CN114202896A - Safety management method for wind tunnel type fuel cell environmental test cabin - Google Patents
Safety management method for wind tunnel type fuel cell environmental test cabin Download PDFInfo
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- CN114202896A CN114202896A CN202111341993.5A CN202111341993A CN114202896A CN 114202896 A CN114202896 A CN 114202896A CN 202111341993 A CN202111341993 A CN 202111341993A CN 114202896 A CN114202896 A CN 114202896A
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- fuel cell
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
- G01N33/005—Specially adapted to detect a particular component for H2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital
- G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital using a threshold to release an alarm or displaying means
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
Abstract
The invention discloses a safety management method for a wind tunnel type fuel cell environment test chamber, which comprises the following steps that a chamber body of the wind tunnel type fuel cell environment test chamber is internally provided with a plurality of sensors and actuating mechanisms; the plurality of sensors includes a hydrogen concentration sensor; the safety management method comprises the following steps: dividing the internal state into a plurality of stages according to the numerical value of the hydrogen concentration in the cabin body in advance; measuring the hydrogen concentration in the cabin body through a hydrogen concentration sensor in the cabin body; judging which level of the current cabin state belongs to according to the hydrogen concentration obtained by current measurement; and adopting a disposal strategy corresponding to the current event grade according to the judged event grade. The safety management method for the wind tunnel type fuel cell environmental test cabin has the advantages of avoiding hydrogen accumulation in the cabin, providing a safe operation environment for a fuel cell system and the like.
Description
Technical Field
The invention relates to a hydrogen fuel cell testing technology, in particular to a safety management method for a wind tunnel type fuel cell environmental test chamber.
Background
With the increasing severity of energy crisis and environmental pollution problems, new energy vehicles have gained rapid development opportunities. A hydrogen fuel cell is a power generation device that directly converts chemical energy of hydrogen and oxygen into electrical energy. The basic principle is the reverse reaction of electrolyzed water, hydrogen and oxygen are supplied to the anode and cathode respectively, and after the hydrogen diffuses out through the anode and reacts with the electrolyte, electrons are released to reach the cathode through an external load. The hydrogen fuel cell automobile is a zero-emission and zero-pollution automobile in the true sense, and the hydrogen fuel is a perfect automobile energy source. The hydrogen fuel cell automobile is used as an ultimate clean energy source, has unique technical and environmental protection advantages in the application aspect of trucks and large passenger vehicles, and is one of the main directions for the development of new energy automobiles in the future.
The test chamber of the hydrogen fuel cell power generation system (hereinafter referred to as the system) is restricted by the prior art due to the factors of high hydrogen-related safety requirement, complex working condition and the like. The safety system of the common environmental test chamber used conventionally at present can not meet the testing requirements of the fuel cell and can not support the safe and reliable operation of the fuel cell system.
The current universal environmental test chamber has the following disadvantages.
1. The traditional environment test chamber safety disposal strategy mostly adopts a gas explosion-proof disposal method, the physical characteristics of a hydrogen system cannot be considered, and the sensor information acquisition cannot reflect the hydrogen distribution state in the chamber.
2. Traditional environmental test chambers focus on qualitative handling in terms of safety, and ignore quantitative handling.
3. The traditional environmental test chamber is based on a simple coping strategy in a disposal strategy, and false alarm or disposal is easily caused.
4. The traditional environmental test chamber is dispersedly controlled on a safety disposal strategy, and an effective safety system cannot be formed.
5. Traditional test chambers lack specialized safety judgment and disposal strategies, resulting in equipment that is always operating at high risk between false alarms and distress symptoms.
Therefore, a safety management method for a wind tunnel type fuel cell environmental test chamber is needed, a plurality of sampling points of hydrogen sensors are distributed and arranged in a three-dimensional manner in a chamber body and an air channel of the wind tunnel type fuel cell environmental test chamber, and an alarm system, a loading control end, a hydrogen supply valve, an electric door lock, a forced exhaust fan, a nitrogen system, a fire extinguishing system and the like are combined, a controller calculates, analyzes and evaluates according to sampling results, externally issues alarm signals, and automatically performs actions of unloading, stopping, power-off, hydrogen supply cutting, chamber door locking, forced exhaust opening, air replacement in the chamber, nitrogen conversion, fire extinguishing gas injection and the like, so that hydrogen accumulation in the chamber is avoided, and a safe operation environment is provided for a fuel cell system.
Disclosure of Invention
The invention provides a safety management method for a wind tunnel type fuel cell environmental test chamber to avoid hydrogen accumulation in the chamber and provide a safe operation environment for a fuel cell system, aiming at avoiding the defects in the prior art.
The invention adopts the following technical scheme to solve the technical problem.
A safety management method for a wind tunnel type fuel cell environmental test chamber is characterized in that a chamber body of the wind tunnel type fuel cell environmental test chamber is internally provided with a plurality of sensors and actuating mechanisms; the plurality of sensors includes a hydrogen concentration sensor;
the safety management method comprises the following steps:
step 1: dividing the internal state into a plurality of stages according to the numerical value of the hydrogen concentration in the cabin body in advance;
step 2: measuring the hydrogen concentration in the cabin body through a hydrogen concentration sensor in the cabin body;
and step 3: judging which level of the current cabin state belongs to according to the hydrogen concentration obtained by current measurement;
and 4, step 4: and adopting a disposal strategy corresponding to the current event grade according to the judged event grade.
