CN216198322U - High-pressure hydrogen storage energy recovery system - Google Patents
High-pressure hydrogen storage energy recovery system Download PDFInfo
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- CN216198322U CN216198322U CN202122640695.8U CN202122640695U CN216198322U CN 216198322 U CN216198322 U CN 216198322U CN 202122640695 U CN202122640695 U CN 202122640695U CN 216198322 U CN216198322 U CN 216198322U
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Abstract
The utility model discloses a high-pressure hydrogen storage energy recovery system, which is used for utilizing the pressure difference when high-pressure hydrogen is converted into low-pressure hydrogen to do work outwards to realize energy recovery and comprises a high-pressure hydrogen storage tank, a hydrogen expander, a generator and a refrigerant pipeline which are arranged in a matched way, wherein the high-pressure hydrogen storage tank is connected with the hydrogen expander through the high-pressure hydrogen pipeline, the high-pressure hydrogen storage tank is used for conveying the high-pressure hydrogen to the hydrogen expander to drive the hydrogen expander to do work outwards, the hydrogen expander is connected with a refrigerant user through the refrigerant pipeline and transmits the cold energy of the hydrogen to the refrigerant medium while driving the generator to generate electricity, and the cold energy is conveyed to the refrigerant user by the refrigerant medium in the refrigerant pipeline; the gas outlet end of the hydrogen expander is connected with a low-pressure hydrogen user through a low-pressure hydrogen pipeline so as to convey the low-pressure hydrogen after pressure reduction; and the high-pressure hydrogen pipeline is provided with a flow regulating valve for regulating the air input of a hydrogen expander, and the hydrogen expander is a piston expander or a turbine expander.
Description
Technical Field
The utility model relates to the technical field of energy recovery equipment, in particular to a high-pressure hydrogen storage energy recovery system.
Background
The hydrogen energy is a secondary energy source which is wide in source, clean and carbon-free and rich in application scene, is an ideal interconnection medium for promoting clean and efficient utilization of traditional fossil energy and supporting large-scale development of renewable energy, is an optimal choice for realizing large-scale decarburization in the fields of transportation, steel, chemical industry, electric power, buildings and the like, and is also the core of a future world energy architecture. With the aim of carbon peak reaching and carbon neutralization put forward in China, the development and planning of the hydrogen energy industry must be accelerated and optimized continuously. From the development and change of energy structures in China, with the establishment of a carbon neutralization target, the proportion of traditional fossil energy is gradually reduced, and conversely, the proportion of renewable energy such as wind power, photovoltaic and the like is gradually improved. However, the power generation technologies such as wind power and photovoltaic have the defects of power generation instability, discontinuity and the like, and the security of the power grid itself is threatened when the power grid is connected to the wind power and photovoltaic projects on the internet on a large scale, so that more energy storage power stations need to be configured to balance the fluctuation of the power grid. Therefore, the method can consider that power generation projects such as wind power and photovoltaic are configured to produce hydrogen by electrolyzing water, and redundant generated energy is stored in a hydrogen production mode, so that zero carbon emission can be realized, really clean green hydrogen can be obtained, intermittent and unstable renewable energy can be converted and stored into chemical energy, digestion of new energy is promoted, and huge ecological environmental benefit and economic benefit are brought.
At present, the storage mode of hydrogen mainly comprises compressed gas state hydrogen storage, low temperature liquid state hydrogen storage and the like, and the compressed gas state hydrogen storage technology has the advantages of high technical maturity, low initial investment cost, low energy consumption, matching with the current hydrogen energy industry development and the like, and is widely applied at home and abroad. Compression of gaseous hydrogen storage typically requires compression of the hydrogen to pressures of 20MPa or even higher to facilitate high density storage of the hydrogen, a process that requires the consumption of some electrical power for compression of the hydrogen. The hydrogen has wide utilization scenes, can be used as fuel and used for hydrogen fuel cells, hydrogen gas turbines, hydrogen-fired boilers and the like; hydrogen can also be used as a raw material for synthesizing methanol, ammonia and the like; the power plant uses hydrogen as a coolant for generator cooling. The hydrogen pressure required by the scenes is low, and the high-pressure stored hydrogen needs to be adjusted to the low-pressure condition required by the inlet of the equipment in a decompression mode during the use process, so that the energy waste is caused indirectly.
