CN109059312B - Multi-tank type heat storage device and method for fused salt storage tank of photo-thermal power station - Google Patents
Multi-tank type heat storage device and method for fused salt storage tank of photo-thermal power station Download PDFInfo
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- CN109059312B CN109059312B CN201810735834.5A CN201810735834A CN109059312B CN 109059312 B CN109059312 B CN 109059312B CN 201810735834 A CN201810735834 A CN 201810735834A CN 109059312 B CN109059312 B CN 109059312B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
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Abstract
The invention belongs to the technical field of energy storage of photo-thermal power stations, and particularly relates to a multi-tank type heat storage device and a multi-tank type heat storage method for a fused salt storage tank of a photo-thermal power station, which at least comprise a mirror field heat collector, a cold/hot molten salt heat exchanger, a first valve, a first hot tank, a first cold tank, an outlet of the mirror field heat collector, the first hot tank, the first valve, the cold/hot molten salt heat exchanger, the first cold tank and an inlet of the mirror field heat collector which are sequentially connected, so that the problem that the risk of storage tank accident leakage is continuously increased along with the continuous increase of heat storage time and storage tank volume of a large-scale photo-thermal power station with an installed machine in the prior art is solved, the risk, and then increased the problem of initial investment, it is few to have the storage tank quantity, and normal residual fused salt is with low costs, reduces the power consumption cost, reduces the influence that the heat-retaining system storage tank takes place the damage, improves the characteristics of the flexibility of heat-retaining system operation.
Description
Technical Field
The invention belongs to the technical field of energy storage of photo-thermal power stations, and particularly relates to a multi-tank type heat storage device and method for a fused salt storage tank of a photo-thermal power station.
Background
Solar energy is a novel energy source which is most widely applied, developed fastest and mature in technology at present.
Solar energy is influenced by natural seasons and climate, and shows randomness, fluctuation and intermittency, and the grid-connected operation of electric energy requires continuity and stability of electric energy, and a photovoltaic power generation system is difficult to provide continuous and stable energy in independent operation, so that the problem of unbalance of power output before peak power utilization and in valley power utilization exists.
The solar-thermal power generation system can store energy by using the heat storage tank and transfer the energy when needed, so that the solar-thermal power generation system has the capacity of adjusting load. The solar thermal power generation system with the heat storage device can improve the power generation efficiency of the system, reduce the power generation cost and improve the stability and continuity of the solar thermal power generation system. Under the condition of solar radiation loss, the steam turbine generator unit still can meet the requirement of load power generation by utilizing the heat release of the heat storage system. Under the condition that the capacity of the heat storage system is enough, the unit can generate electricity continuously for 24 hours. The solar thermal power generation system with the large-capacity heat storage device has the capacity of participating in system peak regulation, has the capacity of receiving fluctuating renewable energy sources, and can be connected into a power grid in a friendly way. The basic peak regulation capacity of the photothermal power generation system with the heat storage device can be compared favorably with the traditional power generation modes of coal power, gas power generation and nuclear power, can be used as a basic supporting power supply, has the potential of competition with the traditional power plant, and is incomparable to a photovoltaic power generation system and a wind power generation system and one of important reasons for high-speed development of the photovoltaic power generation system and the wind power generation system.
At present, the fused salt storage tank which is an important component equipment in an energy storage system of a photo-thermal power station accounts for about 5 percent of the original investment and has high investment; in the actual operation of the photo-thermal power station, molten salt with the height of nearly 1m at the bottom of the storage tank cannot be utilized, so that the initial investment is increased; along with the continuous development of present light and heat technique, the light and heat power station of large-scale installation scale constantly emerges, and the heat-retaining is long also constantly increases, and the storage tank volume increases thereupon, along with the constantly increasing of storage tank diameter, the risk that the storage tank accident was revealed also constantly increases, need adopt the method that many jars of group jar was handled, reduces the storage tank and reveals the risk, has further increased the initial investment. For example, a photothermal power station equipped with a 6h heat storage 50MW installed scale would have a normal residual molten salt value of approximately 310 ten thousand yuan, while reducing 1 cold molten salt storage tank would save approximately 650 ten thousand yuan.
