CN210984860U - Air system of fuel cell - Google Patents
Air system of fuel cell Download PDFInfo
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- CN210984860U CN210984860U CN201921892342.3U CN201921892342U CN210984860U CN 210984860 U CN210984860 U CN 210984860U CN 201921892342 U CN201921892342 U CN 201921892342U CN 210984860 U CN210984860 U CN 210984860U
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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
- 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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model discloses a fuel cell's air system, including the fuel cell pile, be used for producing and carry compressed air's compressor arrangement to the fuel cell pile, be used for cooling device and heat exchanger that cool down to compressed air, the first air inlet of heat exchanger communicates in compressor arrangement's gas outlet, and the first gas outlet of heat exchanger communicates in cooler arrangement's air inlet, and cooler arrangement's gas outlet communicates in the air inlet of fuel cell pile, and the gas outlet of fuel cell pile communicates in the second air inlet of heat exchanger. Utilize the lower gas of fuel cell pile exhaust gas temperature, carry out heat exchange in the heat exchanger earlier with the higher compressed air of the produced temperature of compressor arrangement and the lower gas of fuel cell pile exhaust temperature to reduce the temperature when compressed air gets into cooling device, and then reduced the energy consumption of cooling device when cooling down compressed air, promoted fuel cell's generating efficiency.
Description
Technical Field
The utility model relates to a fuel cell technical field, more specifically say, relate to a fuel cell's air system.
Background
With the continuous increase of energy consumption equipment such as modern ships, automobiles and the like and the continuous reduction of global oil reserves, the development and the utilization of new energy sources are not slow. In the field of power devices, the power density and the cruising ability of a fuel cell have obvious advantages compared with the traditional battery energy sources such as the traditional lithium battery and the like, so that the fuel cell is considered as new energy power with great development prospect in the future.
The fuel cell developed more recently is a hydrogen-oxygen fuel cell, which uses the heat generated by the chemical reaction of hydrogen and oxygen in the fuel cell to generate electricity, and the exhaust gas of the hydrogen-oxygen fuel cell only contains pollution-free water and water vapor. For the hydrogen required for the reaction, a high pressure hydrogen storage tube is generally used for storage and carrying, and the oxygen required for the reaction is generally supplied from the environment by an air compressor.
In the prior art, in order to increase the power density of the fuel cell stack, the air temperature of the compressed air entering the fuel cell stack at the inlet of the stack needs to be reduced, so as to increase the intake air density. In the process of reducing the temperature of the compressed air, however, transport energy that consumes a part of the cooling medium is consumed, thereby reducing the efficiency of the fuel cell system.
Therefore, how to reduce the temperature of the compressed air and reduce the energy consumed by the fuel cell is a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides an air system of a fuel cell, which effectively utilizes the stack exhaust energy of the fuel cell to cool the temperature of the compressed air, so as to reduce the energy consumption of the fuel cell.
In order to achieve the above object, the present invention provides the following technical solutions:
the air system of the fuel cell comprises a fuel cell stack, a compression device used for generating and conveying compressed air to the fuel cell stack, a cooling device used for cooling the compressed air and a heat exchanger, wherein a first air inlet of the heat exchanger is communicated with an air outlet of the compression device, a first air outlet of the heat exchanger is communicated with an air inlet of the cooling device, an air outlet of the cooling device is communicated with an air inlet of the fuel cell stack, and an air outlet of the fuel cell stack is communicated with a second air inlet of the heat exchanger.
Preferably, the compression device comprises a first-stage air compressor, a second-stage air compressor and a motor, an air outlet of the first-stage air compressor is connected to an air inlet of the second-stage air compressor, an air outlet of the second-stage air compressor is connected to the first air inlet of the heat exchanger, and the motor is respectively in driving connection with the first-stage air compressor and the second-stage air compressor so that air is input from the air inlet of the first-stage air compressor and is respectively output from the air outlet of the second-stage air compressor after being compressed by the first-stage air compressor and the second-stage air compressor.
Preferably, the primary air compressor and the secondary air compressor are both centrifugal compressors.
Preferably, the cooling device is an intercooler.
Preferably, the intercooler is a water-cooled intercooler.
