CN114046230A - Air compression energy storage and hot water-containing stratum geothermal exploitation coupling system - Google Patents
Air compression energy storage and hot water-containing stratum geothermal exploitation coupling system Download PDFInfo
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- CN114046230A CN114046230A CN202111141764.9A CN202111141764A CN114046230A CN 114046230 A CN114046230 A CN 114046230A CN 202111141764 A CN202111141764 A CN 202111141764A CN 114046230 A CN114046230 A CN 114046230A
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- hot water
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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
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 a 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 a 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 stratum containing hot water comprises a ground hot water pool and a geothermal power generating set, wherein an inner cavity of the ground hot water pool is communicated with an air inlet of the compressed air power generating 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 generating 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 compressed air generator set supplements heat with geothermal heat without adopting petrochemical fuel for afterburning, so that the coupling system has the advantages of high energy utilization efficiency, carbon emission reduction and the like.
Description
Technical Field
The invention belongs to the field of underground compressed air energy storage and geothermal energy development and utilization of 'carbon peak reaching and carbon neutralization' double targets, and particularly relates to a compressed air energy storage and hot water-containing stratum geothermal exploitation coupling system.
Background
The primary measures for realizing the carbon peak-reaching target are to reduce the use of fossil energy and increase the utilization of green renewable energy sources such as wind power, photovoltaic and the like. In the energy storage process of the air compression energy storage cavern, the off-peak electricity, the abandoned wind electricity and the abandoned light electricity are used for driving compressed air, the air is compressed to a high-pressure state and stored in the underground cavern, and the electric energy is converted into the internal energy of the compressed air; when the peak load of electricity utilization, the high-pressure air stored in the underground cavern is discharged, so that the high-pressure air enters a turbine to do work to complete expansion power generation. The compressed air energy storage and energy release characteristics in different time periods enable the compressed air energy storage to realize the effect of peak clipping and valley filling on electric energy, keep a power system to operate stably, effectively avoid the intermittence and fluctuation of renewable energy sources such as wind energy and solar energy, and improve the utilization rate of the renewable energy sources.
The geothermal energy of the hot water-containing stratum is a clean resource, can be used for generating electricity and heating, and has multiple functions and wide application. During the mining and using process, harmful gases such as carbon dioxide and the like are not generated, and waste water is not discharged to pollute soil rivers. When the geothermal energy is used, the energy-saving device can replace a part of fossil energy, reduce the influence on the environment and play a role in saving resources for the development of the geothermal energy. Practice shows that the method has remarkable social, economic and environmental benefits and plays an increasingly important role in developing national economy.
In the conventional compressed air energy storage system, fossil energy fuel is required to be used for afterburning and heating high-pressure air in an energy release stage and generating electricity through a generator set, so that the investment cost in the compressed air energy storage system is increased, and carbon dioxide generated after the fossil energy is combusted pollutes the atmospheric environment. The compressed air energy storage and the geothermal exploitation of the hot water-containing stratum are combined, the method has important significance in the aspect of realizing the utilization of underground renewable energy sources and energy storage, geothermal resources of the hot water-containing stratum can be utilized and can be used as an air storage space of compressed air to heat the air temperature in the air storage stage, meanwhile, heat collected in the geothermal exploitation process can be utilized to supplement heat for high-pressure air in a compressed air generator set, the supplementary combustion of fossil energy is not needed, the purpose of integrating the utilization of the air storage, the heated gas and the geothermal resources is achieved, the energy utilization efficiency of the system is effectively improved, the method conforms to the national energy policy of carbon reduction and emission reduction, and the method has important effect on realizing the coupling utilization of multiple energy sources.
Disclosure of Invention
The invention aims to solve the technical problem that the prior art is not enough, and provides a coupling system for compressed air energy storage and geothermal exploitation of a hot water-containing stratum.
