CN114792826A - Air pressurization system and method using high-pressure hydrogen - Google Patents
Air pressurization system and method using high-pressure hydrogen Download PDFInfo
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- CN114792826A CN114792826A CN202210562382.1A CN202210562382A CN114792826A CN 114792826 A CN114792826 A CN 114792826A CN 202210562382 A CN202210562382 A CN 202210562382A CN 114792826 A CN114792826 A CN 114792826A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04111—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants using a compressor turbine assembly
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04014—Heat exchange using gaseous fluids; Heat exchange by combustion of reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04104—Regulation of differential pressures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04701—Temperature
- H01M8/04708—Temperature of fuel cell reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
- H01M8/04753—Pressure; Flow of fuel cell reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention belongs to the technical field of hydrogen fuel cells, relates to a hydrogen fuel cell automobile, and particularly relates to an air pressurization system and method utilizing high-pressure hydrogen. The system comprises: the multistage expansion device is formed by connecting a plurality of expansion machines in series and/or in parallel and is used for converting high-pressure hydrogen in a hydrogen source of the hydrogen fuel cell automobile into low-pressure hydrogen and outputting mechanical energy; an air compressor for pressurizing ambient air; the power generation device converts mechanical energy output by the multistage expansion device into electric energy, and transmits the electric energy to the air compressor to enable the air compressor to operate; and the heat exchanger is used for exchanging heat between the low-pressure hydrogen output by the multistage expansion device and the pressurized air output by the air compressor and conveying the low-pressure hydrogen and the pressurized air after heat exchange to a hydrogen fuel cell in the hydrogen fuel cell automobile. The invention can solve the problems of energy waste when the high-pressure hydrogen of the hydrogen fuel cell is decompressed and energy consumption when the air is pressurized and cooled in the hydrogen fuel cell automobile.
Description
Technical Field
The invention belongs to the technical field of hydrogen fuel cells, relates to a hydrogen fuel cell automobile, and particularly relates to an air pressurization system and method utilizing high-pressure hydrogen.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
In order to ensure that the hydrogen fuel cell automobile has larger cruising ability, the hydrogen storage system must store more hydrogen, and in order to store more hydrogen in a limited volume, the hydrogen storage density must be improved, so the existing hydrogen fuel cell automobile has higher hydrogen storage pressure, and the hydrogen storage pressure is 35MPa or 70 MPa. The pressurization of the hydrogen gas to 35MPa or 70MPa requires a large amount of energy, however, the inventors have found that, when the hydrogen fuel cell is in normal operation, the normal hydrogen supply pressure is about 1MPa or less (0.2MPa), and the hydrogen gas is wasted in the pressure reduction process of storing the energy during pressurization through the pressure reduction valve, resulting in energy loss. The fuel cell still needs the compressed air of certain pressure when working, and the compressed air needs air compressor compressed atmosphere to supply to compressed air still needs the intercooler to cool down, and this also needs to consume certain energy, has reduced fuel cell's energy utilization efficiency.
Disclosure of Invention
In order to solve the problems of energy waste when the high-pressure hydrogen of the hydrogen fuel cell is decompressed and energy consumption when the air is pressurized and cooled in a hydrogen fuel cell automobile, the invention aims to provide an air pressurization system and method by utilizing the high-pressure hydrogen, so that the energy consumption is reduced, and the energy utilization rate of the fuel cell is improved.
In order to achieve the purpose, the technical scheme of the invention is as follows:
in one aspect, an air pressurizing system using high-pressure hydrogen, includes:
the multistage expansion device is formed by connecting a plurality of expansion machines in series and/or in parallel and is used for converting high-pressure hydrogen in a hydrogen source of the hydrogen fuel cell automobile into low-pressure hydrogen and outputting mechanical energy;
a turbocharger configured to pressurize ambient air using mechanical energy output by the multi-stage expansion device;
and the heat exchanger is used for exchanging heat between the low-pressure hydrogen output by the multistage expansion device and the pressurized air output by the air compressor, and conveying the low-pressure hydrogen and the pressurized air after heat exchange to a hydrogen fuel cell in the hydrogen fuel cell automobile.