Preferably, the heat exchanger further comprises an expander connected to the motor, and an air inlet of the expander is communicated with the second air outlet of the heat exchanger.
Preferably, the motor is connected to the primary air compressor through a first connecting shaft, the motor is connected to the secondary air compressor through a second connecting shaft, the expander is connected to the second connecting shaft through a third connecting shaft, and the first connecting shaft, the second connecting shaft and the third connecting shaft are coaxial.
The utility model provides an air system of fuel cell, which comprises a fuel cell stack, a compression device used for generating and delivering compressed air to the fuel cell stack, a cooling device used for cooling the compressed air and a heat exchanger; the first air inlet of the heat exchanger is communicated with the air outlet of the compression device, the first air outlet of the heat exchanger is communicated with the air inlet of the cooling device, the air outlet of the cooling device is communicated with the air inlet of the fuel cell stack, and the air outlet of the fuel cell stack is communicated with the second air inlet of the heat exchanger.
Because the first air inlet of heat exchanger is connected in compressor arrangement, cooling device is connected to first gas outlet, therefore, the higher compressed air of the temperature of compressor arrangement output can advance into the heat exchanger then reentrant cooling device, the second air inlet of heat exchanger is connected in the gas outlet of fuel cell pile, therefore, the lower gas of exhaust gas temperature can get into the heat exchanger in the follow fuel cell pile, and carry out heat exchange with the higher compressed air of temperature, thereby the lower gas of usable fuel cell pile exhaust gas temperature carries out primary cooling to compressed air, in order to reduce the temperature that compressed air got into cooling device, thereby reduce cooling device's energy consumption, improve fuel cell's generating efficiency.
Therefore, the utility model provides a fuel cell's air system utilizes the lower gas of fuel cell pile combustion gas temperature, carries out heat exchange in the heat exchanger earlier with the higher compressed air of the produced temperature of compressor arrangement and the lower gas of fuel cell pile exhaust temperature to tentatively reduce compressed air's temperature, thereby reduce the temperature when compressed air gets into cooling device, and then reduced the energy consumption of cooling device when cooling down compressed air, fuel cell's generating efficiency has been promoted.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic diagram of an embodiment of an air system of a fuel cell provided by the present invention.
The system comprises a fuel cell stack 1, an intercooler 2, a heat exchanger 3, a primary air compressor 4, a first connecting shaft 5, a motor 6, a second connecting shaft 7, a secondary air compressor 8, a third connecting shaft 9 and an expander 10.
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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The core of the utility model is to provide a fuel cell's air system, utilize fuel cell pile exhaust energy to cool down compressed air's temperature effectively to reduce the consumption of fuel cell energy.
Referring to fig. 1, fig. 1 is a schematic diagram of an embodiment of an air system of a fuel cell according to the present invention.
The utility model provides an air system of fuel cell, which comprises a fuel cell stack 1, a compression device used for generating and delivering compressed air to the fuel cell stack 1, a cooling device used for cooling the compressed air and a heat exchanger 3; the first air inlet of the heat exchanger 3 is communicated with the air outlet of the compression device, the first air outlet of the heat exchanger 3 is communicated with the air inlet of the cooling device, the air outlet of the cooling device is communicated with the air inlet of the fuel cell stack 1, and the air outlet of the fuel cell stack 1 is communicated with the second air inlet of the heat exchanger 3.
Referring to fig. 1, arrows indicate the flow direction of air. The fuel cell stack 1 is a combustion place of oxygen to generate electricity through heat energy generated by combustion, the compression device is used for conveying compressed air into the fuel cell stack 1 to ensure normal combustion of hydrogen, the cooling device is used for cooling the compressed air before the compressed air is input into the fuel cell stack 1 to reduce the temperature of the compressed air, so that the density of the compressed air is improved, the air intake flow into the fuel cell stack is improved, and the power generation efficiency is improved.
Therefore, the utility model provides a fuel cell's air system utilizes the lower gas of 1 combustion gas temperature of fuel cell pile, carry out heat exchange in heat exchanger 3 earlier with the higher compressed air of the produced temperature of compressor arrangement and the lower gas of 1 exhaust temperature of fuel cell pile to tentatively reduce compressed air's temperature, thereby reduce the temperature when compressed air gets into cooling device, and then reduced the energy consumption of cooling device when cooling down compressed air, fuel cell's generating efficiency has been promoted.
