CN114411165B - PEM water electrolysis hydrogen production water body temperature control method, system, equipment and medium - Google Patents

PEM water electrolysis hydrogen production water body temperature control method, system, equipment and medium Download PDF

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CN114411165B
CN114411165B CN202111683377.8A CN202111683377A CN114411165B CN 114411165 B CN114411165 B CN 114411165B CN 202111683377 A CN202111683377 A CN 202111683377A CN 114411165 B CN114411165 B CN 114411165B
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temperature
cooling
pure water
duty ratio
detection temperature
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CN114411165A (en
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李鹏
段正鹏
金程
张清杰
刘振荣
孙成
韩昊
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Foshan Xianhu Laboratory
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/02—Process control or regulation
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/02—Process control or regulation
    • C25B15/023—Measuring, analysing or testing during electrolytic production
    • C25B15/025—Measuring, analysing or testing during electrolytic production of electrolyte parameters
    • C25B15/027—Temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis

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  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

The invention relates to the technical field of temperature control, and discloses a method, a system, equipment and a medium for controlling the temperature of a PEM water electrolysis hydrogen production water body. The method comprises the following steps: detecting and obtaining a first detection temperature, a second detection temperature and a third detection temperature; judging whether the first detection temperature is higher than the target pure water temperature or not; performing PI closed loop operation according to the difference value between the first detection temperature and the target pure water temperature to obtain a heating duty ratio or performing PI closed loop operation according to the difference value between the second detection temperature and the target cooling water temperature determined by the second detection temperature and the third detection temperature to obtain a cooling duty ratio; and performing pulse width modulation on the heating device and the cooling device according to the cooling duty ratio or the heating duty ratio. The invention adopts the PI closed-loop algorithm to calculate the duty ratio to realize the dynamic adjustment of the pure water temperature, and carries out pulse width modulation according to the calculated duty ratio, thereby dynamically carrying out temperature rise and temperature reduction treatment on the electrolysis water, and having high temperature control precision.

Description

PEM water electrolysis hydrogen production water body temperature control method, system, equipment and medium
Technical Field
The invention relates to the technical field of temperature control, in particular to a method, a system, equipment and a medium for controlling the temperature of a PEM water electrolysis hydrogen production water body.
Background
In the field of hydrogen production by water electrolysis of PEM (proton exchange membrane), the temperature of water entering an electrolytic cell has important influence on the operating efficiency, the operating performance attenuation and the like of the electrolytic cell. In order to maintain the temperature of the electrolytic cell in the optimum temperature range, the temperature of the water entering the electrolytic cell needs to be controlled. The current temperature control scheme is: the cooling water carries out the heat exchange with the water that flows out the electrolysis trough in order to reduce the temperature, and the cooling water carries out the heat exchange through a heat exchanger and the water that flows out the electrolysis trough, and cooling device of rethread is cooled down the cooling water, when needing the heating water body, heats the water body through the heater to it is long when the temperature data control heating according to temperature sensor collection.
Control the water temperature according to above-mentioned temperature control scheme, only can reach wide range control by temperature change effect, system temperature control efficiency and control accuracy are low, and some count schemes only carry out cooling control even, can't satisfy the demand of studying the influence of different temperatures to electrolysis efficiency in the test system.
Disclosure of Invention
The invention aims to provide a method, a system, equipment and a medium for controlling the temperature of a PEM water electrolysis hydrogen production water body, so as to solve one or more technical problems in the prior art and provide at least one beneficial choice or creation condition.
