CN112582653A - Hydrogen precooling system and method for hydrogen fuel cell testing device - Google Patents
Hydrogen precooling system and method for hydrogen fuel cell testing device Download PDFInfo
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- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04701—Temperature
- H01M8/04708—Temperature of fuel cell reactants
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
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- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0432—Temperature; Ambient temperature
- H01M8/04328—Temperature; Ambient temperature of anode reactants at the inlet or inside the fuel cell
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- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0432—Temperature; Ambient temperature
- H01M8/04343—Temperature; Ambient temperature of anode exhausts
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- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
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- H01M8/04388—Pressure; Ambient pressure; Flow of anode reactants at the inlet or inside the fuel cell
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The application relates to a hydrogen precooling system and a hydrogen precooling method for a hydrogen fuel cell testing device, wherein the hydrogen precooling system comprises a controller; the heat exchange assembly comprises a heat exchange cabin and a heat exchange tube, and the heat exchange tube is provided with an air inlet and an air outlet on the side wall of the heat exchange cabin; the temperature control circulation assembly comprises a gas circulation pipeline, a refrigerator, a first air pump and a second air pump, wherein two ends of the gas circulation pipeline are respectively communicated with the heat exchange cabin to form a heating circulation loop and a refrigerating circulation loop; the temperature detection assembly is configured to be a first temperature sensor and a second temperature sensor, the first temperature sensor collects the temperature in the heat exchange cabin and outputs a first temperature detection signal, and the second temperature sensor collects the temperature of the heat exchange pipe at the air outlet and outputs a second temperature detection signal. The explosion-proof device has the advantages of simplified structure and small occupied space, and an independent electric explosion-proof device is not required to be arranged; meanwhile, the accuracy of temperature control in the hydrogen precooling treatment process can be improved on the premise of ensuring the hydrogen flow.
Description
Technical Field
The application relates to the technical field of fuel cells, in particular to a hydrogen precooling system and a hydrogen precooling method for a hydrogen fuel cell testing device.
Background
A hydrogen fuel cell is a power generation device that directly converts chemical energy of hydrogen and oxygen into electrical energy.
The battery comprises a positive electrode and a negative electrode which are respectively filled with electrolyte, and a permeable film is arranged between the two electrodes. Hydrogen enters from the anode of the fuel cell, oxygen (or air) enters from the cathode of the fuel cell, and the temperature of the hydrogen needs to be controlled within a certain set interval before the hydrogen is introduced into the fuel cell.
In view of the above-mentioned related technologies, the inventor believes that the introduction of hydrogen needs to be controlled within a certain temperature range, pre-cooling treatment needs to be performed before the introduction of hydrogen, most pre-cooling treatment systems have complex structures and need to be provided with independent explosion-proof devices for electrical apparatuses, and it is difficult to ensure that the hydrogen introduced in real time can be within the required temperature range during the pre-cooling treatment process, and even the accuracy of temperature control cannot be performed under the condition of stable hydrogen flow, which is easy to affect the use performance of the hydrogen fuel cell.
Disclosure of Invention
In order to simplify the structure of the hydrogen precooling system for the hydrogen fuel cell testing device, occupy small space and avoid the need of arranging an independent electric explosion-proof device; meanwhile, on the premise of ensuring the hydrogen flow rate, the accuracy of temperature control in the hydrogen precooling treatment process is improved.
In a first aspect, the present application provides a hydrogen precooling system for a hydrogen fuel cell testing apparatus, which adopts the following technical scheme:
a hydrogen gas pre-cooling system for a hydrogen fuel cell testing device, comprising:
a controller;
the heat exchange assembly comprises a heat exchange cabin and a heat exchange tube which is arranged in the heat exchange cabin in a penetrating way, wherein an air inlet and an air outlet are formed on the side wall of the heat exchange cabin of the heat exchange tube;
the temperature control circulating assembly comprises at least one gas circulating pipeline, and a refrigerator, a heater, a first air pump and a second air pump which are communicated with the gas circulating pipeline, the refrigerator, the heater, the first air pump and the second air pump are all in control connection with the controller, and two ends of the gas circulating pipeline are respectively communicated with the heat exchange cabin to form a heating circulating loop and a refrigerating circulating loop;
the temperature detection assembly is configured to be in signal connection with the controller, a first temperature sensor is arranged in the heat exchange cabin, and a second temperature sensor is arranged at the air outlet, the first temperature sensor collects the temperature in the heat exchange cabin and outputs a first temperature detection signal, and the second temperature sensor collects the temperature of the heat exchange tube at the air outlet and outputs a second temperature detection signal;
the controller receives the first temperature detection signal and the second temperature detection signal, and outputs control signals to control the actions of the refrigerator, the heater, the first air pump and the second air pump based on a set processing algorithm.
Through adopting above-mentioned technical scheme, when using hydrogen precooling system, install the heat exchange tube in the heat transfer cabin in the heat exchange assembly, in the hydrogen that will need the precooling lets in the heat exchange tube from the air inlet department in heat transfer cabin, hydrogen accomplishes the heat transfer in the heat exchange tube, discharges from the gas vent again. Gaseous heat exchange media exist in the heat exchange cabin, and the temperature in the heat exchange cabin is circularly controlled through a temperature control circulating component; a temperature control circulation assembly is communicated and arranged in the heat exchange cabin, a first air pump and a second air pump heat exchange media in the heat exchange cabin into the air circulation pipeline, and the heat exchange media are cooled by a refrigerator or heated by a heater and then are circulated and introduced into the heat exchange cabin. A first temperature sensor in the temperature detection assembly can detect and acquire a temperature value in the heat exchange cabin and send a first temperature detection signal; and the hydrogen temperature value after precooling treatment at the air outlet can be detected and collected through the second temperature sensor, and a second temperature detection signal is output. After receiving the first temperature detection signal and the second temperature detection signal, the controller judges based on a set processing algorithm, and if the temperature in the heat exchange cabin is too high or even too low, or the temperature of the hydrogen at the exhaust port is higher or even lower than a target temperature, the controller outputs a control signal to control the operation of the temperature control circulation component after receiving the first temperature detection signal and the second temperature detection signal, so that the accuracy of temperature control is improved. The temperature control circulation component and the heat exchange component are arranged separately, so that an independent electric explosion-proof device is not required to be arranged, and the use safety is improved; meanwhile, the structure of the system is simplified, and the occupied space of the whole hydrogen precooling system is smaller.
