CN218093168U - Compressed steam energy storage power generation system - Google Patents
Compressed steam energy storage power generation system Download PDFInfo
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- CN218093168U CN218093168U CN202221095772.4U CN202221095772U CN218093168U CN 218093168 U CN218093168 U CN 218093168U CN 202221095772 U CN202221095772 U CN 202221095772U CN 218093168 U CN218093168 U CN 218093168U
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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
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- 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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Abstract
A compressed steam energy storage power generation system comprises a low-pressure water receiver, a double-medium heat exchanger, a compressor and steam turbine integrated unit, a motor and generator integrated machine, a high-temperature water receiver and a working medium. The low-pressure water receiver is communicated with one end of an internal medium channel of the double-medium heat exchanger through a pipeline; the other end of the medium channel in the double-medium heat exchanger is communicated with the low-pressure end of the compressor and turbine integrated unit through a pipeline; the high-pressure end of the compressor and turbine integrated unit is communicated with the high-temperature water storage device through a pipeline; the compressor and steam turbine integrated unit and the motor and generator integrated unit are electrically connected. The invention can fully utilize heat sources from coal, natural gas, photo-thermal, nuclear energy and the like, realize optimal matching, realize energy storage and release and flexibly carry out peak shifting and valley filling.
Description
Technical Field
The utility model relates to a new forms of energy technical field, concretely relates to compressed steam energy storage power generation system.
Background
With the increasing emphasis on energy conservation and emission reduction, the energy storage technology is rapidly developed as an important means for smoothing the fluctuation of renewable energy, realizing the peak-load modulation and frequency modulation of the traditional power system and improving the grid-connected flexibility of the renewable energy. At present, the traditional energy storage technology comprises pumped storage, compressed air energy storage and electrochemical energy storage, wherein the pumped storage technology is limited by geographical conditions and must have geographical conditions suitable for building upper and lower reservoirs; compressed air is used for storing energy, so that the energy storage efficiency is low and the energy density is low; electrochemical energy storage and the like have the limitations of scale and the like.
The water vapor heat storage is a high-temperature and high-pressure heat storage technology, and heat energy is stored in a high-pressure steam form.
Disclosure of Invention
The utility model provides a not enough to prior art, the utility model provides a compression steam energy storage power generation system to solve the above-mentioned one or more technical problem who exists, the utility model discloses can the current waste heat resource of make full use of, realize optimum cooperation, realize multistage energy storage and release, move the peak in a flexible way and fill a valley.
In order to realize the technical scheme, the utility model provides a compressed steam energy storage power generation system, which comprises an energy storage system and an acting system;
the energy storage system mainly comprises a low-pressure water receiver, a double-medium heat exchanger, a compressor set, a motor and a high-temperature water receiver; the low-pressure water receiver is communicated with one end of an internal medium channel of the double-medium heat exchanger through a pipeline; the other end of the medium channel in the double-medium heat exchanger is communicated with a medium inlet of the compressor unit through a pipeline; the medium outlet of the compressor unit is communicated with the high-temperature water storage device through a pipeline;
the work doing system mainly comprises a low-pressure water storage device, a double-medium heat exchanger, a steam turbine set, a generator and a high-temperature water storage device; the medium inlet of the steam turbine set is communicated with the high-temperature water storage device through a pipeline; the medium outlet of the steam turbine set is communicated with one end of the medium channel in the double-medium heat exchanger through a pipeline; the other end of the internal medium channel of the double-medium heat exchanger is communicated with the low-pressure water receiver through a pipeline;
the steam turbine set and the compressor set share one compressor and steam turbine integrated machine; the generator and the motor share one motor and generator integrated machine;
therefore, the energy storage system and the work doing system share one set of system.
Further, the device also comprises a working medium, wherein the working medium is treated deionized purified water.
Further, the compressor and the steam turbine integrated machine and the motor and the generator integrated machine are electrically connected.
Further, when a compressor unit of the compressor and steam turbine integrated unit works, a motor of the motor and generator integrated unit works to provide working electric energy for the compressor unit; when the steam turbine unit of the compressor and steam turbine integrated unit works, the generator of the motor and generator integrated unit works.
