CN218509589U - System-storage-use integrated hydrogen energy storage system based on electricity-hydrogen-gas conversion - Google Patents
System-storage-use integrated hydrogen energy storage system based on electricity-hydrogen-gas conversion Download PDFInfo
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- CN218509589U CN218509589U CN202222453867.5U CN202222453867U CN218509589U CN 218509589 U CN218509589 U CN 218509589U CN 202222453867 U CN202222453867 U CN 202222453867U CN 218509589 U CN218509589 U CN 218509589U
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The utility model belongs to the technical field of compressed hydrogen energy storage, concretely relates to system-storage-with integrative hydrogen energy storage system based on electricity-hydrogen-gas conversion. The method comprises the following steps: the hydrogen production device is an electrolytic tank; the hydrogen fuel cell is connected with the hydrogen production device; the compression device is connected with the hydrogen production device; a hydrogen storage device connected with the compression device; the heat storage device is respectively connected with the hydrogen production device, the hydrogen fuel cell and the compression device; the expansion device is respectively connected with the heat storage device, the hydrogen storage device and the generator; the expansion device is connected with the hydrogen fuel cell; the power grid is respectively connected with the hydrogen fuel cell, the generator and the hydrogen production device; and the low-temperature storage tank is used for storing cold water generated by heat exchange with the compression device and the expansion device. The system of the utility model realizes the integration of electricity-hydrogen-gas conversion and production-storage-use, and fully utilizes resources.
Description
Technical Field
The application relates to the technical field of compressed hydrogen energy storage, in particular to a hydrogen energy storage system integrating production, storage and utilization based on electricity-hydrogen-gas conversion.
Background
The description of the background art of the present invention pertains to the related art related to the present invention, and is merely for the purpose of illustrating and facilitating understanding the contents of the present invention, and is not to be construed as a prior art which is definitely or supposedly considered by the applicant to be the present invention on the filing date of the first filed application.
The total electric quantity of the abandoned wind and the abandoned light in China is about 216.8 multiplied by 108 kw.h in 2020, and the power consumption of the hydrogen production by the electrolyzed water is 5 kw.h/m 3 By calculation, about 39.3 million tons of hydrogen can be produced by abandoning electricity of renewable energy sources in China in 2020. Hydrogen energy is a secondary energy source with rich sources, green, low carbon and wide application, and is gradually becoming one of important carriers for transformation development of global energy. The hydrogen energy storage is a novel energy storage, can improve the renewable energy consumption ability, and possesses the ability of long term energy storage of crossing season, crossing region, can play an important role in novel power system construction.
However, the current hydrogen energy storage is utilized only singly, and the waste of resources is caused.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a system-storage-with integrative hydrogen energy storage system based on electricity-hydrogen-gas conversion, the utility model discloses a system has realized electricity-hydrogen-gas conversion and system-storage-with integration, make full use of resource.
A system-storage-use integrated hydrogen energy storage system based on electricity-hydrogen-gas conversion, comprising:
the hydrogen production device is an electrolytic bath which outputs hydrogen, oxygen and first heat through water electrolysis;
the hydrogen fuel cell is connected with the hydrogen production device, the hydrogen production device provides oxygen for the hydrogen fuel cell, and water generated by the hydrogen fuel cell is conveyed to the hydrogen production device;
the compression device is connected with the hydrogen production device and compresses the hydrogen produced by the hydrogen production device;
the hydrogen storage device is connected with the compression device and is used for storing the hydrogen compressed by the compression device; the hydrogen storage device is an underground gas storage, a metal liner fiber winding bottle, a plastic liner fiber winding bottle or a carbon fiber winding gas bottle;
the heat storage device is respectively connected with the hydrogen production device, the hydrogen fuel cell and the compression device and is used for storing first heat generated by the hydrogen production device, second heat generated by the hydrogen fuel cell and third heat generated by the compression device;
the expansion device is respectively connected with the heat storage device, the hydrogen storage device and the generator, and the heat storage device provides energy to heat the hydrogen conveyed from the hydrogen storage device and provide power for the generator; the expansion device is connected with the hydrogen fuel cell and provides hydrogen for the hydrogen fuel cell;
the power grid is respectively connected with the hydrogen fuel cell, the generator and the hydrogen production device and is used for receiving the electric energy generated by the hydrogen fuel cell and the generator and providing the electric energy for the hydrogen production device;
and the low-temperature storage tank is used for storing cold water generated by heat exchange with the compression device and the expansion device.
Furthermore, the power grid is connected with a renewable energy power generation device.
Furthermore, the motor of the compression device is powered by a power grid.
Furthermore, a compressor adopted by the compression device adopts 3 stages of compression, a heat exchanger is arranged between stages, and water is used as a heat exchange medium.
Furthermore, the expansion device adopts an expansion machine which is a 3-stage turbine, a reheater is arranged between the expansion machines, and water is used as a heat exchange medium.
Furthermore, the system also comprises a natural gas pipe network, wherein the natural gas pipe network is connected with the expansion device and used for receiving hydrogen.