Therefore, according to the development requirement of the photo-thermal power station, the multi-tank heat storage device is selected, the number of the storage tanks can be reduced, the land acquisition area is reduced, the salt purchasing cost and the operating cost are reduced, and the electricity consumption cost is reduced to a certain extent.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, the risk of accident leakage of a storage tank is increased along with the continuous increase of heat storage time and the volume of the storage tank in a large installed-scale photo-thermal power station, the leakage risk of the storage tank is reduced by adopting a multi-tank component tank treatment method, and further the initial investment is increased.
Therefore, the invention provides a multi-tank type heat storage device of a fused salt storage tank of a photo-thermal power station, which at least comprises a mirror field heat collector, a cold/hot fused salt heat exchanger, a first valve, a first hot tank and a first cold tank, wherein the outlet of the mirror field heat collector, the first hot tank, the first valve, the cold/hot fused salt heat exchanger, the first cold tank and the inlet of the mirror field heat collector are sequentially connected.
The multi-tank heat storage device of the fused salt storage tank of the photo-thermal power station further comprises a second valve, and the second valve is connected between the mirror field heat collector and the first hot tank.
The multi-tank heat storage device of the fused salt storage tank of the photo-thermal power station further comprises a second valve, a hot/cold tank, a third valve, a fourth valve and a fifth valve, the second valve is connected between the first hot tank and the hot/cold tank, one path of an outlet of the hot/cold tank is connected with an inlet of the mirror field heat collector through the third valve, the other path of the outlet of the hot/cold tank is connected with a cold/hot molten salt heat exchanger through the fifth valve, one end of the fourth valve is connected to a pipeline between the cold/hot molten salt heat exchanger and the first cold tank, and the other end of the fourth valve is connected with an inlet of the hot/cold tank.
The multi-tank heat storage device of the fused salt storage tank of the photo-thermal power station further comprises a second valve, a hot/cold tank, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, an eighth valve, a second hot tank, a tenth valve and a ninth valve, the second valve is connected between the mirror field heat collector and the first hot tank, an outlet of the first hot tank is sequentially connected with the third valve and the second hot tank, one path of an outlet of the second hot tank is connected with an inlet of the cold/hot molten salt heat exchanger through the fourth valve, the other path of an outlet of the second hot tank is connected with the hot/cold tank through the eighth valve, one path of an outlet of the cold/hot molten salt heat exchanger is connected with an inlet of the first cold tank through the fifth valve, the other path of an outlet of the cold/hot molten salt heat exchanger is connected with the hot/cold tank through the seventh valve, and the sixth valve is connected between the first cold tank and the hot/cold tank, the outlet of the mirror field heat collector is connected with the inlet of an eighth valve, one path of the outlet of the eighth valve is connected with the inlet of the second hot tank, and the other path of the outlet of the eighth valve is connected with the inlet of the hot/cold tank through a ninth valve.
A multi-tank heat storage method for a fused salt storage tank of a photo-thermal power station is characterized in that in daytime, low-temperature fused salt in a first cold tank exchanges heat through a mirror field heat collector, high-temperature fused salt is stored in a first hot tank, and the hot/cold tank is used as a hot tank for storing heat; and at night, extracting the high-temperature molten salt in the first hot tank, and storing the low-temperature molten salt in the first cold tank or the heat-releasing hot/cold tank after the high-temperature molten salt in the first hot tank exchanges heat through the cold/hot molten salt heat exchanger.
The number of the first hot tanks is more than that of the hot/cold tanks, the number of the hot/cold tanks is one less than that of the first hot tanks, in daytime, low-temperature molten salt in the first cold tanks exchanges heat through the mirror field heat collector, the plurality of first hot tanks store high-temperature molten salt, and the plurality of hot/cold tanks store heat as the hot tanks; and at night, extracting the high-temperature molten salt in the first hot tanks, and storing the low-temperature molten salt in the first cold tanks or the plurality of heat-releasing hot/cold tanks after the high-temperature molten salt in the plurality of first hot tanks exchanges heat through the cold/hot molten salt heat exchangers.