Because the pressure of the hydrogen source in the hydrogen fuel cell automobile is higher, and the space in the hydrogen fuel cell automobile is smaller, a multistage expansion device is arranged, the space utilization rate is improved through the series connection of a plurality of expansion machines, and the hydrogen can be reduced to the working requirement of the fuel cell.
The arrangement of the turbocharger can enable high-pressure hydrogen to expand and directly drive the turbocharger to pressurize air, and energy consumption is reduced.
Air compressor compresses the air, the air temperature after the compression risees, however, hydrogen fuel cell's best operating temperature is 70 ~ 80 ℃, if the air temperature is too high, can increase the heat load of battery reactor, still can influence the air input, therefore need cool down the air after the compression, and multistage expansion device not only can step down the compressed gas inflation, can also reduce the temperature of the low pressure hydrogen that the inflation step-down, can utilize microthermal low pressure hydrogen as the temperature of the air after the cold source reduction compression through the heat exchanger, thereby omit the intercooler, reduce the energy consumption, and save space.
In another aspect, an air pressurizing system using high-pressure hydrogen includes:
the multistage expansion device is formed by connecting a plurality of expansion machines in series and/or in parallel and is used for converting high-pressure hydrogen in a hydrogen source of the hydrogen fuel cell vehicle into low-pressure hydrogen and outputting mechanical energy;
an air compressor arranged to pressurize ambient air;
the power generation device is arranged to convert mechanical energy output by the multistage expansion device into electric energy and transmit the electric energy to the air compressor so as to enable the air compressor to operate;
and the heat exchanger is used for exchanging heat between the low-pressure hydrogen output by the multistage expansion device and the pressurized air output by the air compressor, and conveying the low-pressure hydrogen and the pressurized air after heat exchange to a hydrogen fuel cell in the hydrogen fuel cell automobile.
Because the pressure of the hydrogen source in the hydrogen fuel cell automobile is higher, and the space in the hydrogen fuel cell automobile is smaller, the multistage expansion device is arranged, the space utilization rate is improved through the series connection of the plurality of expansion machines in series connection, and the hydrogen can be reduced to the working requirement of the fuel cell.
The expander can utilize the compressed gas inflation to step down and outwards export mechanical energy, because multistage expander establishes ties, directly is used for air compressor with mechanical energy directly, can waste partial mechanical energy, therefore sets up power generation facility, changes mechanical energy into the electric energy through power generation facility and transmits to air compressor in unison, can synthesize better and utilize high-pressure hydrogen to turn into the mechanical energy that low pressure hydrogen produced to reduce the energy consumption.
Air compressor compresses the air, the air temperature after the compression risees, however, hydrogen fuel cell's best operating temperature is 70 ~ 80 ℃, if the air temperature is too high, can increase the heat load of battery reactor, still can influence the air input, therefore need cool down the air after the compression, and multistage expansion device not only can step down the compressed gas inflation, can also reduce the temperature of the low pressure hydrogen of inflation step-down, can utilize microthermal low pressure hydrogen to reduce the temperature of the air after the compression as the cold source through the heat exchanger, thereby omit the intercooler, reduce the energy consumption, and save space.
Since the gas pressure generated by the fuel cell is high and directly discharged, energy loss is caused, and in order to further utilize the energy, an air expander is further included and is configured to depressurize the gas discharged from the hydrogen fuel cell and output mechanical energy, and the mechanical energy output by the air expander is transmitted to the power generation device. The energy utilization rate can be further improved, and the energy consumption is reduced.
In a third aspect, a method for pressurizing air with high-pressure hydrogen gas, the above-mentioned air pressurizing system with high-pressure hydrogen gas is provided;
the method comprises the steps of conveying 35-70 MPa hydrogen stored in a hydrogen fuel cell automobile to a multistage expansion device for depressurization to generate 0.2-1.2 MPa hydrogen with mechanical energy and reduced temperature, driving a turbocharger to compress air by the mechanical energy generated by the multistage expansion device, exchanging heat between the compressed air and the 0.2-1.2 MPa hydrogen to cool the compressed air, and conveying the compressed air and the 0.2-1.2 MPa hydrogen after heat exchange to the hydrogen fuel cell.
