CN110953735A - Hybrid heat storage system for photo-thermal power station and operation method thereof - Google Patents
Hybrid heat storage system for photo-thermal power station and operation method thereof Download PDFInfo
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- CN110953735A CN110953735A CN201911305979.2A CN201911305979A CN110953735A CN 110953735 A CN110953735 A CN 110953735A CN 201911305979 A CN201911305979 A CN 201911305979A CN 110953735 A CN110953735 A CN 110953735A
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- 238000005338 heat storage Methods 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000013529 heat transfer fluid Substances 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 239000000945 filler Substances 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 8
- 150000003839 salts Chemical class 0.000 claims description 7
- 239000002775 capsule Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 239000011232 storage material Substances 0.000 claims description 6
- 239000012071 phase Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 3
- 229910002651 NO3 Inorganic materials 0.000 claims description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- 230000005496 eutectics Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000007791 liquid phase Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
- F24S23/77—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with flat reflective plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
- F24S60/30—Arrangements for storing heat collected by solar heat collectors storing heat in liquids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D2020/0065—Details, e.g. particular heat storage tanks, auxiliary members within tanks
- F28D2020/0082—Multiple tanks arrangements, e.g. adjacent tanks, tank in tank
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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
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
A mixed heat storage system for a photo-thermal power station and an operation method thereof are disclosed, based on a control system, according to inlet and outlet temperatures of a packed bed heat reservoir, an outlet temperature of a hot tank and an outlet temperature of a cold tank, the flow of heat transfer fluid flowing through the packed bed heat reservoir and a double-tank heat reservoir is adjusted through controlling a valve and a liquid pump, the outlet temperature of the mixed heat storage system is adjusted through a method of mixing fluids with different temperatures, and under the condition that the outlet temperature limit is met, the purposes of improving the capacity utilization rate of the mixed heat storage system and reducing the heat storage cost are achieved. The invention can flexibly adjust the flow passing through the single-tank heat reservoir and the double-tank heat reservoir, meets the requirements of different outlet temperatures of the heat storage system, and greatly widens the application range of the heat storage system. Meanwhile, the system is flexible in size and arrangement, different sizes of the packed bed heat reservoir, different types of fillers and different sizes of the double-tank heat reservoir can be selected according to the size of the required heat storage amount, and the application range is wide.
Description
Technical Field
The invention belongs to the field of solar heat energy storage and utilization, and particularly relates to a hybrid heat storage system for a photo-thermal power station and an operation method thereof.
Background
The efficient utilization of solar energy has important strategic significance for realizing clean sustainable development and self-sufficiency of energy sources in China. However, in the process of utilizing solar energy, the discontinuity and unstable characteristics of solar radiation cause mismatching of energy supply and demand between time and space, so that the improvement of solar energy utilization efficiency is restricted, the development of solar energy industry is inhibited, and the process of clean energy utilization in China is hindered.
The light-gathering and heat-collecting power station can store heat energy at low cost and large scale, realizes clean, efficient, stable and low-cost power generation, and is a solar energy high-efficiency utilization technology with great prospect. The packed bed heat reservoir adopts cheap solid heat storage particles such as rocks to replace expensive molten salt as a heat storage medium, can store and release heat energy in the photo-thermal power station, and further reduces the power generation cost of the light-gathering and heat-collecting power station.
In the operation process of the light-focusing and heat-collecting power station, the outlet temperature of the heat reservoir must be in a certain temperature range in the heat storage and heat collection process due to the limitation of the temperature requirements of the light-focusing and heat-collecting device and the power cycle module. However, because a certain temperature gradient exists in the packed bed heat reservoir, the outlet temperature of the heat reservoir is constantly changed in the heat storage and release process, and the utilization rate of the heat storage capacity of the packed bed heat reservoir is often low due to the limitation of the outlet temperature range. Therefore, improvements are needed for packed bed heat storage in a concentrated solar power plant to achieve a high efficiency, low cost thermal energy storage process.