Disclosure of Invention
The present invention is directed to a high pressure hydrogen storage energy recovery system, which can effectively recover and utilize energy in a hydrogen pressure conversion process.
The utility model aims to provide a high-pressure hydrogen storage energy recovery system which is used for utilizing the pressure difference when high-pressure hydrogen is converted into low-pressure hydrogen to do work externally so as to realize energy recovery and comprises a high-pressure hydrogen storage tank, a hydrogen expander, a generator and a refrigerant pipeline which are arranged in a matched manner, wherein the high-pressure hydrogen storage tank is connected with the hydrogen expander through the high-pressure hydrogen pipeline, the high-pressure hydrogen storage tank is used for conveying the high-pressure hydrogen to the hydrogen expander so as to drive the hydrogen expander to do work externally, the hydrogen expander is connected with a refrigerant user through the refrigerant pipeline and transmits the cold energy of the hydrogen to a refrigerant medium while driving the generator to generate electricity, and the cold energy is conveyed to the cold user by the refrigerant medium in the refrigerant pipeline; and the gas outlet end of the hydrogen expander is connected with a low-pressure hydrogen user through a low-pressure hydrogen pipeline so as to convey the reduced-pressure low-pressure hydrogen.
Further, a flow regulating valve for regulating the air inflow of the hydrogen expander is arranged on the high-pressure hydrogen pipeline.
Further, the hydrogen expander is a piston expander or a turbine expander.
Further, the cold user is a refrigeration house, an air-conditioning refrigeration system or an ice-making system.
Further, the hydrogen storage pressure in the high-pressure hydrogen storage tank is 20-70 MPa, and the hydrogen pressure at the gas outlet end of the hydrogen expander is 0.2-1 MPa.
The utility model has the beneficial technical effects that: the utility model utilizes the energy generated in the process of converting high-pressure hydrogen into low-pressure hydrogen to drive the expansion machine to do work outwards to generate power, meanwhile, the temperature of the hydrogen is greatly reduced in the expansion process, the cold energy can be recovered through the cold medium, the whole system has simple structure and lower manufacturing cost, meanwhile, the energy is effectively recovered, the economy and the utilization rate of the hydrogen utilization are improved, and the comprehensive utilization of the energy is realized.
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FIG. 1 is a schematic view of the overall composition of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention is further described with reference to the accompanying drawings and examples.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inside", "outside", "lateral", "vertical", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, the high-pressure hydrogen storage energy recovery system according to the present invention is configured to utilize a pressure difference generated when high-pressure hydrogen is converted into low-pressure hydrogen to perform an external work to recover energy, and includes a high-pressure hydrogen storage tank 1, a hydrogen expander 2, a generator 3, and a refrigerant pipeline 4, which are configured in a matching manner, wherein the high-pressure hydrogen storage tank 1 is connected to the hydrogen expander 2 through a high-pressure hydrogen pipeline 5, the hydrogen expander 2 is connected to a refrigerant user 6 through the refrigerant pipeline 4, and an air outlet end of the hydrogen expander 2 is connected to a low-pressure hydrogen user 8 through a low-pressure hydrogen pipeline 7 to deliver the reduced-pressure low-pressure hydrogen. Hydrogen in the high pressure hydrogen storage tank 1 passes through hydrogen expander 2 and externally acts, hydrogen expander 2 drives generator 3 and generates electricity, to outer output electric quantity, the hydrogen pressure decline behind the hydrogen expander can directly get into low pressure hydrogen user 8, simultaneously because high pressure hydrogen can be cooled down by a wide margin at hydrogen expander 2 interior acting, cold volume accessible cold medium matter of this part supplies with cold user 6, whole system supplies cold to the external world when turning into the electric energy with the pressure potential energy that high pressure hydrogen contains, thereby realize the recovery of energy.