In a fourth aspect, a method for pressurizing air with high-pressure hydrogen is provided, wherein the air pressurizing system with high-pressure hydrogen is provided;
the method comprises the steps of conveying 35-70 MPa hydrogen stored in a hydrogen fuel cell automobile to a multistage expansion device for depressurization to generate 0.2-1.2 MPa hydrogen with mechanical energy and reduced temperature, using the mechanical energy generated by the multistage expansion device for power generation, using electric energy to drive an air compressor to compress air, exchanging heat between the compressed air and the 0.2-1.2 MPa hydrogen to cool the compressed air, and conveying the compressed air and the 0.2-1.2 MPa hydrogen after heat exchange to the hydrogen fuel cell.
The invention has the beneficial effects that:
1. the invention releases the energy generated in the process of hydrogen from the high-pressure state to the low-pressure state to compress the atmosphere through the motor to generate the compressed air for the fuel cell, thereby saving the consumption of the air compressor in the existing fuel cell on electric energy and improving the energy utilization rate.
2. The temperature of the hydrogen can be reduced after the hydrogen is expanded by the expansion system, and the temperature of the atmosphere can be increased after the hydrogen is compressed.
3. The air generated by the fuel cell is expanded by the air expander and then discharged into the atmosphere, and the energy generated by the air expander is used for compressing the atmosphere for the fuel cell, so that the energy of the fuel cell is fully utilized, and the electric energy used for compressing the air can be reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are included to illustrate an exemplary embodiment of the invention and not to limit the invention.
Fig. 1 is a schematic configuration diagram of an air charging system using high-pressure hydrogen gas according to embodiment 1 of the present invention;
wherein, 1, a high-pressure hydrogen chamber; 2. a multi-stage expansion device; 3. a heat exchanger; 4. a motor; 5. an air compressor; 6. a surrounding environment; 7. an air expander; 8. a depressurization hydrogen buffer chamber; 9. a fuel cell; 10. a compressed air buffer chamber; 11. and an auxiliary heating device.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As described in the background art, the prior art has disadvantages of energy loss and low capacity utilization efficiency of the fuel cell during the hydrogen pressure reduction process, and the present invention provides an air pressurization system and method using high pressure hydrogen to solve the above technical problems.
In an exemplary embodiment of the present invention, there is provided an air pressurizing system using high-pressure hydrogen, including:
the multistage expansion device is formed by connecting a plurality of expansion machines in series and/or in parallel and is used for converting high-pressure hydrogen in a hydrogen source of the hydrogen fuel cell vehicle into low-pressure hydrogen and outputting mechanical energy;
a turbocharger configured to pressurize ambient air using mechanical energy output by the multi-stage expansion device;
and the heat exchanger is used for exchanging heat between the low-pressure hydrogen output by the multistage expansion device and the pressurized air output by the air compressor, and conveying the low-pressure hydrogen and the pressurized air after heat exchange to a hydrogen fuel cell in the hydrogen fuel cell automobile.
The multistage expansion device provided by the invention not only can convert high-pressure hydrogen into low-pressure hydrogen and convey mechanical energy, but also can improve the space utilization rate.
The invention is provided with the turbocharger, so that high-pressure hydrogen is expanded to directly drive the turbocharger to pressurize air, and the energy consumption is reduced.
The heat exchanger can reduce the temperature of the compressed air by using low-pressure hydrogen at low temperature as a cold source, thereby omitting an intercooler, reducing energy consumption and saving space.
Some embodiments of the present invention include an air expander configured to depressurize the hydrogen fuel cell exhaust gas and output mechanical energy, the mechanical energy output by the air expander driving a turbocharger. The energy utilization rate can be further improved, and the energy consumption is reduced.
Some embodiments of this embodiment include an auxiliary heating device for heating the heat exchanger. Compressed air and low pressure hydrogen after the heat exchanger heat transfer when can not reach fuel cell operation requirement, assist heat facility help and carry out thermal conversion, guarantee that the gas of heat exchanger output can maintain 70 ~ 80 ℃.