Optionally, the heat exchange tube is configured as a heat exchange coil, and fins are arranged on the heat exchange coil.
Through adopting above-mentioned technical scheme, when using hydrogen precooling system, set up the heat exchange tube in the heat transfer cabin into heat exchange coil, set up a plurality of fins simultaneously on heat exchange coil, so set up the heat exchange area that the homoenergetic can increase heat exchange tube table lateral wall, improve the speed of heat exchange, make the effect of heat exchange better.
Optionally, the controller is connected to an alarm device, the controller receives control feedback signals of the refrigerator and the first air pump, and a first temperature detection signal and a second temperature detection signal, and outputs an alarm signal to the alarm device when the signals exceed a set range.
By adopting the technical scheme, when the hydrogen precooling system is used, the controller can receive the control feedback signal of the refrigerator and the first air pump, the first temperature detection signal and the second temperature detection signal, when the refrigerator or the first air pump has a fault problem in the use process, the controller can send the control feedback signal, and the controller sends an alarm signal after receiving the control feedback signal, so that the alarm device gives an alarm; when the temperature in the heat exchange cabin or the temperature of the hydrogen output from the exhaust port is higher than or lower than a set temperature range value, the controller receives the first temperature detection signal and the second temperature detection signal and then sends out an alarm signal to enable the alarm device to give an alarm.
Optionally, the gas circulation pipeline is provided with a first flow rate detection assembly, which is used for detecting the flow rate of gas in the gas circulation pipeline and outputting a first flow rate detection signal;
the first flow rate detection assembly is in signal connection with the controller;
the controller receives and responds to the first flow speed detection signal to control the action of the temperature control circulating assembly or the alarm device.
By adopting the technical scheme, when the hydrogen precooling system is used, the gas flow velocity in the gas circulation pipeline can be detected by the first flow velocity detection assembly, and a first flow velocity detection signal is output, and after the controller receives the first flow velocity detection signal, the refrigerating power of a refrigerator in the temperature control circulation assembly is correspondingly controlled by judging the cold gas flow velocity; when the rapid decrease of the cold air flow speed is detected and the temperature control circulation assembly breaks down, the controller can control the alarm device to give an alarm.
Optionally, a second flow rate detection assembly in signal connection with the controller is arranged at the air inlet, and the second flow rate detection assembly detects the hydrogen flow rate at the air inlet and outputs a second flow rate detection signal;
and the controller receives the second flow rate detection signal, and outputs a control signal to control the actions of the refrigerator and the first air pump based on a set processing algorithm.
By adopting the technical scheme, when the hydrogen precooling system is used, the hydrogen flow rate at the air inlet can be detected through the second flow rate detection assembly and a corresponding second flow rate detection signal is output, and if the flow rate at the air inlet is increased or decreased to some extent, the controller outputs a control signal to control the refrigeration power and/or the gas pumping power of the temperature control circulation assembly in time after receiving the second flow rate detection signal, so that the accuracy of the hydrogen precooling system on temperature control is improved.
Optionally, a third temperature sensor in signal connection with the controller is arranged at the air inlet, and the third temperature sensor collects the temperature of the heat exchange tube at the air inlet and outputs a third temperature detection signal; and the controller receives the third temperature detection signal, and outputs a control signal to control the actions of the refrigerator and the first air pump based on a set processing algorithm.
By adopting the technical scheme, when the hydrogen precooling system is used, the temperature of hydrogen at the air inlet which is not subjected to precooling treatment can be detected through the third temperature sensor, and a corresponding third temperature detection signal is output, when the temperature of the hydrogen input at the air inlet changes, the controller needs to make corresponding adjustment on the temperature control circulation assembly after receiving the third temperature detection signal, and the controller outputs a control signal so as to control the refrigerating power and/or the gas pumping power of the temperature control circulation assembly. The corresponding temperature control circulation assembly is obtained by collecting the hydrogen temperature which is not subjected to precooling in advance, so that the accuracy of the hydrogen precooling system on temperature control can be improved more accurately.
In a second aspect, the present application provides a hydrogen precooling method for a hydrogen fuel cell testing apparatus, which adopts the following technical scheme:
a hydrogen precooling method for a hydrogen fuel cell testing device comprises the following steps:
acquiring the temperature of hydrogen at an exhaust port to generate a detection temperature value;
adjusting the refrigeration power and/or gas pumping power of the temperature control circulation component based on the difference value between the detected temperature value and the set target temperature value;
if the difference value is regular, the controller outputs a control signal to improve the refrigeration power and/or the gas pumping power of the temperature control circulation component;
and if the difference is negative, the controller outputs a control signal to reduce the refrigerating power and/or the gas pumping power of the temperature control circulation component.
By adopting the technical scheme, when the hydrogen is precooled, the temperature of the hydrogen after precooling at the air outlet is firstly obtained, the obtained detection temperature value and the target temperature value are subjected to subtraction processing, the temperature difference value is calculated, if the difference value is positive, the temperature of the hydrogen after precooling is higher than the target temperature, the refrigeration power and/or the gas pumping power of the temperature control circulation component are/is improved by the controller, and the heat exchange cabin is rapidly cooled, so that the precooling temperature of the hydrogen is reduced. If the difference is negative, the temperature of the hydrogen after the pre-cooling treatment is lower than the target temperature, and the refrigeration power and/or the gas pumping power of the temperature control circulation assembly are/is reduced by the controller, so that the pre-cooling temperature of the hydrogen can be increased. The temperature control circulation assembly is controlled in time according to the difference value between the detected temperature value and the set target temperature value, and the accuracy of temperature control in the hydrogen precooling process can be improved on the premise of ensuring the hydrogen flow.
Optionally, a target temperature interval is defined based on the set target temperature value;
detecting a fluctuation interval of a detected temperature value in a set time period, and acquiring the average refrigerating power and/or gas pumping power of the temperature control circulation assembly in the set time period if the fluctuation interval is located in the target temperature interval;
and keeping the temperature control circulation assembly running at the average refrigerating power.
