CN114046230B - Compressed air energy storage and hot water-containing stratum geothermal exploitation coupling system - Google Patents
Compressed air energy storage and hot water-containing stratum geothermal exploitation coupling system Download PDFInfo
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- CN114046230B CN114046230B CN202111141764.9A CN202111141764A CN114046230B CN 114046230 B CN114046230 B CN 114046230B CN 202111141764 A CN202111141764 A CN 202111141764A CN 114046230 B CN114046230 B CN 114046230B
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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
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/04—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using pressure differences or thermal differences occurring in nature
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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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
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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
- Y02E10/10—Geothermal 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a coupling system for compressed air energy storage and geothermal exploitation of a hot water-containing stratum, which comprises a compressed air energy storage system and a geothermal exploitation system of the hot water-containing stratum; the compressed air energy storage system comprises an air compressor and a compressed air generator set, wherein an air outlet of the air compressor is communicated with the stratum containing hot water through an air pipe, and the air pipe is communicated with an air inlet of the compressed air generator set; the geothermal exploitation system of the stratum containing hot water comprises a ground hot water pool and a geothermal power generator set, wherein the inner cavity of the ground hot water pool is communicated with the air inlet of the compressed air power generator set, the ground hot water pool is communicated with the stratum containing hot water through a water pipe, and the ground hot water pool generates power through the geothermal power generator set; the air compressor, the compressed air generator set and the geothermal generator set are respectively connected with a power grid. The coupling system is beneficial to improving the power generation efficiency of the compressed air energy storage system, and the geothermal heat compensation for the compressed air generator set does not need to adopt petrochemical fuel for afterburning, and has the advantages of high energy utilization efficiency, reduced carbon emission and the like.
Description
Technical Field
The invention belongs to the field of underground compressed air energy storage and geothermal energy development and utilization for realizing 'carbon reaching peak and carbon neutralization', and particularly relates to a compressed air energy storage and geothermal exploitation coupling system for a stratum containing hot water.
Background
The primary measure for achieving the peak-to-carbon goal is to reduce the use of fossil energy and increase the utilization of green renewable energy sources such as wind power, photovoltaics and the like. In the energy storage process of the compressed air energy storage cavity, compressed air is driven by using off-peak electricity, wind-energy-discarding electricity and photoelectric energy-discarding electricity, the air is compressed to a high-pressure state and stored in the underground cavity, and the electric energy is converted into the internal energy of the compressed air; when the electricity is used for peak load, the high-pressure air stored in the underground cavity is discharged, and then enters the turbine to do work to complete expansion power generation. The compressed air energy storage is stored/discharged in time intervals, so that the compressed air energy storage realizes the peak clipping and valley filling effects on electric energy, keeps the stable operation of an electric power system, can effectively avoid the intermittence and fluctuation of renewable energy sources such as wind energy, solar energy and the like, and improves the utilization rate of the renewable energy sources.
Geothermal energy of a stratum containing hot water is a clean resource, can be used for power generation and heating, and has multiple functions and wide application. During the exploitation and use process, harmful gases such as carbon dioxide and the like are not generated, and the waste water is not discharged to pollute the soil river. When the geothermal energy is used, a part of fossil energy can be replaced, the influence on the environment is reduced, and the effect of saving resources is achieved on the geothermal energy development. Practice shows that the social, economic and environmental benefits are remarkable, and the method has an increasingly important effect in the development of national economy.
In the existing compressed air energy storage system, fossil energy fuel is required to be adopted for afterburning to heat high-pressure air and generate electricity through a generator set in the energy release stage, so that the investment cost in the compressed air energy storage system is increased, and carbon dioxide generated after fossil energy is combusted pollutes the atmosphere. The compressed air energy storage and the geothermal exploitation of the stratum containing hot water are combined, so that the method has important significance in the aspects of realizing underground renewable energy utilization and energy storage, not only can utilize geothermal resources of the stratum containing hot water, but also can be used as a compressed air storage space for heating air temperature in a gas storage stage, and simultaneously, heat collected in a geothermal exploitation process can be utilized for supplementing heat for high-pressure air in a compressed air generator set, so that the afterburning of fossil energy is not needed any more, the purpose of integrating gas storage, heating gas and geothermal resource utilization is achieved, the energy utilization efficiency of a system is effectively improved, the national energy policy of lowering carbon and reducing emission is met, and the method has important effect on realizing multiple energy coupling utilization.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the compressed air energy storage and hot water-containing stratum geothermal exploitation coupling system, which utilizes the temperature of the hot water-containing stratum to heat high-pressure air in the energy storage stage, and the heat collected in the geothermal development process is used for supplementing heat in the energy release stage of the compressed air energy storage system, thereby being beneficial to improving the power generation efficiency of the compressed air energy storage system, and supplementing heat for the compressed air generator set in the compressed air energy storage system, and the compressed air energy storage system does not need to adopt petrochemical fuel to supplement combustion and has the advantages of high energy utilization efficiency, reduced carbon emission and the like.
