CN115863707A - Temperature and humidity adjusting system for fuel cell and control method thereof - Google Patents
Temperature and humidity adjusting system for fuel cell and control method thereof Download PDFInfo
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- CN115863707A CN115863707A CN202211719884.7A CN202211719884A CN115863707A CN 115863707 A CN115863707 A CN 115863707A CN 202211719884 A CN202211719884 A CN 202211719884A CN 115863707 A CN115863707 A CN 115863707A
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- 238000001816 cooling Methods 0.000 claims abstract description 28
- 238000000926 separation method Methods 0.000 claims abstract description 22
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- 230000009191 jumping Effects 0.000 claims description 96
- 239000002826 coolant Substances 0.000 claims description 68
- 230000001276 controlling effect Effects 0.000 claims description 7
- 239000012528 membrane Substances 0.000 description 10
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention discloses a temperature and humidity regulating system of a fuel cell and a control method thereof, wherein the temperature and humidity regulating system comprises a steam module, a humidifying module, a steam-water separation module, a cooling module, a heating module and a detection module which are sequentially communicated, the temperature and humidity regulating system has a non-humidifying working mode and a humidifying working mode, when the temperature and humidity regulating system is in the non-humidifying working mode, the steam module is in a locking state, and the humidifying module, the steam-water separation module, the cooling module, the heating module and the detection module are in working states; when the temperature and humidity adjusting system is in a humidifying working mode, the steam module, the humidifying module, the steam-water separation module, the cooling module, the warming module and the detection module are all in working states. The temperature and humidity adjusting system of the fuel cell can flexibly adjust the working mode of the system to be a non-humidifying working mode or a humidifying working mode according to different application requirements, and is convenient to use.
Description
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a temperature and humidity adjusting system of a fuel cell and a control method thereof.
Background
A fuel cell is an energy conversion device that directly converts chemical energy of fuel into electrical energy through an electrochemical reaction process, and is considered as a potential alternative energy technology due to high energy conversion efficiency. Among various types of fuel cells, proton membrane fuel cells have been rapidly developed in recent years due to their advantages of high energy density, low operating temperature, small volume and weight, fast start-up speed, safe and reliable operation, low noise, zero pollution, convenient modular installation and operation, and have been gradually applied to the industries of automobiles, energy sources, ships, aerospace, household appliances, and the like. In the operation process of the proton membrane fuel cell, in order to improve the proton conductivity, the membrane needs to have certain hydration degree, the membrane degradation can be accelerated by low-humidification or non-humidification operation, too much water can obstruct the transportation of reactants, and the hydration effect is not only unfavorable for the performance of the fuel cell, and the service life can be influenced. In order to ensure that the proton membrane has proper hydration degree under various operating conditions, the fuel cell mostly adopts an external humidification method, namely, reactants before entering a reaction flow field are humidified so as to increase the humidity and the humidity uniformity of the reaction field. Therefore, the humidification system becomes an important auxiliary system that affects the performance and durability of the proton membrane fuel cell system. In the operation process of a general high-power proton membrane fuel cell, the humidity of a reactant needs to be controlled in a proper range, and meanwhile, as the dynamic operation working conditions of the fuel cell are more, the load changes frequently and quickly, the humidity needs to be capable of responding quickly along with the dynamic change of the load. Therefore, designing a proper humidification system and a proper control method are of great significance to the wide application of the fuel cell.
Currently, the humidification methods for proton membrane fuel cell systems mainly include membrane humidification, spray humidification, and bubble humidification. For portable or vehicular applications, membrane humidification is more conducive to weight reduction and space reduction. For stationary applications, space is not strictly limited, but there is a greater power requirement for humidification, in which case gas bubbling, spray or mist humidification is more appropriate. However, because the internal material selection or flow field design of the fuel cell stack to be tested is different, the requirements for temperature and humidity are different, and the existing humidity adjusting system cannot adjust according to different application requirements.
Disclosure of Invention
In view of the above technical problems, an object of the present invention is to provide an improved temperature and humidity adjustment system for a fuel cell and a control method thereof, which can flexibly adjust the operating mode of the system to be a non-humidification operating mode or a humidification operating mode according to different application requirements, and are convenient to use.
In order to achieve the purpose, the invention adopts the technical scheme that:
a control method of a temperature and humidity adjusting system of a fuel cell comprises a steam module, a humidification module, a steam-water separation module, a cooling module, a heating module and a detection module which are sequentially communicated, wherein the temperature and humidity adjusting system has a non-humidification working mode and a humidification working mode, when the temperature and humidity adjusting system is in the non-humidification working mode, the steam module is in a locked state, and the humidification module, the steam-water separation module, the cooling module, the heating module and the detection module are in working states; when the temperature and humidity adjusting system is in a humidifying working mode, the steam module, the humidifying module, the steam-water separation module, the cooling module, the heating module and the detection module are all in a working state.