In a first aspect, a method for controlling the temperature of a water body for hydrogen production by PEM water electrolysis is provided, which comprises the following steps:
detecting pure water entering an inlet of the PEM electrolytic stack to obtain a first detection temperature, detecting cooling water to obtain a second detection temperature, and detecting pure water in the pure water supply device to obtain a third detection temperature; the PEM electrolytic stack is used for electrolyzing input pure water, the cooling water is used for providing cold energy for the pure water flowing into the PEM electrolytic stack through heat exchange, and the pure water supply device is used for storing the pure water;
judging whether the first detection temperature is higher than a set target pure water temperature or not;
when the first detection temperature is lower than the target pure water temperature, performing PI closed-loop operation according to the difference value of the first detection temperature and the target pure water temperature to obtain a heating duty ratio;
when the first detection temperature is higher than the target pure water temperature, performing PI closed-loop operation according to the second detection temperature and a difference value of the target cooling water temperature determined by the second detection temperature and the third detection temperature to obtain a cooling duty ratio;
and performing pulse width modulation on the heating device and the cooling device according to the cooling duty ratio or the heating duty ratio to enable the first detection temperature to approach the target pure water temperature until the value of the first detection temperature is equal to that of the target pure water temperature.
Further, the performing PI closed-loop operation according to the difference between the first detected temperature and the target pure water temperature to obtain the heating duty ratio includes:
calculating the difference value between the first detection temperature and the target pure water temperature to obtain a first deviation value;
and carrying out proportional amplification on the first deviation value and integrating the deviations of all past time through PI closed-loop operation, and further determining the heating duty ratio of pulse width modulation.
Further, the performing PI closed-loop operation according to the second detected temperature and the difference between the second detected temperature and the target cooling water temperature determined by the third detected temperature to obtain the cooling duty includes:
calculating the difference value of the second detection temperature and the third detection temperature to obtain the temperature of the target cooling water;
calculating a difference value between the second detection temperature and the target cooling water temperature to obtain a second deviation value;
and proportionally amplifying the second deviation value and integrating the deviations of all past time through PI closed-loop operation so as to determine the cooling duty ratio of the pulse width modulation.
Further, the pulse width modulation of the heating device and the cooling device according to the cooling duty cycle or the heating duty cycle includes:
when the first detection temperature is lower than the target pure water temperature, increasing the heating power of the heating device and reducing the cooling power of the cooling device according to the calculated heating duty ratio;
and when the first detection temperature is higher than the target pure water temperature, reducing the heating power of the heating device and increasing the cooling power of the cooling device according to the calculated cooling duty ratio.
Further, increasing the heating power of the heating device and decreasing the cooling power of the cooling device according to the calculated heating duty cycle includes: generating a pulse width modulation signal according to the heating duty ratio, triggering a heating device to work at a high level stage of the pulse width modulation signal, and triggering a cooling device to work at a low level stage of the pulse width modulation signal;
the reducing the heating power of the heating device and increasing the cooling power of the cooling device according to the calculated cooling duty cycle includes: and generating a pulse width modulation signal according to the cooling duty ratio, triggering the cooling device to work at the high level stage of the pulse width modulation signal, and triggering the cooling device to work at the low level stage of the pulse width modulation signal.
In a second aspect, a PEM water electrolysis hydrogen production water body temperature control system is provided, which comprises a cooling water supply device, a pure water supply device, a heat exchanger, a PEM electrolytic stack and a controller, wherein the controller comprises a detection module, a judgment module, a calculation module and a control module;
the cooling water supply device, the pure water supply device and the PEM electrolytic stack are respectively connected with a heat exchanger, a heating device is arranged in the pure water supply device, and the heat exchanger carries out heat exchange on the cooling water of the cooling water supply device and the pure water of the pure water supply device and outputs the heat-exchanged pure water to the PEM electrolytic stack;
the detection module is used for detecting pure water at an inlet of the PEM electrolytic stack to obtain a first detection temperature, detecting cooling water to obtain a second detection temperature, and detecting the pure water supply device to obtain a third detection temperature; the PEM electrolytic stack is used for electrolyzing input pure water, the cooling water is used for providing cold energy for the pure water flowing into the PEM electrolytic stack through heat exchange, and the pure water supply device is used for storing the pure water;
the judging module is used for judging whether the first detection temperature is greater than the set target pure water temperature;
the calculation module is used for carrying out PI closed-loop operation according to the difference value between the first detection temperature and the target pure water temperature and obtaining a heating duty ratio when the first detection temperature is lower than the target pure water temperature; when the first detection temperature is higher than the target pure water temperature, performing PI closed-loop operation according to the second detection temperature and a difference value of the target cooling water temperature determined by the second detection temperature and the third detection temperature to obtain a cooling duty ratio;
the control module is used for carrying out pulse width modulation on the heating device and the cooling device according to the cooling duty ratio or the heating duty ratio to enable the first detection temperature to approach the target pure water temperature until the value of the first detection temperature is equal to the value of the target pure water temperature.