By adopting the technical scheme, when the hydrogen is precooled, the target temperature is divided into an interval, the temperature values of the hydrogen at the plurality of exhaust ports are obtained within a certain time, and a certain fluctuation interval can be formed by the plurality of detected temperature values; the average refrigeration power and/or gas pumping power of the temperature controlled circulation assembly is also taken over the same period of time. If the detected fluctuation interval falls into the range of the target temperature interval, the temperature control circulation assembly is enabled to continuously keep the average running power in the current time period, and the overall stability of the hydrogen precooling treatment process can be further controlled.
Optionally, a target temperature interval is defined based on the set target temperature value;
detecting a plurality of detected temperature values in a set time period and generating at least one parameter curve reflecting the trend of the detected temperature values;
calculating and generating a predicted value of the detected temperature value at the set moment in the future based on the parameter curve;
and adjusting the refrigerating power and/or the gas pumping power of the temperature control circulation component according to the estimated value.
By adopting the technical scheme, when hydrogen is precooled, the target temperature is divided into an interval, the temperature values of the hydrogen at the plurality of gas outlets are obtained within a certain time, the obtained temperature values can form a parameter curve, if the detected temperature values change gradually, the prejudgment temperature value within a certain time in the future can be prejudged in advance according to the trend of the parameter curve, if the prejudgment temperature value exceeds the target temperature interval, the refrigerating power and/or the gas pumping power of the temperature control circulation component are/is adjusted within a certain time in advance, so that the hydrogen is not easy to exceed the divided target temperature interval during the precooling, and the accuracy of temperature control in the hydrogen precooling process is improved through prejudgment.
Optionally, detecting and generating a hydrogen flow rate value V1 at the air inlet, an initial temperature value T1 at the air inlet, a detected temperature value T2 at the air outlet, and a cabin temperature value T3 in the heat exchange cabin;
establishing a correlation between any one or more of the hydrogen flow rate value V1, the initial temperature value T1, the detected temperature value T2 and the cabin temperature value T3 and the refrigeration power P1 and the gas pumping power P2 in the temperature control circulation assembly;
based on the correlation and the hydrogen flow rate value V1, the initial temperature value T1, the detection temperature value T2 and the cabin temperature value T3 which are acquired in real time, a plurality of refrigeration powers P1, gas pumping powers P2 and combinations thereof are obtained through calculation;
according to the obtained multiple refrigeration powers P1, gas pumping powers P2 and combinations thereof, based on a set algorithm, a target refrigeration power P1, a gas pumping power P2 and combinations thereof are obtained through screening;
the output powers of the refrigerator and the first air pump in the temperature controlled circulation assembly are controlled based on the above target refrigeration power P1, the gas pumping power P2, and a combination thereof.
By adopting the technical scheme, when hydrogen is precooled, any one or more of a detected hydrogen flow rate value V1 of the air inlet, an initial temperature value T1, a detected temperature value T2 and a cabin temperature value T3 in a heat exchange cabin are combined, a certain incidence relation is established between the refrigeration power P1 and the gas pumping power P2 in the temperature control circulation assembly, and a plurality of refrigeration powers P1, gas pumping powers P2 and combinations thereof can be calculated according to the established incidence relation; and screening and retaining the target refrigerating power P1, the gas pumping power P2 and the combination thereof, and controlling the output power of the refrigerator and the first air pump in the temperature control circulation assembly according to the screening result. The arrangement can relate to the change of a plurality of parameter variables of a hydrogen flow rate value V1, an initial temperature value T1, a detection temperature value T2 and a cabin temperature value T3, the temperature control circulation component is adjusted, the accurate adjustment relation between the hydrogen flow rate and the temperature control is realized, the hydrogen flow rate can be ensured, the hydrogen precooling temperature can be accurately controlled, and the whole using effect is good.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the hydrogen precooling system is used, hydrogen to be precooled is introduced into a heat exchange tube of a heat exchange cabin, and a first temperature sensor is used for detecting and acquiring a temperature value in the heat exchange cabin and sending a first temperature detection signal; the second temperature sensor can detect and collect the hydrogen temperature value at the air outlet and output a second temperature detection signal. And after receiving the first temperature detection signal and the second temperature detection signal, the controller judges based on a set processing algorithm, and outputs a control signal to adjust the power of the refrigerator and the first air pump. The temperature control circulation component and the heat exchange component are arranged separately, an independent electric explosion-proof device is not required to be arranged, the use safety is improved, and the structure of the system is simplified;
2. the controller receives control feedback signals of the refrigerator and the first air pump, a first temperature detection signal and a second temperature detection signal, and when the refrigerator or the first air pump has a fault problem in the use process, or the temperature in the heat exchange cabin and the temperature of hydrogen at the air outlet are higher than or lower than a set temperature range value, the alarm device gives an alarm; the controller can make corresponding judgment along with the first flow rate detection signal by receiving the first flow rate detection signal, and controls the alarm device to give an alarm; the controller judges the hydrogen flow rate at the air inlet by receiving the second flow rate detection signal and adjusts the operation of the temperature control circulation component; the third temperature sensor detects the temperature of the hydrogen at the air inlet and outputs a corresponding third temperature detection signal, and the controller outputs a control signal after receiving the third temperature detection signal so as to control the operation of the temperature control circulation assembly;
3. when the hydrogen is precooled, the temperature of the hydrogen at the air outlet is obtained, and the difference value between the temperature of the hydrogen and a target temperature value is calculated, so that the controller controls the operation of the temperature control circulation assembly. Dividing the target temperature into an interval, acquiring temperature values of hydrogen at a plurality of exhaust ports to form a certain fluctuation interval, and if the detected fluctuation interval falls into the range of the target temperature interval, keeping the average running power of the temperature control circulation component in the current time period;
4. establishing any one or more combinations of an air inlet hydrogen flow rate value V1, an initial temperature value T1, a detection temperature value T2 and a cabin temperature value T3 in a heat exchange cabin, and calculating a plurality of refrigeration powers P1, gas pumping powers P2 and combinations thereof according to the incidence relation between the refrigeration powers P1 and the gas pumping powers P2 in the temperature control circulation component; and screening and retaining the target refrigerating power P1, the gas pumping power P2 and the combination thereof, and controlling the output power of the refrigerator and the first air pump in the temperature control circulation assembly according to the screening result.