The number of the first hot tanks is 2, namely the first hot tanks and the second hot tanks, in daytime, the low-temperature molten salt in the first cold tank exchanges heat through the mirror field heat collector, the first hot tanks and the second hot tanks store high-temperature molten salt in sequence, and the hot/cold tanks store heat as the hot tanks; and at night, sequentially extracting the high-temperature molten salt in the first hot tank and the second hot tank, or simultaneously extracting the high-temperature molten salt in the first hot tank and the second hot tank, and storing the low-temperature molten salt in the first cold tank or the heat-releasing hot/cold tank after the high-temperature molten salt exchanges heat through the cold/hot molten salt heat exchanger.
The invention has the beneficial effects that: the invention provides a multi-tank heat storage device and a method for a fused salt storage tank of a photo-thermal power station, wherein one or more storage tanks are adopted as a cold/hot tank, the cold/hot tank is used as a hot tank for storing heat in the daytime, the cold/hot tank is used as a cold tank after releasing heat in the nighttime, and the fused salt is circulated in a heat collection system, a heat storage system and a heat exchange system by pumping of a fused salt pump on the top of the tank by utilizing the opening sequence of different valves to store and release heat of the fused salt, so that power generation is realized, the purpose of reducing the storage tanks is realized, the land acquisition area can be reduced, and the initial investment and the operation cost of the; the method has the advantages that the actual operation is simple and flexible, the opening sequence of the valves only needs to be controlled, the valve opening sequence combinations are more, the number of the storage tanks needed by the heat storage method is small, the normal residual molten salt cost is low, the electricity consumption cost can be reduced, the damage influence on the storage tanks of the heat storage system can be reduced, and the operation flexibility of the heat storage system can be improved.
Drawings
The present invention will be described in further detail below with reference to the accompanying drawings.
FIG. 1 is a schematic flow diagram of a two-tank heat storage device and method for a molten salt storage tank of a photo-thermal power station;
FIG. 2 is a schematic flow diagram of a three-tank heat storage device and method for a molten salt storage tank of a photo-thermal power station;
FIG. 3 is a schematic flow diagram of a four-tank heat storage device and method for a fused salt storage tank of a photo-thermal power station.
Description of reference numerals: 1. a mirror field collector; 2. a cold/hot molten salt heat exchanger; 3. a first valve; 4. a first hot tank; 5. a first cold tank; 6. a second valve; 7. a hot/cold tank; 8. a third valve; 9. a fourth valve; 10. a fifth valve; 11. a first storage tank; 12. a sixth valve; 13. a seventh valve; 14. an eighth valve; 15. a second hot tank; 16. a second storage tank; 17. a tenth valve; 18. a ninth valve.
Detailed Description
Example 1:
as shown in fig. 1, the multi-tank heat storage device of the fused salt storage tank of the photothermal power station at least comprises a mirror field heat collector 1, a cold/hot molten salt heat exchanger 2, a first valve 3, a first hot tank 4 and a first cold tank 5, wherein an outlet of the mirror field heat collector 1, the first hot tank 4, the first valve 3, the cold/hot molten salt heat exchanger 2, the first cold tank 5 and an inlet of the mirror field heat collector 1 are sequentially connected; in daytime, the first valve 3 is closed, the low-temperature molten salt in the first cold tank 5 exchanges heat through the mirror field heat collector 1, and the first hot tank 4 stores the high-temperature molten salt; at night, the first valve 3 is opened to extract the high-temperature molten salt in the first hot tank 4, the high-temperature molten salt in the first hot tank 4 is subjected to heat exchange through the cold/hot molten salt heat exchanger 2, and then the low-temperature molten salt is stored in the first cold tank 5. The operation is simple and flexible.
The multi-tank heat storage device of the fused salt storage tank of the photo-thermal power station further comprises a second valve 6, and the second valve 6 is connected between the mirror field heat collector 1 and the first hot tank 4. The second valve 6 can control the flow direction of the molten salt, the valve sequence has a plurality of combinations, and the operation is simple and flexible.