Furthermore, the output end of the heat exchanger is connected with a cooling water supply device, the heat exchanger outputs the cooling water after heat exchange to the cooling water supply device, the PEM electrolytic stack is connected with a pure water supply device, and the PEM electrolytic stack outputs the electrolyzed pure water to the pure water supply device.
Furthermore, a temperature control valve is arranged on a connecting passage of the cooling water supply device and the heat exchanger, and the control module adjusts the opening degree of the temperature control valve according to the cooling duty ratio or the heating duty ratio.
In a third aspect, a computer device is provided, comprising:
a memory storing a computer program;
a processor which, when executing the computer program, implements the method for controlling the temperature of the water body for hydrogen production by PEM water electrolysis according to the first aspect.
In a fourth aspect, a computer storage medium is provided, on which a computer program is stored, which when executed by a processor, implements the method for controlling the temperature of a PEM water electrolysis hydrogen production water body according to the first aspect.
The invention has the beneficial effects that: the dynamic adjustment of the pure water temperature is realized by adopting a mode of calculating the duty ratio by a PI closed-loop algorithm, the pulse width modulation is carried out according to the calculated duty ratio, and then the temperature rise and the temperature reduction treatment are carried out on the electrolysis water dynamically, so that the temperature of the electrolysis water can be accurately controlled, and the temperature control precision is high.
Drawings
Fig. 1 is a flow chart illustrating a method for controlling temperature of a PEM water electrolysis hydrogen production water body according to an embodiment.
Fig. 2 is a flow diagram illustrating the method of step S300 according to one embodiment.
Fig. 3 is a flow diagram illustrating the method of step S400 according to one embodiment.
FIG. 4 is a block diagram of a PEM water electrolysis hydrogen production water body temperature control system according to one embodiment.
Fig. 5 is a block diagram illustrating a configuration of a controller according to an embodiment.
FIG. 6 is an internal block diagram of a computer device shown in accordance with one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the present invention will be further described with reference to the embodiments and the accompanying drawings.
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the disclosure, as detailed in the appended claims.
According to a first aspect of the invention, a method for controlling the temperature of a PEM water body for hydrogen production by water electrolysis is provided.
Referring to fig. 1, fig. 1 is a flow chart illustrating a method for controlling temperature of a PEM water electrolysis hydrogen production water body according to an embodiment. As shown in fig. 1, the method includes the following steps S100 to S400.
S100, detecting pure water entering an inlet of the PEM electrolytic stack to obtain a first detection temperature, detecting cooling water to obtain a second detection temperature, and detecting pure water in the pure water supply device to obtain a third detection temperature.
The process of preparing hydrogen by electrolyzing water through PEM mainly comprises the steps of dissociating pure water to generate hydrogen and oxygen, introducing the pure water into a PEM electrolytic stack for electrolysis, separating the hydrogen generated by electrolysis from the oxygen, and drying and purifying to obtain the hydrogen to be prepared. In the process of producing hydrogen by using PEM (proton exchange membrane) electrolytic water, the temperature of the water entering the PEM electrolytic tank has important influence on the operation efficiency, the operation performance attenuation and the like of the PEM electrolytic tank, and the temperature of the pure water entering the PEM electrolytic tank needs to be controlled in order to keep the temperature of the PEM electrolytic tank in an optimal temperature range.