Drawings
Fig. 1 is a schematic diagram illustrating an overall configuration of a first embodiment of a hydrogen pre-cooling system for a hydrogen fuel cell testing apparatus according to the present application;
fig. 2 is a schematic structural diagram of a first embodiment of a hydrogen pre-cooling system for a hydrogen fuel cell testing device according to the present application;
fig. 3 is a flow chart illustrating control of a controller to control a refrigerator and a first air pump via temperature sensing in an embodiment of a hydrogen pre-cooling system for a hydrogen fuel cell testing apparatus according to the present application;
fig. 4 is a control flow chart of a controller controlling an alarm device through temperature detection according to an embodiment of a hydrogen pre-cooling system for a hydrogen fuel cell testing device according to the present application;
fig. 5 is a control flow chart of a controller controlling an alarm device through flow rate detection and temperature detection in an embodiment of a hydrogen pre-cooling system for a hydrogen fuel cell testing device according to the present application;
fig. 6 is a schematic diagram of an overall structure of a second embodiment of a hydrogen pre-cooling system for a hydrogen fuel cell testing device according to the present application;
fig. 7 is a control flowchart of a controller controlling a temperature control cycle assembly through temperature detection according to a second embodiment of a hydrogen pre-cooling system for a hydrogen fuel cell testing device according to the present application;
FIG. 8 is a block diagram of a process for controlling a temperature-controlled circulation assembly by temperature difference in a hydrogen pre-cooling method for a hydrogen fuel cell testing apparatus according to the present application;
FIG. 9 is a block diagram of a flow chart for controlling a temperature control cycle assembly through a temperature fluctuation interval in a hydrogen pre-cooling method for a hydrogen fuel cell testing device according to the present application;
fig. 10 is a block diagram of a flow chart of a temperature control cycle module controlled by generating a temperature curve setting prediction value in a hydrogen precooling method for a hydrogen fuel cell testing apparatus according to the present application;
fig. 11 is a block diagram of a flow chart of a method for pre-cooling hydrogen gas for a hydrogen fuel cell testing device according to the present application, in which a temperature control cycle module is controlled by detecting a plurality of parameter values.
Description of reference numerals: 1. a controller; 2. a heat exchange assembly; 21. a heat exchange chamber; 22. a heat exchange pipe; 23. an air inlet; 24. an exhaust port; 3. a temperature control circulation component; 31. a gas circulation pipe; 32. a refrigerator; 33. a heater; 34. a first air pump; 35. a second air pump; 4. a temperature control detection component; 41. a first temperature sensor; 42. a second temperature sensor; 5. a fin; 6. a baffle; 7. a heat-insulating layer; 8. an alarm device; 9. a first flow rate detection assembly; 10. a second flow rate detection assembly; 11. a third temperature sensor.
Detailed Description
The present invention will be described in further detail with reference to fig. 1 to 11, but the embodiments of the present invention are not limited thereto.
The embodiment of the application discloses a hydrogen precooling system for a hydrogen fuel cell testing device.
Example 1:
referring to fig. 1 and 2, a hydrogen precooling system for a hydrogen fuel cell testing apparatus includes: a temperature control circulation component 3, a temperature detection component, a heat exchange component 2 and a controller 1 for controlling the operation of the whole hydrogen precooling system. The controller 1 receives the detection signal output by the temperature detection assembly, outputs a control signal to control the action of the temperature control circulation assembly 3 based on a set processing algorithm, and outputs the hydrogen to be precooled after heat exchange is carried out by the heat exchange assembly 2.
The controller 1 in this embodiment may be implemented by a control module with a single chip microcomputer or a PLC as a core.
The heat exchange assembly 2 is used for exchanging heat for hydrogen gas requiring precooling treatment, and as shown in fig. 1 and fig. 2, comprises a heat exchange chamber 21 and a heat exchange tube 22 penetrating through the heat exchange chamber 21, wherein the heat exchange tube 22 is provided with an air inlet 23 and an air outlet 24 on a side wall of the heat exchange chamber 21. The gas inlet 23 and the gas outlet 24 are both provided with structures which are convenient to be connected with external pipelines, such as threaded joints and the like, and can be used for connecting pipelines for conveying gas, hydrogen gas which needs to be pre-cooled is introduced into the heat exchange tube 22 from the gas inlet 23 of the heat exchange chamber 21, and finally the hydrogen gas after pre-cooled is discharged from the gas outlet 24.
In order to provide heat exchange cold, a temperature control circulation component 3 for controlling the temperature of cold air in the heat exchange chamber 21 is arranged. The temperature control circulation component 3 comprises a refrigerator 32, a first air pump 34 and at least one gas circulation pipe 31, wherein the refrigerator 32 and the first air pump 34 are both communicated and arranged on the gas circulation pipe 31 and are in control connection with the controller 1, two ends of the gas circulation pipe 31 are communicated and arranged on the heat exchange chamber 21 and form a refrigeration circulation loop together with the heat exchange chamber 21, and the refrigerator 32 in the embodiment can be a gas compression type refrigerator. When the device works, the first air pump 34 pumps cold air in the heat exchange cabin 21 into the air circulation pipe 31, and the cold air is refrigerated by the refrigerator 32, so that the overall temperature in the heat exchange cabin 21 is controlled, and the hydrogen in the heat exchange pipe 22 is subjected to heat exchange, so that the temperature of the hydrogen is reduced to be consistent with the temperature of the air in the heat exchange cabin 21.
In this embodiment, one gas circulation pipe 31 may be used, and the refrigerator 32 and the first air pump 34 are controlled by being located on one gas circulation pipe 31, so as to simplify the overall structure of the hydrogen pre-cooling system.
Optimally, in practical use, two or more gas circulation pipelines 31 can be arranged, the refrigerators 32 are respectively arranged without mutual influence, and when the refrigerating power of one refrigerator 32 does not meet the set requirement, a plurality of refrigerators 32 can be started to work simultaneously. When one of the refrigerators 32 fails, the entire hydrogen pre-cooling system can still operate properly.
The advantage that above-mentioned structure set up not only lies in that whole precooling system occupation space is little, moreover because hydrogen and refrigerator 32 phase separation in the heat transfer process, can save the electric explosion-proof structure in the equipment, also lets whole precooling system motion safer.
