CN110080845B - Energy storage system combining cogeneration and compressed air and working method thereof - Google Patents
Energy storage system combining cogeneration and compressed air and working method thereof Download PDFInfo
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- CN110080845B CN110080845B CN201910425615.1A CN201910425615A CN110080845B CN 110080845 B CN110080845 B CN 110080845B CN 201910425615 A CN201910425615 A CN 201910425615A CN 110080845 B CN110080845 B CN 110080845B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000000498 cooling water Substances 0.000 claims abstract description 7
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
-
- 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
- F01K13/00—General layout or general methods of operation of complete plants
-
- 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
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
-
- 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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Abstract
The invention relates to an energy storage system combining heat and power cogeneration and compressed air and a working method thereof, wherein the system comprises a compressed air energy storage system and a heat and power cogeneration system, the compressed air energy storage system comprises a motor, a multi-stage air compressor, a plurality of air inlet heat exchangers, a compressed air storage tank, a multi-stage turbine, a plurality of air exhaust heat exchangers and a generator, and the heat and power cogeneration system comprises a high-pressure deaerator and a water pump; the air inlet pipe is connected with the first-stage air compressor, each-stage air compressor is connected with the air inlet heat exchanger, the last-stage air compressor is connected with the compressed air storage tank through the air inlet heat exchanger, the compressed air storage tank is connected with the first-stage turbine through the exhaust heat exchanger, and each-stage turbine is connected with the first-stage turbine through the exhaust heat exchanger; the cooling water inlet pipe is connected with each air inlet heat exchanger in a dividing and multiplexing way, then is connected with the high-pressure deaerator, and the water outlet pipe of the high-pressure deaerator is connected with each exhaust heat exchanger in a dividing and multiplexing way after passing through the water pump and then is connected back. The system and the working method thereof are beneficial to improving the energy utilization efficiency and reducing the energy storage cost of the compressed air.
Description
Technical Field
The invention relates to the technical field of compressed air energy storage, in particular to an energy storage system combining cogeneration and compressed air and a working method thereof.
Background
In the prior art, a compressed air energy storage system is generally heated in an afterburning mode, a certain amount of primary energy is consumed, and the energy storage cost is high.
Disclosure of Invention
The invention aims to provide an energy storage system combining cogeneration and compressed air and a working method thereof, which are beneficial to improving the energy utilization efficiency and reducing the energy storage cost of the compressed air.
In order to achieve the above purpose, the technical scheme of the invention is as follows: an energy storage system combining heat and power cogeneration and compressed air comprises a compressed air energy storage system and a heat and power cogeneration system, wherein the compressed air energy storage system comprises a motor, a multi-stage air compressor, a plurality of air inlet heat exchangers, a compressed air storage tank, a multi-stage turbine, a plurality of air exhaust heat exchangers and a generator, and the heat and power cogeneration system mainly comprises a high-pressure deaerator and a water pump; the air inlet pipe is connected with the air inlet of the first-stage air compressor, the air outlets of each stage of air compressor are respectively connected with the air inlet of the next-stage air compressor through an air inlet heat exchanger, the air outlet of the last-stage air compressor is connected with the air inlet of the compressed air storage tank through an air inlet heat exchanger, the air outlet of the compressed air storage tank is connected with the first-stage turbine through an air exhaust heat exchanger, the air outlets of each stage of turbine are respectively connected with the air inlet of the next-stage turbine through an air exhaust heat exchanger, and the air outlet of the last-stage turbine is connected with the air exhaust pipe; the cooling water inlet pipe is divided into multiple paths and is respectively connected with the water inlets of the air inlet heat exchangers, the water outlet pipe of each air inlet heat exchanger is connected with the inlet of the high-pressure deaerator, the water outlet pipe of the high-pressure deaerator is respectively connected with the water inlets of the air outlet heat exchangers after passing through the water pump, and the water outlet pipe of each air outlet heat exchanger is connected back to the high-pressure deaerator.
Further, the stages of the multi-stage air compressors are determined according to the pressure of compressed air finally entering the compressed air storage tank, and the temperature range of the compressed air at the outlet of each stage of air compressor is controlled to be 135-145 ℃.
Further, the air inlet pipe is filled with normal-temperature air, compressed air at the outlet of each stage of air compressor enters a corresponding air inlet heat exchanger to exchange heat, the temperature of the compressed air is reduced to 25-45 ℃, the compressed air is sent to the next stage of air compressor, and the compressed air at the outlet of the last stage of air compressor is sent to a compressed air storage tank to be stored after being cooled by the air inlet heat exchanger.
Further, the stages of the multi-stage turbines are determined according to the pressure of compressed air of a final exhaust system, and the temperature range of the compressed air at the inlet of each stage of turbine is controlled to be 135-145 ℃.
