CN114361513A - System and method for heating hydrogen by hydrogen fuel cell engine - Google Patents
System and method for heating hydrogen by hydrogen fuel cell engine Download PDFInfo
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- CN114361513A CN114361513A CN202210038411.4A CN202210038411A CN114361513A CN 114361513 A CN114361513 A CN 114361513A CN 202210038411 A CN202210038411 A CN 202210038411A CN 114361513 A CN114361513 A CN 114361513A
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 163
- 239000001257 hydrogen Substances 0.000 title claims abstract description 158
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 158
- 239000000446 fuel Substances 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000010438 heat treatment Methods 0.000 title claims abstract description 29
- 238000012544 monitoring process Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 5
- 239000002918 waste heat Substances 0.000 abstract description 5
- 150000002431 hydrogen Chemical class 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- YZCKVEUIGOORGS-IGMARMGPSA-N Protium Chemical compound [1H] YZCKVEUIGOORGS-IGMARMGPSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- YZCKVEUIGOORGS-NJFSPNSNSA-N Tritium Chemical compound [3H] YZCKVEUIGOORGS-NJFSPNSNSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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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 application provides a system and a method for heating hydrogen by a hydrogen fuel cell engine.A controller is used for receiving a first air temperature at an outlet of an air compressor and receiving a second air temperature at an outlet of a wet side of a humidifier; the first end of the first branch is connected with the air compressor and flows through the wet side of the humidifier; the second end of the first branch is connected with a hydrogen heat exchanger; the first end of the second branch is connected with an air compressor; the second end of the second branch is connected with a hydrogen heat exchanger; the controller is connected with the first branch and the second branch; the first branch circuit is opened and the second branch circuit is closed when the first air temperature is less than or equal to the second air temperature; and when the first air temperature is higher than the second air temperature, the second branch is opened and the first branch is closed. The high-temperature air generated in the running process of the engine is utilized to heat the hydrogen through the hydrogen heat exchanger, extra heating equipment is not needed, the waste heat of the engine is effectively utilized, the efficiency of the engine is improved, the overall power consumption of the engine is reduced, and the cost is saved.
Description
Technical Field
The present application relates to the field of vehicle engineering, and more particularly to a system and method for heating hydrogen gas by a hydrogen fuel cell engine.
Background
A hydrogen fuel cell is a device that directly and efficiently converts chemical energy into electrical energy, and the basic principle of the hydrogen fuel cell is the reverse reaction of electrolyzing water. The hydrogen and the oxygen are respectively supplied to the anode and the cathode of the hydrogen fuel cell stack, and react under the action of a catalyst to generate electric energy and water.
With the improvement of environmental awareness of people, the reaction product of the hydrogen fuel cell is water and the like, so that the hydrogen fuel cell has the advantage of low pollution, and the application of the hydrogen fuel cell in an engine is greatly developed.
However, when the hydrogen fuel cell engine is operated in a low-temperature environment, the maximum rated power of the hydrogen fuel cell stack is affected, and pressure fluctuation is generated at the anode inlet of the hydrogen fuel cell stack during low-temperature operation, which causes uneven hydrogen distribution and waste of hydrogen, affects the reliability of the hydrogen fuel cell stack and other engine auxiliary systems, and increases the operation cost.
The traditional method for improving the environmental temperature of the hydrogen fuel cell engine adopts a heater to heat hydrogen, and the power consumption generated by the heater is larger, so that the energy conversion efficiency of the hydrogen fuel cell engine is lower in a period of time after the hydrogen fuel cell engine is started, the hydrogen consumption is larger, and the economic feasibility is lower.
Disclosure of Invention
In view of this, an object of the present application is to provide a system and a method for heating hydrogen gas by a hydrogen fuel cell engine, which can heat hydrogen gas, improve the ambient temperature of the engine, reduce power consumption, and save cost.
In order to achieve the purpose, the technical scheme is as follows:
in a first aspect, an embodiment of the present application provides a system for heating hydrogen gas by a hydrogen fuel cell engine, including: the system comprises a controller, a first branch, a second branch, an air compressor, a humidifier and a hydrogen heat exchanger;
the controller is configured to receive a first air temperature at an outlet of the air compressor and to receive a second air temperature at an outlet of the wet side of the humidifier;
a first end of the first branch is connected with the air compressor and flows through the wet side of the humidifier; the second end of the first branch is connected with the hydrogen heat exchanger;
the first end of the second branch is connected with the air compressor; the second end of the second branch is connected with the hydrogen heat exchanger;
the controller is connected with the first branch and the second branch; for opening the first branch and closing the second branch when the first air temperature is less than or equal to the second air temperature; when the first air temperature is greater than the second air temperature, the second branch is opened and the first branch is closed.