The hydrogen energy storage method based on the integration of electricity-hydrogen-gas conversion, preparation and storage is completed by adopting the system.
The embodiment of the utility model provides a following beneficial effect has:
the surplus renewable energy power in the valley period is utilized to electrolyze water to produce hydrogen, and the hydrogen is compressed and stored. During the peak period of power utilization, the stored high-pressure hydrogen pushes the generator to work to generate power and the power is merged into a power grid.
The hydrogen gas at the outlet of the expander can be used with a hydrogen fuel cell to generate electricity. During the peak period of electricity utilization, the hydrogen fuel cell device can use the oxygen and hydrogen generated by the hydrogen production device to burn for generating electricity, and the electricity is merged into a power grid, and the water generated by burning can be input into the hydrogen production device again for electrolyzing water to produce hydrogen. In addition, the hydrogen can be directly mixed into a natural gas pipeline network for natural gas pipeline hydrogen mixing transportation and terminal utilization.
The system of the utility model realizes the integration of electricity-hydrogen-gas conversion and production-storage-use, and fully utilizes resources.
Drawings
Fig. 1 is a schematic structural diagram of a system-storage-use integrated hydrogen energy storage system based on electricity-hydrogen-gas conversion in an embodiment of the present invention.
Detailed Description
The present application is further described below with reference to examples.
In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, in the following description, different "one embodiment" or "an embodiment" means not necessarily the same embodiment. Various embodiments may be replaced or combined, and other embodiments may be obtained according to the embodiments without creative efforts for those skilled in the art.
With reference to fig. 1, a system-storage-use integrated hydrogen energy storage system based on electricity-hydrogen-gas conversion comprises:
the hydrogen production device 1 is an electrolytic cell, and the electrolytic cell outputs hydrogen, oxygen and first heat through electrolyzed water; the surplus electric energy in the area with rich electric power of renewable energy sources is used for driving the electrolytic cell device to electrolyze water to produce hydrogen. The electrolyzer may be an alkaline electrolyzer or a PEM electrolyzer;
the hydrogen fuel cell 2, the said hydrogen fuel cell 2 is connected with said hydrogen producing device 1, the said hydrogen producing device 1 provides oxygen for the said hydrogen fuel cell 2, the water that the said hydrogen fuel cell 2 produces is transported to the said hydrogen producing device 1;
the compression device 3 is connected with the hydrogen production device 1 and compresses the hydrogen produced by the hydrogen production device 1; the electric energy of the power grid is utilized to drive the motor, and the motor drives the compressor to compress hydrogen. The compressor is set to 3-stage compression, the interstage is provided with a heat exchanger, water is used as a heat exchange medium, heat generated in the process of compressing hydrogen is obtained, and the heat is stored in the heat accumulator;
the hydrogen storage device 4 is connected with the compression device 3 and is used for storing the hydrogen compressed by the compression device; high-pressure gaseous hydrogen storage is adopted. And storing the high-pressure hydrogen pressurized by the compressor in a high-pressure gas storage cylinder. The hydrogen storage device can be an underground gas storage, a metal liner fiber winding bottle, a plastic liner fiber winding bottle and a carbon fiber winding gas cylinder;
the heat storage device 5 is respectively connected with the hydrogen production device 1, the hydrogen fuel cell 2 and the compression device 3, and is used for storing the first heat generated by the hydrogen production device 1, the second heat generated by the hydrogen fuel cell 2 and the third heat generated by the compression device 3;
the expansion device 6 is respectively connected with the heat storage device 5, the hydrogen storage device 4 and the generator 8, and the heat storage device 5 provides energy to heat the hydrogen conveyed from the hydrogen storage device 4 and provide power for the generator 8;
the power grid is respectively connected with the hydrogen fuel cell 2, the generator 8 and the hydrogen production device 1 and is used for receiving the electric energy generated by the hydrogen fuel cell 2 and the generator 8 and providing the electric energy for the hydrogen production device 1;
and the low-temperature storage tank 7 is used for storing cold water generated by heat exchange with the compression device 3 and the expansion device 6.
The surplus renewable energy power in the valley period is utilized to electrolyze water to produce hydrogen, and the hydrogen is compressed and stored. During the peak period of power consumption, the stored high-pressure hydrogen pushes the generator to work to generate power and the power is merged into a power grid.
The hydrogen at the outlet of the expander can be used with a hydrogen fuel cell to generate electricity. During the peak period of electricity utilization, the hydrogen fuel cell device can use the oxygen and hydrogen generated by the hydrogen production device to burn for generating electricity, and the electricity is merged into a power grid, and the water generated by burning can be input into the hydrogen production device again for electrolyzing water to produce hydrogen. In addition, hydrogen can be directly mixed into a natural gas pipeline network for natural gas pipeline hydrogen mixing transportation and terminal utilization.
Realizes the integration of electricity-hydrogen-gas conversion and preparation-storage-use, and fully utilizes resources.
In some embodiments of the present invention, the power grid is connected to a renewable energy power generation device 10.