Disclosure of Invention
The invention aims to provide a hybrid heat storage system for a photo-thermal power station and an operation method thereof, which can overcome the defect of low capacity utilization rate of a packed bed heat reservoir in a light-condensing heat-collecting power station, pertinently improve the heat storage capacity utilization rate of the packed bed heat reservoir, reduce the heat storage cost and realize the efficient and low-cost storage and release of solar heat energy.
In order to achieve the purpose, the system adopted by the invention comprises a light-gathering and heat-collecting system, a mixed heat storage system, a power work-doing system and a control system;
the light-gathering and heat-collecting system comprises a heat-collecting tower and heliostats which are arranged around the heat-collecting tower and used for heating working media in the heat-collecting tower;
the mixed heat storage system comprises a packed bed heat reservoir, a hot tank and a cold tank, wherein the upper port and the lower port of the packed bed heat reservoir are respectively communicated with a heat collection tower through pipelines with a first three-way valve and a second three-way valve which are connected with a control system to form a circulation loop, the hot tank is connected between the upper port of the packed bed heat reservoir and the first three-way valve through double pipelines, the cold tank is connected between the lower port of the packed bed heat reservoir and the second three-way valve through double pipelines, and temperature sensors connected with the control system are respectively arranged at the upper port and the lower port of the packed bed heat reservoir, at the outlets of the hot tank and the cold tank;
the power work system comprises a superheater, an evaporator and a preheater which are sequentially connected in series, wherein an inlet of the superheater is connected with a first three-way valve, an outlet of the superheater is connected with a second three-way valve, work working media pass through the preheater, the evaporator and the superheater and then are connected with an inlet of a high-pressure steam turbine, an output end of the high-pressure steam turbine is divided into two paths and respectively enters a deaerator and a low-pressure steam turbine, the high-pressure steam turbine and the low-pressure steam turbine are coaxially connected with a generator, and the work working media flow out of the low-pressure steam turbine and then sequentially flow through a condenser, a low-.
The inlet pipeline of the double pipelines of the hot tank is provided with a hot tank valve connected with the control system, and the outlet pipeline is provided with a hot tank liquid pump connected with the control system.
And a cold tank valve connected with the control system is arranged on an inlet pipeline of the double pipelines of the cold tank, and a cold tank liquid pump connected with the control system is arranged on an outlet pipeline.
And a heat collecting tower liquid pump is arranged on the heat collecting tower inlet pipeline.
The packed bed heat reservoir comprises a tank body, an external heat insulation layer and heat storage filler filled inside.
The heat storage filler is a sensible heat solid heat storage material or a phase change heat storage capsule for carrying out solid-liquid phase change heat storage.
The phase-change heat storage capsule comprises a phase-change heat storage material which is nitrate, chloride, carbonate, sulfate, fluoride or eutectic salt formed by the salts.
The tank body of the packed bed heat reservoir is cylindrical and is made of 316L or 310S stainless steel.
The hot tank and the cold tank are both of cylindrical structures with the same size, and the outside of the hot tank and the cold tank are wrapped by heat-insulating layers.
The mixed heat storage operation method for the photo-thermal power station comprises the following steps:
1) the heat storage process:
the control system distributes the flow of heat transfer fluid flowing through the packed bed heat reservoir, the hot tank and the cold tank through a first three-way valve, a hot tank valve and a cold tank valve according to the outlet temperature of the packed bed heat reservoir and the cold tank and based on the required outlet temperature of the heat storage system, the heat transfer fluid from the heat collecting tower enters the mixed heat storage system through the first three-way valve, enters the hot tank and the packed bed heat reservoir respectively after being regulated by the hot tank valve and a hot tank liquid pump, is mixed with the heat transfer fluid of the cold tank after flowing out of the packed bed heat reservoir, and then enters the heat collecting tower 7 through a second three-way valve for reheating to complete a heat storage cycle;
2) an exothermic process:
the control system distributes the flow of heat transfer fluid flowing through the packed bed heat reservoir, the hot tank and the cold tank through a second three-way valve, a cold tank valve and a hot tank valve according to the outlet temperature of the packed bed heat reservoir and the hot tank based on the required outlet temperature of the heat storage system, the heat transfer fluid from the power work system enters the mixed heat storage system through the second three-way valve, respectively enters the cold tank and the packed bed heat reservoir after being regulated by the cold tank valve and a cold tank liquid pump, the heat transfer fluid flows out of the packed bed heat reservoir and is mixed with the heat transfer fluid of the hot tank, then enters the power work system through the first three-way valve, respectively flows through a superheater, an evaporator and a preheater, and enters the mixed heat storage system again from the second three-way valve after being cooled to low temperature, and water in the power work system is heated to high-temperature steam through the preheater, and is heated in a high-pressure steam turbine and a low-pressure, and cooling by a condenser, and enabling the cooled gas to sequentially pass through a low-pressure pump, a deaerator and a high-pressure pump to enter the preheater again to complete a heat release cycle.