In one possible implementation, the system further includes: an intercooler;
the first end of the intercooler is connected with the hydrogen heat exchanger and used for cooling air flowing through the hydrogen heat exchanger.
In one possible implementation, the system further includes: a drainage switch;
the drainage switch is connected with the first branch and the second branch; for opening the first branch and closing the second branch when the first air temperature is less than or equal to the second air temperature; when the first air temperature is greater than the second air temperature, the second branch is opened and the first branch is closed.
In one possible implementation, the drain switch includes: a three-way valve;
the first end of the three-way valve is connected with the wet side of the humidifier; the second end of the three-way valve is connected with the air compressor; the third end of the three-way valve is connected with the hydrogen heat exchanger;
the three-way valve is used for opening the first end and the third end and closing the second end when the first air temperature is less than or equal to the second air temperature; and when the first air temperature is higher than the second air temperature, opening the second end and the third end, and closing the first end.
In one possible implementation, the system further includes: the first switch valve, the second switch valve, the third switch valve and the fourth switch valve;
the first end of the intercooler is connected with the hydrogen heat exchanger through the second switch valve; the second end of the intercooler is connected with the air compressor through the first switch valve; the third end of the intercooler is connected with the dry side of the humidifier;
one end of the third switch valve is connected with the hydrogen heat exchanger, and the other end of the third switch valve is connected with the tail row;
one end of the fourth switch valve is connected with the wet side of the humidifier, and the other end of the fourth switch valve is connected with the tail row;
when the first air temperature is less than or equal to the second air temperature, opening the first and third on-off valves and closing the second and fourth on-off valves;
when the first air temperature is greater than the second air temperature, the second and fourth switching valves are opened, and the first and third switching valves are closed.
In one possible implementation, the system further includes: a hydrogen fuel cell stack;
one end of the hydrogen fuel cell stack is connected with the hydrogen heat exchanger; the other end is connected with the humidifier.
In one possible implementation, the system further includes: a first temperature sensor and a second temperature sensor;
the first temperature sensor and the second temperature sensor are connected with the controller;
the first temperature sensor is used for monitoring the first air temperature;
the second temperature sensor is used for monitoring the second air temperature;
the controller is configured to receive the first air temperature and the second air temperature.
In a second aspect, an embodiment of the present application provides a method for heating hydrogen gas by a hydrogen fuel cell engine, and a system applying the method includes: the system comprises a controller, a first branch, a second branch, an air compressor, a humidifier and a hydrogen heat exchanger;
the controller is configured to receive a first air temperature at an outlet of the air compressor and to receive a second air temperature at an outlet of the wet side of the humidifier;
a first end of the first branch is connected with the air compressor and flows through the wet side of the humidifier; the second end of the first branch is connected with the hydrogen heat exchanger;
the first end of the second branch is connected with the air compressor; the second end of the second branch is connected with the hydrogen heat exchanger;
the controller is connected with the first branch and the second branch;
the method comprises the following steps:
when the first air temperature is less than or equal to the second air temperature, opening the first branch and closing the second branch;
when the first air temperature is greater than the second air temperature, the second branch is opened and the first branch is closed.
In one possible implementation, the opening and closing of the first branch and the second branch are controlled by a three-way valve; the method further comprises the following steps:
the first end of the three-way valve is connected with the wet side of the humidifier; the second end of the three-way valve is connected with the air compressor; the third end of the three-way valve is connected with the hydrogen heat exchanger;
when the first air temperature is less than or equal to the second air temperature, opening the first end and the third end, and closing the second end;
and when the first air temperature is higher than the second air temperature, opening the second end and the third end, and closing the first end.
In one possible implementation, the temperature is monitored by a first temperature sensor and a second temperature sensor; the method further comprises the following steps:
monitoring the first air temperature by the first temperature sensor;
monitoring the second air temperature with the second temperature sensor.
