CN117878351A - Thermal management device of fixed hydrogen fuel cell power station and low-temperature starting method - Google Patents
Thermal management device of fixed hydrogen fuel cell power station and low-temperature starting method Download PDFInfo
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- CN117878351A CN117878351A CN202410284603.2A CN202410284603A CN117878351A CN 117878351 A CN117878351 A CN 117878351A CN 202410284603 A CN202410284603 A CN 202410284603A CN 117878351 A CN117878351 A CN 117878351A
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- cell stack
- stack module
- cooling liquid
- temperature
- module
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000001257 hydrogen Substances 0.000 title claims abstract description 27
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000000446 fuel Substances 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000000110 cooling liquid Substances 0.000 claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 239000002826 coolant Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Abstract
The invention relates to the field of fuel cells, in particular to a thermal management device and a low-temperature starting method of a fixed hydrogen fuel cell power station, which comprise a plurality of cell stack modules; further comprises: the temperature sensor a is arranged on a cooling liquid outlet pipeline of the cell stack module, and an electric three-way valve is arranged on the pipeline; a temperature sensor b disposed on the cooling liquid inlet line of the stack module; a water pump injecting a cooling liquid into a cooling liquid inlet of the cell stack module through a pipe; the PTC heater is connected to the water inlet of the water pump, and the other end of the PTC heater is connected to one end of the electric three-way valve after water is discharged; and one end of the radiator is connected with the water inlet of the water pump, and the other end of the radiator is connected with the other end of the electric three-way valve after water is discharged. According to the invention, the heat generated by the operation of the cell stack module a is utilized to heat the cooling liquid of other cell stack modules together with the PTC heater, so that the energy consumption of the system in the low-temperature starting process is reduced, the starting time is shortened, and the system efficiency is improved.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a thermal management device and a low-temperature starting method of a fixed hydrogen fuel cell power station.
Background
With the development of hydrogen energy technology, fuel cell stacks are widely used in the fields of automobiles, power stations, and the like. However, the low temperature environment presents significant challenges to the start-up and operation of the fuel cell stack. At low temperatures, it is difficult for the fuel cell stack to reach the desired operating temperature, which can lead to reduced efficiency, reduced life and even damage. Therefore, it is necessary to ensure that the fuel cell stack can quickly reach a suitable operating temperature.
At present, the heating mode is used for independently heating through the PTC heater, the temperature rising efficiency of the battery stack cooling liquid is low, and the overall heating energy consumption is high.
Disclosure of Invention
The invention aims to solve the problems of low heating efficiency and high heating energy consumption in the prior art that the cooling liquid of a cell stack is heated entirely only by PTC, and provides a thermal management device and a low-temperature starting method of a fixed hydrogen fuel cell power station.
In one aspect, the present invention provides a thermal management device for a stationary hydrogen fuel cell power plant, comprising a plurality of stack modules; further comprises:
the temperature sensor a is arranged on a cooling liquid outlet pipeline of the cell stack module and used for monitoring the temperature of cooling liquid flowing out of the cell stack module, and an electric three-way valve is arranged on the pipeline;
a temperature sensor b disposed on the cooling liquid inlet line of the stack module for monitoring the temperature of the cooling liquid flowing into the stack module;
a water pump for injecting cooling liquid into a cooling liquid inlet of the cell stack module through a pipeline, wherein a power valve is arranged on the pipeline;
the PTC heater is connected to the water inlet of the water pump, and the other end of the PTC heater is connected to one end of the electric three-way valve after water is discharged;
and the radiator is used for reducing the temperature of the cooling liquid, one end of the radiator is connected with the water inlet of the water pump, and the other end of the radiator is connected with the other end of the electric three-way valve after water is discharged.
Preferably, the stack module includes:
a cell stack;
an air unit connected with the cell stack for providing oxygen for the cell stack;
the hydrogen supply unit is connected with the cell stack and used for supplying hydrogen to the cell stack;
and the power control unit is connected with the anode and the cathode of the battery stack and used for controlling and adjusting the voltage and the current of the battery stack.