The PEM electrolytic stack is used for electrolyzing input pure water, the cooling water is used for providing cold energy for the pure water flowing into the PEM electrolytic stack through heat exchange, and the pure water supply device is used for storing the pure water. The pure water supply device supplies pure water for electrolysis to the PEM electrolysis stack, and adjusts the temperature of the pure water entering the PEM electrolysis stack by exchanging heat with cooling water before the pure water enters the PEM electrolysis stack. In step S100, the pure water temperature at the inlet of the PEM electrolytic stack, the cooling water for heat exchange and the pure water of the pure water supply device are detected, and an adjusting basis is provided for adjusting the pure water temperature for electrolysis.
And S200, judging whether the first detection temperature is greater than the set target pure water temperature.
The first detection temperature is the temperature of pure water finally input into the PEM electrolytic stack, the target pure water temperature is the pure water temperature standard set according to the electrolysis system process, and the temperature of the pure water currently input into the PEM electrolytic stack can be intuitively determined to be too high, too low or in a proper state by comparing the first detection temperature with the target pure water temperature.
And S300, when the first detection temperature is lower than the target pure water temperature, performing PI closed-loop operation according to the difference value of the first detection temperature and the target pure water temperature to obtain a heating duty ratio.
And S400, when the first detection temperature is higher than the target pure water temperature, performing PI closed-loop operation according to the second detection temperature and the difference value of the target cooling water temperature determined by the second detection temperature and the third detection temperature to obtain the cooling duty ratio.
And S500, performing pulse width modulation on the heating device and the cooling device according to the cooling duty ratio or the heating duty ratio to enable the first detection temperature to approach the target pure water temperature until the value of the first detection temperature is equal to the value of the target pure water temperature.
The method for controlling the temperature of the PEM water electrolysis hydrogen production water body provided by the embodiment adopts a mode of calculating the duty ratio by using a PI closed-loop algorithm to realize dynamic adjustment of the temperature of pure water, when the temperature of the pure water actually input to the PEM electrolytic stack is too low, the difference between the first detection temperature and the target pure water temperature is used for carrying out PI closed-loop operation, the heating duty ratio is determined, a pulse modulation signal with the heating duty ratio characteristic is output to adjust the heating device and the cooling device, and similarly, when the temperature of the pure water actually input to the PEM electrolytic stack is too high, the difference between the second detection temperature and the target cooling water temperature is used for carrying out PI closed-loop operation, the cooling duty ratio is determined, and the pulse modulation signal with the cooling duty ratio characteristic is output to adjust the heating device and the cooling device, wherein the target cooling water temperature is determined by using the second detection temperature and the third detection temperature. Specifically, in step S500, when the first detected temperature is lower than the target pure water temperature, the heating power of the heating device is increased and the cooling power of the cooling device is decreased according to the calculated heating duty ratio; and when the first detection temperature is higher than the target pure water temperature, reducing the heating power of the heating device and increasing the cooling power of the cooling device according to the calculated cooling duty ratio. Through the steps, the pure water temperature at the inlet of the PEM electrolytic stack is gradually close to the target pure water temperature, and is finally maintained to be equal to the target pure water temperature within the range of +/-1 ℃.
In one embodiment of the step S500, when the first detected temperature is lower than the target pure water temperature, the heating power of the heating device is increased and the cooling power of the cooling device is decreased according to the calculated heating duty ratio, the pulse width modulation signal is generated according to the heating duty ratio, the heating device is triggered to operate at a high level stage of the pulse width modulation signal, and the cooling device is triggered to operate at a low level stage of the pulse width modulation signal; and reducing the heating power of the heating device and increasing the cooling power of the cooling device according to the calculated cooling duty ratio, generating a pulse width modulation signal according to the cooling duty ratio, triggering the cooling device to work at the high level stage of the pulse width modulation signal, and triggering the cooling device to work at the low level stage of the pulse width modulation signal.