As shown in FIG. 1, the gas input end of the refrigeration cycle pipe is located at the position of the heat exchange chamber 21 close to the gas outlet 24, and the gas output end of the refrigeration cycle pipe is located at the position of the heat exchange chamber 21 close to the gas inlet 23, so that the end of the heat exchange pipe 22 close to the gas inlet 23 can keep the same with the cold gas output end of the refrigeration cycle pipe, and the heat exchange effect is better. For the sake of simplicity, the air inlet 23 and the air outlet 24 are disposed on the same side of the heat exchange chamber 21, and in practical applications, the air inlet 23 and the air outlet 24 may be disposed on two opposite sides of the heat exchange chamber 21. In detail, as shown in fig. 1 and 2, the heat exchange tubes 22 are configured as a heat exchange coil, and the heat exchange coil is disposed in a coil ring in the heat exchange chamber 21. When the hydrogen precooling system is used, the length of the whole heat exchange tube 22 in the heat exchange cabin 21 is prolonged by the heat exchange coil, the residence time of hydrogen in the heat exchange tube 22 in the heat exchange cabin 21 is prolonged, the hydrogen heat exchange is more sufficient, and the heat exchange effect is improved.
Optimally, in order to increase the heat exchange area of the surface side wall of the heat exchange tube 22 and improve the heat exchange speed, the heat exchange coil is integrally provided with fins 5.
Further optimize, some gas guide plates 6 can be additionally arranged in the heat exchange cabin 21 in the embodiment in a welding mode and the like, so that cold air can fully flow in the heat exchange cabin 21, and the heat exchange effect is improved.
In order to enable temperature detection of the hydrogen pre-cooling system, a temperature detection assembly for detecting temperature is provided, which is configured as a first temperature sensor 41 in signal connection with the controller 1 and provided in the heat exchange compartment 21, and a second temperature sensor 42 provided at the exhaust port 24. The first temperature sensor 41 and the second temperature sensor 42 in this embodiment may be explosion-proof temperature sensors KZW/K-240, which can detect the temperature of flammable and combustible gas. For the sake of simplicity, the second temperature sensor 42 may be disposed on the pipe for outputting hydrogen gas connected to the exhaust port 24 in practical use.
As shown in fig. 3, the first temperature sensor 41 collects the temperature in the heat exchange chamber 21 and outputs a first temperature detection signal, and the second temperature sensor 42 collects the temperature of the heat exchange tube 22 at the exhaust port 24, and can detect the temperature of the hydrogen gas at the exhaust port 24 after the pre-cooling treatment and output a second temperature detection signal. The controller 1 receives the first temperature detection signal and the second temperature detection signal, and outputs a control signal to control the operations of the refrigerator 32 and the first air pump 34 based on a set processing algorithm. If the temperature in the heat exchange chamber 21 is higher, or the temperature of the hydrogen gas output from the exhaust port 24 after the pre-cooling treatment is higher than the target temperature, the controller 1 outputs a control signal to increase the power of the refrigerator 32 and the first air pump 34, so as to reduce the temperature in the heat exchange chamber 21; if the temperature in the heat exchange chamber 21 is lower, or the temperature of the hydrogen gas output from the exhaust port 24 after the pre-cooling treatment is lower than the target temperature, the controller 1 outputs a control signal to reduce the power of the refrigerator 32 and the first air pump 34, so that the temperature in the heat exchange chamber 21 rises to some extent, and the accuracy of temperature control is further improved. Optimally, as shown in fig. 1, the number of the first temperature sensors 41 located in the heat exchange chamber 21 can be at least two, and the first temperature sensors are respectively located at the air inlet 23 and the air outlet 24, and can be respectively used for detecting the temperature at the two ends of the heat exchange chamber 21 along the hydrogen conveying direction, so that the temperature measurement is more accurate through multi-directional detection.
As shown in fig. 4, the controller 1 is connected to an alarm device 8, the controller 1 can receive control feedback signals of the refrigerator 32 and the first air pump 34, and when the refrigerator 32 or the first air pump 34 fails, the controller 1 sends the control feedback signals to the controller 1, and the controller 1 receives the control feedback signals, processes the control feedback signals and sends an alarm signal, so that the alarm device 8 gives an alarm. The controller 1 can also receive a first temperature detection signal and a second temperature detection signal, when the temperature in the heat exchange chamber 21 or the temperature of the hydrogen output from the exhaust port 24 is higher or lower than a preset temperature range value, the controller 1 sends out an alarm signal after receiving the first temperature detection signal and the second temperature detection signal, and the alarm device 8 immediately generates an alarm. In the embodiment of the present application, the alarm device 8 is configured as an xyz-S02 audible and visual alarm.
As shown in fig. 2 and 5, a first flow rate detection module 9 for detecting the flow rate of the gas in the gas circulation pipe 31 is disposed in the gas circulation pipe 31, detects the flow rate of the gas in the gas circulation pipe 31, and outputs a first flow rate detection signal. The first flow rate detecting assembly 9 in this embodiment may be a JCY-6 type intelligent gas flow rate measuring instrument. Wherein the first flow rate detection assembly 9 is in signal connection with the controller 1; and the controller 1 receives and responds to the first flow rate detection signal to control the action of the temperature control cycle assembly 3 or the alarm device 8 according to the flow rate of the cold air. If the temperature control circulating assembly 3 has a fault, for example, the cold air flow rate gradually decreases, or even the cold air flow rate is zero, the controller 1 receives the first flow rate detection signal and then causes the alarm device 8 to generate an alarm prompt.
The second flow rate detection assembly 10 is disposed at the air inlet 23 and is in signal connection with the controller 1, and the second flow rate detection assembly 10 detects the hydrogen flow rate at the air inlet 23 and outputs a second flow rate detection signal. The second flow rate detecting assembly 10 in this embodiment may also be a JCY-6 type intelligent gas flow rate measuring instrument, and in practical use, the second flow rate detecting assembly 10 may be disposed on a pipeline connected to the gas inlet 23 and used for inputting hydrogen gas. The controller 1 receives the second flow rate detection signal, and outputs a control signal to control the operations of the refrigerator 32 and the first air pump 34 based on a set processing algorithm. If the flow rate at the air inlet 23 changes, the controller 1 outputs a control signal after receiving the second flow rate detection signal, so that the refrigeration power and/or the gas pumping power of the temperature control circulation component 3 can be controlled in time, and the accuracy of the hydrogen pre-cooling system on temperature control is improved.