Preferably, the radiator also comprises a liquid storage tank, wherein a water outlet at the lower end of the liquid storage tank is connected to a water inlet of the water pump and an outlet pipeline of the radiator, and a reflux port is connected to an exhaust port of the radiator.
Preferably, the three groups of battery pile modules are respectively a battery pile module a, a battery pile module b and a battery pile module c, the cooling liquid inlets of the three groups of battery pile modules are all connected with the water outlet of the water pump, and the cooling liquid outlets of the three groups of battery pile modules are all connected with the water inlet of the electric three-way valve.
In another aspect, the present invention provides a method for starting a thermal management device of a stationary hydrogen fuel cell power plant at low temperature, comprising the steps of:
s1, after the system is started, the thermal management system detects whether the temperatures of all the temperature sensors a and b are lower than 5 ℃, if all the detected temperatures are lower than 5 ℃, the system executes a low-temperature starting process, otherwise, normal-temperature starting is started;
s2, starting a low-temperature starting flow, wherein the system can set the opening degree of a power valve in a cell stack module a to be A1, the opening degree of the power valves in a cell stack module b and a cell stack module c to be 0%, the opening degree of an electric three-way valve to be 0%, the opening degree of a PTC heater to be 100%, and the opening degree of a radiator to be 0%;
s3, starting the water pump, setting the rotating speed of the water pump to be B1, and simultaneously, opening the PTC heater by the system to provide necessary heating effect;
s4, when the temperature sensor a and the temperature sensor b in the cell stack module a detect that the temperature is higher than 5 ℃, the system starts an air unit, a hydrogen supply unit and a power control unit of the cell stack and enables the cell stack to operate at power P1;
s5, when the temperature sensor B in the cell stack module a detects that the temperature is greater than T1, the system adjusts the rotating speed of the water pump to B2, and sets the opening degree of the power valves in the cell stack module B and the cell stack module C to be A1, and the cell stack in the cell stack module a keeps the system operating normally and operates at power P1, wherein T1 is more than 5 ℃, and B2 is more than B1;
s6, when the temperature sensors a in the cell stack module b and the cell stack module C detect that the temperatures are more than 5 ℃, the system starts an air unit, a hydrogen supply unit and a power control unit of the cell stacks in the cell stack module b and the cell stack module C, and enables the cell stacks to operate at power P1;
s7, closing the PTC heater by the system to finish the low-temperature starting process.
Compared with the prior art, the invention has the following beneficial technical effects:
1. the energy consumption is reduced: by utilizing the heat generated by the operation of the cell stack module a and the PTC heater to heat the cooling liquid of other cell stack modules together, the electric energy and power consumption required by independently using the PTC heater is reduced, and the energy consumption of the system in the low-temperature starting process is effectively reduced.
2. Shortening the starting time: the heat generated by the operation of the cell stack module a and the PTC heater are used for heating the cooling liquid of other cell stack modules together, so that the whole system can reach the temperature condition required by starting more quickly, and compared with the method adopting the PTC heater alone, the method can shorten the heating time in the low-temperature starting process.
3. The system efficiency is improved: the heat generated by the operation of the cell stack module a is reasonably utilized to heat the cooling liquid of other cell stack modules, so that the energy utilization efficiency of the whole system is effectively improved, the system performance is optimized, and the overall efficiency of the fuel cell power station is improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
fig. 2 is a flow chart of a low-temperature start-up method according to the present invention.
Reference numerals: 1. a cell stack; 2. an air unit; 3. a hydrogen supply unit; 4. a power control unit; 5. a temperature sensor a; 6. a temperature sensor b; 7. a power valve; 8. a water pump; 9. an electric three-way valve; 10. a PTC heater; 11. a heat sink; 12. and a liquid storage tank.