The embodiment of the application provides a system and a method for heating hydrogen by a hydrogen fuel cell engine, wherein the system comprises: the system comprises a controller, a first branch, a second branch, an air compressor, a humidifier and a hydrogen heat exchanger; the controller is used for receiving a first air temperature at an outlet of the air compressor and receiving a second air temperature at an outlet of a wet side of the humidifier; the first end of the first branch is connected with the air compressor and flows through the wet side of the humidifier; the second end of the first branch is connected with a hydrogen heat exchanger; the first end of the second branch is connected with an air compressor; the second end of the second branch is connected with a hydrogen heat exchanger; the controller is connected with the first branch and the second branch; the first branch circuit is opened and the second branch circuit is closed when the first air temperature is less than or equal to the second air temperature; and when the first air temperature is higher than the second air temperature, the second branch is opened and the first branch is closed. The high-temperature air generated in the running process of the engine is utilized to heat the hydrogen through the hydrogen heat exchanger, extra heating equipment is not needed, the waste heat of the engine is effectively utilized, the efficiency of the engine is improved, the overall power consumption of the engine is reduced, and the cost is saved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating a system for heating hydrogen gas by a hydrogen fuel cell engine according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of another hydrogen fuel cell engine heating system provided by an embodiment of the present application;
fig. 3 shows a flowchart of a method for heating hydrogen gas by a hydrogen fuel cell engine according to an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited by the specific embodiments disclosed below.
As described in the background, a hydrogen fuel cell is a device that directly and efficiently converts chemical energy into electrical energy, and the basic principle of the hydrogen fuel cell is the reverse reaction of electrolyzing water. The hydrogen and the oxygen are respectively supplied to the anode and the cathode of the hydrogen fuel cell stack, and react under the action of a catalyst to generate electric energy and water.
With the improvement of environmental awareness of people, the reaction product of the hydrogen fuel cell is water and the like, so that the hydrogen fuel cell has the advantage of low pollution, and the application of the hydrogen fuel cell in an engine is greatly developed.
However, when the hydrogen fuel cell engine is operated in a low-temperature environment, the maximum rated power of the hydrogen fuel cell stack is affected, and pressure fluctuation is generated at the anode inlet of the hydrogen fuel cell stack during low-temperature operation, which causes uneven hydrogen distribution and waste of hydrogen, affects the reliability of the hydrogen fuel cell stack and other engine auxiliary systems, and increases the operation cost.
The traditional method for improving the environmental temperature of the hydrogen fuel cell engine adopts a heater to heat hydrogen, and the power consumption generated by the heater is larger, so that the energy conversion efficiency of the hydrogen fuel cell engine is lower in a period of time after the hydrogen fuel cell engine is started, the hydrogen consumption is larger, and the economic feasibility is lower.
In order to solve the above technical problem, embodiments of the present application provide a system and a method for heating hydrogen gas by a hydrogen fuel cell engine, the system including: the system comprises a controller, a first branch, a second branch, an air compressor, a humidifier and a hydrogen heat exchanger; the controller is used for receiving a first air temperature at an outlet of the air compressor and receiving a second air temperature at an outlet of a wet side of the humidifier; the first end of the first branch is connected with the air compressor and flows through the wet side of the humidifier; the second end of the first branch is connected with a hydrogen heat exchanger; the first end of the second branch is connected with an air compressor; the second end of the second branch is connected with a hydrogen heat exchanger; the controller is connected with the first branch and the second branch; the first branch circuit is opened and the second branch circuit is closed when the first air temperature is less than or equal to the second air temperature; and when the first air temperature is higher than the second air temperature, the second branch is opened and the first branch is closed. The high-temperature air generated in the running process of the engine is utilized to heat the hydrogen through the hydrogen heat exchanger, extra heating equipment is not needed, the waste heat of the engine is effectively utilized, the efficiency of the engine is improved, the overall power consumption of the engine is reduced, and the cost is saved.
For a better understanding of the technical solutions and effects of the present application, specific embodiments will be described in detail below with reference to the accompanying drawings.
Exemplary System
Referring to fig. 1, a schematic diagram of a system for heating hydrogen gas for a hydrogen fuel cell engine according to an embodiment of the present disclosure is shown;
the method comprises the following steps: the system comprises a controller 1, a first branch 2, a second branch 3, an air compressor 4, a humidifier 5 and a hydrogen heat exchanger 6.