Referring to fig. 1, a flow regulating valve 9 is disposed on the high-pressure hydrogen pipeline 5, and the adjustment of the air intake amount of the hydrogen expander 2 can be realized by adjusting the opening degree of the flow regulating valve 9, so as to better meet the requirements of a low-pressure hydrogen user 8, where the low-pressure hydrogen user 8 may be a hydrogen fuel cell or other users. The hydrogen expander 2 is a piston expander or a turbine expander, hydrogen can be approximately regarded as an isentropic expansion process in the hydrogen expander 2, partial internal energy of gas is converted into work, and molecular kinetic energy is reduced for overcoming intermolecular attraction, so that the gas temperature is reduced. The gas acting externally can generate electricity through the generator 3, the external refrigerant medium exchanges heat with the expanded low-temperature hydrogen, the cold energy is taken away through the refrigerant medium and provides the cold energy for the cold user 6, and the cold user 6 can be a refrigeration house, an air-conditioning refrigeration system or an ice-making system. The hydrogen storage pressure in the high-pressure hydrogen storage tank 1 is 20-70 MPa, and the higher the hydrogen pressure is, the stronger the capacity of acting on the outside is; the pressure of the high-pressure hydrogen is greatly reduced after passing through the hydrogen expander 2, and the high-pressure hydrogen does not need to be decompressed through a pressure regulating system, so that the energy waste is avoided, and the outlet pressure range of the hydrogen expander is 0.2-1 MPa generally.
The system can combine wind power photovoltaic power generation hydrogen production, power grid valley electricity hydrogen production, high-pressure gaseous hydrogen storage and hydrogen fuel cell and hydrogen gas turbine power generation technologies, hydrogen energy can be used as an energy storage medium, the peak regulation effect of a power grid is realized, stable power supply is provided for an island system, meanwhile, the contradiction between high pressure hydrogen storage pressure and low pressure of hydrogen used by equipment such as a fuel cell and a hydrogen gas turbine is solved, pressure potential energy contained in high-pressure hydrogen is recovered, and the energy utilization efficiency of the whole system is improved. In addition, the system can also be used for a vehicle-mounted hydrogen fuel cell, the high-pressure hydrogen can provide power for the automobile or charge a storage battery in the expansion process, and meanwhile, the cold energy generated in the hydrogen expansion process can also supply cold for an air conditioning system of the automobile. The volume of the hydrogen storage equipment can be reduced by a high-pressure hydrogen storage mode, so that the equipment investment cost is reduced.
The specific embodiments described herein are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (5)
1. The utility model provides a high pressure stores up hydrogen energy recovery system for utilize the pressure differential when high-pressure hydrogen converts to low pressure hydrogen to do work externally in order to realize the recovery of energy which characterized in that: the high-pressure hydrogen storage tank is connected with the hydrogen expander through the high-pressure hydrogen pipeline, the high-pressure hydrogen storage tank is used for conveying high-pressure hydrogen to the hydrogen expander to drive the hydrogen expander to do work outwards, the hydrogen expander is connected with a refrigerant user through the refrigerant pipeline and transmits the cold energy of the hydrogen to the refrigerant medium while driving the generator to generate electricity, and the refrigerant medium in the refrigerant pipeline conveys the cold energy to the refrigerant user; and the gas outlet end of the hydrogen expander is connected with a low-pressure hydrogen user through a low-pressure hydrogen pipeline so as to convey the reduced-pressure low-pressure hydrogen.
2. The high pressure hydrogen storage energy recovery system of claim 1, wherein: and the high-pressure hydrogen pipeline is provided with a flow regulating valve for regulating the air input of the hydrogen expander.
3. The high pressure hydrogen storage energy recovery system of claim 1 or 2, wherein: the hydrogen expander is a piston expander or a turbine expander.
4. The high pressure hydrogen storage energy recovery system of claim 3, wherein: the cold user is a refrigeration house, an air-conditioning refrigeration system or an ice-making system.
5. The high pressure hydrogen storage energy recovery system of claim 3, wherein: the hydrogen storage pressure in the high-pressure hydrogen storage tank is 20-70 MPa, and the hydrogen pressure at the gas outlet end of the hydrogen expander is 0.2-1 MPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122640695.8U CN216198322U (en) | 2021-11-01 | 2021-11-01 | High-pressure hydrogen storage energy recovery system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122640695.8U CN216198322U (en) | 2021-11-01 | 2021-11-01 | High-pressure hydrogen storage energy recovery system |
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| CN216198322U true CN216198322U (en) | 2022-04-05 |
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| CN202122640695.8U Active CN216198322U (en) | 2021-11-01 | 2021-11-01 | High-pressure hydrogen storage energy recovery system |
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