NL2031463B1 - Compressed Air-Gas Reheat Type Combined Cycle Power Generating System - Google Patents
Compressed Air-Gas Reheat Type Combined Cycle Power Generating System Download PDFInfo
- Publication number
- NL2031463B1 NL2031463B1 NL2031463A NL2031463A NL2031463B1 NL 2031463 B1 NL2031463 B1 NL 2031463B1 NL 2031463 A NL2031463 A NL 2031463A NL 2031463 A NL2031463 A NL 2031463A NL 2031463 B1 NL2031463 B1 NL 2031463B1
- Authority
- NL
- Netherlands
- Prior art keywords
- gas
- air
- module
- turbine
- compressed air
- Prior art date
Links
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims abstract description 44
- 238000004146 energy storage Methods 0.000 claims abstract description 34
- 238000005057 refrigeration Methods 0.000 claims abstract description 22
- 238000010248 power generation Methods 0.000 claims abstract description 13
- 230000006835 compression Effects 0.000 claims abstract description 9
- 238000007906 compression Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 238000001816 cooling Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims 10
- 238000010438 heat treatment Methods 0.000 claims 6
- 238000003303 reheating Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 67
- 230000007423 decrease Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/14—Gas-turbine plants having means for storing energy, e.g. for meeting peak loads
- F02C6/16—Gas-turbine plants having means for storing energy, e.g. for meeting peak loads for storing compressed air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/70—Application in combination with
- F05D2220/76—Application in combination with an electrical generator
Landscapes
- 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
Compressed Air-Gas Reheat Type Combined Cycle Power Generating System 5 The present invention provides a compressed air-gas reheat type combined cycle power generating system. The system of the present invention includes a compressed air energy storage module, a lithium bromide refrigeration module, a gas power generating module, a high-pressure air turbine power generating module, a low-pressure air turbine power generating module, an air reheater, and a gas-to-gas heat exchanger module. The compressed air energy storage module is 10 connected to an air storage device, the lithium bromide refrigeration module is connected to the compressed air energy storage module to cool compression heat, gas turbine exhausted air of the gas power generating module is connected to the gas-to-gas heat exchanger module to heat compressed air out of the air storage device, the high-pressure air turbine power generating module is connected to the gas-to-gas heat exchanger module so as to use the heated compressed air to do 15 work for power generation.
Description
Compressed Air-Gas Reheat Type Combined Cycle Power Generating System
The present invention relates to a compressed air-gas reheat type combined cycle power generating system, and belongs to the field of compressed air energy storage.
At present, with the increasing installation proportion of new energy power and the continuous changes in the domestic economic and social structure, the operation modes of the power grid at the power generating end and the power consuming end are both undergoing profound changes, the power generating load and the power consuming load both have volatility, randomness and unpredictability, and especially in recent years, the peak-to-valley difference of the power consuming load of the power grid during the daytime and the nighttime becomes increasingly big.
The situation now gets more and more prominent where the night peak regulation of the power grid solely relies on thermal power units, which not only reduces the utilization rate of the thermal power units and increases coal consumption for power generation, causing a great waste of energy, but also does great harm to the service life of the peak regulation units.
For a long time, a certain proportion of gas power generating units are provided at the power generating side of the power grid for peak and frequency regulation because the gas power generating units having rapid start-up and shut-down characteristics can provide emergency power backup for the power grid during the daytime. In recent years, the power energy storage technology is another important technical direction for solving the problems above and plays an active role in power grid peak load shaving, stabilization of renewable energy fluctuation, providing emergency power support and the like. Compressed air energy storage power generating is an important direction of the field of large-scale clean physical energy storage, which is now under the process of fast development in China, and a plurality of non-afterburning compressed air energy storage power station is under construction.
However, there are certain limitations in both of the gas power generating unit and the compressed air energy storage power generating unit. The operation mode of starting up and shutting down the gas turbine every day can only provide power support during the daytime, and cannot provide help during the nighttime power consuming valleys of the power grid. Although the compressed air energy storage technology having rapidly developed in recent years can draw power from the power grid during the power consuming valleys of the power grid such as the nighttime, the generating capacity thereof is relatively low during the power consuming peaks of the power grid such as the daytime, generally not exceeding 100 MW, and the power support for the power grid is insufficient.
The objective of the present invention is to provide a compressed air-gas reheat type combined cycle power generating system for the above problems. The use of natural gas after burning technology can not only provide a negative load support at the power consuming valleys of the power grid and provide a generating capacity of over 200 MW during the daytime which is far more than the power consumed at energy storage time, but also provide a higher peak power generating capacity during the power consuming peaks. Therefore, the problems can be solved that a gas turbine cannot provide the function of energy storage, and that a general energy storage power generating unit has a low capacity.