The technical scheme adopted for solving the technical problems is as follows: the coupling system for compressed air energy storage and geothermal exploitation of the stratum with hot water comprises a compressed air energy storage system and a geothermal exploitation system of the stratum with hot water;
the air compressor air outlet is communicated with the hot water-containing stratum through an air pipe, and the air pipe is communicated with an air inlet of the compressed air generator set;
the geothermal exploitation system of the hot water-containing stratum comprises a ground hot water tank and a geothermal power generating unit, wherein the ground hot water tank adopts a closed box body structure, an inner cavity of the ground hot water tank is communicated with an air inlet of the compressed air generating unit, the ground hot water tank is communicated with the hot water-containing stratum through a water pipe, and the ground hot water tank generates power through the geothermal power generating unit;
the air compressor, the compressed air generator set and the geothermal generator set are respectively connected with a power grid;
in the energy storage stage, the air compressor is driven by using off-peak electricity, wind-discarding electricity and photovoltaic energy in the power grid to generate high-pressure air, the high-pressure air enters a hot water-containing stratum, a high-pressure air storage space is formed in the hot water-containing stratum, and hot water in the hot water-containing stratum is extruded into a ground hot water pool; in the high-pressure compressed air power generation stage, high-pressure air heated by a hot water-containing stratum is discharged into a compressed air power generator set, water vapor in a ground hot water tank supplements heat for the high-pressure air in the compressed air power generator set, the compressed air power generator set generates power, and meanwhile, hot water in the ground hot water tank generates power through a geothermal power generator set; after the high-pressure compressed air power generation is finished, the high-pressure air storage space disappears, water in the ground hot water tank flows back to the hot water-containing stratum, and the energy storage step and the high-pressure compressed air power generation step are repeated, so that the circulating operation of the compressed air energy storage and hot water-containing stratum geothermal exploitation coupling system can be realized.
The working principle of the compressed air energy storage and hot water-containing stratum geothermal exploitation coupling system in a cycle is as follows: injecting high-pressure air into a hot water-containing stratum, extruding hot water in the hot water-containing stratum into a ground hot water tank by the high-pressure air, releasing the high-pressure air in the hot water-containing stratum, supplementing heat and generating power by utilizing water vapor in the ground hot water tank to the high-pressure air in a compressed air generator set, generating power by the hot water in the ground hot water tank through a geothermal generator set, refluxing water in the ground hot water tank into the hot water-containing stratum, and re-injecting the high-pressure air into the hot water-containing stratum.
Preferably, a first valve is arranged between the air outlet of the air compressor and the air pipe, a second valve is arranged between the air pipe and the air inlet of the compressed air generator set, the inner cavity of the ground hot water tank is communicated with the air inlet of the compressed air generator set through a heat supplementing pipeline, a third valve is arranged on the heat supplementing pipeline, and a fourth valve is arranged on the water pipe. In the energy storage stage, the first valve and the fourth valve are opened, and the second valve and the third valve are closed; in the high-pressure compressed air power generation stage, the second valve and the third valve are opened, and the first valve and the fourth valve are closed. The first valve, the second valve, the third valve and the fourth valve can better control the circulating operation of the whole coupling system, and the automatic switching of the coupling system among different operation stages is realized.
Preferably, the water-containing stratum is a naturally-formed water-containing stratum, an upper water-resisting layer is arranged on the upper side of the water-containing stratum, a lower water-resisting layer is arranged on the lower side of the water-containing stratum, and the air pipe and the water pipe respectively penetrate through the upper water-resisting layer and extend into the water-containing stratum.