Some embodiments of the embodiment comprise a depressurization hydrogen buffer chamber, and the low-pressure hydrogen delivered by the heat exchanger is delivered to the depressurization hydrogen buffer chamber. And the stable operation of the hydrogen fuel cell is ensured.
Some embodiments of the embodiment comprise a compressed air buffer chamber, and the low-pressure hydrogen delivered by the heat exchanger is delivered to the compressed air buffer chamber. And the stable operation of the hydrogen fuel cell is ensured.
In another embodiment of the present invention, there is provided an air pressurizing system using high-pressure hydrogen, including:
the multistage expansion device is formed by connecting a plurality of expansion machines in series and is used for converting high-pressure hydrogen in a hydrogen source of the hydrogen fuel cell automobile into low-pressure hydrogen and outputting mechanical energy;
an air compressor arranged to pressurise ambient atmosphere;
the power generation device is arranged to convert mechanical energy output by the multistage expansion device into electric energy and transmit the electric energy to the air compressor so as to enable the air compressor to operate;
and the heat exchanger is used for exchanging heat between the low-pressure hydrogen output by the multistage expansion device and the pressurized air output by the air compressor, and conveying the low-pressure hydrogen and the pressurized air after heat exchange to the hydrogen fuel cell in the hydrogen fuel cell automobile.
The multistage expansion device provided by the invention can convert high-pressure hydrogen into low-pressure hydrogen, convey mechanical energy and improve the space utilization rate.
The invention is provided with the power generation device, and the mechanical energy is converted into the electric energy by the power generation device and is uniformly transmitted to the air compressor, so that the mechanical energy generated by converting high-pressure hydrogen into low-pressure hydrogen can be better and comprehensively utilized, and the energy consumption is reduced.
The heat exchanger can reduce the temperature of the compressed air by using low-temperature low-pressure hydrogen as a cold source, thereby omitting an intercooler, reducing energy consumption and saving space.
Some embodiments of the present invention include an air expander configured to depressurize a gas discharged from the hydrogen fuel cell and output mechanical energy, and to deliver the mechanical energy output from the air expander to the power generation device. The energy utilization rate can be further improved, and the energy consumption is reduced.
Some embodiments of this embodiment include an auxiliary heating device for heating the heat exchanger. When the compressed air and the low-pressure hydrogen after heat exchange of the heat exchanger cannot meet the working requirement of the fuel cell, the auxiliary heating device assists in heat conversion, and the gas output by the heat exchanger can be maintained at 70-80 ℃.
Some embodiments of the embodiment comprise a depressurization hydrogen buffer chamber, and the low-pressure hydrogen delivered by the heat exchanger is delivered to the depressurization hydrogen buffer chamber. And the stable operation of the hydrogen fuel cell is ensured.
Some embodiments of the embodiment comprise a compressed air buffer chamber, and the low-pressure hydrogen delivered by the heat exchanger is delivered to the compressed air buffer chamber. And the stable operation of the hydrogen fuel cell is ensured.
In a third embodiment of the present invention, there is provided an air pressurizing method using high-pressure hydrogen, which provides the above-mentioned air pressurizing system using high-pressure hydrogen;
the method comprises the steps of conveying 35-70 MPa hydrogen stored in a hydrogen fuel cell automobile to a multistage expansion device for depressurization to generate 0.2-1.2 MPa hydrogen with mechanical energy and reduced temperature, driving a turbocharger by the mechanical energy generated by the multistage expansion device to compress air, exchanging heat between the compressed air and the 0.2-1.2 MPa hydrogen to cool the compressed air, and conveying the compressed air and the 0.2-1.2 MPa hydrogen after heat exchange to the hydrogen fuel cell.
In some embodiments of the embodiment, the hydrogen gas with 0.2-1.2 MPa after heat exchange is buffered and then is conveyed to a hydrogen fuel cell.
In some examples of this embodiment, the heat exchanged compressed air is buffered and then delivered to the hydrogen fuel cell.
In some examples of this embodiment, the extracted exhaust from the fuel cell is expanded by an expanded air expander and discharged to the atmosphere, and the energy generated by the expansion of the air is used in a turbocharger.