Preferably, when the temperature and humidity adjusting system is in a non-humidification operating mode, the temperature sensor in the detection module detects the real-time temperature of the gas, and compares the real-time temperature of the gas with a preset target temperature of the gas, so as to control the cooling medium adjusting valve in the cooling module and the heating medium adjusting valve in the heating module;
when the temperature and humidity adjusting system is in a humidifying working mode, the humidity sensor in the detection module detects the real-time humidity of the gas, compares the real-time humidity of the gas with the preset target humidity of the gas, and then controls the steam adjusting valve in the steam module.
Further, when the temperature and humidity adjusting system is in a non-humidification working mode, if the real-time temperature of the gas is equal to the target temperature of the gas, the opening degrees of the cooling medium adjusting valve and the heating medium adjusting valve are maintained; if the real-time gas temperature is higher than the target gas temperature, reducing the opening of the heating medium regulating valve and/or increasing the opening of the cooling medium regulating valve; and if the real-time gas temperature is lower than the target gas temperature, reducing the opening of the cooling medium regulating valve and/or increasing the opening of the heating medium regulating valve.
Further, the opening degree of the cooling medium adjusting valve has a first position to which the discharge amount of the cooling medium is lower than the discharge amount of the cooling medium when the cooling medium adjusting valve is in the other position; the opening degree of the heating medium regulating valve has a second position, and when the heating medium regulating valve is regulated to the second position, the discharge amount of the heating medium is lower than that of the heating medium when the heating medium regulating valve is at other positions.
Still further, the control method includes the steps of:
s101, the system receives a non-humidification working mode instruction and jumps to the step S102;
s102, locking the steam module, stopping working of all parts in the steam module, and jumping to the step S103;
s103, receiving a gas flow target value, counting the flow of gas to be humidified in real time by a humidifying flow meter in the humidifying module, adjusting a humidifying adjusting valve in the humidifying module until the real-time flow value of the humidified gas detected by the humidifying flow meter is consistent with the gas flow target value, and jumping to the step S104;
s104, detecting whether a gas target temperature is input or not by the system, and if not, jumping to the step S102; if yes, jumping to step S105;
s105, comparing the real-time gas temperature detected by the temperature sensor with the target gas temperature, and jumping to the step S106 if the real-time gas temperature is equal to the target gas temperature; if the real-time gas temperature is lower than the target gas temperature, jumping to step S107; if the real-time gas temperature is higher than the target gas temperature, jumping to step S114;
s106, maintaining the opening degree of the cooling medium adjusting valve;
s107, reducing the opening degree of the cooling medium regulating valve and jumping to the step S108;
s108, comparing the real-time gas temperature with the target gas temperature, and jumping to the step S109 if the real-time gas temperature is greater than or equal to the target gas temperature; otherwise, jumping to step S110;
s109, maintaining the opening degree of the cooling medium adjusting valve;
s110, judging whether the opening degree of the cooling medium regulating valve reaches the first position or not, and if so, jumping to the step S111; if not, jumping to the step S107;
s111, increasing the opening degree of the heating medium regulating valve and jumping to the step S112;
s112, comparing the real-time gas temperature with the target gas temperature, and if the real-time gas temperature is greater than or equal to the target gas temperature, jumping to the step S113; otherwise, jumping to step S111;
s113, maintaining the opening degree of the heating medium regulating valve;
s114, reducing the opening degree of the heating medium regulating valve and jumping to S115;
s115, comparing the real-time gas temperature with the target gas temperature, and if the real-time gas temperature is less than or equal to the target gas temperature, skipping to the step S116; otherwise, jumping to step S117;
s116, maintaining the opening degree of the heating medium regulating valve;
s117, judging whether the opening of the heating medium regulating valve reaches the second position, and if so, jumping to a step S118; if not, jumping to step S114;
s118, increasing the opening degree of the cooling medium adjusting valve and jumping to the step S119;
s119, comparing the real-time gas temperature with the target gas temperature, and jumping to the step S120 if the real-time gas temperature is less than or equal to the target gas temperature; otherwise, jumping to step S118;
and S120, maintaining the opening degree of the cooling medium regulating valve.
Further, when the temperature and humidity adjusting system is in a humidifying working mode, if the real-time humidity of the gas is equal to the target humidity of the gas, the opening degree of the steam adjusting valve is maintained; if the real-time humidity of the gas is higher than the target temperature of the gas, the opening degree of the steam regulating valve is reduced; and if the real-time humidity of the gas is less than the target humidity of the gas, increasing the opening of the steam regulating valve.