Further, a third temperature sensor 11 is disposed at the gas inlet 23 and is in signal connection with the controller 1, and for the sake of simplicity, the third temperature sensor 11 may be disposed on a pipeline connected to the gas inlet 23 and used for inputting hydrogen in practical applications. The third temperature sensor 11 is used for acquiring the temperature of the heat exchange tube 22 at the air inlet 23 and outputting a third temperature detection signal, and the explosion-proof temperature sensor KZW/K-240 may also be used as the third temperature sensor 11 in this embodiment. The controller 1 receives the third temperature detection signal, and if the temperature of the hydrogen input at the air inlet 23 changes, based on a set processing algorithm, the controller 1 can correspondingly adjust the temperature control circulation component 3, control the refrigeration power and/or the gas pumping power of the temperature control circulation component 3, and improve the accuracy of the hydrogen precooling system in controlling the temperature.
The implementation principle of the hydrogen precooling system for the hydrogen fuel cell testing device in the embodiment of the application is as follows: when the hydrogen precooling system is used, the controller 1 receives the first temperature detection signal output by the first temperature sensor 41 and the second temperature detection signal output by the second temperature sensor 42, and then performs determination based on a set processing algorithm, and the controller 1 outputs a control signal to adjust the power of the refrigerator 32 and the first air pump 34. The controller 1 receives control feedback signals of the refrigerator 32 and the first air pump 34 and first temperature detection signals and second temperature detection signals, and can enable the alarm device 8 to give an alarm when the refrigerator 32 or the first air pump 34 has a fault; the alarm device 8 can also generate an alarm if the temperature in the heat exchange chamber 21 and the hydrogen gas temperature at the exhaust port 24 are higher or lower than the set temperature range value. The controller 1 receives the second flow rate detection signal to judge the hydrogen flow rate at the gas inlet 23 and adjust the operation of the temperature control circulation component 3; after receiving the third temperature detection signal output by the third temperature sensor 11, the controller 1 can correspondingly output a control signal to further control the operation of the temperature control circulating assembly 3.
Example 2:
referring to fig. 6 and 7, the present embodiment is different from embodiment 1 in that the temperature-controlled circulation assembly 3 includes a refrigerator 32, a heater 33, a first air pump 34, a second air pump 35, and at least one gas circulation pipe 31, wherein the refrigerator 32, the heater 33, the first air pump 34, and the second air pump 35 are respectively and communicatively disposed on the plurality of gas circulation pipes 31 and are in control connection with the controller 1, and two ends of the gas circulation pipe 31 are communicatively disposed on the heat exchange chamber 21 to respectively form a heating circulation loop and a cooling circulation loop. The first air pump 34 and the second air pump 35 pump the cold air in the heat exchange chamber 21 into the gas circulation pipe 31, and the cold air is cooled and/or heated by the refrigerator 32 and/or the heater 33, thereby controlling the overall temperature in the heat exchange chamber 21 and performing heat exchange on the hydrogen gas in the gas circulation pipe 31.
During use, the controller 1 receives the first temperature detection signal and the second temperature detection signal, and outputs control signals to control the operations of the refrigerator 32, the heater 33, and the first air pump 34 and the second air pump 35 based on a set processing algorithm. If the temperature in the heat exchange chamber 21 is higher, or the temperature of the hydrogen gas output from the exhaust port 24 after the pre-cooling treatment is higher than the target temperature, the controller 1 outputs a control signal to increase the power of the refrigerator 32 and the first air pump 34, so as to reduce the temperature in the heat exchange chamber 21; if the temperature in the heat exchange chamber 21 is lower, or the temperature of the hydrogen gas output from the exhaust port 24 after the pre-cooling treatment is lower than the target temperature, the controller 1 outputs a control signal to reduce the power of the refrigerator 32 and the first air pump 34, and controls the operation of the heater 33 and the second air pump 35 to heat the cold gas in the heat exchange chamber 21, so that the temperature in the heat exchange chamber 21 is increased to some extent, thereby improving the accuracy of temperature control. Optimally, two or more gas circulation pipes 31 can be selected in practical use, and the refrigerator 32 and the heater 33 can be respectively positioned on the two or more gas circulation pipes 31 for control, and do not influence each other. When the power of one refrigerator 32 and heater 33 does not meet the set requirement, a plurality of refrigerators 32 and heaters 33 can be started to work simultaneously. When one of the refrigerator 32 or the heater 33 fails, the entire hydrogen pre-cooling system can still operate normally.
The implementation principle of a hydrogen precooling system for a hydrogen fuel cell testing device in the second embodiment of the application is as follows: controller 1 is through receiving first temperature detect signal and second temperature detect signal to know and control the temperature state in the heat transfer cabin 21, temperature control circulation subassembly 3 has added the temperature in the comprehensive regulation and control heat transfer cabin 21 that heater 33 can be better, is favorable to the recovery after the temperature change, is favorable to keeping the stability of temperature regulation in the heat transfer cabin 21.
The embodiment of the application also discloses a hydrogen precooling method for the hydrogen fuel cell testing device. As shown in fig. 8, a hydrogen precooling method for a hydrogen fuel cell testing device includes:
a100, acquiring the temperature of hydrogen at the exhaust port 24 to generate a detection temperature value;
a200, subtracting the detected temperature value and a set target temperature value to calculate a temperature difference value;
a300, adjusting the refrigeration power and/or the gas pumping power of the temperature control circulation component 3 based on the calculated difference;
a301, if the difference is regular, the hydrogen temperature is higher than the target temperature, the controller 1 outputs a control signal to improve the refrigeration power and/or the gas pumping power of the temperature control circulation component 3;
a302, if the difference is negative, it indicates that the hydrogen temperature is lower than the target temperature, and the controller 1 outputs a control signal to reduce the refrigeration power and/or the gas pumping power of the temperature control cycle assembly 3.
The difference value between the hydrogen temperature after the pre-cooling treatment and the target temperature is used for adjusting the temperature, so that the accuracy of temperature control in the hydrogen pre-cooling treatment process can be improved on the premise of ensuring the hydrogen flow.