Detailed Description
In an embodiment, as shown in fig. 1, the thermal management device of a stationary hydrogen fuel cell power station according to the present invention includes a plurality of stack modules; further comprises:
a temperature sensor a5, which is arranged on a cooling liquid outlet pipeline of the cell stack module and is used for monitoring the temperature of the cooling liquid flowing out of the cell stack module, and an electric three-way valve 9 is arranged on the pipeline;
a temperature sensor b6 disposed on the cooling liquid inlet line of the stack module for monitoring the temperature of the cooling liquid flowing into the stack module;
a water pump 8 for injecting cooling liquid into a cooling liquid inlet of the cell stack module through a pipeline, wherein a power valve 7 is arranged on the pipeline;
the PTC heater 10 is used for increasing the temperature of the cooling liquid through a heating effect, the PTC heater 10 is connected to the water inlet of the water pump 8, and the other end of the PTC heater is connected to one end of the electric three-way valve 9 after water is discharged;
a radiator 11 for reducing the temperature of the cooling liquid, one end of which is connected with the water inlet of the water pump 8, and the other end of which is connected with the other end of the electric three-way valve 9 after water is discharged;
and a water outlet at the lower end of the liquid storage tank 12 is connected to a water inlet of the water pump 8 and an outlet pipeline of the radiator 11, and a reflux port is connected to an exhaust port of the radiator 11.
Further, the cell stack module includes:
a cell stack 1;
an air unit 2 connected to the cell stack 1 for supplying oxygen to the cell stack 1;
a hydrogen supply unit 3 connected to the cell stack 1 for supplying hydrogen to the cell stack 1;
and a power control unit 4 connected with the positive electrode and the negative electrode of the cell stack 1 for controlling and adjusting the voltage and current of the cell stack 1.
The three groups of battery pile modules are respectively a battery pile module a, a battery pile module b and a battery pile module c, the cooling liquid inlets of the three groups of battery pile modules are all connected with the water outlet of the water pump 8, and the cooling liquid outlets of the three groups of battery pile modules are all connected with the water inlet of the electric three-way valve 9.
In the present embodiment, the temperature of the coolant of the stack module a is raised by using the PTC heater 10 to achieve the temperature condition required for the start-up. After the stack module a is successfully started, the heat generated in the operation process and the PTC heater 10 are utilized to heat the cooling liquid of other stack modules together, so that the low-temperature start of the whole system is realized. Such a thermal management device has the following advantages over the scheme employing the PTC heater 10 alone:
the energy consumption is reduced: by utilizing the heat generated by the operation of the stack module a to heat the coolant of the other stack modules together with the PTC heater 10, the electrical power consumption required for the PTC heater 10 alone is reduced, which effectively reduces the energy consumption of the system during low temperature start-up.
Shortening the starting time: the heat generated by the operation of the cell stack module a and the PTC heater 10 are utilized to heat the cooling liquid of other cell stack modules together, so that the whole system can reach the temperature condition required by starting more quickly, and compared with the method adopting the PTC heater 10 alone, the method can shorten the heating time in the low-temperature starting process.
The system efficiency is improved: the heat generated by the operation of the cell stack module a is reasonably utilized to heat the cooling liquid of other cell stack modules, so that the energy utilization efficiency of the whole system is effectively improved, the system performance is optimized, and the overall efficiency of the fuel cell power station is improved.