Compared with the prior art, the invention has the following advantages:
(1) The coupling system heats high-pressure air in the energy storage stage by utilizing the temperature of the stratum containing hot water, and the heat acquired in the geothermal development process is used for supplementing heat in the energy release stage of the compressed air energy storage system, so that the power generation efficiency of the compressed air energy storage system is improved, the compressed air generator set is used for supplementing heat by geothermal heat in the compressed air energy storage system, petrochemical fuel is not required to be used for afterburning, and the coupling system has the advantages of high energy utilization efficiency, carbon emission reduction and the like;
(2) The coupling system of the invention uses the stratum containing hot water as a temporary high-pressure gas storage space, so that the construction cost of excavating an underground compressed gas energy storage cavity is avoided;
(3) The coupling system couples the compressed air energy storage system with the geothermal exploitation system of the stratum containing hot water, so that the geothermal in the stratum containing hot water can be exploited in the energy storage process, and the energy utilization efficiency of the system is improved.
Drawings
FIG. 1 is a schematic diagram of an exemplary embodiment of a coupling system for compressed air energy storage and geothermal exploitation of a hot water bearing formation.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
The embodiment of the coupling system for compressed air energy storage and geothermal exploitation of the stratum with hot water is shown in fig. 1, and comprises a compressed air energy storage system and a geothermal exploitation system of the stratum with hot water; the compressed air energy storage system comprises an air compressor 1 and a compressed air generator set 2, wherein an air outlet of the air compressor 1 is communicated with a hot water-containing stratum 4 through an air pipe 3, and the air pipe 3 is communicated with an air inlet of the compressed air generator set 2; the geothermal exploitation system of the stratum containing hot water comprises a ground hot water tank 5 and a geothermal power generator set 6, wherein the ground hot water tank 5 adopts a closed box body structure, the inner cavity of the ground hot water tank 5 is communicated with the air inlet of the compressed air power generator set 2, the ground hot water tank 5 is communicated with the stratum containing hot water 4 through a water pipe 7, and the ground hot water tank 5 generates power through the geothermal power generator set 6; the air compressor 1, the compressed air generator set 2 and the geothermal generator set 6 are respectively connected with a power grid 8.
In this embodiment, a first valve 9 is installed between the air outlet of the air compressor 1 and the air pipe 3, a second valve 10 is installed between the air pipe 3 and the air inlet of the compressed air generator set 2, the inner cavity of the ground hot water tank 5 is communicated with the air inlet of the compressed air generator set 2 through a heat supplementing pipeline 11, a third valve 12 is installed on the heat supplementing pipeline 11, and a fourth valve 13 is installed on the water pipe 7.
In this embodiment, the hot water bearing formation 4 is a naturally occurring hot water bearing formation 4, the upper side of the hot water bearing formation 4 has an upper water barrier 14, the lower side of the hot water bearing formation 4 has a lower water barrier 15, and the gas pipe 3 and the water pipe 7 extend into the hot water bearing formation 4 through the upper water barrier 14, respectively.
The operation process of the coupling system is as follows: in the energy storage stage, a first valve 9 and a fourth valve 13 are opened, a second valve 10 and a third valve 12 are closed, the air compressor 1 is driven by using low-valley electricity, wind-discarding electricity and photoelectric energy in the power grid 8 to generate high-pressure air, the high-pressure air enters the hot water containing stratum 4 along the air pipe 3, a high-pressure air storage space 16 is formed in the hot water containing stratum 4, and hot water in the hot water containing stratum 4 is extruded into the ground hot water tank 5 along the water pipe 7; in the high-pressure compressed air power generation stage, a second valve 10 and a third valve 12 are opened, a first valve 9 and a fourth valve 13 are closed, high-pressure air heated by a hot water-containing stratum 4 is discharged into a compressed air power generation unit 2 through an air pipe 3, water vapor in a ground hot water tank 5 supplements heat for the high-pressure air in the compressed air power generation unit 2 along a heat supplementing pipeline 11, the compressed air power generation unit 2 generates power, and meanwhile, hot water in the ground hot water tank 5 generates power through a geothermal power generation unit 6; after the high-pressure compressed air power generation is finished, the high-pressure air storage space 16 in the hot water containing stratum 4 disappears, water in the ground hot water tank 5 flows back into the hot water containing stratum 4, and the energy storage step and the high-pressure compressed air power generation step are repeated, so that the circulating operation of the coupling system of compressed air energy storage and geothermal exploitation of the hot water containing stratum 4 can be realized.
