CN116608603A - Energy storage power generation and heat supply system coupling solar energy and geothermal energy - Google Patents
Energy storage power generation and heat supply system coupling solar energy and geothermal energy Download PDFInfo
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- CN116608603A CN116608603A CN202310494032.0A CN202310494032A CN116608603A CN 116608603 A CN116608603 A CN 116608603A CN 202310494032 A CN202310494032 A CN 202310494032A CN 116608603 A CN116608603 A CN 116608603A
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- 238000010248 power generation Methods 0.000 title claims abstract description 38
- 238000004146 energy storage Methods 0.000 title claims abstract description 21
- 230000008878 coupling Effects 0.000 title claims 7
- 238000010168 coupling process Methods 0.000 title claims 7
- 238000005859 coupling reaction Methods 0.000 title claims 7
- 150000003839 salts Chemical class 0.000 claims abstract description 72
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 19
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 239000005435 mesosphere Substances 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 24
- 229910052799 carbon Inorganic materials 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000005514 two-phase flow Effects 0.000 abstract description 6
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- OOYGSFOGFJDDHP-KMCOLRRFSA-N kanamycin A sulfate Chemical group OS(O)(=O)=O.O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CN)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O[C@@H]2[C@@H]([C@@H](N)[C@H](O)[C@@H](CO)O2)O)[C@H](N)C[C@@H]1N OOYGSFOGFJDDHP-KMCOLRRFSA-N 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000011555 saturated liquid Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
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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
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- 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
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/103—Carbon dioxide
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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
- F03G4/00—Devices for producing mechanical power from geothermal energy
- F03G4/063—Devices for producing mechanical power from geothermal energy with energy storage devices
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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
- F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
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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
- F03G6/071—Devices for producing mechanical power from solar energy with energy storage devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
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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
- 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
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
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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
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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
- F28D2020/0047—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 using molten salts or liquid metals
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
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- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
本发明公开了一种耦合太阳能和地热能的储能发电供热系统,压缩机的出口与高压冷却器的放热侧入口相连通,高压冷却器的放热侧的出口与地热田内高温层管道的入口相连通,地热田内高温层管道的出口与二氧化碳‑熔盐换热器的吸热侧入口相连通,二氧化碳‑熔盐换热器的吸热侧出口与膨胀机的入口相连通,膨胀机的出口与低压冷却器的放热侧入口相连通,低压冷却器的放热侧出口与压缩机的入口相连通;供热系统与高压冷却器的吸热侧、低压冷却器的吸热侧及地热田内的中温层管道相连接,太阳能光热系统与二氧化碳‑熔盐换热器的放热侧相连通,该系统的发电效率较高,且换热器内的气液两相流动较为稳定。
The invention discloses an energy storage power generation heating system coupled with solar energy and geothermal energy. The outlet of the compressor is connected with the inlet of the heat release side of the high pressure cooler, and the outlet of the heat release side of the high pressure cooler is connected with the high temperature layer pipeline in the geothermal field. The inlet of the high-temperature layer pipe in the geothermal field is connected with the inlet of the endothermic side of the carbon dioxide molten salt heat exchanger, and the outlet of the endothermic side of the carbon dioxide molten salt heat exchanger is connected with the inlet of the expander, and the expander The outlet of the low pressure cooler is connected to the inlet of the heat release side, and the outlet of the heat release side of the low pressure cooler is connected to the inlet of the compressor; the heat supply system is connected to the heat absorption side of the high pressure cooler, the heat absorption side of the low pressure cooler and The mesosphere pipes in the geothermal field are connected, and the solar thermal system is connected with the heat release side of the carbon dioxide molten salt heat exchanger. The power generation efficiency of this system is high, and the gas-liquid two-phase flow in the heat exchanger is relatively stable.
Description
技术领域technical field
本发明属于储能技术领域,涉及一种耦合太阳能和地热能的储能发电供热系统。The invention belongs to the technical field of energy storage, and relates to an energy storage power generation and heat supply system coupled with solar energy and geothermal energy.