Further, the cooling water inlet pipe is filled with normal-temperature desalted water, the normal-temperature desalted water enters each air inlet heat exchanger to cool the compressed air sent out by each air compressor, and the high-temperature water after heat exchange is filled into the high-pressure deaerator.
Further, the high-temperature water led out from the high-pressure deaerator enters each exhaust heat exchanger to heat the compressed air before entering each stage of turbine, and then returns to the high-pressure deaerator.
Further, a power output shaft of the motor is connected with an input shaft of each stage of air compressors to drive each stage of air compressors to work, and a power output shaft of each stage of turbines is connected with an input shaft of the generator to drive the generator to generate electricity.
The invention also provides a working method of the energy storage system combining the cogeneration and the compressed air, which comprises the following steps:
(1) Setting the pressure of compressed air finally entering a compressed air storage tank to be more than or equal to 10MPa, setting the pressure of air finally discharged out of the system to be normal pressure, controlling the compression ratio of each stage of air compressor to be 3, and controlling the inlet and outlet pressure ratio of each stage of turbine to be 3;
(2) The method comprises the steps of sending normal-temperature air into a multi-stage air compressor for multi-stage compression, controlling the temperature range of compressed air at an outlet of each stage of air compressor to be 135-145 ℃, cooling the temperature of the compressed air at the outlet of each stage of air compressor to be 25-45 ℃ through each air inlet heat exchanger, and sending the cooled compressed air at the outlet of the last stage of air compressor into a compressed air storage tank for storage; the high-temperature water after heat exchange is led into a high-pressure deaerator to send the heat generated by the multi-stage air compressor to a cogeneration system for use;
(3) Delivering the compressed air led out from the compressed air storage tank into a multi-stage turbine to perform multi-stage work, heating the temperature of the compressed air at the inlet of each stage of turbine to 135-145 ℃ through each exhaust heat exchanger, and discharging the air at the outlet of the final stage of turbine; the high temperature water required for heat exchange is led from the high pressure deaerator to supply the heat required for the multi-stage turbine by the cogeneration system.
Compared with the prior art, the invention has the beneficial effects that: by combining the cogeneration and the compressed air energy storage, the compressed air is heated by utilizing the heat energy of the cogeneration, and the compressed heat is utilized, so that the energy waste is avoided, the energy utilization efficiency is improved, and the energy storage cost of the compressed air is greatly reduced. Meanwhile, the system has simple structure and reasonable design, and the safety of the energy storage system is improved as the primary energy is not required to be consumed, so that the system has strong practicability and wide application prospect.
Drawings
Fig. 1 is a schematic diagram of a combined heat and power and compressed air energy storage system in accordance with an embodiment of the present invention.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
The invention provides an energy storage system combining cogeneration and compressed air, which is shown in fig. 1, and comprises a compressed air energy storage system and a cogeneration system, wherein the compressed air energy storage system comprises a motor, a multi-stage air compressor, a plurality of air inlet heat exchangers, a compressed air storage tank, a multi-stage turbine, a plurality of exhaust heat exchangers and a generator; the air inlet pipe is connected with the air inlet of the first-stage air compressor, the air outlets of each stage of air compressor are respectively connected with the air inlet of the next-stage air compressor through an air inlet heat exchanger, the air outlet of the last-stage air compressor is connected with the air inlet of the compressed air storage tank through an air inlet heat exchanger, the air outlet of the compressed air storage tank is connected with the first-stage turbine through an air exhaust heat exchanger, the air outlets of each stage of turbine are respectively connected with the air inlet of the next-stage turbine through an air exhaust heat exchanger, and the air outlet of the last-stage turbine is connected with the air exhaust pipe; the cooling water inlet pipe is divided into multiple paths and is respectively connected with the water inlets of the air inlet heat exchangers, the water outlet pipe of each air inlet heat exchanger is connected with the inlet of the high-pressure deaerator, the water outlet pipe of the high-pressure deaerator is respectively connected with the water inlets of the air outlet heat exchangers after passing through the water pump, and the water outlet pipe of each air outlet heat exchanger is connected back to the high-pressure deaerator. The power output shaft of the motor is connected with the input shaft of each stage of air compressor to drive each stage of air compressor to work, and the power output shaft of each stage of turbine is connected with the input shaft of the generator to drive the generator to generate electricity.