Example 2:
as shown in fig. 2, the multi-tank heat storage device of the fused salt storage tank of the photothermal power station further comprises a second valve 6, a hot/cold tank 7, a third valve 8, a fourth valve 9 and a fifth valve 10, wherein the second valve 6 is connected between the first hot tank 4 and the hot/cold tank 7, one path of an outlet of the hot/cold tank 7 is connected with an inlet of the mirror field heat collector 1 through the third valve 8, the other path of the outlet of the hot/cold tank 7 is connected with the cold/hot molten salt heat exchanger 2 through the fifth valve 10, one end of the fourth valve 9 is connected on a pipeline between the cold/hot molten salt heat exchanger 2 and the first cold tank 5, and the other end of the fourth valve 9 is connected with an inlet of the hot/cold tank 7. By controlling the second valve 6, the third valve 8, the fourth valve 9 and the fifth valve 10, the multi-tank heat storage device of the fused salt storage tank of the photo-thermal power station can realize the circulation of the fused salt in a heat collection system, a heat storage system and a heat exchange system, so as to complete heat storage and heat release, in daytime, the low-temperature fused salt in the first cold tank 5 exchanges heat through the mirror field heat collector 1, the first hot tank 4 stores high-temperature fused salt, and the hot/cold tank 7 stores heat as a hot tank; at night, the pump pumps the high-temperature molten salt in the first hot tank 4, and after the high-temperature molten salt in the first hot tank 4 exchanges heat through the cold/hot molten salt heat exchanger 2, the low-temperature molten salt is stored in the first cold tank 5 or the heat-releasing hot/cold tank 7. The invention can build less 1 first storage tank 11 on the basis of conventional 4-tank heat storage, can reduce land acquisition area, and reduce the initial investment and operation cost of the photo-thermal power station; the method has the advantages of simple and flexible actual operation, and only needs to control the opening sequence of the valves, and the valve opening sequence has more combinations.
Example 3
As shown in fig. 3, the multi-tank heat storage device of the fused salt storage tank of the photothermal power station further comprises a second valve 6, a hot/cold tank 7, a third valve 8, a fourth valve 9, a fifth valve 10, a sixth valve 12, a seventh valve 13, an eighth valve 14, a second hot tank 15, a tenth valve 17 and a ninth valve 18, the second valve 6 is connected between the mirror field heat collector 1 and the first hot tank 4, an outlet of the first hot tank 4 is sequentially connected with the third valve 8 and the second hot tank 15, one path of an outlet of the second hot tank 15 is connected with an inlet of the cold/hot molten salt heat exchanger 2 through the fourth valve 9, the other path of an outlet of the second hot tank 15 is connected with the hot/cold tank 7 through the eighth valve 14, one path of an outlet of the cold/hot molten salt heat exchanger 2 is connected with an inlet of the first cold tank 5 through the fifth valve 10, the other path of an outlet of the cold/hot molten salt heat exchanger 2 is connected with the hot/cold tank 7 through the seventh valve 13, the sixth valve 12 is connected between the first cold tank 5 and the hot/cold tank 7, the outlet of the field mirror collector 1 is connected with the inlet of the tenth valve 17, one path of the outlet of the tenth valve 17 is connected with the inlet of the second hot tank 15, and the other path of the outlet of the tenth valve 17 is connected with the inlet of the hot/cold tank 7 through the ninth valve 18.
By controlling the second valve 6, the third valve 8, the fourth valve 9, the fifth valve 10, the sixth valve 12, the seventh valve 13, the eighth valve 14, the tenth valve 17 and the ninth valve 18, the multi-tank heat storage device of the fused salt storage tank of the photothermal power station can realize the circulation of the fused salt in a heat collection system, a heat storage system and a heat exchange system to finish heat storage and heat release, in the daytime, the low-temperature fused salt in the first cold tank 5 exchanges heat through the mirror field heat collector 1, the first hot tank 4 and the second hot tank 15 can store high-temperature fused salt in sequence, and the hot/cold tank 7 is used as a hot tank for heat storage; at night, the high-temperature molten salt in the first hot tank 4 and the second hot tank 15 can be extracted in sequence, the high-temperature molten salt in the first hot tank 4 and the second hot tank 15 can also be extracted simultaneously, and after the high-temperature molten salt is subjected to heat exchange through the cold/hot molten salt heat exchanger 2, the low-temperature molten salt is stored in the first cold tank 5 or the heat-releasing hot/cold tank 7. The invention builds 2 less storage tanks, namely the first storage tank 11 and the second storage tank 16, on the basis of conventional 6-tank heat storage, can reduce land acquisition area and reduce the initial investment and the operation cost of the photo-thermal power station; the method has the advantages of simple and flexible actual operation, and only needs to control the opening sequence of the valves, and the valve opening sequence has more combinations.