背景技术Background technique
为了化解间歇性新能源并入电网的后的电力波动问题,丰富储能技术并发展高效发电技术是必然趋势。压缩气体储能技术具有规模大、安全性好、寿命长、对环境友好的特点。气体工质可采用空气、二氧化碳等。相比于空气而言,二氧化碳性质稳定、价格便宜、来源广泛、常温即可液化,在降碳、工质存储方面有明显优势。采用二氧化碳为工质的卡诺电池既可压缩工质储能,又可膨胀工质发电,能够同时实现机械能和热能之间的相互转换,逐步成为最具潜力的新兴储能发电技术之一。In order to resolve the power fluctuation problem after intermittent new energy is integrated into the grid, it is an inevitable trend to enrich energy storage technology and develop efficient power generation technology. Compressed gas energy storage technology has the characteristics of large scale, good safety, long life and environmental friendliness. Gas working medium can adopt air, carbon dioxide and so on. Compared with air, carbon dioxide is stable in nature, cheap in price, wide in sources, and can be liquefied at room temperature. It has obvious advantages in carbon reduction and working fluid storage. The Carnot battery using carbon dioxide as the working medium can not only compress the working medium for energy storage, but also expand the working medium for power generation. It can realize the mutual conversion between mechanical energy and thermal energy at the same time, and has gradually become one of the most potential emerging energy storage and power generation technologies.
专利CN 113659728 A提供了一种实现电力大规模存储的卡诺电池。然而该系统在发电时膨胀机入口的最高温度为储冷过程中压缩机出口的温度,无法实现较高的发电效率。专利CN 114033518 A利用太阳能结合卡诺电池进行冷-热-电-水联供。然而该系统在发电过程中直接利用换热器将饱和液体转变为高温高压气体,换热器内的气液两相流动不稳定容易造成设备损坏。Patent CN 113659728 A provides a Carnot battery for large-scale storage of electric power. However, the maximum temperature at the inlet of the expander is the temperature at the outlet of the compressor during the cold storage process in this system during power generation, which cannot achieve high power generation efficiency. Patent CN 114033518 A utilizes solar energy combined with Carnot batteries for combined cold-heat-electricity-water supply. However, in the process of power generation, the system directly uses the heat exchanger to convert the saturated liquid into high-temperature and high-pressure gas. The unstable gas-liquid two-phase flow in the heat exchanger is likely to cause equipment damage.
发明内容Contents of the invention
本发明的目的在于克服上述现有技术的缺点,提供了一种耦合太阳能和地热能的储能发电供热系统,该系统的发电效率较高,且换热器内的气液两相流动较为稳定。The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and to provide an energy storage power generation heating system coupled with solar energy and geothermal energy. The power generation efficiency of the system is high, and the gas-liquid two-phase flow in the heat exchanger Stablize.
为达到上述目的,本发明所述的耦合太阳能和地热能的储能发电供热系统包括太阳能光热系统、供热系统及卡诺电池储冷发电系统,其中,卡诺电池储冷发电系统包括压缩机、高压冷却器、地热田、二氧化碳-熔盐换热器、膨胀机及低压冷却器;In order to achieve the above purpose, the energy storage power generation heating system coupled with solar energy and geothermal energy according to the present invention includes a solar thermal system, a heating system and a Carnot battery cold storage power generation system, wherein the Carnot battery cold storage power generation system includes Compressors, high-pressure coolers, geothermal fields, carbon dioxide-molten salt heat exchangers, expanders and low-pressure coolers;
压缩机的出口与高压冷却器的放热侧入口相连通,高压冷却器的放热侧出口与地热田内高温层管道的入口相连通,地热田内高温层管道的出口与二氧化碳-熔盐换热器的吸热侧入口相连通,二氧化碳-熔盐换热器的吸热侧出口与膨胀机的入口相连通,膨胀机的出口与低压冷却器的放热侧入口相连通,低压冷却器的放热侧出口与压缩机的入口相连通;The outlet of the compressor is connected with the inlet of the heat releasing side of the high pressure cooler, the outlet of the heat releasing side of the high pressure cooler is connected with the inlet of the high temperature layer pipeline in the geothermal field, and the outlet of the high temperature layer pipeline in the geothermal field is connected with the carbon dioxide-molten salt heat exchanger The inlet on the endothermic side of the carbon dioxide-molten salt heat exchanger is connected to the inlet of the expander, the outlet of the expander is connected to the inlet on the exothermic side of the low-pressure cooler, and the exothermic side of the low-pressure cooler The side outlet is connected with the inlet of the compressor;
供热系统与高压冷却器的管侧、低压冷却器的放热侧及地热田中的中温层管道相连接,太阳能光热系统与二氧化碳-熔盐换热器放热侧相连通。The heating system is connected to the tube side of the high-pressure cooler, the heat release side of the low-pressure cooler, and the mesosphere pipeline in the geothermal field, and the solar thermal system is connected to the heat release side of the carbon dioxide-molten salt heat exchanger.