Still further, the method comprises the steps of:
s201, the system receives a humidifying work mode instruction and jumps to S202;
s202, starting the steam module to enable the steam module to be in a standby state;
s203, receiving a gas flow target value, counting the flow of the gas to be humidified in real time by a humidifying flow meter in the humidifying module, adjusting a humidifying adjusting valve in the humidifying module until the real-time flow value of the humidified gas detected by the humidifying flow meter is consistent with the gas flow target value, and jumping to the step S204;
s204, detecting whether the target humidity of the input gas is detected by the system, and if not, skipping to the step S202; if yes, jumping to step S205;
s205, comparing the real-time humidity of the gas detected by the humidity sensor with the target humidity of the gas, and if the real-time humidity of the gas is equal to the target humidity of the gas, jumping to S206; if the real-time gas humidity is less than the target gas humidity, jumping to step S207; if the real-time gas humidity is greater than the target gas humidity, jumping to step S210;
s206, maintaining the opening degree of the steam regulating valve;
s207, increasing the opening of the steam regulating valve and jumping to the step S208;
s208, comparing the real-time gas humidity with the target gas humidity, and if the real-time gas humidity is greater than or equal to the target gas humidity, skipping to the step S209; otherwise, jumping to step S207;
s209, maintaining the opening degree of the steam regulating valve;
s210, reducing the opening degree of the steam regulating valve and jumping to the step S211;
s211, comparing the real-time gas humidity with the target gas humidity, and if the real-time gas humidity is less than or equal to the target gas humidity, jumping to S212; otherwise, jumping to step S210;
and S212, maintaining the opening degree of the steam regulating valve.
The utility model provides a fuel cell temperature and humidity control system, temperature and humidity control system is including the steam module, humidification module, the steam-water separation module, cooling module and the intensification module that communicate in proper order, the steam module includes steam control valve, and it is used for controlling the flow of steam.
Preferably, the cooling module of the temperature and humidity adjusting system comprises a cooling medium adjusting valve for adjusting the flow of the cooling medium.
Further, the temperature rising module of the temperature and humidity adjusting system comprises a heating medium adjusting valve which is used for adjusting the flow of the heating medium.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the temperature and humidity adjusting system of the fuel cell can flexibly adjust the working mode of the system to be a non-humidifying working mode or a humidifying working mode according to different application requirements, a steam module is in a locking state when the system is adjusted to be the non-humidifying working mode, and the system is mainly used for adjusting the real-time temperature of gas; the steam module is in operating condition when the system adjustment is humidification mode, and the system can adjust gaseous real-time temperature and real-time humidity simultaneously, and convenient to use can adapt to the multiple application demand of different scenes.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a flowchart of a control method when a temperature and humidity control system is in a non-humidification operating mode according to an embodiment of the present invention;
fig. 2 is a flowchart of a control method when the temperature and humidity control system is in the humidification operating mode according to the embodiment of the present invention;
FIG. 3 is a schematic diagram of a temperature and humidity control system according to an embodiment of the present disclosure;
wherein, 1, a steam module; 11. a steam generator; 12. a steam flow meter; 13. a steam regulating valve; 2. a humidifying module; 21. a humidifying adjusting valve; 22. a humidifying flow meter; 23. a humidifier; 24. a first solenoid valve; 3. a steam-water separation module; 31. a steam-water separator; 32. a second solenoid valve; 33. a condensate recovery device; 34. a liquid level meter; 4. a cooling module; 41. a cooling medium regulating valve; 42. a cooler; 43. a cooling medium recovery device; 5. a temperature rising module; 51. a heating medium regulating valve; 52. a heater; 53. a heating medium recovery device; 6. a detection module; 61. a humidity sensor; 62. a temperature sensor.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the invention may be more readily understood by those skilled in the art. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The temperature and humidity adjusting system in the embodiment comprises a steam module 1, a humidifying module 2, a steam-water separation module 3, a cooling module 4 and a heating module 5 which are sequentially communicated, the temperature and humidity adjusting system has a non-humidifying working mode and a humidifying working mode, when the temperature and humidity adjusting system is in the non-humidifying working mode, the steam module 1 is in a locked state, and the humidifying module 2, the steam-water separation module 3, the cooling module 4 and the heating module 5 are in working states; when the temperature and humidity adjusting system is in a humidifying working mode, the steam module 1, the humidifying module 2, the steam-water separating module 3, the cooling module 4 and the warming module 5 are in working states.
In this embodiment, a fuel cell testing system is taken as an example, and when a fuel cell stack is taken as an example of a humidification object, due to different internal material selection or flow field design of the fuel cell stack of the testing object, humidity requirements are different, and some require high humidity and some require low humidity or no external humidification. In the present embodiment, a fuel cell power system or a power generation system is taken as an example, and the humidity requirement is different due to different operation conditions (such as low power operation in some cases and high power operation in some cases). In order to cover all application requirements, the system divides the working mode of the system into a non-humidifying working mode and a humidifying working mode. Wherein the system does not need external humidification in the non-humidification working mode.