Further, the system also comprises a constant-temperature heat reservoir and a circulating pump; the circulating pump is arranged between the outlet of the constant-temperature heat reservoir and the inlet of the external medium channel of the double-medium heat exchanger; and an outlet of an external medium channel of the double-medium heat exchanger is communicated with an inlet of the constant-temperature heat reservoir through a pipeline.
Further, the high-temperature water storage device is a sealed heat-preservation container specially made of steel; the low-pressure water reservoir is a sealed heat-insulating container.
Furthermore, when the compressor unit of the compressor and turbine integrated unit works in a mode, multi-stage compression is carried out, and critical compression, namely saturated compression or two-phase compression, is selected preferentially.
Further, the device also comprises a first valve and a second valve; the inlet of the first valve is communicated with the compressor and turbine integrated unit, and the outlet of the first valve is communicated with the bottom end of the high-temperature water storage device; and the inlet of the second valve is communicated with the upper part of the high-temperature water storage device, and the outlet of the second valve is communicated with the compressor and turbine integrated unit.
Compared with the prior art, the utility model has the advantages of it is following: the utility model discloses compressed steam energy storage power generation system adopts as compressed steam as the circulating medium, combines phase transition heat transfer technique, can reduce the heat transfer difference in temperature, improves energy storage efficiency, is a high-efficient energy storage system that integrates sensible heat energy storage and latent heat energy storage; in addition, the system fully utilizes heat sources such as coal, natural gas, photo-thermal energy, nuclear energy and the like to realize optimal matching, has the advantages of large scale, high efficiency, low cost, environmental protection and the like, can convert unstable electric energy generated by renewable energy sources into stable and controllable high-quality electric energy, effectively solves the problems of wind abandonment and light abandonment, and realizes large-scale consumption of renewable energy power generation. Meanwhile, energy storage services such as power peak regulation, frequency modulation, phase modulation, voltage support, rotary standby, emergency response and the like can be realized, and the efficiency, stability and safety of a power system are improved.
Drawings
Fig. 1 is a schematic structural view of the compressed steam energy storage power generation of the present invention.
Fig. 2 is a schematic structural diagram of a first embodiment of the compressed steam energy storage power generation system.
Fig. 3 is a schematic structural view of a second embodiment of the compressed steam energy storage power generation system of the present invention.
Fig. 4 is a schematic structural view of a third embodiment of the compressed steam energy storage power generation device of the present invention.
Fig. 5 is a schematic structural view of a fourth embodiment of the compressed steam energy storage power generation device of the present invention.
In the figure: 1. a low pressure water reservoir; 2. a dual medium heat exchanger; 21. a first heat exchanger; 22. a second heat exchanger; 3. the compressor and the steam turbine integrated unit; 31. a steam turbine unit; 32. a compressor unit; 4. the motor and generator integrated unit; 41. a generator set; 42. a motor unit; 5. a high temperature water reservoir; 6. a thermostatic heat reservoir. 7. A circulation pump; 8. a first valve; 9. a second valve; 10. a third valve; 11. and a fourth valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art without making any creative effort fall within the protection scope of the present invention.
Detailed description of the invention
Referring to fig. 1, the utility model discloses compressed steam energy storage power generation system, including low pressure water receiver 1, two medium heat exchangers 2, compressor and integrative unit 3 of steam turbine, motor and generator all-in-one 4, high temperature water receiver 5 and working medium. The compressor and steam turbine integrated unit 3 is formed by connecting at least two groups of compressor and steam turbine integrated units in series; the low-pressure water receiver 1 is communicated with one end of an internal medium channel of the double-medium heat exchanger 2 through a pipeline; the other end of the medium channel in the double-medium heat exchanger 2 is communicated with the low-pressure end of the compressor and turbine integrated unit 3 through a pipeline; the high-pressure end of the compressor and steam turbine integrated unit 3 is communicated with the high-temperature water storage 5 through a pipeline; the compressor and steam turbine integrated unit 3 and the motor and generator integrated machine 4 are electrically connected; when a compressor unit of the compressor and steam turbine integrated unit 3 works, a motor of the motor and generator integrated unit 4 works to provide working electric energy for the compressor unit, and the energy consumed by the motor is surplus electric energy of a power grid in a low-peak electricity utilization period or electric energy generated by renewable energy; when the turbine unit of the compressor and turbine integrated unit 3 operates, the generator of the motor and generator integrated unit 4 operates. The working medium is treated deionized purified water.