Optimally, the method can be further configured to: as shown in figure 9 of the drawings,
b100, detecting a plurality of detected temperature values in a set time period and generating at least one parameter curve reflecting the trend of the detected temperature values;
b200, calculating and generating a predicted value of the detected temperature value at the future set moment based on the parameter curve;
b300, adjusting the refrigerating power and/or the gas pumping power of the temperature control circulation component 3 according to the estimated value;
when hydrogen is precooled, the target temperature is divided into an interval, the temperature values of the hydrogen at the exhaust ports 24 are detected within a set time, the estimated time exceeding the target temperature interval can be further predicted according to the trend of a parameter curve formed by the temperature values, and the refrigerating power and/or the gas pumping power of the temperature control circulation assembly 3 are/is adjusted in advance within the estimated time, so that the temperature of the hydrogen can be always kept within the target temperature interval, and the precooled temperature of the hydrogen can be kept more stably; the accuracy of temperature control in the hydrogen precooling process is improved, the hydrogen flow can be ensured, and the change of the flow can be correspondingly adjusted according to prejudgment.
Optimally, the method can be further configured to: as shown in figure 10 of the drawings,
c100, defining the target temperature within an interval range based on the set target temperature value;
c200, detecting a fluctuation interval of the detected temperature value within a set period of time;
c300, collecting the average refrigerating power and/or gas pumping power of the temperature control circulation component 3 in a set time period;
c301, if the fluctuation interval is within the target temperature interval, keeping the temperature control circulation component 3 running at the average refrigeration power;
and C302, if the fluctuation interval is not within the target temperature interval, the controller 1 outputs a control signal to control the refrigerating power and/or the gas pumping power of the temperature control circulation component 3.
When hydrogen is precooled, after average refrigerating power and/or gas pumping power of the temperature control circulation assembly 3 in a certain period of time are/is obtained by obtaining a plurality of hydrogen temperature values which are subjected to preheating treatment in a certain period of time, if a fluctuation interval formed by a plurality of detected temperature values falls into a target temperature interval range, the temperature control circulation assembly 3 can keep the average operating power in the current period of time, and the stability of hydrogen precooling treatment is improved.
Optimally, the method can be further configured to: as shown in figure 11 of the drawings,
d100 detecting the hydrogen flow rate at the air inlet 23 by the second flow rate detection assembly 10, the initial temperature at the air inlet 23 by the third temperature sensor 11, the detected temperature at the air outlet 24 by the second temperature sensor 42, and the cabin temperature in the heat exchange cabin 21 by the first temperature sensor 41, respectively, and generating a hydrogen flow rate value V1 at the air inlet 23, an initial temperature value T1 at the air inlet 23, a detected temperature value T2 at the air outlet 24, and a cabin temperature value T3 in the heat exchange cabin 21;
d200, based on the above detection values, storing each obtained detection value in a table form, and establishing a storage association relationship between any one or a combination of more of the hydrogen flow rate value V1, the initial temperature value T1, the detected temperature value T2, and the cabin temperature value T3, and the refrigeration power P1 and the gas pumping power P2 in the temperature control cycle component 3;
d300, calculating a plurality of refrigeration powers P1, gas pumping powers P2 and combinations thereof based on the incidence relation and the hydrogen flow rate value V1, the initial temperature value T1, the detection temperature value T2 and the cabin temperature value T3 which are acquired in real time;
d400, according to the obtained multiple refrigeration powers P1, gas pumping powers P2 and combinations thereof, and based on a set algorithm, screening to obtain a target refrigeration power P1, a gas pumping power P2 and combinations thereof, wherein the obtained multiple refrigeration powers P1, the gas pumping powers P2 and combinations thereof are distributed discretely, and the values with concentrated distribution can be reserved during screening. Since there are many undesirable values in the resulting plurality of refrigeration powers P1, gas pumping powers P2, and combinations thereof, it is necessary to retain the target value by screening.
And D500, controlling the output power of the refrigerator 32 and the first air pump 34 in the temperature-controlled circulation assembly 3 according to the target refrigeration power P1, the gas pumping power P2 and the combination thereof obtained by the screening result.
So set up from the angle of multiple aspects and realize control processing of control by temperature change circulation subassembly 3 to hydrogen heat exchange, even hydrogen flow, the hydrogen temperature that does not carry out the precooling and handle is different, the homoenergetic is according to the change of different variable parameters, carries out corresponding adjustment to control by temperature change circulation subassembly 3. In the pre-cooling treatment process, any one parameter value of the hydrogen flow rate value V1, the initial temperature value T1, the detected temperature value T2 and the cabin temperature value T3 is changed, so that the whole pre-cooling treatment process is not influenced, and the hydrogen flow rate value can still stably run. The hydrogen flow can be ensured, and the temperature can be accurately adjusted in the hydrogen precooling treatment process.
The implementation principle of the hydrogen precooling method for the hydrogen fuel cell testing device in the embodiment of the application is as follows: when the hydrogen is precooled, the temperature of the hydrogen at the exhaust port 24 is obtained, the difference value between the temperature and the target temperature value is calculated, the judgment is made according to the difference value, and the controller 1 controls the operation of the temperature control circulation component 3. Acquiring the temperature values of the hydrogen at the exhaust ports 24 to form a certain fluctuation interval, judging whether the fluctuation interval falls into the range of the target temperature interval, and if the fluctuation interval falls into the range, keeping the average running power of the temperature control circulating assembly 3 in the current time period. Establishing any one or more combinations of a hydrogen flow rate value V1 of the air inlet 23, an initial temperature value T1, a detected temperature value T2 and a cabin temperature value T3 in the heat exchange cabin 21, and calculating a plurality of refrigeration powers P1, gas pumping powers P2 and combinations thereof according to an incidence relation between the refrigeration powers P1 and the gas pumping powers P2 in the temperature control circulation component 3; and the target refrigeration power P1, the gas pumping power P2 and the combination thereof are screened and reserved, and the output powers of the refrigerator 32 and the first air pump 34 in the temperature control circulation assembly 3 are controlled according to the screening result, so that the accurate adjustment of the hydrogen precooling temperature is realized, and the whole using effect is good.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. A hydrogen precooling system for a hydrogen fuel cell testing device is characterized by comprising:
a controller (1);
the heat exchange assembly (2) comprises a heat exchange chamber (21) and a heat exchange tube (22) penetrating the heat exchange chamber (21), wherein an air inlet (23) and an air outlet (24) are formed in the side wall of the heat exchange chamber (21) of the heat exchange tube (22);
the temperature control circulation assembly (3) comprises at least one gas circulation pipe (31), a refrigerator (32), a heater (33), a first air pump (34) and a second air pump (35) which are communicated with the gas circulation pipe (31), the refrigerator (32), the heater (33), the first air pump (34) and the second air pump (35) are all in control connection with the controller (1), and two ends of the gas circulation pipe (31) are respectively communicated with the heat exchange cabin (21) to form a heating circulation loop and a refrigerating circulation loop;
the temperature detection assembly is configured to be in signal connection with the controller (1) and arranged in a first temperature sensor (41) in the heat exchange cabin (21) and a second temperature sensor (42) arranged at the exhaust port (24), the first temperature sensor (41) collects the temperature in the heat exchange cabin (21) and outputs a first temperature detection signal, and the second temperature sensor (42) collects the temperature of the heat exchange pipe (22) at the exhaust port (24) and outputs a second temperature detection signal;
the controller (1) receives the first temperature detection signal and the second temperature detection signal, and outputs control signals to control the actions of the refrigerator (32), the heater (33), the first air pump (34) and the second air pump (35) based on a set processing algorithm.