According to the invention, based on the control system, the flow of the heat transfer fluid flowing through the packed bed heat reservoir and the double-tank heat reservoir is adjusted by controlling the valve and the liquid pump according to the inlet and outlet temperatures of the packed bed heat reservoir, the outlet temperature of the hot tank and the outlet temperature of the cold tank, the outlet temperature of the mixed heat storage system is adjusted by mixing fluids with different temperatures, and the purposes of improving the capacity utilization rate of the mixed heat storage system and reducing the heat storage cost are achieved under the condition of meeting the outlet temperature limit.
The heat transfer fluid flow of the heat and cold tanks in the packed bed heat reservoir and the double-tank heat reservoir is mainly adjusted in the rotating speed of the liquid pump through the liquid pump, the valve and the control system according to the deviation between the temperature signal transmitted by the temperature sensor and the set temperature, so that the total flow of the heat storage system and the proportion of the flow between the hot tank and the cold tank in the packed bed heat reservoir and the double-tank heat reservoir are adjusted, the accurate control of the outlet temperature of the heat storage system is realized, and the capacity utilization rate of the packed bed heat reservoir is improved.
In summary, the invention has the advantages that:
1. the invention not only utilizes the advantage of low heat storage cost of the packed bed heat reservoir, but also utilizes the advantage of stable temperature of the double-tank heat reservoir, can realize low-cost and stable storage of solar heat energy, promotes the further reduction of the technical cost of photo-thermal power generation, and is beneficial to realizing continuous, high-efficiency and low-cost clean power generation of a light-gathering and heat-collecting power station;
2. the invention utilizes the advantages of constant heat storage and release temperature and easy control of the hot tank and the cold tank in the double-tank heat reservoir, and aims at the characteristic that the outlet temperature of the packed bed heat reservoir changes along with the time, the fluctuation of the outlet temperature of the heat storage system is reduced by adopting a fluid mixing method through the control system, the capacity utilization rate of the packed bed heat reservoir is improved, and the purpose of constant heat storage and release outlet temperature of the heat storage system is achieved;
3. according to the invention, the outlet temperature of the heat reservoir of the packed bed and the outlet temperature of the double-tank heat reservoir are read in real time, the rotating speed of each liquid pump is adjusted according to the required heat storage or heat release temperature and total flow, the flow of the heat transfer fluid of the heat reservoir of the packed bed and the double-tank heat reservoir is adjusted, and the accurate control of the outlet fluid temperature and flow of the mixed heat storage system can be realized by mixing the fluids at the outlets of the heat reservoir of the packed bed, the cold tank and the hot tank;
4. the invention can flexibly adjust the flow passing through the single-tank heat reservoir and the double-tank heat reservoir, meets the requirements of different outlet temperatures of the heat storage system and greatly widens the application range of the heat storage system;
5. the system is flexible in size and arrangement, and different sizes of the packed bed heat reservoir, different types of fillers and different sizes of the double-tank heat reservoir can be selected according to the size of the required heat storage amount;