The above objective is achieved by means of the following technical solutions: a compressed air-gas reheat type combined cycle power generating system includes a compressed air energy storage module, a lithium bromide refrigeration module, a gas power generating module, a high-pressure air turbine power generating module, a low-pressure air turbine power generating module, an air reheater, and a gas-to-gas heat exchanger module, where the compressed air energy storage module is connected to an air storage device; the lithium bromide refrigeration module is connected to the compressed air energy storage module to cool compression heat; gas turbine exhausted air of the gas power generating module is connected to the gas-to-gas heat exchanger module and the reheater module to heat compressed air out of the air storage device and compressed air entering the reheater; the high-pressure air turbine power generating module is connected to the gas-to-gas heat exchanger module so as to use the heated compressed air to do work for power generation; an exhaust system of the high-pressure air turbine power generating module is connected to the low-pressure air turbine power generating module through the air reheater to do work for power generation; and an exhaust system of the low-pressure air turbine power generating module is connected to an exhaust stack.
According to the compressed air-gas reheat type combined cycle power generating system, the compressed air energy storage module includes 2 to 4 segments of series air energy storage compressors, and a cooler is arranged between the stages of the series air energy storage compressors to cool the compression heat, where inlet air of a low-pressure segment compressor comes from atmosphere.
According to the compressed air-gas reheat type combined cycle power generating system, the lithium bromide refrigeration module includes a lithium bromide refrigeration unit, a cold water tank, and a hot water tank; cold water in the cold water tank enters the interstage cooler for cooling after being applied pressure by means of a cold water delivery pump, and the water out of the interstage cooler enters the hot water tank to be used as a heat source for the lithium bromide refrigeration unit.
According to the compressed air-gas reheat type combined cycle power generating system, the gas power generating module includes a gas turbine, a gas turbine compressor, a gas power generator, and a burner, where the gas turbine, the gas turbine compressor, and the gas power generator are arranged in a coaxial way; air of the burner comes from atmosphere, and the exhausted air of the turbine enters the gas-to-gas heat exchanger to heat the compressed air out of the air storage device.
According to the compressed air-gas reheat type combined cycle power generating system, the high-pressure air turbine power generating module includes a high-pressure air turbine and an air power generator, and the low-pressure air turbine power generating module includes a low-pressure air turbine and a generator; the high-pressure air turbine and the low-pressure air turbine are arranged in a coaxial way or in a non-coaxial way; an outlet of the air storage device is connected to the high-pressure air turbine through the gas-to-gas heat exchanger module; an exhaust port of the high-pressure air turbine is connected to the low-pressure air turbine through the air reheater; and an exhaust port of the low-pressure air turbine is connected to the exhaust stack.
According to the compressed air-gas reheat type combined cycle power generating system, a heat transfer medium inlet of the air reheater is connected to an exhaust port of the gas-to-gas heat exchanger.
Beneficial effects:
The present invention uses a compressed air-gas reheat type combined cycle power generating system, mainly including a compressed air energy storage module, a heat medium water module, a lithium bromide refrigeration module, a gas power generating module, an air turbine power generating module, a gas-to-gas heat exchanger module, an air reheater, and accessory parts such as a valve. During the nighttime power consuming valleys of the power grid, a compressor module is driven to store air in an air storage device by drawing power from the power grid, and cycled heat medium water is used to perform heat exchange and heat storage, and is used as a heat source for a lithium bromide refrigeration unit. During the power consuming peaks of the power grid such as the daytime, the gas turbine module is used to generate power, and exhaust air produced after the gas turbine does work is used to heat compressed air exhausted from the air storage device in the gas-to-gas heat exchanger module, so that the compressed air becomes gas with high temperature and high pressure which and has a capability of doing work through expansion, thereby entering the air turbine to generate power.
FIG.1 is a schematic diagram of a system of the present invention.
In the drawing: 1. air storage device; 2. air energy storage compressor; 3. cooler; 4. lithium bromide refrigeration unit; 5. cold water tank; 6. hot water tank; 7. gas turbine; 8. gas turbine compressor; 9. gas power generator; 10. burner; 12. air power generator; 11-1. high-pressure air turbine; 11-2. low-pressure air turbine; 13. gas-to-gas heat exchanger; and 14. air reheater.
Example 1:
As shown in FIG.1: a compressed air-gas reheat type combined cycle power generating system of the present example includes a compressed air energy storage module, a lithium bromide refrigeration module, a gas power generating module, a high-pressure air turbine power generating module, a low-pressure air turbine power generating module, an air reheater 14, and a gas-to-gas heat exchanger module, where the compressed air energy storage module is connected to an air storage device 1; the lithium bromide refrigeration module is connected to the compressed air energy storage module to cool compression heat; gas turbine exhausted air of the gas power generating module is connected to the gas-to-gas heat exchanger module and the reheater module to heat compressed air out of the air storage device and compressed air entering the reheater; the high-pressure air turbine power generating module is connected to the gas-to-gas heat exchanger module so as to use the heated compressed air to do work for power generation; an exhaust system of the high-pressure air turbine power generating module is connected to the low-pressure air turbine power generating module through the air reheater to do work for power generation; and an exhaust system of the low-pressure air turbine power generating module is connected to an exhaust stack.
According to the compressed air-gas reheat type combined cycle compressed air energy storage power generating system, the compressed air energy storage module includes 2 to 4 segments of series air energy storage compressors 2, and a cooler 3 is arranged between the stages of the series compressors to cool the compression heat, where inlet air of a low-pressure segment compressor 5 comes from atmosphere.