In the present embodiment, the controller 1 is configured to receive a first air temperature at the outlet of the air compressor 4 and a second air temperature at the outlet of the humidifier wet side 52.
Specifically, as shown in fig. 2, a first temperature sensor 7 may be installed at the outlet of the air compressor 4, a second temperature sensor 8 may be installed at the outlet of the humidifier 5, the first temperature sensor 7 and the second temperature sensor are connected to the controller 1, the first temperature sensor 7 is used for monitoring the first air temperature, and the second temperature sensor 8 is used for monitoring the second air temperature. A controller 1 for receiving a first air temperature and a second air temperature.
The controller 1 provided in the embodiment of the present application may be a Powertrain Control Module (PCM) of an engine, so as to Control various components of the engine and accessories.
The first end 21 of the first branch 2 is connected to the air compressor 4 and flows through the humidifier wet side 52, and the second end 22 of the first branch 2 is connected to the hydrogen gas heat exchanger 6. Specifically, the humidifier 5 is divided into a dry side 51 and a wet side 52, and air flows into the dry side 51 of the humidifier via the air compressor 4 and flows out via the wet side 52, so as to humidify the air.
The first end 31 of the second branch 3 is connected to the air compressor 4, and the second end 32 of the second branch 3 is connected to the hydrogen heat exchanger 6.
The controller 1 is connected with the first branch 2 and the second branch 3, and is used for opening the first branch 2 and closing the second branch 3 when the first air temperature is less than or equal to the second air temperature, and opening the second branch 3 and closing the first branch 2 when the first air temperature is greater than the second air temperature.
That is, in the embodiment of the present application, the air temperature at the outlet of the air compressor 4 and the outlet of the humidifier 5 can be monitored in real time, and the air at the higher temperature is conveyed to the hydrogen heat exchanger 6 to perform heat exchange between the air and the hydrogen, so as to achieve the purpose of heating the hydrogen.
In a possible implementation manner, referring to fig. 2, a system provided in an embodiment of the present application further includes: the charge air cooler 9 is provided with a charge air cooler,
the first end of the intercooler 9 is connected to the hydrogen heat exchanger 6 for cooling the air flowing through the hydrogen heat exchanger 6. Because the air can flow through the hydrogen heat exchanger 6 and then flow through the intercooler 9, the hydrogen heat exchanger 6 can reduce the temperature of the high-temperature air, undertake the responsibility of a part of the intercooler 9 and reduce the pressure of the intercooler 9.
In one possible implementation, referring to fig. 2, the system further includes: a conduction switch 10.
The diversion switch 10 is connected with the first branch and the second branch and used for opening the first branch and closing the second branch when the first air temperature is less than or equal to the second air temperature; and when the first air temperature is higher than the second air temperature, the second branch is opened and the first branch is closed. That is, the diversion switch 10 can change the air flow passage, and the gas of the branch with higher temperature is selected to enter the hydrogen heat exchanger, so as to realize the rapid heating of the hydrogen.
Specifically, the drain switch 10 may include: a three-way valve 11.
A first end of the three-way valve 11 is connected to the wet side 52 of the humidifier; the second end of the three-way valve 11 is connected with the air compressor 4; the third end of the three-way valve 11 is connected with the hydrogen heat exchanger 6.
The three-way valve 11 is used for opening the first end and the third end and closing the second end when the first air temperature is less than or equal to the second air temperature; and when the first air temperature is higher than the second air temperature, opening the second end and the third end, and closing the first end. When the first end and the third end are opened and the second end is closed, the first branch is opened and the second branch is closed; when the second end and the third end are opened and the first end is closed, the second branch is opened, the first branch is closed, the change of an air flow channel is conveniently and quickly realized, and gas of the branch with higher temperature is selected to enter the hydrogen heat exchanger so as to realize the quick heating of hydrogen.
In a possible implementation manner, the system provided in the embodiment of the present application may further include: a first switching valve 12, a second switching valve 13, a third switching valve 14, and a fourth switching valve 15;
the first end of the intercooler 9 is connected with the hydrogen heat exchanger 6 through a second switch valve 13; the second end of the intercooler 9 is connected with the air compressor 4 through a first switch valve 12; the third end of the intercooler 9 is connected with the dry side 52 of the humidifier;
one end of the third switch valve 14 is connected with the hydrogen heat exchanger 6, and the other end is connected with the tail bank 16;
one end of the fourth switch valve 15 is connected 52 to the wet side of the humidifier, and the other end is connected to the tail bank 16;
when the first air temperature is less than or equal to the second air temperature, the first and third on-off valves 12 and 14 are opened, and the second and fourth on-off valves 13 and 15 are closed;
when the first air temperature is greater than the second air temperature, the second and fourth switching valves 13 and 15 are opened, and the first and third switching valves 12 and 14 are closed.
