CN107917074B - Special air compressor system for supplying air to constant-pressure air storage source - Google Patents
Special air compressor system for supplying air to constant-pressure air storage source Download PDFInfo
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- CN107917074B CN107917074B CN201711099248.8A CN201711099248A CN107917074B CN 107917074 B CN107917074 B CN 107917074B CN 201711099248 A CN201711099248 A CN 201711099248A CN 107917074 B CN107917074 B CN 107917074B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C13/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C13/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01C13/04—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby for driving pumps or compressors
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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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/004—Valve arrangements
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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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
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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
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to the technical field of electric energy storage, and particularly relates to a special air compressor system for supplying air to a constant-pressure air storage source, which comprises the following components in sequential coaxial connection: motor M, hydraulic turbine G and screw air compressor C to hydraulic turbine G one end is passed through high-pressure liquid pipeline D2 and is linked to each other with pressure vessel A bottom, is equipped with flow valve F on the high-pressure liquid pipeline D2, and pressure vessel A top is passed through high-pressure gas pipeline D1 and is linked to each other with screw air compressor C's gas vent P3, and hydraulic turbine G's the other end and screw air compressor C's water inlet P2 link to each other with low pressure cistern B respectively, and screw air compressor C's air inlet P1 links to each other with the atmosphere. When the water turbine is in operation, the motor M drives the screw air compressor C to rotate, outside air and low-pressure water flow into the air compressor to be mixed and compressed and then are sent to the pressure container A, meanwhile, the flow valve F is controlled to discharge high-pressure water with the same volume in the pressure container A to the water turbine G, and the high-pressure water enables the water turbine G to drive the screw air compressor C to continuously operate.
Description
Technical Field
The invention belongs to the technical field of electric power energy storage, and particularly relates to a special air compressor system for supplying air to a constant-pressure air storage source.
Background
The compressed air energy storage technology in the prior art comprises an energy storage process and an energy release process, and the principle is as follows: in the energy storage process, the air compressor compresses air under the driving of electric energy, and the electric energy is converted into internal energy of the compressed air and stored in the air storage container; in the energy releasing process, compressed air in the air storage container is discharged, and expands in the air expander to do work, so that the large shaft is driven to rotate, the generator is driven to generate electricity, and electric energy is output to the outside.
Pumped storage is an energy storage mode which is commonly adopted in the prior art, the technology is relatively mature, but pumped storage has the limitation of being greatly influenced by the terrain, the construction of the pumped storage must have proper geographical conditions, and the pumped storage is difficult to realize in many areas. Another energy storage mode which is more commonly adopted in the prior art is compressed air energy storage, which is less limited by geographical conditions, and the technology of the energy storage mode is mature day by day and has the condition of large-scale commercial application. However, when the air is operated under the working condition of a lower pressure grade, the same pressure is increased, and a larger volume needs to be compressed, so that the conventional compressed air energy storage system is operated under the condition of low pressure, the compression efficiency is lower, and the operation cost is higher. The screw air compressor has high air compression efficiency under the condition of medium and low pressure, but the problem of fluctuation of the air pressure in the air storage container during compression is solved, so that the system cannot stably output constant pressure, and hidden troubles also exist in the aspect of safe operation of the system. Therefore, in the prior art, realizing high-efficiency constant-pressure air supply under the working condition of medium-low pressure operation becomes a technical problem to be solved urgently in the technical field.
Disclosure of Invention
Aiming at the problems of low compression efficiency of low-pressure operation of the existing energy storage system and continuous fluctuation of air supply pressure of a screw air compressor technology, the invention provides a special air compressor system for supplying air to a constant-pressure air storage source, which comprises the following components in sequential coaxial connection: motor M, hydraulic turbine G and screw air compressor C, and hydraulic turbine G one end passes through high-pressure liquid pipeline D2 and links to each other with pressure vessel A bottom, the flow valve F is equipped with on the high-pressure liquid pipeline D2, pressure vessel A top is passed through high-pressure gas pipeline D1 and is linked to each other with screw air compressor C's gas vent P3, hydraulic turbine G's the other end and screw air compressor C's water inlet P2 link to each other with low-pressure cistern B through low-pressure liquid pipeline D3, D4 respectively, screw air compressor C's air inlet P1 passes through low-pressure gas pipeline D5 and links to each other with the atmosphere.
The pressure vessel A is closed to the outside.
When the system operates, the motor M drives the screw type air compressor C to rotate, outside air and low-pressure water flow into the air compressor through the low-pressure liquid pipeline D4 and the low-pressure gas pipeline D5 to be mixed and compressed, after compression is completed, compressed air is sent to the pressure container A through the gas pipeline D1, the flow valve F is controlled at the same time, high-pressure water with the same volume in the pressure container A is discharged to the water turbine G through the high-pressure liquid pipeline D2, the water turbine G is rotated by the high-pressure water and coaxially drives the screw type air compressor C to continuously operate, and the high-pressure water finally becomes low-pressure water and flows into.