The number of stages of the multi-stage air compressors is determined according to the pressure of compressed air finally entering the compressed air storage tank, and the temperature range of the compressed air at the outlet of each stage of air compressor is controlled to be 135-145 ℃. The air inlet pipe is filled with normal-temperature air, compressed air at the outlet of each stage of air compressor enters a corresponding air inlet heat exchanger to exchange heat, the temperature of the compressed air is reduced to 25-45 ℃, the compressed air is sent to the next stage of air compressor, and the compressed air at the outlet of the last stage of air compressor is sent to a compressed air storage tank for storage after being cooled by the air inlet heat exchanger. The number of stages of the multi-stage turbine is determined according to the pressure of compressed air of a final exhaust system, and the temperature range of the compressed air at the inlet of each stage of turbine is controlled to be 135-145 ℃.
The cooling water inlet pipe is filled with normal-temperature desalted water, the normal-temperature desalted water enters each air inlet heat exchanger to cool the compressed air sent by each air compressor, and the high-temperature water after heat exchange is filled into the high-pressure deaerator. The high-pressure deaerator leads out high-temperature water, and the high-temperature water enters each exhaust heat exchanger to heat the compressed air before entering each stage of turbine and then returns to the high-pressure deaerator.
The invention also provides a working method of the energy storage system combining the cogeneration and the compressed air, which comprises the following steps:
(1) Setting the pressure of compressed air finally entering a compressed air storage tank to be more than or equal to 10MPa, setting the pressure of air finally discharged out of the system to be normal pressure, controlling the compression ratio of each stage of air compressor to be 3, and controlling the inlet and outlet pressure ratio of each stage of turbine to be 3;
(2) The method comprises the steps of sending normal-temperature air into a multi-stage air compressor for multi-stage compression, controlling the temperature range of compressed air at an outlet of each stage of air compressor to be 135-145 ℃, cooling the temperature of the compressed air at the outlet of each stage of air compressor to be 25-45 ℃ through each air inlet heat exchanger, and sending the cooled compressed air at the outlet of the last stage of air compressor into a compressed air storage tank for storage; the high-temperature water after heat exchange is led into a high-pressure deaerator to send the heat generated by the multi-stage air compressor to a cogeneration system for use;
(3) Delivering the compressed air led out from the compressed air storage tank into a multi-stage turbine to perform multi-stage work, heating the temperature of the compressed air at the inlet of each stage of turbine to 135-145 ℃ through each exhaust heat exchanger, and discharging the air at the outlet of the final stage of turbine; the high temperature water required for heat exchange is led from the high pressure deaerator to supply the heat required for the multi-stage turbine by the cogeneration system.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and are not limiting; although the invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that modifications and equivalents may be made to the specific embodiments of the invention or to some of the technical features without departing from the spirit of the invention, and they are intended to be covered by the scope of the claimed invention.
Claims (7)
1. The energy storage system is characterized by comprising a compressed air energy storage system and a cogeneration system, wherein the compressed air energy storage system comprises a motor, a multi-stage air compressor, a plurality of air inlet heat exchangers, a compressed air storage tank, a multi-stage turbine, a plurality of exhaust heat exchangers and a generator, and the cogeneration system mainly comprises a high-pressure deaerator and a water pump; the air inlet pipe is connected with the air inlet of the first-stage air compressor, the air outlets of each stage of air compressor are respectively connected with the air inlet of the next-stage air compressor through an air inlet heat exchanger, the air outlet of the last-stage air compressor is connected with the air inlet of the compressed air storage tank through an air inlet heat exchanger, the air outlet of the compressed air storage tank is connected with the first-stage turbine through an air exhaust heat exchanger, the air outlets of each stage of turbine are respectively connected with the air inlet of the next-stage turbine through an air exhaust heat exchanger, and the air outlet of the last-stage turbine is connected with the air exhaust pipe; the cooling water inlet pipe is divided into multiple paths and is respectively connected with the water inlets of the air inlet heat exchangers, the water outlet pipe of each air inlet heat exchanger is connected with the inlet of the high-pressure deaerator, the water outlet pipe of the high-pressure deaerator is respectively connected with the water inlets of the air outlet heat exchangers after passing through the water pump, and the water outlet pipe of each air outlet heat exchanger is connected back to the high-pressure deaerator;
the working method of the energy storage system combining the cogeneration and the compressed air comprises the following steps:
(1) Setting the pressure of compressed air finally entering a compressed air storage tank to be more than or equal to 10MPa, setting the pressure of air finally discharged out of the system to be normal pressure, controlling the compression ratio of each stage of air compressor to be 3, and controlling the inlet and outlet pressure ratio of each stage of turbine to be 3;
(2) The method comprises the steps of sending normal-temperature air into a multi-stage air compressor for multi-stage compression, controlling the temperature range of compressed air at an outlet of each stage of air compressor to be 135-145 ℃, cooling the temperature of the compressed air at the outlet of each stage of air compressor to be 25-45 ℃ through each air inlet heat exchanger, and sending the cooled compressed air at the outlet of the last stage of air compressor into a compressed air storage tank for storage; the high-temperature water after heat exchange is led into a high-pressure deaerator to send the heat generated by the multi-stage air compressor to a cogeneration system for use;
(3) Delivering the compressed air led out from the compressed air storage tank into a multi-stage turbine to perform multi-stage work, heating the temperature of the compressed air at the inlet of each stage of turbine to 135-145 ℃ through each exhaust heat exchanger, and discharging the air at the outlet of the final stage of turbine; the high temperature water required for heat exchange is led from the high pressure deaerator to supply the heat required for the multi-stage turbine by the cogeneration system.