That is, in the embodiment of the present application, when the first air temperature is less than or equal to the second air temperature, the first branch is opened, the second branch is closed, the air 1 flows into the intercooler 9 through the first on-off valve 12, is cold-processed by the intercooler 9, and becomes the air 2, and the air 2 flows into the dry side 51 of the humidifier, and becomes the air 3.
In an embodiment of the present application, the system may further include: and a hydrogen fuel cell stack 17, wherein one end of the hydrogen fuel cell stack 17 is connected with the hydrogen gas heat exchanger 6, and the other end is connected with the humidifier 5.
The air 3 can also flow into the hydrogen fuel cell stack 17, so that the oxygen in the air 3 reacts with the hydrogen in the hydrogen fuel cell stack 17, after the reaction, the gas flowing out of the hydrogen fuel cell stack 17 becomes the air 4, the air 4 flows into the wet side 52 of the humidifier becomes the air 5, because the temperature of the gas reacting in the hydrogen fuel cell stack 17 may rise, the temperature of the air 5 is greater than or equal to the temperature of the air 1, then the air 5 flows into the hydrogen heat exchanger 6 through the three-way valve 11 for heating the hydrogen 1 supplied by the hydrogen source 18, the heated hydrogen 2 can flow through other modules, such as a power assembly control module and other components, and has a part of loss to become the hydrogen 3, at this time, the hydrogen 3 is high-temperature hydrogen, and reacts in the hydrogen fuel cell stack 17, so that the hydrogen enters the hydrogen fuel cell stack 17 at an appropriate temperature for reaction, and the reaction efficiency of the hydrogen fuel cell stack 17 can be effectively improved, the pressure fluctuation at the hydrogen inlet of the hydrogen fuel cell stack 17 is reduced, and the hydrogen fuel cell stack 17 is protected. The redundant air 6 after heating the hydrogen 1 is changed into air 7 through a certain loss of the third on-off valve 14 and is finally discharged through the tail gas 16, so that high-temperature gas is effectively utilized, the temperature of the discharged air 7 is also reduced, and the environment-friendly effect is realized.
That is, the air compressor 4, the first on-off valve 12, the intercooler 9, the humidifier 5, the hydrogen fuel cell stack 17, the three-way valve 11, and the hydrogen heat exchanger 6 of the embodiment of the present application together form the first branch passage 2.
When the first air temperature is higher than the second air temperature, the first branch is closed, the second branch is opened, and the air 8 directly enters the hydrogen heat exchanger 6 through the three-way valve 11 and is used for heating the hydrogen 1 supplied by the hydrogen source 18. The heated air 8 becomes air 9 and enters the intercooler 9 through the second switch valve 13, the intercooler 9 further lowers the temperature of the air 9 into air 10, the air 10 becomes air 11 through the dry end of the humidifier, the air flows into the hydrogen fuel cell stack 17 to react and becomes air 12, the air 13 flows into the wet end of the humidifier, and the air flows into the tail bank 16 through the fourth switch valve 15. The method not only utilizes the oxygen in the air to carry out reaction, but also utilizes the high-temperature air to heat the hydrogen, thereby saving the cost and improving the efficiency.
That is, the air compressor 4, the three-way valve 1 and the hydrogen heat exchanger 6 of the embodiment of the present application together constitute the second branch 3.
In fig. 2, the first air at the first air temperature is referred to as air 1, and the second air at the second air temperature is referred to as air 5.