低压冷却器的放热侧出口经柔性气仓与压缩机的入口相连通。The outlet of the heat release side of the low-pressure cooler communicates with the inlet of the compressor through a flexible gas chamber.
高压冷却器的放热侧出口经液体储罐与地热田内高温层管道的入口相连通。The heat release side outlet of the high pressure cooler communicates with the inlet of the high temperature layer pipeline in the geothermal field through the liquid storage tank.
压缩机连接有电机;膨胀机连接有发电机。The compressor is connected with a motor; the expander is connected with a generator.
供热系统包括低温用户端及冷却泵;The heating system includes low-temperature user end and cooling pump;
低温用户端的出口经冷却泵后分为两路,其中一路经高压冷却器的吸热侧与低温用户端的入口相连通,另一路经低压冷却器的吸热侧与低温用户端的入口相连通。The outlet of the low-temperature user is divided into two paths after passing through the cooling pump, one of which is connected to the inlet of the low-temperature user through the heat-absorbing side of the high-pressure cooler, and the other is connected to the inlet of the low-temperature user through the heat-absorbing side of the low-pressure cooler.
供热系统包括高温用户端、循环泵及换热器;The heating system includes high temperature user end, circulation pump and heat exchanger;
地热田内中温层管道的出口依次经换热器的吸热侧、高温用户端及循环泵与地热田内中温层管道的入口相连通。The outlet of the mesolayer pipeline in the geothermal field is connected with the inlet of the mesolayer pipeline in the geothermal field through the heat absorbing side of the heat exchanger, the high-temperature user end and the circulating pump in sequence.
所述太阳能光热系统包括太阳能集热器、高温熔盐罐及低温熔盐罐;The solar photothermal system includes a solar collector, a high-temperature molten salt tank and a low-temperature molten salt tank;
高温熔盐罐的出口分为两路,其中一路经换热器的放热侧与低温熔盐罐的入口相连通,另一路经二氧化碳-熔盐换热器的放热侧与低温熔盐罐的入口相连通,低温熔盐罐的出口与太阳能集热器的入口相连通,太阳能集热器的出口与高温熔盐罐的入口相连通。The outlet of the high-temperature molten salt tank is divided into two paths, one of which is connected to the inlet of the low-temperature molten salt tank through the heat release side of the heat exchanger, and the other is connected to the low-temperature molten salt tank through the heat release side of the carbon dioxide-molten salt heat exchanger. The inlet of the low-temperature molten salt tank is connected, the outlet of the low-temperature molten salt tank is connected with the inlet of the solar collector, and the outlet of the solar collector is connected with the inlet of the high-temperature molten salt tank.
低温熔盐罐的出口经熔盐泵与太阳能集热器的入口相连通。The outlet of the low temperature molten salt tank is connected with the inlet of the solar heat collector through the molten salt pump.
还包括定日镜,太阳光经定日镜反射后照射到太阳能集热器上。It also includes a heliostat, and the sunlight is reflected by the heliostat and then irradiated onto the solar collector.
本发明具有以下有益效果:The present invention has the following beneficial effects:
本发明所述的耦合太阳能和地热能的储能发电供热系统在具体操作时,通过在二氧化碳-熔盐换热器前布置地热田内高温层通道,实现二氧化碳液态到气态的转变,避免气液两相流动不稳定导致的换热器损坏问题,换热器内的气液两相流动较为稳定。此外,在膨胀机入口前布置地热田内高温层通道及二氧化碳-熔盐换热器,通过对太阳能和地热能在卡诺电池发电系统中的梯级利用,实现高效发电,发电效率较高。In the specific operation of the energy storage power generation and heat supply system coupled with solar energy and geothermal energy according to the present invention, by arranging the high-temperature layer channel in the geothermal field in front of the carbon dioxide-molten salt heat exchanger, the transformation of carbon dioxide from liquid state to gaseous state is realized, and gas-liquid is avoided. The problem of damage to the heat exchanger caused by unstable two-phase flow, the gas-liquid two-phase flow in the heat exchanger is relatively stable. In addition, the high-temperature layer channel in the geothermal field and the carbon dioxide-molten salt heat exchanger are arranged before the inlet of the expander. Through the cascade utilization of solar energy and geothermal energy in the Carnot battery power generation system, efficient power generation is achieved with high power generation efficiency.