Example 4
A multi-tank heat storage method for a fused salt storage tank of a photo-thermal power station is characterized in that in daytime, low-temperature fused salt in a first cold tank 5 exchanges heat through a mirror field heat collector 1, a first hot tank 4 stores high-temperature fused salt, and a hot/cold tank 7 serves as a hot tank to store heat; and at night, extracting the high-temperature molten salt in the first hot tank 4, and storing the low-temperature molten salt in the first cold tank 5 or the heat-releasing hot/cold tank 7 after the high-temperature molten salt in the first hot tank 4 exchanges heat through the cold/hot molten salt heat exchanger 2.
The number of the first hot tanks 4 is multiple, the number of the hot/cold tanks 7 is one less than that of the first hot tanks 4, in daytime, low-temperature molten salt in the first cold tank 5 exchanges heat through the mirror field heat collector 1, the multiple first hot tanks 4 store high-temperature molten salt, and the multiple hot/cold tanks 7 store heat as hot tanks; at night, high-temperature molten salt in the first hot tanks 4 is extracted, and after the high-temperature molten salt in the plurality of first hot tanks 4 is subjected to heat exchange through the cold/hot molten salt heat exchanger 2, low-temperature molten salt is stored in the first cold tank 5 or in the plurality of heat-releasing hot/cold tanks 7.
The number of the first hot tanks 4 is 2, namely the first hot tanks 4 and the second hot tanks 15, in daytime, the low-temperature molten salt in the first cold tank 5 exchanges heat through the mirror field heat collector 1, the first hot tanks 4 and the second hot tanks 15 sequentially store high-temperature molten salt, and the hot/cold tanks 7 store heat as the hot tanks; and at night, the high-temperature molten salt in the first hot tank 4 and the second hot tank 15 is extracted in sequence, or the high-temperature molten salt in the first hot tank 4 and the second hot tank 15 is extracted simultaneously, and after the high-temperature molten salt is subjected to heat exchange by the cold/hot molten salt heat exchanger 2, the low-temperature molten salt is stored in the first cold tank 5 or the heat-releasing hot/cold tank 7.
One or more storage tanks are used as cold/hot tank forms, the opening sequence of different valves is utilized, and the molten salt is pumped by a molten salt pump on the top of the tank to circulate in a heat collection system, a heat storage system and a heat exchange system, so that the molten salt is subjected to heat storage and heat release, and power generation is realized, namely when 2n (n is the number of groups of cold and hot storage tanks) of the storage tanks, the number of (n-1) cold molten salt storage tanks can be reduced, and the purposes of reducing the number of the cold molten salt storage tanks and reducing initial investment are achieved.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (4)
1. The utility model provides a many cans formula heat-retaining device of light and heat power station fused salt storage tank which characterized in that: the device at least comprises a mirror field heat collector (1), a cold/hot molten salt heat exchanger (2), a first valve (3), a first hot tank (4) and a first cold tank (5), wherein an outlet of the mirror field heat collector (1), the first hot tank (4), the first valve (3), the cold/hot molten salt heat exchanger (2), the first cold tank (5) and an inlet of the mirror field heat collector (1) are sequentially connected; the multi-tank heat storage device of the fused salt storage tank of the photo-thermal power station further comprises a second valve (6), a hot/cold tank (7), a third valve (8), a fourth valve (9) and a fifth valve (10), the second valve (6) is connected between the first hot tank (4) and the hot/cold tank (7), one path of an outlet of the hot/cold tank (7) is connected with an inlet of the mirror field heat collector (1) through the third valve (8), the other path of the outlet of the hot/cold tank (7) is connected with the cold/hot-molten salt heat exchanger (2) through the fifth valve (10), one end of the fourth valve (9) is connected to a pipeline between the cold/hot-molten salt heat exchanger (2) and the first cold tank (5), and the other end of the fourth valve (9) is connected with the inlet of the hot/cold tank (7).