The embodiment of the application provides a system for heating hydrogen by a hydrogen fuel cell engine, which comprises: the system comprises a controller, a first branch, a second branch, an air compressor, a humidifier and a hydrogen heat exchanger; the controller is used for receiving a first air temperature at an outlet of the air compressor and receiving a second air temperature at an outlet of a wet side of the humidifier; the first end of the first branch is connected with the air compressor and flows through the wet side of the humidifier; the second end of the first branch is connected with a hydrogen heat exchanger; the first end of the second branch is connected with an air compressor; the second end of the second branch is connected with a hydrogen heat exchanger; the controller is connected with the first branch and the second branch; the first branch circuit is opened and the second branch circuit is closed when the first air temperature is less than or equal to the second air temperature; and when the first air temperature is higher than the second air temperature, the second branch is opened and the first branch is closed. The high-temperature air generated in the running process of the engine is utilized to heat the hydrogen through the hydrogen heat exchanger, extra heating equipment is not needed, the waste heat of the engine is effectively utilized, the efficiency of the engine is improved, the overall power consumption of the engine is reduced, and the cost is saved.
Exemplary method
Referring to fig. 3, a flow chart of a method for heating hydrogen gas for a hydrogen fuel cell engine according to an embodiment of the present application is shown.
The system applying the method comprises the following steps: the system comprises a controller, a first branch, a second branch, an air compressor, a humidifier and a hydrogen heat exchanger;
the controller is configured to receive a first air temperature at an outlet of the air compressor and to receive a second air temperature at an outlet of the wet side of the humidifier;
a first end of the first branch is connected with the air compressor and flows through the wet side of the humidifier; the second end of the first branch is connected with the hydrogen heat exchanger;
the first end of the second branch is connected with the air compressor; the second end of the second branch is connected with the hydrogen heat exchanger;
the controller is connected with the first branch and the second branch;
the method comprises the following steps:
s101: when the first air temperature is less than or equal to the second air temperature, opening the first branch and closing the second branch;
s102: when the first air temperature is greater than the second air temperature, the second branch is opened and the first branch is closed.
In one possible implementation, the opening and closing of the first branch and the second branch are controlled by a three-way valve; the method further comprises the following steps:
the first end of the three-way valve is connected with the wet side of the humidifier; the second end of the three-way valve is connected with the air compressor; the third end of the three-way valve is connected with the hydrogen heat exchanger;
when the first air temperature is less than or equal to the second air temperature, opening the first end and the third end, and closing the second end;
and when the first air temperature is higher than the second air temperature, opening the second end and the third end, and closing the first end.
In one possible implementation, the temperature is monitored by a first temperature sensor and a second temperature sensor; the method further comprises the following steps:
monitoring the first air temperature by the first temperature sensor;
monitoring the second air temperature with the second temperature sensor.
The embodiment of the application provides a method for heating hydrogen by a hydrogen fuel cell engine, and a system applying the method comprises the following steps: the system comprises a controller, a first branch, a second branch, an air compressor, a humidifier and a hydrogen heat exchanger; the controller is used for receiving a first air temperature at an outlet of the air compressor and receiving a second air temperature at an outlet of a wet side of the humidifier; the first end of the first branch is connected with the air compressor and flows through the wet side of the humidifier; the second end of the first branch is connected with a hydrogen heat exchanger; the first end of the second branch is connected with an air compressor; the second end of the second branch is connected with a hydrogen heat exchanger; the controller is connected with the first branch and the second branch; the first branch circuit is opened and the second branch circuit is closed when the first air temperature is less than or equal to the second air temperature; and when the first air temperature is higher than the second air temperature, the second branch is opened and the first branch is closed. The high-temperature air generated in the running process of the engine is utilized to heat the hydrogen through the hydrogen heat exchanger, extra heating equipment is not needed, the waste heat of the engine is effectively utilized, the efficiency of the engine is improved, the overall power consumption of the engine is reduced, and the cost is saved.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the method embodiments are substantially similar to the system embodiments, so that the description is simple, and reference may be made to some descriptions of the method embodiments for relevant points.
The foregoing is merely a preferred embodiment of the present application and, although the present application discloses the foregoing preferred embodiments, the present application is not limited thereto. Those skilled in the art can now make numerous possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments, using the methods and techniques disclosed above, without departing from the scope of the claimed embodiments. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still fall within the protection scope of the technical solution of the present application without departing from the content of the technical solution of the present application.