附图说明Description of drawings
图1为本发明的系统结构图。Fig. 1 is a system structure diagram of the present invention.
其中,1-1为柔性气仓、1-2为压缩机、1-3为高压冷却器、1-4为液体储罐、1-5为地热田、1-6为二氧化碳-熔盐换热器、1-7为膨胀机、1-8为低压冷却器、1-9为电机、1-10为发电机、2-1为定日镜、2-2为太阳能集热器、2-3为高温熔盐罐、2-4为低温熔盐罐、2-5为熔盐泵、3-1为高温用户端、3-2为循环泵、3-3为换热器、3-4为低温用户端、3-5为冷却泵。Among them, 1-1 is a flexible gas tank, 1-2 is a compressor, 1-3 is a high-pressure cooler, 1-4 is a liquid storage tank, 1-5 is a geothermal field, and 1-6 is carbon dioxide-molten salt heat exchange 1-7 is the expander, 1-8 is the low-pressure cooler, 1-9 is the motor, 1-10 is the generator, 2-1 is the heliostat, 2-2 is the solar collector, 2-3 2-4 is a low-temperature molten salt tank, 2-5 is a molten salt pump, 3-1 is a high-temperature user end, 3-2 is a circulating pump, 3-3 is a heat exchanger, and 3-4 is a Low temperature user end, 3-5 are cooling pumps.
具体实施方式Detailed ways
为了使本技术领域的人员更好地理解本发明方案,下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分的实施例,不是全部的实施例,而并非要限制本发明公开的范围。此外,在以下说明中,省略了对公知结构和技术的描述,以避免不必要的混淆本发明公开的概念。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都应当属于本发明保护的范围。In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only The embodiments are a part of the present invention, not all embodiments, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts disclosed in the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
在附图中示出了根据本发明公开实施例的结构示意图。这些图并非是按比例绘制的,其中为了清楚表达的目的,放大了某些细节,并且可能省略了某些细节。图中所示出的各种区域、层的形状及它们之间的相对大小、位置关系仅是示例性的,实际中可能由于制造公差或技术限制而有所偏差,并且本领域技术人员根据实际所需可以另外设计具有不同形状、大小、相对位置的区域/层。The schematic diagrams of the structures according to the disclosed embodiments of the present invention are shown in the accompanying drawings. The figures are not drawn to scale, with certain details exaggerated and possibly omitted for clarity of presentation. The shapes of various regions and layers shown in the figure and their relative sizes and positional relationships are only exemplary, and may deviate due to manufacturing tolerances or technical limitations in practice, and those skilled in the art will Regions/layers with different shapes, sizes, and relative positions can be additionally designed as needed.
参考图1,本发明所述的耦合太阳能和地热能的储能发电供热系统包括卡诺电池储冷发电系统、太阳能光热系统及供热系统;太阳能光热系统与卡诺电池储冷发电系统及供热系统相连接,卡诺电池储冷发电系统与供热系统相连接。Referring to Fig. 1, the energy storage power generation heating system coupled with solar energy and geothermal energy according to the present invention includes a Carnot battery cold storage power generation system, a solar photothermal system and a heating system; a solar photothermal system and a Carnot battery cold storage power generation system The system is connected with the heating system, and the Kano battery cold storage power generation system is connected with the heating system.
所述太阳能光热系统包括定日镜2-1、太阳能集热器2-2、高温熔盐罐2-3、低温熔盐罐2-4及熔盐泵2-5;供热系统包括高温用户端3-1、循环泵3-2、换热器3-3、低温用户端3-4及冷却泵3-5;卡诺电池储冷发电系统包括柔性气仓1-1、压缩机1-2、高压冷却器1-3、液体储罐1-4、地热田1-5、二氧化碳-熔盐换热器1-6、膨胀机1-7、低压冷却器1-8、电机1-9及发电机1-10。The solar photothermal system includes a heliostat 2-1, a solar collector 2-2, a high temperature molten salt tank 2-3, a low temperature molten salt tank 2-4 and a molten salt pump 2-5; the heating system includes a high temperature User terminal 3-1, circulation pump 3-2, heat exchanger 3-3, low temperature user terminal 3-4 and cooling pump 3-5; Carnot battery cold storage power generation system includes flexible gas storage 1-1, compressor 1 -2. High pressure cooler 1-3, liquid storage tank 1-4, geothermal field 1-5, carbon dioxide-molten salt heat exchanger 1-6, expander 1-7, low pressure cooler 1-8, motor 1- 9 and generators 1-10.