When the temperature of pure water actually input to a PEM (proton exchange membrane) electrolytic stack is deviated from a preset target pure water temperature, setting an operation coefficient of PI (proportional integral) closed-loop operation, so that the high-level pulse width of a heating duty ratio or a cooling duty ratio obtained by the PI closed-loop operation is not smaller than the low-level pulse width, exemplarily, the higher the heating duty ratio of a pulse width modulation signal is, the larger the pulse width duty ratio of a high-level stage corresponding to the pulse width modulation signal in a period is, the higher the analog voltage for adjusting a heating device is, and the lower the analog voltage for adjusting the heating device is, so that the technical effects of increasing the heating power of the heating device and reducing the cooling power of the cooling device are achieved, when the temperature of pure water input to the PEM electrolytic stack is equal to the preset target pure water temperature, the high-level pulse width and the low-level pulse width of the heating duty ratio are equal, the power of the heating device is equal to the power of the cooling device, and the temperature of the pure water input to the PEM electrolytic stack is kept equal to the preset target pure water temperature. Therefore, the power of the heating device and the power of the cooling device can be regulated and controlled simultaneously in one period of the pulse modulation signal, and the pulse width for regulating the power of the heating device and the pulse width for regulating the power of the cooling device are dynamically complementary all the time.
Referring to fig. 2, fig. 2 is a flow chart illustrating the method of step S300 according to an embodiment. As shown in fig. 2, the method includes the following steps S310 to S320.
And S310, calculating a difference value between the first detection temperature and the target pure water temperature to obtain a first deviation value.
And S320, performing proportional amplification on the first deviation value and integrating the deviations of all past time through PI closed-loop operation, and further determining the heating duty ratio of pulse width modulation.
In the method of the embodiment, a real-time heating duty ratio is determined by using a dynamic difference value between the first detection temperature and the target pure water temperature, the first deviation value is subjected to proportional amplification through PI closed-loop operation, the deviation of all the past time is subjected to integral, the calculated result of each output can enable the calculated first deviation value to be closer to the target pure water temperature, and the obtained heating duty ratio is also dynamically changed.
The formula for determining the heating duty ratio through PI closed-loop operation is as follows:
Figure BDA0003450721600000071
wherein, PWM heat Denotes the heating duty cycle, K p1 To representFirst coefficient of proportionality, K i1 Denotes a first scale factor, e 1 (t) represents a first deviation value at the current time.
Referring to fig. 3, fig. 3 is a flowchart illustrating the method of step S400 according to an embodiment. As shown in fig. 3, the method includes the following steps S410 to S430.
And S410, calculating a difference value between the second detection temperature and the third detection temperature to obtain the temperature of the target cooling water.
And S420, calculating a difference value between the second detection temperature and the target cooling water temperature to obtain a second deviation value.
And S430, performing proportional amplification on the second deviation value through PI closed-loop operation, and integrating the deviations of all past time to further determine the cooling duty ratio of the pulse width modulation.
In the method of the embodiment, firstly, the difference value between the second detection temperature and the third detection temperature is used for determining the target cooling water temperature, then, the dynamic difference value between the second detection temperature and the target cooling water temperature is used for determining the real-time cooling duty ratio, the second deviation value is subjected to proportional amplification through PI closed-loop operation and the deviation of all past time is subjected to integral, the calculated result of each output can enable the calculated second deviation value to be closer to the target pure water temperature, and the obtained heating duty ratio is also dynamically changed.
The formula for determining the cooling duty cycle through the PI closed loop operation is as follows:
Figure BDA0003450721600000081
wherein, PWM cool Denotes the heating duty ratio, K p2 Denotes a second proportionality coefficient, K i2 Represents a second proportionality coefficient, e 2 (t) represents a second deviation value at the current time.