Claims (10)
1. A system for heating hydrogen gas by a hydrogen fuel cell engine, comprising: the system comprises a controller, a first branch, a second branch, an air compressor, a humidifier and a hydrogen heat exchanger;
the controller is configured to receive a first air temperature at an outlet of the air compressor and to receive a second air temperature at an outlet of the wet side of the humidifier;
a first end of the first branch is connected with the air compressor and flows through the wet side of the humidifier; the second end of the first branch is connected with the hydrogen heat exchanger;
the first end of the second branch is connected with the air compressor; the second end of the second branch is connected with the hydrogen heat exchanger;
the controller is connected with the first branch and the second branch; for opening the first branch and closing the second branch when the first air temperature is less than or equal to the second air temperature; when the first air temperature is greater than the second air temperature, the second branch is opened and the first branch is closed.
2. The system of claim 1, further comprising: an intercooler;
the first end of the intercooler is connected with the hydrogen heat exchanger and used for cooling air flowing through the hydrogen heat exchanger.
3. The system of claim 2, further comprising: a drainage switch;
the drainage switch is connected with the first branch and the second branch; for opening the first branch and closing the second branch when the first air temperature is less than or equal to the second air temperature; when the first air temperature is greater than the second air temperature, the second branch is opened and the first branch is closed.
4. The system of claim 3, wherein the drain switch comprises: a three-way valve;
the first end of the three-way valve is connected with the wet side of the humidifier; the second end of the three-way valve is connected with the air compressor; the third end of the three-way valve is connected with the hydrogen heat exchanger;
the three-way valve is used for opening the first end and the third end and closing the second end when the first air temperature is less than or equal to the second air temperature; and when the first air temperature is higher than the second air temperature, opening the second end and the third end, and closing the first end.
5. The system of claim 4, further comprising: the first switch valve, the second switch valve, the third switch valve and the fourth switch valve;
the first end of the intercooler is connected with the hydrogen heat exchanger through the second switch valve; the second end of the intercooler is connected with the air compressor through the first switch valve; the third end of the intercooler is connected with the dry side of the humidifier;
one end of the third switch valve is connected with the hydrogen heat exchanger, and the other end of the third switch valve is connected with the tail row;
one end of the fourth switch valve is connected with the wet side of the humidifier, and the other end of the fourth switch valve is connected with the tail row;
when the first air temperature is less than or equal to the second air temperature, opening the first and third on-off valves and closing the second and fourth on-off valves;
when the first air temperature is greater than the second air temperature, the second and fourth switching valves are opened, and the first and third switching valves are closed.
6. The system according to any one of claims 1-5, further comprising: a hydrogen fuel cell stack;
one end of the hydrogen fuel cell stack is connected with the hydrogen heat exchanger; the other end is connected with the humidifier.
7. The system according to any one of claims 1-5, further comprising: a first temperature sensor and a second temperature sensor;
the first temperature sensor and the second temperature sensor are connected with the controller;
the first temperature sensor is used for monitoring the first air temperature;
the second temperature sensor is used for monitoring the second air temperature;
the controller is configured to receive the first air temperature and the second air temperature.
8. A method for heating hydrogen gas by a hydrogen fuel cell engine is characterized in that a system applying the method comprises the following steps: the system comprises a controller, a first branch, a second branch, an air compressor, a humidifier and a hydrogen heat exchanger;
the controller is configured to receive a first air temperature at an outlet of the air compressor and to receive a second air temperature at an outlet of the wet side of the humidifier;
a first end of the first branch is connected with the air compressor and flows through the wet side of the humidifier; the second end of the first branch is connected with the hydrogen heat exchanger;
the first end of the second branch is connected with the air compressor; the second end of the second branch is connected with the hydrogen heat exchanger;
the controller is connected with the first branch and the second branch;
the method comprises the following steps:
when the first air temperature is less than or equal to the second air temperature, opening the first branch and closing the second branch;
when the first air temperature is greater than the second air temperature, the second branch is opened and the first branch is closed.
9. The method of claim 8, wherein the opening and closing of the first and second branches is controlled by a three-way valve; the method further comprises the following steps:
the first end of the three-way valve is connected with the wet side of the humidifier; the second end of the three-way valve is connected with the air compressor; the third end of the three-way valve is connected with the hydrogen heat exchanger;
when the first air temperature is less than or equal to the second air temperature, opening the first end and the third end, and closing the second end;
and when the first air temperature is higher than the second air temperature, opening the second end and the third end, and closing the first end.
10. The method of claims 8-9, wherein the temperature is monitored by a first temperature sensor and a second temperature sensor; the method further comprises the following steps:
monitoring the first air temperature by the first temperature sensor;
monitoring the second air temperature with the second temperature sensor.
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