In some embodiments of the present invention, the motor 9 of the compressing device 3 is powered by the power grid.
In some embodiments of the present invention, the compressor adopted by the compression device 3 is a 3-stage compression, and the interstage heat exchanger (intercooler 31 and cooler 32) is provided to use water as a heat exchange medium.
In some embodiments of the present invention, the expansion device 6 employs an expansion machine that is a 3-stage turbine, and a reheater 61 is disposed between the expansion machines, and water is used as a heat exchange medium. The expansion device 6 is connected with the hydrogen fuel cell 2 and provides hydrogen for the hydrogen fuel cell 2; high-pressure hydrogen in the gas storage device is released, and because the temperature of the hydrogen in the hydrogen storage device is too low, hot water is used as a medium, heat in the heat reservoir is used for heating the high-pressure hydrogen entering the expansion machine, and work is done in the expansion machine to drive the generator to generate electricity. The expansion machine is a 3-stage turbine, a reheater is arranged between the expansion machines, water is used as a heat exchange medium, and cold water after heat exchange is stored in the low-temperature storage tank.
In some embodiments of the present invention, the system further comprises a natural gas pipeline network, wherein the natural gas pipeline network is connected with the expansion device 6 for receiving hydrogen.
The hydrogen energy storage method based on the integration of electricity-hydrogen-gas conversion, preparation and storage is completed by adopting the system.
The system has the advantages of high safety, small specific investment, large energy storage capacity, high flexibility and the like, can provide powerful support for constructing a novel power system in carbon and in the background, and will become a main energy storage mode in the future.
According to the invention, through the electricity-hydrogen-gas cooperation, all modules can be flexibly combined, the long-period flexible regulation is realized, the full application of renewable energy sources is realized, the rated power can reach 100MW, and the system efficiency can reach more than 70%.
It should be noted that the above embodiments can be freely combined as necessary. The above description is only for the preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A system-storage-use integrated hydrogen energy storage system based on electricity-hydrogen-gas conversion, comprising:
the hydrogen production device is an electrolytic bath which outputs hydrogen, oxygen and first heat through water electrolysis;
the hydrogen fuel cell is connected with the hydrogen production device, the hydrogen production device provides oxygen for the hydrogen fuel cell, and water generated by the hydrogen fuel cell is conveyed to the hydrogen production device;
the compression device is connected with the hydrogen production device and compresses the hydrogen produced by the hydrogen production device;
the hydrogen storage device is connected with the compression device and is used for storing the hydrogen compressed by the compression device; the hydrogen storage device is an underground gas storage, a metal liner fiber winding bottle, a plastic liner fiber winding bottle or a carbon fiber winding gas bottle;
the heat storage device is respectively connected with the hydrogen production device, the hydrogen fuel cell and the compression device and is used for storing first heat generated by the hydrogen production device, second heat generated by the hydrogen fuel cell and third heat generated by the compression device;
the expansion device is respectively connected with the heat storage device, the hydrogen storage device and the generator, and the heat storage device provides energy to heat the hydrogen conveyed from the hydrogen storage device and provide power for the generator; the expansion device is connected with the hydrogen fuel cell and provides hydrogen for the hydrogen fuel cell;
the power grid is respectively connected with the hydrogen fuel cell, the generator and the hydrogen production device and is used for receiving the electric energy generated by the hydrogen fuel cell and the generator and providing the electric energy for the hydrogen production device;
and the low-temperature storage tank is used for storing cold water generated by heat exchange with the compression device and the expansion device.
2. The integrated system for manufacturing-storing-using hydrogen energy storage based on electricity-hydrogen-gas conversion as claimed in claim 1, wherein said power grid is connected with a renewable energy power generation device.
3. The integrated system for manufacturing-storing-and-using hydrogen energy storage based on electricity-hydrogen-gas conversion of claim 1, wherein the motor of said compressing device is powered by the power grid.
4. The integrated system for storing and storing hydrogen based on electricity-hydrogen-gas conversion as claimed in claim 1, wherein the compressor used in the compression device is 3 stages of compression, and a heat exchanger is arranged between the stages, and water is used as the heat exchange medium.
5. The integrated system-storage-and-use hydrogen energy storage system based on electricity-hydrogen-gas conversion as claimed in claim 1, wherein the expansion device adopts a 3-stage turbine as an expander, a reheater is arranged between the expanders, and water is used as a heat exchange medium.
6. The integrated system-storage-and-use hydrogen energy storage system based on electricity-hydrogen-gas conversion according to claim 1, further comprising a natural gas pipeline network connected to the expansion device for receiving hydrogen gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222453867.5U CN218509589U (en) | 2022-09-16 | 2022-09-16 | System-storage-use integrated hydrogen energy storage system based on electricity-hydrogen-gas conversion |
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| CN202222453867.5U CN218509589U (en) | 2022-09-16 | 2022-09-16 | System-storage-use integrated hydrogen energy storage system based on electricity-hydrogen-gas conversion |
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