2. The utility model provides a many cans formula heat-retaining device of light and heat power station fused salt storage tank, includes mirror field heat collector (1), cold/hot molten salt heat exchanger (2), first valve (3), first hot jar (4), first cold jar (5) at least, and the entry of the export of mirror field heat collector (1), first hot jar (4), first valve (3), cold/hot molten salt heat exchanger (2), first cold jar (5) and mirror field heat collector (1) connects gradually, its characterized in that: the multi-tank heat storage device of the fused salt storage tank of the photo-thermal power station further comprises a second valve (6), a hot/cold tank (7), a third valve (8), a fourth valve (9), a fifth valve (10), a sixth valve (12), a seventh valve (13), an eighth valve (14), a second hot tank (15), a tenth valve (17) and a ninth valve (18), the second valve (6) is connected between the mirror field heat collector (1) and the first hot tank (4), an outlet of the first hot tank (4) is sequentially connected with the third valve (8) and the second hot tank (15), one path of an outlet of the second hot tank (15) is connected with an inlet of the cold/hot molten salt heat exchanger (2) through the fourth valve (9), the other path of an outlet of the second hot tank (15) is connected with the hot/cold tank (7) through the eighth valve (14), one path of an outlet of the cold/hot molten salt heat exchanger (2) is connected with an inlet of the first cold tank (5) through the fifth valve (10), the other path of the outlet of the cold/hot molten salt heat exchanger (2) is connected with the hot/cold tank (7) through a seventh valve (13), a sixth valve (12) is connected between the first cold tank (5) and the hot/cold tank (7), the outlet of the mirror field heat collector (1) is connected with the inlet of a tenth valve (17), the other path of the outlet of the tenth valve (17) is connected with the inlet of a second hot tank (15), and the other path of the outlet of the tenth valve (17) is connected with the inlet of the hot/cold tank (7) through a ninth valve (18).
3. A multi-tank heat storage method of a molten salt storage tank of a photothermal power station, which is performed using the multi-tank heat storage device of the molten salt storage tank of the photothermal power station according to claim 1, characterized in that: in daytime, the low-temperature molten salt in the first cold tank (5) exchanges heat through the mirror field heat collector (1), the first hot tank (4) stores high-temperature molten salt, and the hot/cold tank (7) stores heat as a hot tank; and at night, extracting high-temperature molten salt in the first hot tank (4), and storing the low-temperature molten salt in the first cold tank (5) or the heat-releasing hot/cold tank (7) after the high-temperature molten salt in the first hot tank (4) exchanges heat through the cold/hot molten salt heat exchanger (2).
4. A multi-tank heat storage method of a molten salt storage tank of a photothermal power station, which is performed using the multi-tank heat storage device of the molten salt storage tank of the photothermal power station according to claim 2, characterized in that: the number of the first hot tanks (4) is 2, namely the first hot tanks (4) and the second hot tanks (15), in daytime, the low-temperature molten salt in the first cold tank (5) exchanges heat through the mirror field heat collector (1), the first hot tanks (4) and the second hot tanks (15) store the high-temperature molten salt in sequence, and the hot/cold tanks (7) store heat as the hot tanks; and at night, high-temperature molten salt in the first hot tank (4) and the second hot tank (15) is extracted in sequence, or high-temperature molten salt in the first hot tank (4) and the second hot tank (15) is extracted simultaneously, and after the high-temperature molten salt exchanges heat through the cold/hot molten salt heat exchanger (2), low-temperature molten salt is stored in the first cold tank (5) or the heat-releasing hot/cold tank (7).
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| CN109059312A (en) | 2018-12-21 |
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