The following detailed description is made of the control method of the temperature and humidity adjusting system in the non-humidification working mode and the humidification working mode:
as shown in fig. 1, when the temperature and humidity control system is in the non-humidification operating mode, the temperature sensor in the detection module 6 detects the real-time temperature of the gas, and compares the real-time temperature of the gas with a preset target temperature of the gas, so as to control the cooling medium regulating valve 41 in the cooling module 4 and the heating medium regulating valve 51 in the warming module 5. Specifically, when the temperature/humidity control system is in the non-humidification operation mode, if the real-time gas temperature and the target gas temperature are equal to each other, the opening degrees of the cooling medium adjustment valve 41 and the heating medium adjustment valve 51 are maintained. If the real-time gas temperature is greater than the target gas temperature, the opening degree of the heating medium regulating valve 51 is decreased or the opening degree of the cooling medium regulating valve 41 is increased; in other embodiments, it is also possible to simultaneously decrease the opening degree of the heating medium adjusting valve 51 and increase the opening degree of the cooling medium adjusting valve 41. If the real-time gas temperature is less than the target gas temperature, the opening degree of the cooling medium regulating valve 41 is decreased or the opening degree of the heating medium regulating valve 51 is increased; in other embodiments, it is also possible to simultaneously decrease the opening degree of the cooling medium adjusting valve 41 and increase the opening degree of the heating medium adjusting valve 51.
Because the internal materials of the fuel cell stack to be tested are selected or the flow field design is different, the requirements on the air inlet temperature are different, some require higher air inlet temperature, and some require lower air inlet temperature. In the present embodiment, when a fuel cell power system or a power generation system is taken as an example, the requirements for the intake air temperature are different due to different operation conditions (such as low power operation in some cases and high power operation in some cases), and the system temperature design is adjustable according to the requirements in order to cover all application requirements.
The opening degree of the cooling medium adjusting valve 41 has a first position to which the discharge amount of the cooling medium is lower than that when the cooling medium adjusting valve 41 is in the other position (i.e., the opening degree of the cooling medium adjusting valve 41 is minimum). The opening degree of the heating medium adjusting valve 51 has a second position to which the discharge amount of the heating medium is lower when the heating medium adjusting valve 51 is adjusted than when the heating medium adjusting valve 51 is in the other position (i.e., the opening degree of the heating medium adjusting valve 51 is minimum). Specifically, if the flow rate of the cooling medium is high, the outlet temperature of the hot-side medium is low, and if the flow rate of the cooling medium is low, the outlet temperature of the hot-side medium is high; when the flow rate of the heating medium is large, the outlet temperature of the cold-side medium is high, and when the flow rate of the heating medium is small, the outlet temperature of the cold-side medium is low. The flow rate of the cooling medium is controlled by the opening degree of the cooling medium adjusting valve 41, when the opening degree of the cooling medium adjusting valve 41 is not changed, the flow rate of the cooling medium is not changed, and the outlet temperature of the hot-side gas is not changed; when the opening degree of the cooling medium adjusting valve 41 is decreased, the cooling medium flow rate is decreased, and the outlet temperature of the hot-side gas is increased. The opening degree of the heating medium adjusting valve 51 controls the flow rate of the heating medium, and when the opening degree of the heating medium adjusting valve 51 increases, the flow rate of the heating medium increases, and the outlet temperature of the cold-side gas increases.