In a fourth embodiment of the present invention, there is provided an air-pressurizing method using high-pressure hydrogen, which provides the above-mentioned air-pressurizing system using high-pressure hydrogen;
the method comprises the steps of conveying 35-70 MPa hydrogen stored in a hydrogen fuel cell automobile to a multistage expansion device for depressurization to generate 0.2-1.2 MPa hydrogen with mechanical energy and reduced temperature, using the mechanical energy generated by the multistage expansion device for power generation, using electric energy to drive an air compressor to compress air, exchanging heat between the compressed air and the 0.2-1.2 MPa hydrogen to cool the compressed air, and conveying the compressed air and the 0.2-1.2 MPa hydrogen to the hydrogen fuel cell after heat exchange.
In some embodiments of the embodiment, the hydrogen gas with 0.2 to 1.2MPa after heat exchange is buffered and then is delivered to a hydrogen fuel cell.
In some examples of this embodiment, the heat exchanged compressed air is buffered and then delivered to the hydrogen fuel cell.
In some examples of this embodiment, the extracted exhaust from the fuel cell is expanded by an expanded air expander and then discharged to the atmosphere, and the energy generated by the expanded air is used in a power plant.
In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, a power generation device is provided as an example below, and the technical solutions of the present invention are described in detail with reference to specific embodiments.
Examples
An air pressurization system using high-pressure hydrogen comprises an inflation inlet, a high-pressure hydrogen chamber 1, a multi-stage expansion device 2, a heat exchanger 3, a generator 4, an air compressor 5, an air expander 7, a pressure reduction hydrogen buffer chamber 8, a fuel cell 9, a compressed air buffer chamber 10 and an auxiliary heating device 11, as shown in figure 1. High-pressure hydrogen flows out of the high-pressure hydrogen chamber 1 and then enters the multi-stage expansion device 2 and the heat exchanger 3, the generator 4 is driven to generate electricity through the expansion action of the multi-stage expansion device 2, the generator 4 is used for the air compressor 5 after generating electricity, the air compressor 5 compresses the atmosphere provided in the surrounding environment 6, the high-pressure hydrogen multi-stage expansion device 2 can cool down after the expansion action, the high-pressure hydrogen multi-stage expansion device exists in a low-temperature form, the atmosphere provided in the surrounding environment 6 can heat up after the compression action of the air compressor 5, the high-pressure hydrogen multi-stage expansion device exists in a high-temperature form, the low-temperature hydrogen and the high-temperature air carry out heat transfer through the heat exchanger 3, so that the hydrogen and the air meet the working requirements of the fuel cell 9, when the heat transfer of the low-temperature hydrogen and the high-temperature air does not reach the working requirements of the fuel cell 9, the auxiliary heating device 11 works to carry out heat transfer, so that the air and the hydrogen meet the working requirements of the fuel cell 9, the low-pressure hydrogen is stored in the pressure-reducing hydrogen buffer chamber after passing through the heat exchanger 3 and is stored for the fuel cell 9, the compressed air enters the compressed air buffer chamber 10 after passing through the heat exchanger 3 and is stored for the fuel cell 9, the air generated after the fuel cell 9 works is expanded by the air expander 7 and then is discharged into the atmosphere, and the air expander 7 is also used for the motor 4 to generate power to drive the air compressor to compress the atmosphere for the fuel cell 9.
The above description is only a 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 (10)
1. An air supercharging system using high-pressure hydrogen, comprising:
the multistage expansion device is formed by connecting a plurality of expansion machines in series and/or in parallel and is used for converting high-pressure hydrogen in a hydrogen source of the hydrogen fuel cell vehicle into low-pressure hydrogen and outputting mechanical energy;
a turbocharger configured to pressurize ambient air using mechanical energy output by the multi-stage expansion device;
and the heat exchanger is used for exchanging heat between the low-pressure hydrogen output by the multistage expansion device and the pressurized air output by the air compressor, and conveying the low-pressure hydrogen and the pressurized air after heat exchange to the hydrogen fuel cell in the hydrogen fuel cell automobile.
2. The system for increasing pressure of hydrogen gas using air according to claim 1, comprising an air expander configured to depressurize the gas discharged from the hydrogen fuel cell and output mechanical energy, the mechanical energy output from the air expander driving the turbocharger.