The technical scheme adopted by the invention for solving the technical problems is as follows: a kind of compressed air energy storage and geothermal exploitation coupling system of stratum containing hot water, including compressed air energy storage system and geothermal exploitation system of stratum containing hot water;
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 a 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 stratum containing hot water comprises a ground hot water pool and a geothermal power generating set, wherein the ground hot water pool adopts a closed box body structure, an inner cavity of the ground hot water pool is communicated with an air inlet of the compressed air power generating 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 generating set;
the air compressor, the compressed air generating set and the geothermal generating set are respectively connected with a power grid;
in the energy storage stage, the low valley electricity, the abandoned wind electricity and the abandoned photoelectric energy in the power grid are used for driving an air compressor to generate high-pressure air, the high-pressure air enters the hot water-containing stratum to form a high-pressure air storage space in the hot water-containing stratum, and hot water in the hot water-containing stratum is extruded to 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 pool 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 pool 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 pool 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 cyclic 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 one cycle is as follows: injecting high-pressure air into the hot water-containing stratum → the high-pressure air extrudes hot water in the hot water-containing stratum into a ground hot water pool → releasing the high-pressure air in the hot water-containing stratum → utilizing water vapor in the ground hot water pool to supplement heat for the high-pressure air in the compressed air generating set and generate electricity → hot water in the ground hot water pool generates electricity through the geothermal generating set → water in the ground hot water pool flows back into the hot water-containing stratum → injecting the high-pressure air into the hot water-containing stratum again.
Preferably, a first valve is arranged between an air outlet of the air compressor and the air pipe, a second valve is arranged 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 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 circulating operation of the whole coupling system can be better controlled through the first valve, the second valve, the third valve and the fourth valve, and the automatic switching of the coupling system among different operation stages is realized.
Preferably, the hot water-containing stratum is a naturally-formed hot water-containing stratum, an upper water-resisting layer is arranged on the upper side of the hot water-containing stratum, a lower water-resisting layer is arranged on the lower side of the hot water-containing stratum, and the air pipe and the water pipe respectively penetrate through the upper water-resisting layer and extend into the hot water-containing stratum.
Compared with the prior art, the invention has the following advantages:
(1) the coupling system utilizes the temperature of a hot water-containing stratum to heat high-pressure air in an energy storage stage, and the heat collected in the geothermal development process is used for heat supplement in an 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;
(2) the coupling system of the invention utilizes the hot water-containing stratum as a temporary high-pressure gas storage space, and the construction cost for excavating the underground compressed gas energy storage cavern is avoided;
(3) the coupling system couples the compressed air energy storage system with the geothermal exploitation system of the hot water-containing stratum, can realize exploitation of geothermal energy in the hot water-containing stratum in the energy storage process, and improves the energy utilization efficiency of the system.
Drawings
Fig. 1 is a schematic structural diagram of a system for coupling compressed air energy storage and geothermal exploitation of a hot water-containing formation according to an embodiment.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The compressed air energy storage and hot water-containing stratum geothermal exploitation coupling system comprises a compressed air energy storage system and a hot water-containing stratum geothermal exploitation system, as shown in fig. 1; 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 pool 5 and a geothermal power generating set 6, wherein the ground hot water pool 5 adopts a closed box body structure, an inner cavity of the ground hot water pool 5 is communicated with an air inlet of the compressed air power generating set 2, the ground hot water pool 5 is communicated with the stratum containing hot water 4 through a water pipe 7, and the ground hot water pool 5 generates power through the geothermal power generating 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, install first valve 9 between air compressor 1's the gas outlet and the trachea 3, install second valve 10 between the air inlet of trachea 3 and compressed air generating set 2, the inner chamber of ground hot-water pond 5 communicates with each other through the air inlet of concurrent heating pipeline 11 with compressed air generating set 2, installs third valve 12 on the concurrent heating pipeline 11, installs fourth valve 13 on the water pipe 7.
In this embodiment, the hot water-containing formation 4 is a naturally-formed hot water-containing formation 4, an upper water-resisting layer 14 is provided on the upper side of the hot water-containing formation 4, a lower water-resisting layer 15 is provided on the lower side of the hot water-containing formation 4, and the gas pipe 3 and the water pipe 7 respectively penetrate through the upper water-resisting layer 14 and extend into the hot water-containing formation 4.