6. the invention has wide application range and can be applied to the field of medium and high temperature heat energy utilization with any limitation on the outlet temperature of the heat storage system.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the invention includes a light-gathering and heat-collecting system, a hybrid heat storage system, a power work system and a control system 16;
the light-gathering and heat-collecting system comprises a heat-collecting tower 7 and heliostats 8 which are arranged around the heat-collecting tower 7 and used for heating working media in the heat-collecting tower;
the mixed heat storage system comprises a packed bed heat reservoir 1, a hot tank 9 and a cold tank 5, wherein the upper and lower ports of the packed bed heat reservoir 1 are respectively communicated with a heat collection tower 7 through pipelines with a first three-way valve 12 and a second three-way valve 2 which are connected with a control system 16 to form a circulation loop, the inlet pipeline of the heat collection tower 7 is provided with a heat collection tower liquid pump 6, the upper port of the packed bed heat reservoir 1 is connected with the hot tank 9 through a double pipeline between the first three-way valve 12 and the lower port of the packed bed heat reservoir 1, the inlet pipeline of the double pipeline of the hot tank 9 is provided with a hot tank valve 10 connected with the control system 16, the outlet pipeline is provided with a hot tank liquid pump 11 connected with the control system 16, the lower port of the packed bed heat reservoir 1 is connected with the cold tank 5 through a double pipeline between the second three-way valve 2, the inlet pipeline of the double pipeline of the cold tank 5 is provided with a cold tank valve 4 connected with the control system 16, the cold, temperature sensors connected with a control system 16 are respectively arranged at the upper and lower ports of the packed bed heat reservoir 1 and the outlets of the hot tank 9 and the cold tank 5;
the power work system comprises a superheater 13, an evaporator 14 and a preheater 22 which are connected in series in sequence, wherein an inlet of the superheater is connected with a first three-way valve 12, an outlet of the superheater is connected with a second three-way valve 2, work working media pass through the preheater 22, the evaporator 14 and the superheater 13 and then are connected with an inlet of a high-pressure steam turbine 15, an output end of the high-pressure steam turbine 15 is divided into two paths and respectively enter a deaerator 20 and a low-pressure steam turbine 23, the high-pressure steam turbine 15 and the low-pressure steam turbine 23 are coaxially connected with a generator 17, and the work working media flow out of the low-pressure steam turbine 23 and then sequentially pass through a condenser 18, a low-pressure pump 19, the.
The tank body of the packed bed heat reservoir 1 is cylindrical and is made of 316L or 310S stainless steel, the packed bed heat reservoir 1 comprises the tank body, an external heat insulation layer and heat storage filler filled inside, the heat storage filler is sensible heat solid heat storage material or phase change heat storage capsules for carrying out solid-liquid phase change heat storage, and the phase change heat storage material contained in the phase change heat storage capsules is nitrate, chloride, carbonate, sulfate, fluoride or eutectic salt formed by any of the above salts. The hot tank 9 and the cold tank 5 are both in a cylindrical structure with the same size, and the outside of the hot tank and the cold tank are wrapped by heat-insulating layers.