Referring to fig. 4, fig. 4 is a block diagram of a PEM water electrolysis hydrogen production water body temperature control system according to an embodiment. As shown in fig. 4 and 5, the system includes a cooling water supply 410, a pure water supply 420, a heat exchanger 430, a PEM electrolysis cell 440, and a controller 450, the controller 450 including a detection module 451, a determination module 452, a calculation module 453, and a control module 454, wherein:
the cooling water supply device 410, the pure water supply device 420 and the PEM electrolytic stack 440 are respectively connected with a heat exchanger 430, a heating device is arranged in the pure water supply device 420, the heat exchanger 430 exchanges heat between the cooling water of the cooling water supply device 410 and the pure water of the pure water supply device 420, and outputs the heat exchanged pure water to the PEM electrolytic stack 440;
the detection module 451 is used for detecting pure water at the inlet of the PEM electrolytic stack 440 and obtaining a first detection temperature, detecting cooling water and obtaining a second detection temperature, and detecting the pure water supply device 420 and obtaining a third detection temperature; the PEM electrolysis stack 440 is used for electrolyzing input pure water, the cooling water is used for providing cold energy for the pure water flowing into the PEM electrolysis stack 440 through heat exchange, and the pure water supply device 420 is used for storing the pure water;
the judging module 452 is configured to judge whether the first detected temperature is greater than a set target pure water temperature;
the calculation module 453 is configured to perform PI closed-loop operation according to a difference between the first detected temperature and the target pure water temperature and obtain a heating duty ratio when the first detected temperature is lower than the target pure water temperature; when the first detection temperature is higher than the target pure water temperature, performing PI closed-loop operation according to the second detection temperature and a difference value of the target cooling water temperature determined by the second detection temperature and the third detection temperature to obtain a cooling duty ratio;
the control module 454 is configured to perform pulse width modulation on the heating device and the cooling device according to the cooling duty ratio or the heating duty ratio, so that the first detected temperature approaches the target pure water temperature until the value of the first detected temperature is equal to the value of the target pure water temperature.
In the present embodiment, the detection module 451 detects the temperature of the inlet of the PEM electrolyte stack 440, the cooling water supply 410 and the pure water supply 420, respectively, to obtain a first detected temperature, a second detected temperature and a third detected temperature, and the detection module 451 may be a temperature sensor.
Further, the output end of the heat exchanger 430 is connected with the cooling water supply device 410, the heat exchanger 430 outputs the cooling water after heat exchange to the cooling water supply device 410, the PEM electrolytic stack 440 is connected with the pure water supply device 420, and the PEM electrolytic stack 440 outputs the electrolyzed pure water to the pure water supply device 420.
Furthermore, a temperature control valve 460 is disposed on a connection path between the cooling water supply device 410 and the heat exchanger 430, and the control module 454 adjusts an opening degree of the temperature control valve 460 according to a cooling duty ratio or a heating duty ratio.
The PEM water electrolysis hydrogen production water body temperature control system executes the PEM water electrolysis hydrogen production water body temperature control method of the first aspect, and the specific limitations on the PEM water electrolysis hydrogen production water body temperature control system can be referred to the limitations on the PEM water electrolysis hydrogen production water body temperature control method in the above, and are not described herein again.
All modules in the PEM water electrolysis hydrogen production water body temperature control system can be completely or partially realized through software, hardware and combination thereof. The modules can be embedded in a hardware form or independent of a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
According to a third aspect of the invention, a computer device is provided.
Referring to fig. 6, fig. 6 is an internal structural diagram of a computer device according to an embodiment. As shown in fig. 6, the computer device includes a processor, a memory, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The computer program is executed by a processor to realize the temperature control method of the PEM water electrolysis hydrogen production water body in the first aspect.
The memory and processor elements are electrically connected to each other, directly or indirectly, to enable data transfer or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The processor is used for calculating the temperature control duty cycle and controlling temperature rise or fall, and the processor comprises at least one software functional module which can be stored in a memory in the form of software or firmware or solidified in an Operating System (OS) of the server. The processor is configured to execute the executable modules stored in the memory.