Referring to fig. 2, on the basis of the structure shown in fig. 1, the double-medium heat exchanger 2 of the compressed steam energy storage power generation system of the present invention is a liquid-liquid heat exchanger, and an external heat exchange channel thereof is communicated with the constant temperature heat reservoir 6; a circulating pump 7 is connected between the outlet of the constant-temperature heat reservoir 6 and the inlet of the external medium channel of the double-medium heat exchanger 2; and an outlet of an external medium channel of the double-medium heat exchanger 2 is communicated with an inlet of the constant temperature heat reservoir 6 through a pipeline.
The low-pressure water reservoir is a sealed heat-insulating container.
The high-temperature water storage device is a sealed heat-insulating container specially made of steel.
And when the compressor unit of the compressor and steam turbine integrated unit 3 works, multi-stage critical compression, namely saturated compression or two-phase compression is carried out.
Based on above the utility model discloses compressed steam energy storage power generation system includes two kinds of duty cycle modes, is energy storage mode and acting mode respectively.
When the energy storage working mode of the utility model works, the compressor unit of the compressor and steam turbine integrated unit 3 works, and the motor of the motor and generator integrated unit 4 works; under the driving of the compressor and steam turbine integrated unit 3, the low-temperature and low-pressure water medium in the low-pressure water receiver 1 enters the internal circulation channel of the double-medium heat exchanger 2 to exchange heat with the medium of the external circulation channel of the double-medium heat exchanger 2, the low-temperature and low-pressure water absorbs heat to vaporize, then enters the compressor and steam turbine integrated unit 3 to be compressed in multiple stages, finally, the high-temperature and high-pressure saturated steam is compressed, and the high-temperature and high-pressure saturated steam is sent into the high-temperature water receiver 5 from the bottom of the high-temperature water receiver 5, so that the energy storage working mode is completed.
When the working mode of the utility model works, the expansion unit of the compressor and steam turbine integrated unit 3 works, and the generator of the motor and generator integrated unit 4 works; an outlet valve of the high-temperature water storage device 5 is opened, high-temperature and high-pressure saturated steam is directly sprayed out from the high-temperature water storage device 5 to push an expansion unit of the compressor and turbine integrated unit 3 to do work step by step, and energy generated by the work done by each stage of turbine of the compressor and turbine integrated unit 3 is output as electric energy through a generator of the motor and generator integrated unit 4 to supplement power supply of a power grid in a peak period; become water and vapor mixed state of low pressure high temperature after the high saturated steam of high temperature does work, then the water and vapor mixed state of low pressure high temperature gets into the medium of the interior circulation passageway of two medium heat exchanger 2 and two medium heat exchanger 2 outer circulation passageways and carries out the heat exchange, and the water and vapor mixed state of low pressure high temperature release heat become low pressure microthermal water, is sent into low pressure water receiver 1 at last for the working medium of energy storage mode during operation.
In the energy storage working mode and the working mode, the medium of the external circulation channel of the double-medium heat exchanger 2 is extracted from the constant-temperature heat reservoir 6 through the circulating pump 7, and then is sent into the external circulation channel of the double-medium heat exchanger 2 to exchange heat with the deionized purified water of the internal circulation channel of the double-medium heat exchanger 2; when the energy storage working mode works, the constant temperature heat reservoir 6 is used as a high temperature heat source to heat deionized purified water of a circulation channel in the double-medium heat exchanger 2; when the work-doing work mode works, the constant-temperature heat reservoir 6 is used as a low-temperature heat source and absorbs heat of deionized purified water and water vapor in the circulation channel in the double-medium heat exchanger 2.
Detailed description of the invention
Referring to fig. 3, compared with the first embodiment, there are two more valves, namely, a first valve 8 and a second valve 9; the inlet of the first valve 8 is communicated with the compressor and steam turbine integrated unit 3, and the outlet of the first valve is communicated with the bottom end of the high-temperature water storage device 5, so that high-temperature and high-pressure saturated steam which is subjected to multistage compression by the compressor and steam turbine integrated unit 3 is sent into the high-temperature water storage device 5 from the bottom of the high-temperature water storage device 5, forms convection with the medium inside the high-temperature water storage device 5, and can be fully mixed in the high-temperature water storage device 5. The inlet of the second valve 9 is communicated with the top of the high-temperature water storage 5, and the outlet thereof is communicated with the compressor and turbine integrated unit 3. The rest of the process is the same as the first embodiment, and the working method is also the same.