3. An air supercharging system using high-pressure hydrogen, comprising:
the multistage expansion device is formed by connecting a plurality of expansion machines in series and is used for converting high-pressure hydrogen in a hydrogen source of the hydrogen fuel cell automobile into low-pressure hydrogen and outputting mechanical energy;
an air compressor arranged to pressurise ambient atmosphere;
the power generation device is arranged to convert mechanical energy output by the multistage expansion device into electric energy and transmit the electric energy to the air compressor so as to enable the air compressor to operate;
and the heat exchanger is used for exchanging heat between the low-pressure hydrogen output by the multistage expansion device and the pressurized air output by the air compressor, and conveying the low-pressure hydrogen and the pressurized air after heat exchange to the hydrogen fuel cell in the hydrogen fuel cell automobile.
4. An air charging system using hydrogen gas under high pressure according to claim 3, comprising an air expander configured to depressurize the gas discharged from the hydrogen fuel cell and output mechanical energy, and to deliver the mechanical energy output from the air expander to the power generation means.
5. The system for pressurizing air with high pressure hydrogen as set forth in claim 1 or 3, comprising an auxiliary heating means for heating the heat exchanger.
6. The air pressurizing system using high-pressure hydrogen according to claim 1 or 3, comprising a depressurization hydrogen buffer chamber to which the low-pressure hydrogen supplied from the heat exchanger is supplied;
or, the low-pressure hydrogen gas delivered by the heat exchanger is delivered to the compressed air buffer chamber.
7. An air pressurizing method using high-pressure hydrogen, characterized by providing the air pressurizing system using high-pressure hydrogen according to any one of claims 1 to 2 and 5 to 6;
the method comprises the steps of conveying 35-70 MPa hydrogen stored in a hydrogen fuel cell automobile to a multistage expansion device for depressurization to generate 0.2-1.2 MPa hydrogen with mechanical energy and reduced temperature, driving a turbocharger to compress air by the mechanical energy generated by the multistage expansion device, exchanging heat between the compressed air and the 0.2-1.2 MPa hydrogen to cool the compressed air, and conveying the compressed air and the 0.2-1.2 MPa hydrogen after heat exchange to the hydrogen fuel cell.
8. The method of pressurizing air with high pressure hydrogen according to claim 7, wherein the extracted exhaust from the fuel cell is expanded by an expanded air expander and discharged to the atmosphere, and energy generated by the expansion of the air is used in a turbocharger.
9. An air-pressurizing method using high-pressure hydrogen, characterized by providing the air-pressurizing system using high-pressure hydrogen according to any one of claims 3 to 6;
the method comprises the steps of conveying 35-70 MPa hydrogen stored in a hydrogen fuel cell automobile to a multistage expansion device for depressurization to generate 0.2-1.2 MPa hydrogen with mechanical energy and reduced temperature, using the mechanical energy generated by the multistage expansion device for power generation, using electric energy to drive an air compressor to compress air, exchanging heat between the compressed air and the 0.2-1.2 MPa hydrogen to cool the compressed air, and conveying the compressed air and the 0.2-1.2 MPa hydrogen after heat exchange to the hydrogen fuel cell.
10. The method of pressurizing air by using high pressure hydrogen as set forth in claim 9, wherein the extracted air discharged from the fuel cell is expanded by an air expander and discharged to the atmosphere, and energy generated by the expansion of the air is utilized in a power generating device.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115207397A (en) * | 2022-09-08 | 2022-10-18 | 国网浙江省电力有限公司宁波供电公司 | Hydrogen fuel cell and compressed air energy storage combined operation system and control method thereof |
| CN115224305A (en) * | 2022-09-14 | 2022-10-21 | 国网浙江省电力有限公司宁波供电公司 | Hydrogen fuel cell power generation system and control method thereof |
| CN115539415A (en) * | 2022-10-17 | 2022-12-30 | 中汽创智科技有限公司 | Air compressor, fuel cell system and vehicle |
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| CN115539415A (en) * | 2022-10-17 | 2022-12-30 | 中汽创智科技有限公司 | Air compressor, fuel cell system and vehicle |
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