The Memory may be a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Read Only Memory (EPROM), an electrically Erasable Read Only Memory (EEPROM), or the like. The memory is used for storing programs and voice data, and the processor executes the programs after receiving the execution instructions.
The processor may be an integrated circuit chip having signal processing capabilities. The Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The processor couples various input/output devices to the processor as well as to the memory. In some embodiments, the processor and memory may be implemented in a single chip. In other examples, they may be implemented separately from the individual chips.
The peripheral interface couples various input/output devices to the processor as well as to the memory. In some embodiments, the peripheral interface, the processor, and the memory may be implemented in a single chip. In other examples, they may be implemented separately from the individual chips.
According to the fourth aspect of the present invention, there is also provided a computer storage medium, in which a computer program is stored, the computer storage medium may be a magnetic random access memory, a read only memory, a programmable read only memory, an erasable programmable read only memory, an electrically erasable programmable read only memory, a flash memory, a magnetic surface memory, an optical disc, a read only optical disc, or the like; or may be a variety of devices including one or any combination of the above memories, such as a mobile phone, computer, tablet device, personal digital assistant, etc. When being executed by a processor, the computer program realizes the temperature control method of the PEM water electrolysis hydrogen production water body in the first aspect.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A PEM water electrolysis hydrogen production water temperature control method is characterized by comprising the following steps:
detecting pure water entering an inlet of the PEM electrolytic stack to obtain a first detection temperature, detecting cooling water to obtain a second detection temperature, and detecting pure water in the pure water supply device to obtain a third detection temperature; the PEM electrolytic stack is used for electrolyzing input pure water, the cooling water is used for providing cold energy for the pure water flowing into the PEM electrolytic stack through heat exchange, and the pure water supply device is used for storing the pure water;
judging whether the first detection temperature is higher than a set target pure water temperature or not;
when the first detection temperature is lower than the target pure water temperature, carrying out PI closed-loop operation according to the difference value of the first detection temperature and the target pure water temperature and obtaining a heating duty ratio;
when the first detection temperature is higher than the target pure water temperature, performing PI closed-loop operation according to the second detection temperature and a difference value of the target cooling water temperature determined by the second detection temperature and the third detection temperature to obtain a cooling duty ratio;
and when the first detection temperature is higher than the target pure water temperature, the heating power of the heating device is reduced and the cooling power of the cooling device is increased according to the calculated cooling duty ratio.
2. The method for controlling the temperature of the PEM water electrolysis hydrogen production water body according to claim 1, wherein the step of performing PI closed-loop operation according to the difference between the first detection temperature and the target pure water temperature and obtaining the heating duty ratio comprises the following steps:
calculating the difference value between the first detection temperature and the target pure water temperature to obtain a first deviation value;
and carrying out proportional amplification on the first deviation value and integrating the deviations of all past time through PI closed-loop operation, and further determining the heating duty ratio of pulse width modulation.
3. The method for controlling the temperature of the PEM water electrolysis hydrogen production water body according to claim 1, wherein the step of performing PI closed loop operation according to the second detection temperature and the difference value of the target cooling water temperature determined by the second detection temperature and the third detection temperature to obtain the cooling duty ratio comprises the following steps:
calculating the difference value of the second detection temperature and the third detection temperature to obtain the temperature of the target cooling water;
calculating a difference value between the second detection temperature and the target cooling water temperature to obtain a second deviation value;
and proportionally amplifying the second deviation value and integrating the deviations of all past time through PI closed-loop operation so as to determine the cooling duty ratio of the pulse width modulation.
4. The method for controlling the temperature of the PEM water electrolysis hydrogen production water body according to claim 1, wherein the step of modulating the pulse width of the heating device and the temperature reduction device according to the cooling duty ratio or the heating duty ratio comprises the following steps:
when the first detection temperature is lower than the target pure water temperature, increasing the heating power of a heating device and reducing the cooling power of a cooling device according to the calculated heating duty ratio;
and when the first detection temperature is higher than the target pure water temperature, reducing the heating power of the heating device and increasing the cooling power of the cooling device according to the calculated cooling duty ratio.