When the temperature and humidity adjusting system is in a non-humidifying working mode, the control method specifically comprises the following steps:
s101, the system receives a non-humidification working mode instruction and jumps to S102;
s102, locking the steam module 1, stopping working of all parts in the steam module 1, and jumping to the step S103;
s103, receiving a gas flow target value, counting the flow of the gas to be humidified in real time by the humidifying flow meter 22 in the humidifying module 2, adjusting the humidifying adjusting valve 21 in the humidifying module 2 until the real-time flow value of the humidified gas detected by the humidifying flow meter 22 is consistent with the gas flow target value, and jumping to the step S104;
s104, detecting whether a gas target temperature is input or not by the system, and if not, jumping to the step S102; if yes, jumping to step S105;
s105, comparing the real-time gas temperature detected by the temperature sensor 61 with the target gas temperature, and jumping to the step S106 if the real-time gas temperature is equal to the target gas temperature; if the real-time gas temperature is lower than the target gas temperature, jumping to step S107; if the real-time gas temperature is higher than the target gas temperature, jumping to step S114;
s106, maintaining the opening degree of the cooling medium control valve 41;
s107, reducing the opening degree of the cooling medium adjusting valve 41 and jumping to the step S108;
s108, comparing the real-time gas temperature with the target gas temperature, and jumping to the step S109 if the real-time gas temperature is greater than or equal to the target gas temperature; otherwise, jumping to step S110;
s109, maintaining the opening degree of the cooling medium adjusting valve 41;
s110, judging whether the opening degree of the cooling medium regulating valve reaches a first position or not, and if so, jumping to the step S111; if not, jumping to step S107;
s111, increasing the opening degree of the heating medium regulating valve 51 and jumping to the step S112;
s112, comparing the real-time gas temperature with the target gas temperature, and jumping to the step S113 if the real-time gas temperature is greater than or equal to the target gas temperature; otherwise, jumping to step S111;
s113, maintaining the opening degree of the heating medium adjusting valve 51;
s114, reducing the opening degree of the heating medium regulating valve 51 and jumping to S115;
s115, comparing the real-time gas temperature with the target gas temperature, and jumping to the step S116 if the real-time gas temperature is less than or equal to the target gas temperature; otherwise, jumping to step S117;
s116, maintaining the opening degree of the heating medium regulating valve 51;
s117, determining whether the opening degree of the heating medium adjusting valve 51 reaches the second position, and if so, proceeding to step S118; if not, jumping to step S114;
s118, increasing the opening degree of the cooling medium adjustment valve 41, and proceeding to step S119;
s119, comparing the real-time gas temperature with the target gas temperature, and jumping to the step S120 if the real-time gas temperature is less than or equal to the target gas temperature; otherwise, jumping to step S118;
and S120, maintaining the opening degree of the cooling medium adjusting valve 41.
As shown in fig. 2, when the temperature and humidity control system is in the humidification operating mode, the humidity sensor 61 in the detection module 6 detects the real-time humidity of the gas, and compares the real-time humidity of the gas with the preset target humidity of the gas, thereby controlling the steam regulating valve 13 in the steam module 1. Specifically, if the real-time humidity of the gas is equal to the target humidity of the gas, the opening degree of the steam regulating valve 13 is maintained; if the real-time humidity of the gas is higher than the target temperature of the gas, the opening degree of the steam regulating valve 13 is reduced; if the real-time humidity of the gas is less than the target humidity of the gas, the opening degree of the steam adjusting valve 13 is increased.
When the temperature and humidity adjusting system is in the humidifying working mode, the control method specifically comprises the following steps:
s201, the system receives a humidifying work mode instruction and jumps to S202;
s202, starting the steam module 1 to enable the steam module to be in a standby state;
s203, receiving a gas flow target value, counting the flow of the gas to be humidified in real time by the humidifying flow meter 22 in the humidifying module 2, adjusting the humidifying adjusting valve 21 in the humidifying module 2 until the real-time flow value of the humidified gas detected by the humidifying flow meter 22 is consistent with the gas flow target value, and jumping to the step S204;
s204, detecting whether the target humidity of the input gas is detected by the system, and if not, skipping to the step S202; if yes, jumping to step S205;
s205, comparing the real-time gas humidity detected by the humidity sensor 61 with the target gas humidity, and if the real-time gas humidity is equal to the target gas humidity, skipping to S206; if the real-time humidity of the gas is less than the target humidity of the gas, jumping to step S207; if the real-time gas humidity is greater than the target gas humidity, jumping to step S210;
s206, maintaining the opening degree of the steam regulating valve 13;
s207, increasing the opening degree of the steam regulating valve 13 and jumping to the step S208;
s208, comparing the real-time gas humidity with the target gas humidity, and if the real-time gas humidity is greater than or equal to the target gas humidity, jumping to the step S209; otherwise, jumping to step S207;
s209, maintaining the opening degree of the steam regulating valve 13;
s210, reducing the opening degree of the steam regulating valve 13 and jumping to the step S211;
s211, comparing the real-time gas humidity with the target gas humidity, and jumping to the step S212 if the real-time gas humidity is less than or equal to the target gas humidity; otherwise, jumping to step S210;
and S212, maintaining the opening degree of the steam regulating valve 13.
The temperature and humidity adjusting system of the fuel cell in the embodiment comprises a steam module 1, a humidification module 2, a steam-water separation module 3, a cooling module 4, a heating module 5 and a detection module 6 which are sequentially communicated.
The following describes each module and its structure in detail:
the steam module 1 is used to provide steam. Specifically, the steam module 1 comprises a steam generator 11, a steam flow meter 12 and a steam regulating valve 13 which are communicated in sequence, wherein the steam generator 11 is used for generating and storing steam and is provided with a steam storage space; the steam flow meter 12 is used for measuring the flow of the steam in real time, and the steam regulating valve 13 is used for controlling the flow of the steam.