And a water replenishing pump is arranged between the screw air compressor C and the low-pressure pipeline D4, and low-pressure water is pumped into the air compressor through the water replenishing pump.
The pressure container A is full of water in the initial state, and the compressed air with constant pressure is continuously moved in to finally discharge all the water in the tank into the compressed air with the same volume and fixed pressure.
The gas pipeline D1 is a gas-liquid mixture, and the gas-liquid mixture is transferred to the pressure container A to finish gas-liquid separation.
The screw air compressor C mixes air at normal pressure with water for compression, and the compressed air is cooled and lubricated by the water, so that the compression efficiency is improved.
In the initial stage of the system, the electric motor drives the water turbine to operate, the rotating speed of the water turbine keeps constant after the synchronous rotating speed is reached, and the water yield of the pressure container A is adjusted through the flow valve F.
The pressure vessel a is stored with compressed air at a constant pressure, i.e. while a certain volume of compressed air is flowing in, an equal volume of high pressure water must be discharged so that the compressed air does not expand or become further compressed in the pressure vessel a.
And the water turbine G is replaced by a bidirectional reversible water turbine, and the motor M is replaced by a generator, so that the system can generate electricity by reversely running.
The beneficial effects of the invention comprise the following aspects:
(1) the invention improves the design of the traditional screw air compressor, obtains power by being coaxially connected with the motor and the water turbine, avoids energy waste caused by directly discharging high-pressure water in the tank into the low-pressure reservoir and improves the compression efficiency of the system.
(2) The invention uses water to replace the conventional compressed oil and air for mixed compression, saves the design of an oil way of a conventional screw air compressor, directly leads the compressed mixture into a pressure container for self-separation, does not need to be additionally provided with a separate gas-water separation device, reduces the complexity of the system and saves the manufacturing cost.
(3) The invention adopts the liquid occupying technology and is matched with the flow valve, thereby ensuring that the flow of the compressed air and the flow of the water are always equal, avoiding the processes of compression and expansion of the air in the air storage container, always keeping the constant-pressure storage state and continuously providing the constant-pressure air source.
(4) The system can be operated reversely and converted into a power generation mode, and provides an implementation scheme of compressed air energy storage power generation.
Drawings
Fig. 1 is a schematic diagram of a dedicated air compressor system for supplying air to a constant-pressure air storage source.
Reference numbers in the figures:
a-pressure container, B-low-pressure reservoir, C-screw air compressor, G-hydraulic turbine, M-motor, F-flow valve, D1-high-pressure gas pipeline, D2-high-pressure liquid pipeline, D3-D4-low-pressure liquid pipeline, D5-low-pressure gas pipeline, P1-screw air compressor air inlet, P2-screw air compressor water inlet, P3-screw air compressor air outlet
Detailed Description
The embodiments are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a special air compressor system for supplying air to a constant-pressure air storage source, wherein a motor M, a water turbine G and a screw air compressor C are coaxially connected, the three rotate at the same speed, a pressure container a is sealed outwards, and two ends of the pressure container a are respectively connected with the water turbine G and the screw air compressor C. The pressure container A is filled with water in an initial state, compressed air is not provided, water with the same volume is discharged to the water turbine along with the injection of the compressed air, the water turbine G and the screw air compressor C are driven to rotate coaxially, the air compressor mixes and compresses low-pressure water and air, then the low-pressure water and the air are transferred to the pressure container A, and the mixture of the compressed air and the water is subjected to gas-liquid separation in the A. The system uses the flow valve F to control the water yield of the pressure container A, so that the water yield is equal to the air inflow, the pressure in the container is kept constant, a water state is required to be kept in the container A all the time, and the phenomenon of idling of the water turbine G is prevented.
And the water turbine G is replaced by a bidirectional reversible water turbine, and the motor M is replaced by a generator, so that the system can generate electricity by reversely running.
The method specifically comprises the following steps:
when the bidirectional reversible water turbine and the generator are driven to operate, the water pump operates to pump water from the low-pressure reservoir B to the pressure container A, and simultaneously, compressed air with the same volume enters the screw air compressor C through the high-pressure gas pipeline D1 to expand and do work to rotate the screw, and the bidirectional reversible water turbine and the generator are driven to operate coaxially to generate electric energy.