5. The temperature control method for the PEM water body with hydrogen production by electrolysis according to claim 4,
increasing the heating power of the heating device and reducing the cooling power of the cooling device according to the calculated heating duty cycle comprises: generating a pulse width modulation signal according to the heating duty ratio, triggering a heating device to work at a high level stage of the pulse width modulation signal, and triggering a cooling device to work at a low level stage of the pulse width modulation signal;
the reducing the heating power of the heating device and increasing the cooling power of the cooling device according to the calculated cooling duty cycle includes: and generating a pulse width modulation signal according to the cooling duty ratio, triggering the temperature reduction device to work at the high level stage of the pulse width modulation signal, and triggering the temperature reduction device to work at the low level stage of the pulse width modulation signal.
6. A water body temperature control system for hydrogen production by PEM water electrolysis is characterized by comprising a cooling water supply device, a pure water supply device, a heat exchanger, a PEM electrolytic stack and a controller, wherein the controller comprises a detection module, a judgment module, a calculation module and a control module;
the cooling water supply device, the pure water supply device and the PEM electrolytic stack are respectively connected with a heat exchanger, a heating device is arranged in the pure water supply device, and the heat exchanger carries out heat exchange on the cooling water of the cooling water supply device and the pure water of the pure water supply device and outputs the heat-exchanged pure water to the PEM electrolytic stack;
the detection module is used for detecting pure water at an inlet of the PEM electrolytic stack to obtain a first detection temperature, detecting cooling water to obtain a second detection temperature, and detecting the pure water supply device to obtain a third detection temperature; the PEM electrolytic stack is used for electrolyzing input pure water, the cooling water is used for providing cold energy for the pure water flowing into the PEM electrolytic stack through heat exchange, and the pure water supply device is used for storing the pure water;
the judging module is used for judging whether the first detection temperature is greater than the set target pure water temperature;
the calculation module is used for carrying out PI closed-loop operation according to the difference value between the first detection temperature and the target pure water temperature and obtaining a heating duty ratio when the first detection temperature is lower than the target pure water temperature; when the first detection temperature is higher than the target pure water temperature, performing PI closed-loop operation according to the second detection temperature and a difference value of the target cooling water temperature determined by the second detection temperature and the third detection temperature to obtain a cooling duty ratio;
the control module is used for carrying out pulse width modulation on the heating device and the cooling device according to the cooling duty ratio or the heating duty ratio, so that the first detection temperature tends to the target pure water temperature until the value of the first detection temperature is equal to that of the target pure water temperature, when the first detection temperature is smaller than the target pure water temperature, the heating power of the heating device is increased and the cooling power of the cooling device is reduced according to the heating duty ratio obtained through calculation, and when the first detection temperature is larger than the target pure water temperature, the heating power of the heating device is reduced and the cooling power of the cooling device is increased according to the cooling duty ratio obtained through calculation.
7. The PEM water electrolysis hydrogen production water body temperature control system according to claim 6, wherein the output end of the heat exchanger is connected with a cooling water supply device, the heat exchanger outputs the cooling water after heat exchange to the cooling water supply device, the PEM electrolytic stack is connected with a pure water supply device, and the PEM electrolytic stack outputs the electrolyzed pure water to the pure water supply device.
8. The PEM water electrolysis hydrogen production water body temperature control system according to claim 6, wherein a temperature control valve is arranged on a connecting passage of the cooling water supply device and the heat exchanger, and the control module adjusts the opening degree of the temperature control valve according to a cooling duty ratio or a heating duty ratio.
9. A computer device, comprising:
a memory storing a computer program;
a processor which, when executing the computer program, implements the PEM water electrolysis hydrogen production water body temperature control method according to any one of claims 1-5.
10. A computer storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the PEM water electrolysis hydrogen production water body temperature control method according to any one of claims 1-5.
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