压缩机1-2的出口与高压冷却器1-3的放热侧入口相连通,高压冷却器1-3的放热侧出口与液体储罐1-4的入口相连通,液体储罐1-4的出口与地热田1-5内高温层管道的入口相连通,地热田1-5内高温层管道的出口与二氧化碳-熔盐换热器1-6的吸热侧入口相连通,二氧化碳-熔盐换热器1-6的吸热侧出口与膨胀机1-7的入口相连通,膨胀机1-7的出口与低压冷却器1-8的放热侧入口相连通,低压冷却器1-8的放热侧出口与柔性气仓1-1的入口相连通,柔性气仓1-1的出口与压缩机1-2的入口相连通;压缩机1-2与电机1-9相连接,膨胀机1-7与发电机1-10相连接。The outlet of the compressor 1-2 is connected with the inlet of the heat releasing side of the high pressure cooler 1-3, the outlet of the heat releasing side of the high pressure cooler 1-3 is connected with the inlet of the liquid storage tank 1-4, and the liquid storage tank 1- The outlet of 4 is connected with the inlet of the high-temperature layer pipeline in the geothermal field 1-5, and the outlet of the high-temperature layer pipeline in the geothermal field 1-5 is connected with the heat-absorbing side inlet of the carbon dioxide-molten salt heat exchanger 1-6, and the carbon dioxide- The heat-absorbing side outlet of the molten salt heat exchanger 1-6 is connected to the inlet of the expander 1-7, and the outlet of the expander 1-7 is connected to the heat-releasing side inlet of the low-pressure cooler 1-8, and the low-pressure cooler 1-8 The outlet of the heat release side of -8 is connected with the inlet of the flexible gas chamber 1-1, and the outlet of the flexible gas chamber 1-1 is connected with the inlet of the compressor 1-2; the compressor 1-2 is connected with the motor 1-9 , the expander 1-7 is connected with the generator 1-10.
低温用户端3-4的出口经冷却泵3-5后分为两路,其中一路经高压冷却器1-3的吸热侧与低温用户端3-4的入口相连通,另一路经低压冷却器1-8的吸热侧与低温用户端3-4的入口相连通。The outlet of the low-temperature user end 3-4 is divided into two paths after passing through the cooling pump 3-5, one of which is connected to the inlet of the low-temperature user end 3-4 through the heat-absorbing side of the high-pressure cooler 1-3, and the other path is passed through the low-pressure cooling The heat absorbing side of the device 1-8 communicates with the inlet of the low-temperature user end 3-4.
地热田1-5内中温层管道的出口依次经换热器3-3的吸热侧、高温用户端3-1及循环泵3-2与地热田1-5内中温层管道的入口相连通。The outlet of the mesotherm pipeline in the geothermal field 1-5 is connected to the inlet of the mesosphere pipeline in the geothermal field 1-5 through the heat-absorbing side of the heat exchanger 3-3, the high-temperature user end 3-1 and the circulating pump 3-2 in sequence .
高温熔盐罐2-3的出口分为两路,其中一路经换热器3-3的放热侧与低温熔盐罐2-4的入口相连通,另一路经二氧化碳-熔盐换热器1-6的放热侧与低温熔盐罐2-4的入口相连通,低温熔盐罐2-4的出口经熔盐泵2-5与太阳能集热器2-2的入口相连通,太阳能集热器2-2的出口与高温熔盐罐2-3的入口相连通。The outlet of the high-temperature molten salt tank 2-3 is divided into two paths, one of which is connected to the inlet of the low-temperature molten salt tank 2-4 through the heat release side of the heat exchanger 3-3, and the other through the carbon dioxide-molten salt heat exchanger The heat releasing side of 1-6 is connected with the inlet of low-temperature molten salt tank 2-4, and the outlet of low-temperature molten salt tank 2-4 is connected with the inlet of solar heat collector 2-2 through molten salt pump 2-5, and the solar energy The outlet of the heat collector 2-2 communicates with the inlet of the high-temperature molten salt tank 2-3.