In a second embodiment, as shown in fig. 2, a low-temperature start-up method based on the above embodiment of a thermal management device of a stationary hydrogen fuel cell power station includes the following steps:
s1, after the system is started, the thermal management system detects whether the temperatures of all the temperature sensors a5 and b6 are lower than 5 ℃, if all the detected temperatures are lower than 5 ℃, the system executes a low-temperature starting process, otherwise, normal-temperature starting is started;
s2, starting a low-temperature starting flow, wherein the system can set the opening degree of a power valve 7 in a cell stack module a to be A1, the opening degree of the power valves 7 in a cell stack module b and a cell stack module c to be 0%, the opening degree of an electric three-way valve 9 to be 0%, the opening degree of a PTC heater 10 to be 100% and the opening degree of a radiator 11 to be 0%;
s3, starting the water pump 8, setting the rotating speed of the water pump to be B1, and simultaneously, turning on the PTC heater 10 by the system to provide necessary heating effect;
s4, when the temperature sensor a5 and the temperature sensor b6 in the cell stack module a detect that the temperature is higher than 5 ℃, the system starts the air unit 2, the hydrogen supply unit 3 and the power control unit 4 of the cell stack 1 and enables the cell stack 1 to operate at the power P1;
s5, when the temperature sensor B6 in the cell stack module a detects that the temperature is greater than T1, the system adjusts the rotating speed of the water pump 8 to B2, and sets the opening degree of the power valve 7 in the cell stack module B and the cell stack module C to be A1, and the cell stack 1 in the cell stack module a keeps the system operating normally and operates at the power P1, wherein T1 is more than 5 ℃, and B2 is more than B1;
s6, when the temperature sensors a5 in the cell stack module b and the cell stack module C detect that the temperatures are more than 5 ℃, the system starts the air unit 2, the hydrogen supply unit 3 and the power control unit 4 of the cell stack 1 in the cell stack module b and the cell stack module C, and enables the cell stack 1 to operate at the power P1;
s7, closing the PTC heater 10 by the system, and completing a low-temperature starting process.
In the embodiment, the method flow can effectively ensure that the system is started smoothly in a low-temperature environment, gradually reaches a normal running state, and ensures the stability and reliability of the system.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (5)
1. A thermal management device of a stationary hydrogen fuel cell power plant includes a plurality of stack modules; characterized by further comprising:
a temperature sensor a (5) which is arranged on a cooling liquid outlet pipeline of the cell stack module and used for monitoring the temperature of cooling liquid flowing out of the cell stack module, and an electric three-way valve (9) is arranged on the pipeline;
a temperature sensor b (6) provided on the cooling liquid inlet line of the stack module for monitoring the temperature of the cooling liquid flowing into the stack module;
a water pump (8) for injecting cooling liquid into a cooling liquid inlet of the cell stack module through a pipeline, wherein a power valve (7) is arranged on the pipeline;
the PTC heater (10) is used for increasing the temperature of the cooling liquid through the heating effect, the PTC heater (10) is connected to the water inlet of the water pump (8), and the other end of the PTC heater is connected to one end of the electric three-way valve (9) after water is discharged;
and the radiator (11) is used for reducing the temperature of the cooling liquid, one end of the radiator is connected with the water inlet of the water pump (8), and the other end of the radiator is connected with the other end of the electric three-way valve (9) after water is discharged.
2. The thermal management apparatus of a stationary hydrogen fuel cell power plant of claim 1, wherein the stack module comprises:
a cell stack (1);
an air unit (2) connected with the cell stack (1) for supplying oxygen to the cell stack (1);
a hydrogen supply unit (3) connected with the cell stack (1) for supplying hydrogen to the cell stack (1);
and the power control unit (4) is connected with the anode and the cathode of the cell stack (1) and is used for controlling and regulating the voltage and the current of the cell stack (1).
3. The thermal management device of a stationary hydrogen fuel cell power plant according to claim 2, further comprising a liquid storage tank (12), wherein a water outlet at a low end of the liquid storage tank (12) is connected to a water inlet of the water pump (8) and an outlet line of the radiator (11), and wherein the return port is connected to an exhaust port of the radiator (11).
4. A thermal management device for a stationary hydrogen fuel cell power plant according to claim 3, wherein the stack modules are arranged in three groups, namely stack module a, stack module b and stack module c, the cooling liquid inlets of the three groups of stack modules are all connected with the water outlet of the water pump (8), and the cooling liquid outlets of the three groups of stack modules are all connected with the water inlet of the electric three-way valve (9).