The first valve 8 and the second valve 9 are one-way valves or solenoid valves.
Detailed description of the invention
Referring to fig. 4, the compressed steam energy storage power generation system of the present invention comprises a low pressure water storage device 1, a dual medium heat exchanger 2, a compressor unit 32, a motor 42, a turbine unit 31, a generator 41, a high temperature water storage device 5, a working medium and related connected pipelines. The turbine set 31 is formed by connecting at least two groups of turbines in series; the compressor unit 32 is formed by connecting at least two groups of compressors in series; the low-pressure water receiver 1 is communicated with one end of an internal medium channel of the double-medium heat exchanger 2 through a pipeline; the other end of the medium channel in the double-medium heat exchanger 2 is respectively communicated with the outlet of the steam turbine unit 31 and the inlet of the compressor unit 32 through pipelines; the inlet of the turboset 31 is communicated with the upper end of the high-temperature water storage device 5 through a pipeline; the outlet of the compressor unit 32 is shown in communication with the top of the high temperature reservoir 5 via a conduit.
Further, a third valve 10 is communicated between the double-medium heat exchanger 2 and the steam turbine unit 31; a fourth valve is communicated between the double-medium heat exchanger 2 and the compressor unit 32.
The third valve 10 and the fourth valve 11 are respectively a one-way valve or a solenoid valve.
The turbine unit 31 is electrically connected with a generator 41; the compressor package 32 is electrically connected to a motor 42.
It is above the utility model discloses compressed steam energy storage power generation system includes two kinds of duty cycle modes, is energy storage mode and acting mode respectively.
The utility model discloses energy storage mode during operation, under compressor unit 32 extraction pressure drives, the low temperature low pressure water medium among the low pressure water receiver 1 gets into the medium of the internal circulation passageway of two medium heat exchangers 2 and two medium heat exchangers 2 outer circulation passageways and carries out the heat exchange, low temperature low pressure water absorbs the heat vaporization, then in getting into compressor unit 32, carry out multi-stage compression, the last compression is the highly compressed saturated steam of high temperature, the highly compressed saturated steam of high temperature is sent into high temperature water receiver 5 from the bottom of high temperature water receiver 5, energy storage mode has just so been accomplished.
When the working mode of the utility model works, the outlet valve of the high-temperature water storage device 5 is opened, the high-temperature and high-pressure saturated steam is directly ejected from the high-temperature water storage device 5 to push the steam turbine set 31 to do work step by step, and the energy generated by the work done by each stage of steam turbine of the steam turbine set 31 is output in the form of electric energy through the generator 41 and is used for supplementing the power supply of the power grid at the peak period; become water and vapor mixed state of low pressure high temperature after the high saturated steam of high temperature does work, then the water and vapor mixed state of low pressure high temperature gets into the medium of the interior circulation passageway of two medium heat exchanger 2 and two medium heat exchanger 2 outer circulation passageways and carries out the heat exchange, and the water and vapor mixed state of low pressure high temperature release heat become low pressure microthermal water, is sent into low pressure water receiver 1 at last for the working medium of energy storage mode during operation.
In the energy storage working mode and the working mode, the medium of the external circulation channel of the double-medium heat exchanger 2 is pumped from the constant-temperature heat reservoir 6 through the circulating pump 7 and then sent into the external circulation channel of the double-medium heat exchanger 2 to exchange heat with the deionized purified water of the internal circulation channel of the double-medium heat exchanger 2; when the energy storage working mode works, the constant temperature heat reservoir 6 is used as a high temperature heat source to heat deionized purified water of a circulation channel in the double-medium heat exchanger 2; when the working mode of work is in operation, the constant-temperature heat reservoir 6 is used as a low-temperature heat source to absorb the heat of deionized purified water and water vapor in the internal circulation channel of the double-medium heat exchanger 2.
The rest of the process is the same as the first embodiment and the working method is the same.