The mixed heat storage operation method for the photo-thermal power station comprises the following steps:
1) the heat storage process:
the control system 16 distributes the flow of heat transfer fluid flowing through the packed bed heat reservoir 1, the hot tank 9 and the cold tank 5 through a first three-way valve 12, a hot tank valve 10 and a cold tank valve 4 according to the outlet temperature of the packed bed heat reservoir 1 and the cold tank 5 and based on the required outlet temperature of the heat storage system, the heat transfer fluid from the heat collection tower 7 enters the mixed heat storage system through the first three-way valve 12, enters the hot tank 9 and the packed bed heat reservoir 1 respectively after being regulated by the hot tank valve 10 and the hot tank liquid pump 11, the heat transfer fluid flows out of the packed bed heat reservoir 1 and is mixed with the heat transfer fluid of the cold tank 5, and then enters the heat collection tower 7 through a second three-way valve 2 to be heated again, and a heat storage cycle is completed;
2) an exothermic process:
the control system 16 distributes the flow of the heat transfer fluid flowing through the packed bed heat reservoir 1, the hot tank 9 and the cold tank 5 through the second three-way valve 2, the cold tank valve 4 and the hot tank valve 10 according to the outlet temperature of the packed bed heat reservoir 1 and the hot tank 9 based on the required outlet temperature of the heat storage system, the heat transfer fluid from the power work system enters the hybrid heat storage system through the second three-way valve 2, enters the cold tank 5 and the packed bed heat reservoir 1 respectively after being regulated by the cold tank valve 4 and the cold tank liquid pump 3, the heat transfer fluid flows out of the packed bed heat reservoir 1 and is mixed with the heat transfer fluid of the hot tank 9, then enters the power work system through the first three-way valve 12, flows through the superheater 13, the evaporator 14 and the preheater 22 respectively, and enters the hybrid heat storage system again from the second three-way valve 2 after being cooled to a low temperature, and the water in the power work system passes through the preheater, The evaporator 14 and the superheater 13 are heated to high-temperature steam, work is done in the high-pressure steam turbine 15 and the high-pressure steam turbine 23, the high-temperature steam is cooled by the condenser 18, and the high-temperature steam enters the preheater 22 again through the low-pressure pump 19, the deaerator 20 and the high-pressure pump 21 in sequence to complete a heat release cycle.
Claims (10)
1. A mix heat-retaining system for light and heat power station which characterized in that: comprises a light-gathering and heat-collecting system, a mixed heat storage system, a power work system and a control system (16);
the light-gathering and heat-collecting system comprises a heat-collecting tower (7) and heliostats (8) which are arranged around the heat-collecting tower (7) and used for heating working media in the heat-collecting tower;
the mixed heat storage system comprises a packed bed heat reservoir (1), a hot tank (9) and a cold tank (5), wherein the upper port and the lower port of the packed bed heat reservoir (1) are respectively communicated with a heat collecting tower (7) through pipelines with a first three-way valve (12) and a second three-way valve (2) which are connected with a control system (16) to form a circulation loop, the hot tank (9) is connected between the upper port of the packed bed heat reservoir (1) and the first three-way valve (12) through double pipelines, the cold tank (5) is connected between the lower port of the packed bed heat reservoir (1) and the second three-way valve (2) through double pipelines, and temperature sensors connected with the control system (16) are respectively installed at the upper port and the lower port of the packed bed heat reservoir (1), and outlets of the hot tank (9) and the cold tank (5);
the power work system comprises a superheater (13), an evaporator (14) and a preheater (22), wherein the inlet of the superheater is connected with a first three-way valve (12), the outlet of the superheater is connected with a second three-way valve (2), work working media pass through the preheater (22), the evaporator (14) and the superheater (13) and then are connected with the inlet of a high-pressure steam turbine (15), the output end of the high-pressure steam turbine (15) is divided into two paths and respectively enter a deaerator (20) and a low-pressure steam turbine (23), the high-pressure steam turbine (15) and the low-pressure steam turbine (23) are coaxially connected with a generator (17), and the work working media flow out of the low-pressure steam turbine (23) and then sequentially flow through a condenser (18), a low-pressure pump (19), the deaerator (20) and the high-pressure pump (.
2. The hybrid thermal storage system for a photothermal power station of claim 1 wherein: the inlet pipeline of the double pipelines of the hot tank (9) is provided with a hot tank valve (10) connected with a control system (16), and the outlet pipeline is provided with a hot tank liquid pump (11) connected with the control system (16).
3. The hybrid thermal storage system for a photothermal power station of claim 1 wherein: and a cold tank valve (4) connected with a control system (16) is arranged on an inlet pipeline of the double pipelines of the cold tank (5), and a cold tank liquid pump (3) connected with the control system (16) is arranged on an outlet pipeline.
4. The hybrid thermal storage system for a photothermal power station of claim 1 wherein: and a heat collecting tower liquid pump (6) is arranged on an inlet pipeline of the heat collecting tower (7).
5. The hybrid thermal storage system for a photothermal power station of claim 1 wherein: the packed bed heat reservoir (1) comprises a tank body, an external heat insulation layer and heat storage filler filled inside.