2. The energy storage system combining cogeneration and compressed air according to claim 1, wherein the number of stages of the multi-stage air compressor is determined according to the pressure of the compressed air finally entering the compressed air storage tank, and the temperature range of the compressed air at the outlet of each stage of air compressor is controlled to be 135-145 ℃.
3. The energy storage system combining cogeneration and compressed air according to claim 2, wherein the air inlet pipe is filled with normal-temperature air, the compressed air at the outlet of each stage of air compressor enters a corresponding air inlet heat exchanger to exchange heat, the temperature of the compressed air is reduced to 25-45 ℃, the compressed air is sent to the next stage of air compressor, and the compressed air at the outlet of the last stage of air compressor is sent to a compressed air storage tank to be stored after being cooled by the air inlet heat exchanger.
4. The cogeneration and compressed air combined energy storage system of claim 3 wherein the stages of the multi-stage turbines are determined based on the pressure of the compressed air in the final exhaust system, the temperature range of the compressed air at the inlet of each stage turbine being controlled at 135-145 ℃.
5. The energy storage system combining cogeneration and compressed air according to claim 1, wherein the cooling water inlet pipe is filled with normal-temperature desalted water, the normal-temperature desalted water enters each air inlet heat exchanger to cool the compressed air sent out by each air compressor, and the high-temperature water after heat exchange is filled into the high-pressure deaerator.
6. The cogeneration and compressed air combined energy storage system of claim 5 wherein the high pressure deaerator-derived high temperature water enters each exhaust heat exchanger to heat the compressed air before entering each stage of turbine and then returns to the high pressure deaerator.
7. The cogeneration and compressed air combined energy storage system of claim 1 wherein the power output shaft of the electric motor is connected to the input shaft of each stage of air compressors to drive each stage of air compressors to operate, and the power output shaft of each stage of turbines is connected to the input shaft of the generator to drive the generator to generate electricity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910425615.1A CN110080845B (en) | 2019-05-21 | 2019-05-21 | Energy storage system combining cogeneration and compressed air and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910425615.1A CN110080845B (en) | 2019-05-21 | 2019-05-21 | Energy storage system combining cogeneration and compressed air and working method thereof |
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| CN110080845A CN110080845A (en) | 2019-08-02 |
| CN110080845B true CN110080845B (en) | 2024-03-01 |
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| CN114776393A (en) * | 2022-04-15 | 2022-07-22 | 上海发电设备成套设计研究院有限责任公司 | Air energy storage power generation system and method coupled with thermal power |
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| CN102213113A (en) * | 2011-06-12 | 2011-10-12 | 中国科学院工程热物理研究所 | Compressed-air energy-storage system |
| CN105863751A (en) * | 2016-06-01 | 2016-08-17 | 中国科学院工程热物理研究所 | Closed low temperature compressed air energy storage system and method |
| CN108224535A (en) * | 2018-01-18 | 2018-06-29 | 中国科学院工程热物理研究所 | A kind of thermal power plant's cogeneration of heat and power and compressed-air energy storage complementation integrated system |
| CN208024412U (en) * | 2018-01-17 | 2018-10-30 | 上海发电设备成套设计研究院有限责任公司 | A kind of compressed-air energy-storage system |
| CN209959302U (en) * | 2019-05-21 | 2020-01-17 | 福建省东锅节能科技有限公司 | Energy storage device combining cogeneration and compressed air |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3216989A1 (en) * | 2016-03-11 | 2017-09-13 | NEM Energy B.V. | Combined cycle power plant |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213113A (en) * | 2011-06-12 | 2011-10-12 | 中国科学院工程热物理研究所 | Compressed-air energy-storage system |
| CN105863751A (en) * | 2016-06-01 | 2016-08-17 | 中国科学院工程热物理研究所 | Closed low temperature compressed air energy storage system and method |
| CN208024412U (en) * | 2018-01-17 | 2018-10-30 | 上海发电设备成套设计研究院有限责任公司 | A kind of compressed-air energy-storage system |
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| CN209959302U (en) * | 2019-05-21 | 2020-01-17 | 福建省东锅节能科技有限公司 | Energy storage device combining cogeneration and compressed air |
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