According to the compressed air-gas reheat type combined cycle compressed air energy storage power generating system, the flow of the compressed air in the compression energy storage process is more than two hundred thousand m’/h, and the compression time lasts 6 to 8 hours; interstage refrigeration uses cycled heat medium water for cooling, and the compressed air at an outlet of a compressor at the tail end enters the air storage device for storage with a pressure of 6 to 10 MPa and a temperature of no higher than 50°C.
According to the compressed air-gas reheat type combined cycle compressed air energy storage power generating system, the lithium bromide refrigeration module includes a lithium bromide refrigeration unit 4, a cold water tank 5, and a hot water tank 6; cold water in the cold water tank, after being applied pressure by means of a cold water delivery pump, enters the interstage cooler for cooling the air at outlets of the compressors at different segments, and the cold water after being heated to hot water with a temperature of 75 to 95°C is stored in the hot water tank to be used as a heat source for the lithium bromide refrigeration unit; during refrigeration, the hot water is sent into the lithium bromide refrigeration unit by means of a hot water delivery pump; and after releasing heat from the lithium bromide refrigeration unit, the heat medium water enters the cold water tank to be stored for future use.
According to the compressed air-gas reheat type combined cycle compressed air energy storage power generating system, the gas power generating module includes a gas turbine 7, a gas turbine compressor 8, a gas power generator 9, and a burner 10, where the gas turbine, the compressor, and the gas power generator are arranged in a coaxial way; inlet air of the gas turbine compressor comes from atmosphere with a flow of 800 to 2000 t/h; outlet pressure of the gas turbine compressor is 1.0 to 3.0 MPa with a temperature of 300 to 400°C; the flow of afterburning natural gas in a combustion chamber is 10 to 30 t/h, and the gas temperature at the combustion chamber outlet is 1000 to 1500°C; the gas turbine outputs work of 50 to 300 MW; pressure of the exhausted air of the turbine is slightly higher than atmospheric pressure and the temperature of the exhausted air is 500 to 650°C; the exhausted air of the gas turbine enters the gas-to-gas heat exchanger module and the air reheater to heat the compressed air out of the air storage device and the high-pressure air turbine.
According to the compressed air-gas reheat type combined cycle power generating system, the high-pressure air turbine power generating module includes a high-pressure air turbine 11-1 and an air power generator 12, and the low-pressure air turbine power generating module includes a low-pressure air turbine 11-2 and a generator 12; the high-pressure air turbine and the low-pressure air turbine are arranged in a coaxial way or in a non-coaxial way; an outlet of the air storage device is connected to the high-pressure air turbine through the gas-to-gas heat exchanger module; an exhaust port of the high-pressure air turbine is connected to the low-pressure air turbine through the air reheater; and an exhaust port of the low-pressure air turbine is connected to the exhaust stack.
Air form the outlet of the air storage device to the air turbine has a flow of 600 to 1800 t/h, a pressure of 6 to 14 MPa, and a temperature of 30 to 50°C, and enters the high-pressure air turbine cylinder to do work when the temperature rises to 300 to 550°C through the 3 to 5 stages of gas-to-gas heat exchanger absorbing heat of the turbine exhausted air; the high-temperature and high-pressure air, after the pressure thereof decreases to 0.8 to 2.2 MPa, and the temperature thereof decreases to 100 to 200°C, enters the air reheater for heat absorption so that the temperature increases to 300 to 550°C, then enters the low-pressure air turbine cylinder to continue to do work through expansion, and is emitted into atmosphere when the pressure thereof decreases to slightly above the atmospheric pressure, and the temperature thereof decreases to below 100°C. Generating power of the air turbine may be 100 to 300 MW.
The technical means disclosed in the solutions of the present invention is not limited to the technical means disclosed in the above technical means, and further includes technical solutions composed of equivalent replacement of the above technical features. The unmentioned matters of the present invention are common general knowledge of those skilled in the art.
Claims (6)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110558955.9A CN113202582B (en) | 2021-05-21 | 2021-05-21 | Compressed air-fuel gas reheating type combined cycle power generation system and method |
| CN202121102425.5U CN214944467U (en) | 2021-05-21 | 2021-05-21 | Compressed air-gas reheating type combined cycle power generation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NL2031463A NL2031463A (en) | 2022-12-06 |
| NL2031463B1 true NL2031463B1 (en) | 2024-01-04 |
Family
ID=84327853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL2031463A NL2031463B1 (en) | 2021-05-21 | 2022-03-31 | Compressed Air-Gas Reheat Type Combined Cycle Power Generating System |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL2031463B1 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH696979A5 (en) * | 2003-11-04 | 2008-02-29 | Alstom Technology Ltd | Power unit with gas turbine and compressed air store has stored fluid heat supply unit upstream from the pressure release device |
| CN203892021U (en) * | 2014-04-02 | 2014-10-22 | 华北电力大学 | Compressed air energy storage system for integrated absorption type refrigeration |
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2022
- 2022-03-31 NL NL2031463A patent/NL2031463B1/en active
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| Publication number | Publication date |
|---|---|
| NL2031463A (en) | 2022-12-06 |
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