6. The hybrid thermal storage system for a photothermal power station of claim 5 wherein: the heat storage filler is a sensible heat solid heat storage material or a phase change heat storage capsule for carrying out solid-liquid phase change heat storage.
7. The hybrid thermal storage system for a photothermal power station of claim 6 wherein: the phase-change heat storage capsule comprises a phase-change heat storage material which is nitrate, chloride, carbonate, sulfate, fluoride or eutectic salt formed by the salts.
8. The hybrid thermal storage system for a photothermal power station of claim 1 wherein: the tank body of the packed bed heat reservoir (1) is cylindrical and is made of 316L or 310S stainless steel.
9. The hybrid thermal storage system for a photothermal power station of claim 1 wherein: the hot tank (9) and the cold tank (5) are both in cylindrical structures with the same size, and the outsides of the hot tank and the cold tank are wrapped with heat-insulating layers.
10. A method of operation of a hybrid thermal storage system for a photothermal power plant according to the system of claim 1, wherein:
1) the heat storage process:
the control system (16) distributes the flow of heat transfer fluid flowing through the packed bed heat reservoir (1), the hot tank (9) and the cold tank (5) through a first three-way valve (12), a hot tank valve (10) and a cold tank valve (4) according to the outlet temperature of the packed bed heat reservoir (1) and the cold tank (5) based on the required outlet temperature of the heat storage system, the heat transfer fluid from the heat collection tower (7) enters the hybrid heat storage system through the first three-way valve (12), enters the hot tank (9) and the packed bed heat reservoir (1) respectively after being regulated by the hot tank valve (10) and the hot tank liquid pump (11), the heat transfer fluid flows out of the packed bed heat reservoir (1) and is mixed with the heat transfer fluid of the cold tank (5), and then enters the heat collection tower (7) through a second three-way valve (2) to be heated again, and a heat storage cycle is completed;
2) an exothermic process:
the control system (16) distributes the flow of heat transfer fluid flowing through the packed bed heat reservoir (1), the hot tank (9) and the cold tank (5) through a second three-way valve (2), a cold tank valve (4) and a hot tank valve (10) according to the outlet temperature of the packed bed heat reservoir (1) and the hot tank (9) based on the required outlet temperature of the heat storage system, the heat transfer fluid from the power work system enters the hybrid heat storage system through the second three-way valve (2), enters the cold tank (5) and the packed bed heat reservoir (1) respectively after being regulated by the cold tank valve (4) and the cold tank liquid pump (3), the heat transfer fluid flows out of the packed bed heat reservoir (1) and is mixed with the heat transfer fluid of the hot tank (9), then enters the power work system through a first three-way valve (12) and flows through a superheater (13), an evaporator (14) and a preheater (22) respectively, after the water is cooled to low temperature, the water enters the mixed heat storage system again from the second three-way valve (2), the water in the power work system is heated to high-temperature steam through a preheater (22), an evaporator (14) and a superheater (13), works in a high-pressure steam turbine (15) and a low-pressure steam turbine (23), is cooled through a condenser (18), and enters the preheater (22) again through a low-pressure pump (19), a deaerator (20) and a high-pressure pump (21) in sequence to complete a heat release cycle.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749862A (en) * | 2020-07-27 | 2020-10-09 | 西安热工研究院有限公司 | Mixed working fluid supercritical Brayton cycle photothermal power generation system and power generation method |
| CN113864748A (en) * | 2021-10-28 | 2021-12-31 | 上海锅炉厂有限公司 | A solar thermal gas supply system and gas supply method based on phase change heat storage |