The operation process of the coupling system is as follows: in the energy storage stage, the first valve 9 and the fourth valve 13 are opened, the second valve 10 and the third valve 12 are closed, the air compressor 1 is driven to generate high-pressure air by utilizing valley electricity, wind electricity abandoning and light electricity abandoning energy in the power grid 8, 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 to the ground hot water pool 5 along the water pipe 7; in the high-pressure compressed air power generation stage, the second valve 10 and the third valve 12 are opened, the first valve 9 and the fourth valve 13 are closed, high-pressure air heated by the hot water-containing stratum 4 is discharged into the compressed air power generator set 2 through the air pipe 3, water vapor in the ground hot water pool 5 supplements heat to the high-pressure air in the compressed air power generator set 2 along the heat supplementing pipeline 11, the compressed air power generator set 2 generates power, and meanwhile, hot water in the ground hot water pool 5 generates power through the geothermal power generator set 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 to 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 cyclic operation of the compressed air energy storage and hot water-containing stratum 4 geothermal exploitation coupling system can be realized.
Claims (3)
1. The coupling system for compressed air energy storage and geothermal exploitation of the hot water-containing stratum is characterized by comprising 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 a 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 stratum containing hot water comprises a ground hot water pool and a geothermal power generating set, wherein the ground hot water pool adopts a closed box body structure, an inner cavity of the ground hot water pool is communicated with an air inlet of the compressed air power generating 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 generating set;
the air compressor, the compressed air generating set and the geothermal generating set are respectively connected with a power grid;
in the energy storage stage, the low valley electricity, the abandoned wind electricity and the abandoned photoelectric energy in the power grid are used for driving an air compressor to generate high-pressure air, the high-pressure air enters the hot water-containing stratum to form a high-pressure air storage space in the hot water-containing stratum, and hot water in the hot water-containing stratum is extruded to 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 pool 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 pool 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 pool 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 cyclic operation of the compressed air energy storage and hot water-containing stratum geothermal exploitation coupling system can be realized.
2. The coupling system for compressed air energy storage and geothermal exploitation of a hot water-containing formation 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 coupling system for compressed gas energy storage and geothermal production from a hot water-bearing formation according to 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.
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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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114962223A (en) * | 2022-05-05 | 2022-08-30 | 中能建数字科技有限公司 | Compressed air energy storage system of molten salt medium and operation method thereof |
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| US4150547A (en) * | 1976-10-04 | 1979-04-24 | Hobson Michael J | Regenerative heat storage in compressed air power system |
| US20140338315A1 (en) * | 2011-06-07 | 2014-11-20 | Andrew Marks de Chabris | Compressed gas energy storage and release system |
| CN205225594U (en) * | 2015-12-01 | 2016-05-11 | 邢培奇 | Low temperature power generation system in geothermol power |
| CN108930627A (en) * | 2018-07-06 | 2018-12-04 | 西安交通大学 | A kind of level pressure is drawn water compressed gas energy-storage system and energy storage method |
| EP3635250A1 (en) * | 2017-05-11 | 2020-04-15 | Pluton DG | Geothermal system and method for producing and storing power in thermal form |
| 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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2021
- 2021-09-28 CN CN202111141764.9A patent/CN114046230B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4150547A (en) * | 1976-10-04 | 1979-04-24 | Hobson Michael J | Regenerative heat storage in compressed air power system |
| US20140338315A1 (en) * | 2011-06-07 | 2014-11-20 | Andrew Marks de Chabris | Compressed gas energy storage and release system |
| CN205225594U (en) * | 2015-12-01 | 2016-05-11 | 邢培奇 | Low temperature power generation system in geothermol power |
| EP3635250A1 (en) * | 2017-05-11 | 2020-04-15 | Pluton DG | Geothermal system and method for producing and storing power in thermal form |
| CN108930627A (en) * | 2018-07-06 | 2018-12-04 | 西安交通大学 | A kind of level pressure is drawn water 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114962223A (en) * | 2022-05-05 | 2022-08-30 | 中能建数字科技有限公司 | Compressed air energy storage system of molten salt medium and operation method thereof |
| 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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