Claims (3)
1. The coupling system for compressed air energy storage and geothermal exploitation of the stratum containing hot water is characterized by comprising a compressed air energy storage system and a geothermal exploitation system of the stratum containing hot water;
the air compressor air outlet is communicated with the hot water-containing stratum through an air pipe, and the air pipe is communicated with an air inlet of the compressed air generator set;
the geothermal exploitation system of the hot water-containing stratum comprises a ground hot water tank and a geothermal power generating unit, wherein the ground hot water tank adopts a closed box body structure, an inner cavity of the ground hot water tank is communicated with an air inlet of the compressed air generating unit, the ground hot water tank is communicated with the hot water-containing stratum through a water pipe, and the ground hot water tank generates power through the geothermal power generating unit;
the air compressor, the compressed air generator set and the geothermal generator set are respectively connected with a power grid;
in the energy storage stage, the air compressor is driven by using off-peak electricity, wind-discarding electricity and photovoltaic energy in the power grid to generate high-pressure air, the high-pressure air enters a hot water-containing stratum, a high-pressure air storage space is formed in the hot water-containing stratum, and hot water in the hot water-containing stratum is extruded into a ground hot water pool; in the high-pressure compressed air power generation stage, high-pressure air heated by a hot water-containing stratum is discharged into a compressed air power generator set, water vapor in a ground hot water tank supplements heat for the high-pressure air in the compressed air power generator set, the compressed air power generator set generates power, and meanwhile, hot water in the ground hot water tank generates power through a geothermal power generator set; after the high-pressure compressed air power generation is finished, the high-pressure air storage space disappears, water in the ground hot water tank flows back to the hot water-containing stratum, and the energy storage step and the high-pressure compressed air power generation step are repeated, so that the circulating operation of the compressed air energy storage and hot water-containing stratum geothermal exploitation coupling system can be realized.
2. The coupling system for geothermal exploitation of a compressed air energy storage and hot water-containing stratum according to claim 1, wherein a first valve is installed between an air outlet of the air compressor and the air pipe, a second valve is installed between the air pipe and an air inlet of the compressed air generator set, an inner cavity of the ground hot water tank is communicated with the air inlet of the compressed air generator set through a heat supplementing pipeline, a third valve is installed on the heat supplementing pipeline, and a fourth valve is installed on the water pipe.
3. The geothermal production coupling system of claim 1 or 2, wherein the hot water bearing formation is a naturally occurring hot water bearing formation, an upper water barrier is provided on an upper side of the hot water bearing formation, a lower water barrier is provided on a lower side of the hot water bearing formation, and the gas pipe and the water pipe extend into the hot water bearing formation through the upper water barrier, respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111141764.9A CN114046230B (en) | 2021-09-28 | 2021-09-28 | Compressed air energy storage and hot water-containing stratum geothermal exploitation coupling system |
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| CN202111141764.9A CN114046230B (en) | 2021-09-28 | 2021-09-28 | Compressed air energy storage and hot water-containing stratum geothermal exploitation coupling system |
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| CN114046230B true CN114046230B (en) | 2023-07-21 |
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| CN114962223B (en) * | 2022-05-05 | 2024-04-12 | 吉能国际能源有限公司 | Compressed air energy storage system of molten salt medium and operation method thereof |
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| GB1583648A (en) * | 1976-10-04 | 1981-01-28 | Acres Consulting Services | Compressed air power storage systems |
| CA2742424A1 (en) * | 2011-06-07 | 2012-12-07 | Andrew Marks De Chabris | Compressed air energy storage and release system |
| CN205225594U (en) * | 2015-12-01 | 2016-05-11 | 邢培奇 | Low temperature power generation system in geothermol power |
| FR3066255B1 (en) * | 2017-05-11 | 2019-11-08 | Pluton Dg | SYSTEM AND METHOD FOR THE PRODUCTION AND STORAGE OF GEOTHERMAL ENERGY |
| CN108930627B (en) * | 2018-07-06 | 2020-10-27 | 西安交通大学 | Constant-pressure water pumping compressed gas energy storage system and energy storage method |
| CN210345939U (en) * | 2019-05-22 | 2020-04-17 | 天津大学 | Deep well geothermal power generation, heat storage and heat supply system for power grid peak shaving |
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