所述供热系统中的工质为水、导热油、制冷剂;所述卡诺电池储冷发电系统中的工质可替换为其他有机工质;所述卡诺电池储冷过程中的电机1-9由可再生能源供电,例如风电及光伏等。The working medium in the heating system is water, heat transfer oil, and refrigerant; the working medium in the Carnot battery cold storage power generation system can be replaced by other organic working medium; the motor in the Carnot battery cold storage process 1-9 are powered by renewable energy, such as wind power and photovoltaics.
本发明的具体工作过程为:Concrete work process of the present invention is:
卡诺电池储冷时,电机1-9带动压缩机1-2运转,压缩并加热来自柔性气仓1-1的低温低压二氧化碳,受热增压后形成的高温高压二氧化碳进入高压冷却器1-3的放热侧中向低温供热系统放热,放热后形成的低温高压二氧化碳进入液体储罐1-4中储冷。卡诺电池储冷过程中耦合低温供热系统,将高压冷却器1-3放热侧二氧化碳的热能转化为高压冷却器1-3吸热侧中工质的热能。When the Kano battery is cold storage, the motor 1-9 drives the compressor 1-2 to run, compresses and heats the low-temperature and low-pressure carbon dioxide from the flexible gas chamber 1-1, and the high-temperature and high-pressure carbon dioxide formed after being heated and pressurized enters the high-pressure cooler 1-3 The heat release side of the heat release side releases heat to the low temperature heating system, and the low temperature and high pressure carbon dioxide formed after the heat release enters the liquid storage tank 1-4 for cold storage. The low-temperature heating system is coupled in the cold storage process of the Carnot battery, and the heat energy of the carbon dioxide on the exothermic side of the high-pressure cooler 1-3 is converted into the heat energy of the working medium on the heat-absorbing side of the high-pressure cooler 1-3.
卡诺电池发电时,液体储罐1-4中的低温高压二氧化碳进入地热田1-5内高温层通道和二氧化碳-熔盐换热器1-6吸热侧吸热后形成高温高压二氧化碳,随后进入膨胀机1-7中膨胀放热为中温低压二氧化碳,同时膨胀机1-7带动发电机1-10转动发电,随后中温低压二氧化碳进入低压冷却器1-8放热侧中放热形成低温低压二氧化碳,最后进入柔性气仓1-1中存储。卡诺电池发电过程中耦合太阳能光热系统,将二氧化碳-熔盐换热器1-6放热侧中熔盐的热能转化为二氧化碳-熔盐换热器1-6吸热侧中二氧化碳的热能。When the Carnot battery generates power, the low-temperature and high-pressure carbon dioxide in the liquid storage tank 1-4 enters the high-temperature layer channel in the geothermal field 1-5 and the heat-absorbing side of the carbon dioxide-molten salt heat exchanger 1-6 absorbs heat to form high-temperature and high-pressure carbon dioxide, and then Entering the expander 1-7, the expansion heat releases into medium-temperature and low-pressure carbon dioxide, and at the same time, the expander 1-7 drives the generator 1-10 to rotate and generate electricity, and then the medium-temperature and low-pressure carbon dioxide enters the heat release side of the low-pressure cooler 1-8 to release heat to form a low-temperature and low pressure Carbon dioxide finally enters the flexible gas chamber 1-1 for storage. The solar thermal system is coupled during the power generation process of the Carnot battery, and the thermal energy of the molten salt in the heat release side of the carbon dioxide-molten salt heat exchanger 1-6 is converted into the heat energy of carbon dioxide in the heat absorption side of the carbon dioxide-molten salt heat exchanger 1-6 .
太阳能光热系统储热时,低温熔盐罐2-4中的低温熔盐通过熔盐泵2-5泵送至太阳能集热器2-2中,定日镜2-1将阳光聚焦到太阳能集热器2-2上将光能转化为热能加热低温熔盐至高温熔盐,随后高温熔盐进入高温熔盐罐2-3中储热。When the solar thermal system is storing heat, the low-temperature molten salt in the low-temperature molten salt tank 2-4 is pumped to the solar collector 2-2 through the molten salt pump 2-5, and the heliostat 2-1 focuses the sunlight onto the solar energy. The heat collector 2-2 converts light energy into heat energy to heat the low-temperature molten salt to high-temperature molten salt, and then the high-temperature molten salt enters the high-temperature molten salt tank 2-3 for heat storage.