Detailed description of the invention
Referring to fig. 5, compared with the embodiment, the energy storage working mode and the work working mode of the compressed steam energy storage power generation system of the present invention do not share one dual-medium heat exchanger 2, but use the second heat exchanger 22 and the first heat exchanger 21 respectively; the first heat exchanger 21 is installed between the low temperature water reservoir 1 and the turbine set 31; the second heat exchanger 22 is installed between the low temperature water storage tank 1 and the compressor set 32, and the rest is the same as the embodiment and the operation method is the same.
It should be noted that, in the foregoing embodiments of the present application, descriptions of the respective embodiments are focused on, and for parts that are not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.
The foregoing is only a preferred embodiment of the present application and it should be noted that, as will be apparent to those skilled in the art, numerous modifications and adaptations can be made without departing from the principles of the present application and such modifications and adaptations are intended to be considered within the scope of the present application.
Claims (8)
1. A compressed steam energy storage power generation system is characterized in that: the system comprises an energy storage system and a work doing system;
the energy storage system mainly comprises a low-pressure water receiver, a double-medium heat exchanger, a compressor set, a motor and a high-temperature water receiver; the low-pressure water receiver is communicated with one end of an internal medium channel of the double-medium heat exchanger through a pipeline; the other end of the medium channel in the double-medium heat exchanger is communicated with a medium inlet of the compressor unit through a pipeline; the medium outlet of the compressor unit is communicated with the high-temperature water storage device through a pipeline;
the work doing system mainly comprises a low-pressure water storage device, a double-medium heat exchanger, a steam turbine set, a generator and a high-temperature water storage device; the medium inlet of the steam turbine set is communicated with the high-temperature water storage device through a pipeline; the medium outlet of the steam turbine set is communicated with one end of the medium channel in the double-medium heat exchanger through a pipeline; the other end of the internal medium channel of the double-medium heat exchanger is communicated with the low-pressure water receiver through a pipeline;
the steam turbine set and the compressor set share one compressor and steam turbine integrated set; the generator and the motor share one motor and generator integrated machine;
therefore, the energy storage system and the work doing system share one set of system.
2. A compressed steam energy storage and generation system according to claim 1, wherein: the device also comprises a working medium which is treated deionized purified water.
3. A compressed steam energy storage and generation system according to claim 1, wherein: the compressor and steam turbine integrated unit and the motor and generator integrated unit are electrically connected.
4. A compressed steam energy storage and generation system according to claim 3, wherein: when a compressor unit of the compressor and steam turbine integrated unit works, the motor of the motor and generator integrated unit works to provide working electric energy for the compressor unit; when the steam turbine unit of the compressor and steam turbine integrated unit works, the generator of the motor and generator integrated unit works.
5. A compressed steam energy storage and generation system according to claim 1, wherein: the system also comprises a constant-temperature heat reservoir and a circulating pump; the circulating pump is arranged between the outlet of the constant-temperature heat reservoir and the inlet of the external medium channel of the double-medium heat exchanger; and an outlet of an external medium channel of the double-medium heat exchanger is communicated with an inlet of the constant-temperature heat reservoir through a pipeline.
6. A compressed steam energy storage and generation system according to claim 1, wherein: the high-temperature water storage device is a sealed heat-insulating container specially made of steel; the low-pressure water storage device is a sealed heat-preservation container.
7. A compressed steam energy storage and generation system according to claim 4, wherein: and when the compressor unit of the compressor and steam turbine integrated unit works, multistage compression is carried out, and critical compression, namely saturated compression or two-phase compression, is preferentially selected.
8. A compressed steam energy storage and generation system according to claim 1, wherein: the device also comprises a first valve and a second valve; the inlet of the first valve is communicated with the compressor and turbine integrated unit, and the outlet of the first valve is communicated with the bottom end of the high-temperature water storage device; and the inlet of the second valve is communicated with the upper part of the high-temperature water storage device, and the outlet of the second valve is communicated with the compressor and turbine integrated unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221095772.4U CN218093168U (en) | 2022-05-09 | 2022-05-09 | Compressed steam energy storage power generation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221095772.4U CN218093168U (en) | 2022-05-09 | 2022-05-09 | Compressed steam energy storage power generation system |
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| CN218093168U true CN218093168U (en) | 2022-12-20 |
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| CN202221095772.4U Active CN218093168U (en) | 2022-05-09 | 2022-05-09 | Compressed steam energy storage power generation system |
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