2. The hydrogen precooling system for the hydrogen fuel cell testing device as recited in claim 1, wherein the heat exchange tube (22) is configured as a heat exchange coil, and fins (5) are arranged on the heat exchange coil.
3. The hydrogen precooling system for the hydrogen fuel cell testing device according to claim 1, wherein an alarm device (8) is connected to the controller (1), and the controller (1) receives control feedback signals of the refrigerator (32) and the first air pump (34) and first and second temperature detection signals, and outputs an alarm signal to the alarm device (8) when the signals exceed a set range.
4. The hydrogen precooling system for the hydrogen fuel cell testing device according to claim 3, wherein a first flow rate detection assembly (9) is arranged on the gas circulation pipe (31) for detecting the gas flow rate in the gas circulation pipe (31) and outputting a first flow rate detection signal;
the first flow rate detection assembly (9) is in signal connection with the controller (1);
the controller (1) receives and responds to the first flow speed detection signal and controls the action of the temperature control circulation component (3) or the alarm device (8).
5. The hydrogen precooling system for the hydrogen fuel cell testing device according to claim 1, wherein a second flow rate detection component (10) in signal connection with the controller (1) is arranged at the gas inlet (23), and the second flow rate detection component (10) detects the hydrogen flow rate at the gas inlet (23) and outputs a second flow rate detection signal;
the controller (1) receives the second flow rate detection signal, and outputs a control signal to control the actions of the refrigerator (32) and the first air pump (34) based on a set processing algorithm.
6. The hydrogen precooling system for the hydrogen fuel cell testing device according to claim 1, wherein a third temperature sensor (11) in signal connection with the controller (1) is arranged at the gas inlet (23), and the third temperature sensor (11) collects the temperature of the heat exchange tube (22) at the gas inlet (23) and outputs a third temperature detection signal;
the controller (1) receives the third temperature detection signal, and outputs a control signal to control the actions of the refrigerator (32) and the first air pump (34) based on a set processing algorithm.
7. A hydrogen precooling method for a hydrogen fuel cell testing device, which is based on the hydrogen precooling system for the hydrogen fuel cell testing device as claimed in any one of claims 1 to 6, and comprises the following steps:
acquiring the temperature of the hydrogen at the exhaust port (24) to generate a detection temperature value;
adjusting the refrigerating power and/or the gas pumping power of the temperature control circulation component (3) based on the difference value between the detected temperature value and the set target temperature value;
if the difference value is regular, the controller (1) outputs a control signal to improve the refrigerating power and/or the gas pumping power of the temperature control circulation component (3);
and if the difference is negative, the controller (1) outputs a control signal to reduce the refrigerating power and/or the gas pumping power of the temperature control circulation component (3).
8. A hydrogen precooling method for a hydrogen fuel cell test apparatus as claimed in claim 7, wherein the method further comprises:
defining a target temperature interval based on the set target temperature value;
detecting a fluctuation interval of a detected temperature value in a set time period, and acquiring the average refrigerating power and/or gas pumping power of the temperature control circulation component (3) in the set time period if the fluctuation interval is located in the target temperature interval;
and keeping the temperature control circulation assembly (3) running at the average refrigeration power.
9. A hydrogen precooling method for a hydrogen fuel cell test apparatus as claimed in claim 7, wherein the method further comprises:
defining a target temperature interval based on the set target temperature value;
detecting a plurality of detected temperature values in a set time period and generating at least one parameter curve reflecting the trend of the detected temperature values;
calculating and generating a predicted value of the detected temperature value at the set moment in the future based on the parameter curve;
and adjusting the refrigerating power and/or the gas pumping power of the temperature control circulation component (3) according to the estimated value.
10. A hydrogen precooling method for a hydrogen fuel cell test apparatus as claimed in claim 7, characterized by comprising the steps of:
detecting and generating a hydrogen flow rate value V1 at the air inlet (23), an initial temperature value T1 at the air inlet (23), a detected temperature value T2 at the air outlet (24) and a cabin temperature value T3 in the heat exchange cabin (21);
establishing a correlation between any one or more of the hydrogen flow rate value V1, the initial temperature value T1, the detected temperature value T2 and the cabin temperature value T3 and the refrigeration power P1 and the gas pumping power P2 in the temperature control circulation component (3);
based on the correlation and the hydrogen flow rate value V1, the initial temperature value T1, the detection temperature value T2 and the cabin temperature value T3 which are acquired in real time, a plurality of refrigeration powers P1, gas pumping powers P2 and combinations thereof are obtained through calculation;
according to the obtained multiple refrigeration powers P1, gas pumping powers P2 and combinations thereof, based on a set algorithm, a target refrigeration power P1, a gas pumping power P2 and combinations thereof are obtained through screening;
the output powers of the refrigerator (32) and the first air pump (34) in the temperature controlled circulation assembly (3) are controlled based on the above-mentioned target refrigeration power P1, gas pumping power P2, and a combination thereof.
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