太阳能光热系统放热时,高温熔盐罐2-3中的一部分高温熔盐进入二氧化碳-熔盐换热器1-6的放热侧中向二氧化碳-熔盐换热器1-6吸热侧放热变成低温熔盐,另一部分高温熔盐进入换热器3-3的放热侧中向换热器3-3吸热侧放热变成低温熔盐,随后两者汇合后进入低温熔盐罐2-4中存储。When the solar thermal system releases heat, a part of the high-temperature molten salt in the high-temperature molten salt tank 2-3 enters the heat release side of the carbon dioxide-molten salt heat exchanger 1-6 to absorb heat to the carbon dioxide-molten salt heat exchanger 1-6 The side releases heat to become low-temperature molten salt, and another part of high-temperature molten salt enters the heat release side of heat exchanger 3-3 to release heat to the heat absorption side of heat exchanger 3-3 to become low-temperature molten salt, and then the two merge and enter Store in low temperature molten salt tanks 2-4.
高温供热系统供热时,高温用户端3-1放热侧的低温工质通过循环泵3-2加压后,依次通过地热田1-5内中温层通道及换热器3-3吸热侧吸热,最后进入高温用户端3-1的放热侧中放热。高温供热系统耦合太阳能光热系统,将换热器3-3放热侧熔盐的热能转化为换热器3-3吸热侧工质的热能。When the high-temperature heating system supplies heat, the low-temperature working fluid on the heat release side of the high-temperature user end 3-1 is pressurized by the circulation pump 3-2, and then sequentially passes through the mesolayer channel in the geothermal field 1-5 and the heat exchanger 3-3 to absorb The hot side absorbs heat, and finally enters the heat releasing side of the high-temperature user end 3-1 to release heat. The high-temperature heating system is coupled with the solar photothermal system, and converts the thermal energy of the molten salt on the exothermic side of the heat exchanger 3-3 into the thermal energy of the working fluid on the endothermic side of the heat exchanger 3-3.
低温供热系统供热时,低温用户端3-4吸热侧的低温工质通过冷却泵3-5加压后,一部分通过高压冷却器1-3吸热侧吸热成为高温工质,另一部分通过低压冷却器1-8吸热侧吸热成为高温工质,两者再汇合进入低温用户端3-4放热侧中放热。When the low-temperature heating system supplies heat, the low-temperature working fluid on the heat-absorbing side of the low-temperature user terminal 3-4 is pressurized by the cooling pump 3-5, and part of it absorbs heat through the high-pressure cooler 1-3 to become a high-temperature working medium. A part absorbs heat through the heat-absorbing side of the low-pressure cooler 1-8 and becomes a high-temperature working medium, and the two merge into the heat-releasing side of the low-temperature user end 3-4 to release heat.
本发明通过在二氧化碳-熔盐换热器1-6前侧布置地热田1-5,实现二氧化碳从液态到气态的转变,避免气液两相流动不稳定导致的换热器3-3损坏问题。另外,本发明在膨胀机1-7的入口前布置地热田1-5及二氧化碳-熔盐换热器1-6,通过对太阳能和地热能在卡诺电池发电系统中的梯级利用,实现高效发电。In the present invention, by arranging the geothermal field 1-5 in front of the carbon dioxide-molten salt heat exchanger 1-6, the transformation of carbon dioxide from a liquid state to a gaseous state is realized, and the problem of damage to the heat exchanger 3-3 caused by unstable gas-liquid two-phase flow is avoided . In addition, the present invention arranges the geothermal field 1-5 and the carbon dioxide-molten salt heat exchanger 1-6 before the entrance of the expander 1-7, and realizes high efficiency through cascaded utilization of solar energy and geothermal energy in the Carnot battery power generation system. generate electricity.
最后应当说明的是:以上实施例仅用以说明本发明的技术方案而非对其限制,尽管参照上述实施例对本发明进行了详细的说明,所属领域的普通技术人员应当理解:依然可以对本发明的具体实施方式进行修改或者等同替换,而未脱离本发明精神和范围的任何修改或者等同替换,其均应涵盖在本发明的权利要求保护范围之内。Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall fall within the protection scope of the claims of the present invention.
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