The humidifying module 2 is communicated with the steam module 1 and is used for mixing the steam conveyed by the steam module 1 with the gas to be humidified and completing humidification. Specifically, the humidification module 2 comprises a humidification regulating valve 21, a humidification flow meter 22, a humidifier 23 and a first electromagnetic valve 24 which are sequentially communicated, wherein the humidification regulating valve 21 is used for controlling the flow of the gas to be humidified; the humidifying flow meter 22 is used for measuring the flow of the gas to be humidified in real time; the humidifier 23 is used for providing a mixing and humidifying place for the steam and the gas to be humidified which are conveyed by the steam module 1, and the humidifier 23 is communicated with the steam flow meter 12; the first electromagnetic valve 24 is arranged below the humidifier 23 and used for discharging the condensate and conveying the condensate to the condensate recovery device 33, so that the condensate can be recycled, and the cost is saved.
The steam-water separation module 3 is communicated with the humidification module 2 and is used for separating humidified gas and moisture. Specifically, the steam-water separation module comprises a steam-water separator 31, a second electromagnetic valve 32 and a condensate recovery device 33 which are sequentially communicated, a liquid level meter 34 is further arranged between the steam-water separator 31 and the second electromagnetic valve 32, wherein the steam-water separator 31 is used for separating moisture in the humidified gas, and the steam-water separator 31 is communicated with the humidifier 23. The second electromagnetic valve 32 is disposed below the steam-water separator 31, and is used for discharging the condensate and conveying the condensate to the condensate recovery device 33. The level gauge 34 is used to gauge the accumulated amount of condensate in real time so that the second solenoid valve 32 can discharge condensate in a timely manner.
The cooling module 4 is communicated with the steam-water separation module 3, and the cooling module 4 is used for cooling the gas after steam-water separation. Specifically, the cooling module comprises a cooling medium regulating valve 41, a cooler 42 and a cooling medium recovery device 43 which are sequentially communicated, wherein the cooling medium regulating valve 41 is used for regulating the flow of the cooling medium. The cooler 42 provides a cooling place for the steam-water separated gas, and the cooler 42 is communicated with the steam-water separator 31. The cooling medium recovery device 43 is used for recovering the cooling medium, and is communicated with the cooler 42, so that the cost can be effectively reduced by recovering and recycling the cooling medium.
The temperature raising module 5 is communicated with the cooling module 4 and is used for raising the temperature of the gas after steam-water separation. Specifically, the temperature raising module 5 includes a heating medium regulating valve 51, a heater 52 and a heating medium recovery device 53 which are sequentially communicated, wherein the heating medium regulating valve 51 is used for regulating the flow rate of the heating medium. The heater 52 provides a heating place for the gas after steam-water separation, and the heater 52 is respectively communicated with the heating medium regulating valve 51 and the cooler 42. The heating medium recovery device 53 is used for recovering the heating medium, is communicated with the heater 52, and can effectively reduce the cost by recovering and recycling the heating medium.
The detection module 6 is conducted with the warming module 5 and is used for detecting the real-time temperature and humidity of the gas. Specifically, the detection module 6 includes a humidity sensor 61 and a temperature sensor 62, and both the humidity sensor 61 and the temperature sensor 62 are communicated with the heater 52. If the humidity sensor 61 detects that the real-time humidity of the gas is inconsistent with the preset target humidity of the gas, the opening of the steam regulating valve 13 is adjusted, so that the steam flow is controlled; if the temperature sensor 62 detects that the real-time temperature of the gas is not consistent with the preset target temperature of the gas, the opening degree of the cooling medium regulating valve 41 or the heating medium regulating valve 51 is adjusted, so that the flow of the cooling medium or the heating medium is controlled, and the real-time temperature of the gas is changed.
In summary, the temperature and humidity adjusting system for the fuel cell mainly comprises a steam module, a humidification module, a steam-water separation module, a cooling module, a heating module and a detection module, and can realize effective adjustment and control of the temperature and humidity of various objects and working conditions under two working modes of non-humidification and humidification through reasonable design and matching of the functional modules. The humidity adjusting process does not need to heat or cool water with a certain volume immediately, so that the problem of low humidity response rate caused by inherent characteristics of water volume and water specific heat is solved, and automatic humidity following and quick response are realized when the demand of load dynamic load increasing and reducing gas flow changes.
As used in this specification and the appended claims, the terms "comprises" and "comprising" are intended to only encompass the explicitly identified steps and elements, which do not constitute an exclusive list, and that a method or apparatus may include other steps or elements. As used herein, the term "and/or" includes any combination of one or more of the associated listed items.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Further, the description of the upper, lower, left, right, etc. used in the present invention is only with respect to the positional relationship of the respective components of the present invention with respect to each other in the drawings.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are preferred embodiments, which are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes or modifications made according to the principles of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The control method of the temperature and humidity adjusting system of the fuel cell is characterized in that the temperature and humidity adjusting system comprises a steam module, a humidifying module, a steam-water separation module, a cooling module, a heating module and a detection module which are sequentially communicated, the temperature and humidity adjusting system has a non-humidifying working mode and a humidifying working mode, when the temperature and humidity adjusting system is in the non-humidifying working mode, the steam module is in a locked state, and the humidifying module, the steam-water separation module, the cooling module, the heating module and the detection module are in working states; when the temperature and humidity adjusting system is in a humidifying working mode, the steam module, the humidifying module, the steam-water separation module, the cooling module, the heating module and the detection module are all in a working state.
