seventeenth valve (33) in sequence through the connecting pipe; the outlet of the common node between the fifteenth valve (30) and the seventeenth valve (33) is divided into two paths, the first path is communicated with the seventeenth valve (33) and the heat user (36) in sequence through the connecting pipe; the second path is communicated with the fifteenth valve (30) and the cooling tower (29) in sequence through the connecting pipe; The cold user (47) new fan unit dilute solution return liquid outlet is connected with the tenth circulating water pump (45), the twenty-third valve (44) and the regenerator solution side inlet of the solution dehumidification unit (41) through a connecting pipe, the regenerator solution side outlet of the solution dehumidification unit (41) is connected with the concentrated solution supply liquid main through a connecting pipe and the twenty-fourth valve (46); the chilled water return water outlet of the cold user (47) is connected with the eleventh circulating water pump (49), the twenty-fifth valve (48) and the evaporator inlet of the single-effect absorption cold and warm water machine (43) through a connecting pipe.

2. The optical nuclear storage multi-energy complementary combined cooling heating and power system according to claim 1, characterized in that, The working medium of the single-effect absorption cold and warm water machine (43) is lithium bromide solution; the working medium of the solution dehumidification unit (41) is lithium chloride solution; the regenerator of the solution dehumidification unit (41) is driven by the primary heat network hot water after the generator of the single-effect absorption cold and warm water machine (43) is cooled.

3. The optical nuclear storage multi-energy complementary combined cooling heating and power system of claim 1, wherein, The solar heat collector (16) is always kept in full load operation, and there is no light abandonment phenomenon.

4. The operation method of the optical nuclear storage multi-energy complementary combined cooling and heating system according to any one of claims 1 to 3, characterized in that, The method comprises a heat supply stack side operation method and a user energy station side operation method. The heat supply stack side operation method is that when cooling in summer and heating in winter, the one-loop water supply at the outlet of the pool-type low-temperature heat supply stack (1) core enters the hot side of the first heat exchanger (3) through the first circulating water pump (2), and the heat is transferred from the one-loop to the two-loop; the two-loop water supply after absorbing heat at the cold side of the first heat exchanger (3) enters the hot side of the second heat exchanger (5) through the second circulating water pump (4), and the heat is transferred to the primary heat network water supply at the cold side of the second heat exchanger (5); according to the cooling load or heating load demand of the user energy station side, the reactor control rod position is changed to adjust the core output power; The user energy station side operation method comprises a non-cooling season and non-heating season cross-season heat storage mode operation method, a summer cooling mode operation method and a winter heating mode operation method. (1) Non-cooling season and non-heating season cross-season heat storage mode operation method In the daytime of the non-cooling season and the non-heating season, the cold water in the hot water storage tank (14) enters the solar heat collector (16) to absorb heat and rise in temperature through the sixth circulating water pump (17) and the seventh valve (18) in turn, and the hot water after absorbing heat and rising in temperature is stored in the hot water storage tank (14) through the sixth valve (15); at the same time, the hot water in the hot water storage tank (14) enters the third heat exchanger (25) to release heat and fall in temperature through the fourth circulating water pump (9), the third valve (10) and the tenth valve (21) in turn, and then returns to the cold water inlet of the hot water storage tank (14) through the eleventh valve (22) and the fifth valve (13) in turn; the buried pipe circulating water supply after releasing heat and falling in temperature in the cross-season buried pipe heat storage device (28) enters the third heat exchanger (25) to absorb heat and rise in temperature through the seventh circulating water pump (27) and the fourteenth valve (26) in turn, and then enters the cross-season buried pipe heat storage device (28) to store heat in the soil surrounding the cross-season buried pipe heat storage device (28), so that the soil slowly rises in temperature, and cross-season heat storage is realized. The single-effect absorption cold and warm water machine (43) is switched to the refrigeration mode; When the cold load is low at night, the primary heat supply water at the outlet of the ninth valve (20) is divided into two paths, the first path flows into the hot water storage tank (14) through the second valve (8) for heat storage, and the cold water in the hot water storage tank (14) enters the primary heat return main in turn through the fifth circulating water pump (11) and the fourth valve (12); the second path flows to the generator of the single-effect absorption cold and warm water machine (43) for refrigeration, and then enters the regenerator of the solution dehumidification unit (41) through the nineteenth valve (37) to regenerate the concentrated solution; and the primary heat return water after heat release and cooling is combined with the cold water from the hot water storage tank (14) through the twelfth valve (23), and returns to the heat supply pile side through the eighth valve (19); when the cold load is high during the day, the cold water in the hot water storage tank (14) is heated and warmed in the solar collector (16) in turn through the sixth circulating water pump (17) and the seventh valve (18), the heated and warmed hot water is stored in the hot water storage tank (14) through the sixth valve (15); at the same time, the hot water stored in the hot water storage tank (14) is combined with the primary heat supply water at the outlet of the ninth valve (20) through the fourth circulating water pump (9) and the third valve (10), and is delivered to the generator of the single-effect absorption cold and warm water machine (43) for refrigeration, and then enters the regenerator of the solution dehumidification unit (41) through the nineteenth valve (37) to regenerate the concentrated solution; finally, it is divided into two paths through the twelfth valve (23), the first path flows into the cold side inlet of the hot water storage tank (14) through the fifth valve (13), and the second path returns to the heat supply pile side through the eighth valve (19); (Three) winter heating mode operation method The single-effect absorption cold and warm water machine (43) is switched to the heating mode; The buried pipe circulating return water is heated after absorbing the surrounding soil heat in the cross-season buried pipe heat storage device (28), and is then heated and warmed in the third heat exchanger (25) in turn through the seventh circulating water pump (27) and the fourteenth valve (26); the low-temperature heat source return water at the outlet of the evaporator of the single-effect absorption cold and warm water machine (43) is heated and warmed in the third heat exchanger (25) in turn through the twelfth circulating water pump (52) and the twenty-seventh valve (51), and then returns to the evaporator of the single-effect absorption cold and warm water machine (43) through the twenty-eighth valve (53) for heat release and cooling, completing the entire cross-season heat extraction process; When the heat load is low in daytime, the cold water in the hot water storage tank (14) is heated in the solar collector (16) in turn through the sixth circulating water pump (17) and the seventh valve (18), and the heated hot water is stored in the hot water storage tank (14) through the sixth valve (15); the primary heat supply is divided into two routes at the outlet of the ninth valve (20), the first route flows into the hot water storage tank (14) through the second valve (8) for heat storage, and the cold water in the hot water storage tank (14) flows into the primary heat return main pipe in turn through the fifth circulating water pump (11) and the fourth valve (12); the second route flows into the generator of the single-effect absorption cold and warm water machine (43) for heating, then enters the water-water heat exchanger (42) hot side through the twentieth valve (38), and finally the primary heat return water after heat release and temperature drop is combined with the cold water from the hot water storage tank (14) through the twelfth valve (23), and then returns to the heat supply pile side through the eighth valve (19); when the heat load is high at night, the hot water stored in the hot water storage tank (14) is combined with the primary heat supply at the outlet of the ninth valve (20) through the fourth circulating water pump (9) and the third valve (10), and then is delivered to the generator of the single-effect absorption cold and warm water machine (43) for heating, and then enters the water-water heat exchanger (42) hot side through the twentieth valve (38) for heat release and temperature drop; finally, it is divided into two routes through the twelfth valve (23), the first route flows into the hot water storage tank (14) cold side inlet through the fifth valve (13), and the second route returns to the heat supply pile side through the eighth valve (19).

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