On the basis of the above embodiment, in consideration of the specific arrangement manner of the compression device, preferably, the compression device includes a primary air compressor 4, a secondary air compressor 8 and a motor 6, an air outlet of the primary air compressor 4 is connected to an air inlet of the secondary air compressor 8, an air outlet of the secondary air compressor 8 is connected to a first air inlet of the heat exchanger 3, and the motor 6 is respectively connected to the primary air compressor 4 and the secondary air compressor 8 in a driving manner, so that air is input from the air inlet of the primary air compressor 4 and is output from the air outlet of the secondary air compressor 8 after being compressed by the primary air compressor 4 and the secondary air compressor 8.
In this embodiment, compression device includes one-level air compressor 4 and second grade air compressor 8, and one-level air compressor 4 all drives through motor 6 with second grade air compressor 8, and air compressor's gas outlet is connected in second grade air compressor 8's air inlet, second grade air compressor 8's gas outlet is connected in heat exchanger 3's air inlet, thereby under motor 6's drive, make the air get into from one-level air compressor 4's air inlet, then obtain compressed air after compressing with second grade air compressor 8's air through one-level air compressor 4 respectively, obtain compressed air, the gas outlet of second grade air compressor 8 inputs to heat exchanger 3 after again, in order to carry out preliminary cooling to compressed air. By adopting a two-stage compression mode, the lower density of the compressed air can be ensured, and the power generation efficiency of the fuel cell is further ensured.
In addition to the above embodiments, it is preferable that the primary air compressor 4 and the secondary air compressor 8 are both centrifugal compressors. The centrifugal compressor has the advantages of large air flow, simple and compact structure, light weight, small unit size, small occupied area and the like. And the operation is balanced, the operation is reliable, the operation rate is high, the friction parts are few, and the required amount of spare parts is small, and the maintenance cost and personnel are few.
In the above embodiment, in consideration of the specific selection of the cooling device, it is preferable that the cooling device be an intercooler 2. The intercooler 2 is cooling equipment commonly used in various industries such as electric power, metallurgy, chemical industry, mines, automobiles, light industry, heavy industry and the like. Utilize intercooler 2 to make two kinds of fluid medium that have certain difference in temperature realize the heat exchange to reach the effect that reduces hot-air temperature, guarantee that the air has suitable result of use, with the realization to compressed air's secondary cooling, with the combustion requirement that accords with fuel cell pile 1 with compressed air's temperature cooling. Specifically, the intercooler 2 is a water-cooled intercooler. The water-cooled intercooler cools the air passing through the intercooler 2 by circulating cooling water. The air inlet pipeline has the advantages of high cooling efficiency, flexible installation position and no need of using a long connecting pipeline, so that the whole air inlet pipeline is smoother.
On the basis of any of the above embodiments, it is considered that the air compression device is electrically driven, and the source of the electric energy is the electric energy generated by the fuel cell, in the current fuel cell system, the electric energy loss generated by the air compressor accounts for more than 60% of the electric energy consumed by all power consuming accessories of the fuel cell system, so that the efficiency of the fuel cell system is difficult to further improve, and in order to further reduce the energy consumption of the air system of the fuel cell provided by the present invention, the power generation efficiency of the fuel cell is improved, preferably, the present invention further includes an expander 10 connected to the motor 6, and the air inlet of the expander 10 is communicated with the air outlet of the heat exchanger 3.
In this embodiment, the expander 10 is connected to the motor 6, and an air inlet of the expander 10 is connected to the second air outlet of the heat exchanger 3, so that after the gas exhausted from the fuel cell stack 1 is subjected to heat exchange with the compressed gas through the heat exchanger, the gas is input to the expander 10, so that the expander 10 uses the heat energy of the gas to do work outwards, and thus the expander 10 is used as auxiliary power of the motor 6, and energy consumption of the motor 6 in the process of driving the primary air compressor 4 and the secondary air compressor 8 is reduced, thereby further improving the power generation efficiency of the fuel cell.