The present invention is not limited to the above embodiments, and any changes or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (2)
1. The utility model provides a special air compressor machine system for constant pressure gas storage source air feed which characterized in that, including coaxial continuous in proper order: the water turbine system comprises a motor M, a water turbine G and a screw air compressor C, wherein one end of the water turbine G is connected with the bottom of a pressure container A through a high-pressure liquid pipeline D2, a flow valve F is installed on a high-pressure liquid pipeline D2, the top of the pressure container A is connected with an exhaust port P3 of the screw air compressor C through a high-pressure gas pipeline D1, the other end of the water turbine G and a water inlet P2 of the screw air compressor C are respectively connected with a low-pressure reservoir B through low-pressure liquid pipelines D3 and D4, and a gas inlet P1 of the screw air compressor C is connected with the atmosphere through a low-;
the pressure container A is sealed outwards;
when the system operates, the motor M drives the screw air compressor C to rotate, outside air and low-pressure water flow into the screw air compressor C through the low-pressure liquid pipeline D4 and the low-pressure gas pipeline D5 to be mixed and compressed, after compression is completed, compressed air is sent to the pressure container A through the high-pressure gas pipeline D1, the flow valve F is controlled at the same time, high-pressure water with the same volume in the pressure container A is discharged to the water turbine G through the high-pressure liquid pipeline D2, the water turbine G rotates and coaxially drives the screw air compressor C to continuously operate, and the high-pressure water finally turns into low-pressure water and flows into the low-pressure reservoir B;
a water replenishing pump is arranged between the screw air compressor C and the low-pressure liquid pipeline D4, and low-pressure water is pumped into the screw air compressor C through the water replenishing pump;
the pressure container A is full of water in the initial state, and the water in the tank is completely discharged into compressed air with the same volume and fixed pressure intensity as the compressed air with constant pressure is continuously moved in;
the gas-liquid mixture flows through the high-pressure gas pipeline D1 and is transferred to the pressure container A to complete gas-liquid separation;
the screw air compressor C mixes air at normal pressure with water for compression, and the compressed air is cooled and lubricated by the water, so that the compression efficiency is improved;
in the initial stage of the system, the electric motor drives the water turbine to operate, the rotating speed of the water turbine keeps constant after the synchronous rotating speed is reached, and the water yield of the pressure container A is adjusted through the flow valve F;
the pressure vessel a is stored with compressed air at a constant pressure, i.e. while a certain volume of compressed air is flowing in, an equal volume of high pressure water must be discharged so that the compressed air does not expand or become further compressed in the pressure vessel a.
2. The system of claim 1, wherein the water turbine G is replaced by a bidirectional reversible water turbine, and the electric motor M is replaced by a generator, so that the system can generate electricity by reversely running.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711099248.8A CN107917074B (en) | 2017-11-09 | 2017-11-09 | Special air compressor system for supplying air to constant-pressure air storage source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711099248.8A CN107917074B (en) | 2017-11-09 | 2017-11-09 | Special air compressor system for supplying air to constant-pressure air storage source |
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| Publication Number | Publication Date |
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| CN107917074A CN107917074A (en) | 2018-04-17 |
| CN107917074B true CN107917074B (en) | 2020-06-09 |
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| CN201711099248.8A Active CN107917074B (en) | 2017-11-09 | 2017-11-09 | Special air compressor system for supplying air to constant-pressure air storage source |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108953121B (en) * | 2018-06-29 | 2019-11-12 | 山东大学 | From back pressure constant pressure compressed-air energy-storage system and method |
| TWI840179B (en) * | 2022-07-12 | 2024-04-21 | 豐兆航太股份有限公司 | Pumped storage hydroelectric well |
| CN115978439A (en) * | 2022-12-15 | 2023-04-18 | 中国电建集团西北勘测设计研究院有限公司 | High-pressure gas storage drainage system and method for compressed air energy storage |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434362A (en) * | 2011-12-22 | 2012-05-02 | 王焕然 | Electric power energy storage system of water-gas common-accommodating cabin |
| CN102797613A (en) * | 2011-05-25 | 2012-11-28 | 中国科学院工程热物理研究所 | Water pumping and compressed air energy storage system |
| CN205477784U (en) * | 2016-04-05 | 2016-08-17 | 侍晓云 | Cogeneration of heat and power device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102004007482B4 (en) * | 2004-02-13 | 2010-06-24 | Alstom Technology Ltd. | Power plant |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797613A (en) * | 2011-05-25 | 2012-11-28 | 中国科学院工程热物理研究所 | Water pumping and compressed air energy storage system |
| CN102434362A (en) * | 2011-12-22 | 2012-05-02 | 王焕然 | Electric power energy storage system of water-gas common-accommodating cabin |
| CN205477784U (en) * | 2016-04-05 | 2016-08-17 | 侍晓云 | Cogeneration of heat and power device |
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