2. The control method of the temperature and humidity control system of the fuel cell according to claim 1, wherein when the temperature and humidity control system is in a non-humidification operating mode, the temperature sensor in the detection module detects a real-time temperature of the gas, and compares the real-time temperature of the gas with a preset target temperature of the gas, thereby controlling the cooling medium regulating valve in the cooling module and the heating medium regulating valve in the warming module;
when the temperature and humidity adjusting system is in a humidifying working mode, the humidity sensor in the detection module detects the real-time humidity of the gas, compares the real-time humidity of the gas with the preset target humidity of the gas, and then controls the steam adjusting valve in the steam module.
3. The control method of the temperature/humidity control system for a fuel cell according to claim 2, wherein when the temperature/humidity control system is in a non-humidification operation mode, if the real-time temperature of the gas is equal to the target temperature of the gas, the opening degrees of the cooling medium adjustment valve and the heating medium adjustment valve are maintained; if the real-time gas temperature is higher than the target gas temperature, reducing the opening of the heating medium regulating valve and/or increasing the opening of the cooling medium regulating valve; and if the real-time gas temperature is lower than the target gas temperature, reducing the opening of the cooling medium regulating valve and/or increasing the opening of the heating medium regulating valve.
4. The control method of the fuel cell temperature/humidity adjustment system according to claim 3, wherein the opening degree of the cooling medium adjustment valve has a first position, and when the cooling medium adjustment valve is adjusted to the first position, the discharge amount of the cooling medium is lower than the discharge amount of the cooling medium when the cooling medium adjustment valve is in another position; the opening degree of the heating medium regulating valve has a second position, and when the heating medium regulating valve is regulated to the second position, the discharge amount of the heating medium is lower than that of the heating medium when the heating medium regulating valve is at other positions.
5. The control method of the fuel cell temperature and humidity adjustment system according to claim 4, characterized by comprising the steps of:
s101, the system receives a non-humidification working mode instruction and jumps to the step S102;
s102, locking the steam module, stopping working of all parts in the steam module, and jumping to the step S103;
s103, receiving a gas flow target value, counting the flow of the gas to be humidified in real time by a humidifying flow meter in the humidifying module, adjusting a humidifying adjusting valve in the humidifying module until the real-time flow value of the humidified gas detected by the humidifying flow meter is consistent with the gas flow target value, and jumping to the step S104;
s104, detecting whether a gas target temperature is input or not by the system, and if not, jumping to the step S102; if yes, jumping to step S105;
s105, comparing the real-time gas temperature detected by the temperature sensor with the target gas temperature, and jumping to the step S106 if the real-time gas temperature is equal to the target gas temperature; if the real-time gas temperature is lower than the target gas temperature, jumping to step S107; if the real-time gas temperature is higher than the target gas temperature, jumping to step S114;
s106, maintaining the opening degree of the cooling medium adjusting valve;
s107, reducing the opening degree of the cooling medium regulating valve and jumping to the step S108;
s108, comparing the real-time gas temperature with the target gas temperature, and jumping to the step S109 if the real-time gas temperature is greater than or equal to the target gas temperature; otherwise, jumping to step S110;
s109, maintaining the opening degree of the cooling medium adjusting valve;
s110, judging whether the opening degree of the cooling medium regulating valve reaches the first position, and if so, jumping to a step S111; if not, jumping to the step S107;
s111, increasing the opening degree of the heating medium regulating valve and jumping to the step S112;
s112, comparing the real-time gas temperature with the target gas temperature, and if the real-time gas temperature is greater than or equal to the target gas temperature, skipping to the step S113; otherwise, jumping to step S111;
s113, maintaining the opening degree of the heating medium regulating valve;
s114, reducing the opening degree of the heating medium regulating valve and jumping to S115;
s115, comparing the real-time gas temperature with the target gas temperature, and jumping to the step S116 if the real-time gas temperature is less than or equal to the target gas temperature; otherwise, jumping to step S117;
s116, maintaining the opening degree of the heating medium regulating valve;
s117, judging whether the opening degree of the heating medium regulating valve reaches the second position, and if so, jumping to the step S118; if not, jumping to step S114;
s118, increasing the opening degree of the cooling medium adjusting valve and jumping to the step S119;
s119, comparing the real-time gas temperature with the target gas temperature, and jumping to the step S120 if the real-time gas temperature is less than or equal to the target gas temperature; otherwise, jumping to step S118;
and S120, maintaining the opening degree of the cooling medium regulating valve.