| CN114924523A (en) * | 2022-05-23 | 2022-08-19 | 中节能国机联合电力(宁夏)有限公司 | Logic interlocking system and control method for photothermal heat storage mode |
| CN115371476A (en) * | 2022-08-25 | 2022-11-22 | 冯鹏辉 | Ultra-high temperature phase change heat storage system and stable heat release method |
| CN115574363A (en) * | 2022-10-11 | 2023-01-06 | 西安科技大学 | A solar-wind energy development and utilization system and method based on heat storage in coal mine goaf |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5417052A (en) * | 1993-11-05 | 1995-05-23 | Midwest Research Institute | Hybrid solar central receiver for combined cycle power plant |
| CN101876299A (en) * | 2010-05-24 | 2010-11-03 | 北京京仪仪器仪表研究总院有限公司 | Method and system for combing solar energy thermal power generation with biomass power generation |
| CN105649900A (en) * | 2016-03-10 | 2016-06-08 | 北京首航艾启威节能技术股份有限公司 | System for efficiently reducing auxiliary power of molten-salt tower type solar photo-thermal power generation station |
| CN106703908A (en) * | 2015-11-12 | 2017-05-24 | 国网智能电网研究院 | Rankine cycle system with phase change energy storage heat exchanger |
| CN107388607A (en) * | 2017-08-03 | 2017-11-24 | 苏州绿标新能源科技有限公司 | A kind of photovoltaic and photothermal hybrid power plant systems |
| CN109059318A (en) * | 2018-09-03 | 2018-12-21 | 中国科学院工程热物理研究所 | A kind of fountain packed bed heat reservoir and its operation method |
| CN110374813A (en) * | 2019-07-18 | 2019-10-25 | 青海格尔木鲁能新能源有限公司 | A kind of wind-powered electricity generation-photovoltaic-heat accumulation combined generating system |
-
2019
- 2019-12-18 CN CN201911305979.2A patent/CN110953735A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5417052A (en) * | 1993-11-05 | 1995-05-23 | Midwest Research Institute | Hybrid solar central receiver for combined cycle power plant |
| CN101876299A (en) * | 2010-05-24 | 2010-11-03 | 北京京仪仪器仪表研究总院有限公司 | Method and system for combing solar energy thermal power generation with biomass power generation |
| CN106703908A (en) * | 2015-11-12 | 2017-05-24 | 国网智能电网研究院 | Rankine cycle system with phase change energy storage heat exchanger |
| CN105649900A (en) * | 2016-03-10 | 2016-06-08 | 北京首航艾启威节能技术股份有限公司 | System for efficiently reducing auxiliary power of molten-salt tower type solar photo-thermal power generation station |
| CN107388607A (en) * | 2017-08-03 | 2017-11-24 | 苏州绿标新能源科技有限公司 | A kind of photovoltaic and photothermal hybrid power plant systems |
| CN109059318A (en) * | 2018-09-03 | 2018-12-21 | 中国科学院工程热物理研究所 | A kind of fountain packed bed heat reservoir and its operation method |
| CN110374813A (en) * | 2019-07-18 | 2019-10-25 | 青海格尔木鲁能新能源有限公司 | A kind of wind-powered electricity generation-photovoltaic-heat accumulation combined generating system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749862A (en) * | 2020-07-27 | 2020-10-09 | 西安热工研究院有限公司 | Mixed working fluid supercritical Brayton cycle photothermal power generation system and power generation method |
| CN113864748A (en) * | 2021-10-28 | 2021-12-31 | 上海锅炉厂有限公司 | A solar thermal gas supply system and gas supply method based on phase change heat storage |
| CN114924523A (en) * | 2022-05-23 | 2022-08-19 | 中节能国机联合电力(宁夏)有限公司 | Logic interlocking system and control method for photothermal heat storage mode |
| CN115371476A (en) * | 2022-08-25 | 2022-11-22 | 冯鹏辉 | Ultra-high temperature phase change heat storage system and stable heat release method |
| CN115574363A (en) * | 2022-10-11 | 2023-01-06 | 西安科技大学 | A solar-wind energy development and utilization system and method based on heat storage in coal mine goaf |
| CN115574363B (en) * | 2022-10-11 | 2023-09-19 | 西安科技大学 | A light-wind energy development and utilization system and method based on heat storage in coal mine goafs |
| CN117647130A (en) * | 2024-01-30 | 2024-03-05 | 河北建投国融能源服务有限公司 | Constant-inclination Wen Jieou cold energy storage and utilization device and method for liquid air energy storage system |
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