5. A method of low temperature start-up of a thermal management device for a stationary hydrogen-fuel cell power plant according to claim 4, comprising the steps of:
s1, after the system is started, the thermal management system detects whether the temperatures of all the temperature sensors a (5) and b (6) are lower than 5 ℃, if all the detected temperatures are lower than 5 ℃, the system executes a starting flow, otherwise, normal-temperature starting is started;
s2, starting a starting flow, wherein the system can set the opening degree of a power valve (7) in a cell stack module a to be A1, the opening degree of the power valve (7) in a cell stack module b and a cell stack module c to be 0%, the opening degree of an electric three-way valve (9) to be 0%, the opening degree of a PTC heater (10) to be 100% and the opening degree of a radiator (11) to be 0%;
s3, starting the water pump (8) and setting the rotating speed of the water pump to be B1, and simultaneously, turning on the PTC heater (10) by the system to provide a heating effect;
s4, when the temperature sensor a (5) and the temperature sensor b (6) in the battery stack module a detect that the temperature is higher than 5 ℃, the system starts an air unit (2), a hydrogen supply unit (3) and a power control unit (4) of the battery stack (1), and enables the battery stack (1) to operate at power P1;
s5, when a temperature sensor B (6) in a cell stack module a detects that the temperature is greater than T1, the system adjusts the rotating speed of a water pump (8) to B2, and sets the opening degree of a power valve (7) in the cell stack module B and a cell stack module C to be A1, and the cell stack (1) in the cell stack module a keeps the system to normally operate and operates at power P1, wherein T1 is more than 5 ℃ and B2 is more than B1;
s6, when the temperature sensors a (5) in the cell stack module b and the cell stack module C detect that the temperatures are higher than 5 ℃, the system starts an air unit (2), a hydrogen supply unit (3) and a power control unit (4) of the cell stack (1) in the cell stack module b and the cell stack module C, and enables the cell stack (1) to operate at power P1;
s7, closing the PTC heater (10) by the system, and completing the starting process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410284603.2A CN117878351A (en) | 2024-03-13 | 2024-03-13 | Thermal management device of fixed hydrogen fuel cell power station and low-temperature starting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410284603.2A CN117878351A (en) | 2024-03-13 | 2024-03-13 | Thermal management device of fixed hydrogen fuel cell power station and low-temperature starting method |
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| Publication Number | Publication Date |
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| CN117878351A true CN117878351A (en) | 2024-04-12 |
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| CN202410284603.2A Pending CN117878351A (en) | 2024-03-13 | 2024-03-13 | Thermal management device of fixed hydrogen fuel cell power station and low-temperature starting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113972389A (en) * | 2021-10-26 | 2022-01-25 | 上海重塑能源科技有限公司 | Water heat management integrated device of multi-stack fuel cell system and working method thereof |
| CN115275264A (en) * | 2022-07-22 | 2022-11-01 | 上海卓微氢科技有限公司 | Multi-stack fuel cell cooling system and control method |
| CN115275263A (en) * | 2022-07-22 | 2022-11-01 | 上海卓微氢科技有限公司 | Multi-stack fuel cell cooling system with high energy utilization rate and water heat management method |
| CN217740586U (en) * | 2022-05-27 | 2022-11-04 | 未势能源科技有限公司 | Fuel cell system, fuel cell engine and new energy automobile |
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- 2024-03-13 CN CN202410284603.2A patent/CN117878351A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113972389A (en) * | 2021-10-26 | 2022-01-25 | 上海重塑能源科技有限公司 | Water heat management integrated device of multi-stack fuel cell system and working method thereof |
| CN217740586U (en) * | 2022-05-27 | 2022-11-04 | 未势能源科技有限公司 | Fuel cell system, fuel cell engine and new energy automobile |
| CN115275264A (en) * | 2022-07-22 | 2022-11-01 | 上海卓微氢科技有限公司 | Multi-stack fuel cell cooling system and control method |
| CN115275263A (en) * | 2022-07-22 | 2022-11-01 | 上海卓微氢科技有限公司 | Multi-stack fuel cell cooling system with high energy utilization rate and water heat management method |
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