6. The control method of the fuel cell temperature and humidity adjustment system according to claim 2, wherein when the temperature and humidity adjustment system is in a humidification operation mode, if the real-time gas humidity is equal to the target gas humidity, the opening of the steam adjustment valve is maintained; if the real-time humidity of the gas is higher than the target temperature of the gas, the opening degree of the steam regulating valve is reduced; and if the real-time humidity of the gas is less than the target humidity of the gas, increasing the opening of the steam regulating valve.
7. The method of controlling the temperature/humidity adjustment system of the fuel cell according to claim 6, characterized by comprising:
s201, the system receives a humidifying work mode instruction and jumps to S202;
s202, starting the steam module to enable the steam module to be in a standby state;
s203, receiving a gas flow target value, counting the flow of the gas to be humidified in real time by a humidifying flow meter in the humidifying module, adjusting a humidifying adjusting valve in the humidifying module until the real-time flow value of the humidified gas detected by the humidifying flow meter is consistent with the gas flow target value, and jumping to the step S204;
s204, detecting whether the target humidity of the input gas is detected by the system, and if not, skipping to the step S202; if yes, jumping to step S205;
s205, comparing the real-time humidity of the gas detected by the humidity sensor with the target humidity of the gas, and if the real-time humidity of the gas is equal to the target humidity of the gas, jumping to S206; if the real-time gas humidity is less than the target gas humidity, jumping to step S207; if the real-time gas humidity is greater than the target gas humidity, jumping to step S210;
s206, maintaining the opening degree of the steam regulating valve;
s207, increasing the opening of the steam regulating valve and jumping to the step S208;
s208, comparing the real-time gas humidity with the target gas humidity, and if the real-time gas humidity is greater than or equal to the target gas humidity, jumping to the step S209; otherwise, jumping to step S207;
s209, maintaining the opening degree of the steam regulating valve;
s210, reducing the opening degree of the steam regulating valve and jumping to the step S211;
s211, comparing the real-time gas humidity with the target gas humidity, and if the real-time gas humidity is less than or equal to the target gas humidity, jumping to S212; otherwise, jumping to step S210;
and S212, maintaining the opening degree of the steam regulating valve.
8. The utility model provides a fuel cell temperature and humidity control system, its characterized in that, temperature and humidity control system is including the steam module, humidification module, steam-water separation module, cooling module and the intensification module that communicate in proper order, the steam module includes steam control valve, and it is used for controlling the flow of steam.
9. The fuel cell temperature and humidity adjustment system according to claim 8, wherein the cooling module of the temperature and humidity adjustment system includes a cooling medium adjustment valve for adjusting a flow rate of the cooling medium.
10. The fuel cell temperature and humidity adjustment system according to claim 9, wherein the temperature raising module of the temperature and humidity adjustment system includes a heating medium adjusting valve for adjusting a flow rate of the heating medium.
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| CN202211719884.7A CN115863707B (en) | 2022-12-30 | 2022-12-30 | Temperature and humidity regulating system of fuel cell and control method thereof |
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| CN101076910A (en) * | 2003-05-02 | 2007-11-21 | 张超迥 | Dew-point humididier and temperature control for corresponding gas |
| CN112490474A (en) * | 2020-11-26 | 2021-03-12 | 合肥科威尔电源系统股份有限公司 | Gas humidifying device of fuel cell system |
| CN112952150A (en) * | 2021-02-01 | 2021-06-11 | 佛山仙湖实验室 | Humidifier system for fuel cell engine and humidification method |
| CN113809364A (en) * | 2021-08-24 | 2021-12-17 | 上海氢牧新能源科技有限公司 | Humidifying device and humidifying method for fuel cell part testing system |
| CN114023998A (en) * | 2021-11-04 | 2022-02-08 | 大连擎研科技有限公司 | Humidification system of fuel cell test bench |
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2022
- 2022-12-30 CN CN202211719884.7A patent/CN115863707B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101076910A (en) * | 2003-05-02 | 2007-11-21 | 张超迥 | Dew-point humididier and temperature control for corresponding gas |
| CN112490474A (en) * | 2020-11-26 | 2021-03-12 | 合肥科威尔电源系统股份有限公司 | Gas humidifying device of fuel cell system |
| CN112952150A (en) * | 2021-02-01 | 2021-06-11 | 佛山仙湖实验室 | Humidifier system for fuel cell engine and humidification method |
| CN113809364A (en) * | 2021-08-24 | 2021-12-17 | 上海氢牧新能源科技有限公司 | Humidifying device and humidifying method for fuel cell part testing system |
| CN114023998A (en) * | 2021-11-04 | 2022-02-08 | 大连擎研科技有限公司 | Humidification system of fuel cell test bench |
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