In addition to the above-mentioned embodiments, considering the specific connection mode of the electric motor 6 with the primary air compressor 4, the secondary air compressor 8 and the expander 10, it is preferable that the electric motor 6 is connected to the primary air compressor 4 through a first connection shaft 5, the electric motor 6 is connected to the secondary air compressor 8 through a second connection shaft 7, the expander 10 is connected to the second connection shaft 7 through a third connection shaft 9, and the first connection shaft 5, the second connection shaft 7 and the third connection shaft 9 are coaxial.
That is, in this embodiment, the output shaft of the motor 6 is connected to the first air compressor and the second air compressor through the first connecting shaft 5 and the second connecting shaft 7, and the expander 10 is connected to the second connecting shaft 7 through the third connecting shaft 9, and the first connecting shaft 5, the second connecting shaft 7 and the third connecting shaft 9 are coaxial, that is, the first connecting shaft 5, the second connecting shaft 7 and the third connecting shaft 9 are on the same straight line, so that the expander 10 provides auxiliary power for the motor 6, and the driving energy consumption of the motor 6 is reduced.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The air system of the fuel cell provided by the present invention has been described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (7)
1. The air system of the fuel cell is characterized by comprising a fuel cell stack (1), a compression device used for generating and conveying compressed air to the fuel cell stack (1), a cooling device used for cooling the compressed air and a heat exchanger (3), wherein a first air inlet of the heat exchanger (3) is communicated with an air outlet of the compression device, a first air outlet of the heat exchanger (3) is communicated with an air inlet of the cooling device, an air outlet of the cooling device is communicated with an air inlet of the fuel cell stack (1), and an air outlet of the fuel cell stack (1) is communicated with a second air inlet of the heat exchanger (3).
2. The air system of the fuel cell according to claim 1, wherein the compressing device comprises a primary air compressor (4), a secondary air compressor (8) and an electric motor (6), an air outlet of the primary air compressor (4) is connected to an air inlet of the secondary air compressor (8), an air outlet of the secondary air compressor (8) is connected to a first air inlet of the heat exchanger (3), and the electric motor (6) is respectively connected to the primary air compressor (4) and the secondary air compressor (8) in a driving manner, so that air is input from the air inlet of the primary air compressor (4) and is output from an air outlet of the secondary air compressor (8) after being compressed by the primary air compressor (4) and the secondary air compressor (8).
3. The fuel cell air system according to claim 2, wherein the primary air compressor (4) and the secondary air compressor (8) are both centrifugal compressors.
4. A fuel cell air system according to claim 3, characterized in that the cooling device is an intercooler (2).
5. The air system for a fuel cell according to claim 4, wherein the intercooler (2) is a water-cooled intercooler.
6. The fuel cell air system according to any one of claims 2 to 5, further comprising an expander (10) connected to the electric motor (6), wherein an air inlet of the expander (10) is communicated with the second air outlet of the heat exchanger (3).
7. The fuel cell air system according to claim 6, wherein the motor (6) is connected to the primary air compressor (4) by a first connecting shaft (5), the motor (6) is connected to the secondary air compressor (8) by a second connecting shaft (7), the expander (10) is connected to the second connecting shaft (7) by a third connecting shaft (9), and the first connecting shaft (5), the second connecting shaft (7), and the third connecting shaft (9) are coaxial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921892342.3U CN210984860U (en) | 2019-11-05 | 2019-11-05 | Air system of fuel cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921892342.3U CN210984860U (en) | 2019-11-05 | 2019-11-05 | Air system of fuel cell |
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| CN210984860U true CN210984860U (en) | 2020-07-10 |
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| CN201921892342.3U Active CN210984860U (en) | 2019-11-05 | 2019-11-05 | Air system of fuel cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110661020A (en) * | 2019-11-05 | 2020-01-07 | 大连依勒斯涡轮增压技术有限公司 | Air system of fuel cell |
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2019
- 2019-11-05 CN CN201921892342.3U patent/CN210984860U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110661020A (en) * | 2019-11-05 | 2020-01-07 | 大连依勒斯涡轮增压技术有限公司 | Air system of fuel cell |
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