The safety management method for the wind tunnel type fuel cell environmental test chamber is also characterized in that:
further, the various sensors include hydrogen sensors, infrared and video sensors, smoke sensors.
Further, the hydrogen concentration sensor includes a hydrogen pooling sensor, a hydrogen diffusion sensor, and a hydrogen leakage sensor.
Further, the multi-level events include conventional events, first-level events, second-level events, and third-level events.
Further, in the conventional state of affairs operation state, the test concentration of the hydrogen collecting sensor reaches 20pp and is less than 50ppm, the hydrogen diffusion sensor has no early warning, and the hydrogen leakage sensor has no early warning.
Further, the first-level event refers to that the test concentration of the hydrogen convergence sensor reaches 50pp and is less than 300ppm in the running state, the hydrogen diffusion sensor gives an early warning, and the hydrogen leakage sensor gives an early warning.
Further, the second-level event refers to that the test concentration of the hydrogen collecting sensor reaches 300pp and is less than 500ppm in the running state, the hydrogen diffusion sensor gives an early warning, and the hydrogen leakage sensor gives an early warning.
Further, the third-level state refers to that in the running state, the test concentration of the hydrogen collecting sensor reaches more than 500ppm, the hydrogen diffusion sensor gives an early warning, the leakage sensor gives an early warning, or the smoke sensor gives an early warning, the infrared/flame sensor gives an early warning, and the video sensor finds that the gas pipeline falls off and bursts.
Further, the wind tunnel type fuel cell environmental test chamber is positioned on a test bench which is positioned in a laboratory.
Further, the safety management method for the wind tunnel type fuel cell environmental test chamber further comprises three-level linkage event response; the three-stage linkage event response is three-linkage of a wind tunnel type fuel cell environment test cabin, a test board and a laboratory.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a safety management method for a wind tunnel type fuel cell environmental test chamber, which adopts a grading situation and a control strategy. A cabin body of the wind tunnel type fuel cell environment test cabin is internally provided with a plurality of sensors and an actuating mechanism; the plurality of sensors includes a hydrogen concentration sensor; the safety management method comprises the following steps: dividing the internal state into a plurality of stages according to the numerical value of the hydrogen concentration in the cabin body in advance; measuring the hydrogen concentration in the cabin body through a hydrogen concentration sensor in the cabin body; judging which level of the current cabin state belongs to according to the hydrogen concentration obtained by current measurement; and adopting a disposal strategy corresponding to the current event grade according to the judged event grade.
The system comprises a hydrogen sensor, an infrared and video sensor and a smoke sensor, wherein the signals of the sensors are distributed and arranged in a three-dimensional manner in a cabin body and an air channel of a fuel cell environment test cabin, are output through calculation control of a controller, and then corresponding disposal actions are executed by an executing mechanism comprising an alarm system, a loading control end, a hydrogen supply valve, an electric door lock, a forced exhaust fan, nitrogen conversion, fire extinguishing agent injection and the like, so that a safe operating environment is provided for a fuel cell system.
The safety management method for the wind tunnel type fuel cell environmental test cabin has the advantages of avoiding hydrogen accumulation in the cabin, providing a safe operation environment for a fuel cell system and the like.
Drawings
Fig. 1 is a control block diagram of a safety management method for a wind tunnel type fuel cell environmental test chamber according to the present invention.
The present invention will be further described with reference to the following detailed description and accompanying drawings.
Detailed Description
Referring to fig. 1, in the safety management method for the wind tunnel type fuel cell environmental test chamber of the present invention, a chamber body of the wind tunnel type fuel cell environmental test chamber is provided with a plurality of sensors and an execution mechanism; the plurality of sensors includes a hydrogen concentration sensor;
the safety management method comprises the following steps:
step 1: dividing the internal state into a plurality of stages according to the numerical value of the hydrogen concentration in the cabin body in advance;
step 2: measuring the hydrogen concentration in the cabin body through a hydrogen concentration sensor in the cabin body;
and step 3: judging which level of the current cabin state belongs to according to the hydrogen concentration obtained by current measurement;
and 4, step 4: and adopting a disposal strategy corresponding to the current event grade according to the judged event grade.
In one embodiment, the plurality of sensors includes hydrogen sensors, infrared and video sensors, smoke sensors.
In one embodiment, the hydrogen concentration sensor includes a hydrogen pooling sensor, a hydrogen diffusion sensor, and a hydrogen leakage sensor.
According to the action and distribution sampling position of the hydrogen concentration sensor, the hydrogen concentration sensor is divided into a hydrogen collecting sensor, a hydrogen diffusion sensor and a hydrogen leakage sensor.
In one embodiment, the multi-level events include a regular event, a primary event, a secondary event, and a tertiary event.
In one embodiment, the normal state refers to that the test concentration of the hydrogen convergence sensor reaches 20pp and is less than 50ppm, the hydrogen diffusion sensor has no early warning, and the hydrogen leakage sensor has no early warning in the operating state.
In the operating state, the conventional disposal strategy is to turn on the hydrogen exhaust fan and manually check the hydrogen exhaust fan.
In one embodiment, the first-level event refers to that hydrogen continues to rise after the hydrogen exhaust fan is started in the operating state, the test concentration of the hydrogen collection sensor reaches 50pp and is less than 300ppm, the hydrogen diffusion sensor gives an early warning, and the hydrogen leakage sensor gives an early warning.
In the running state, the disposal strategy of the first-level event: and sending a digital early warning signal, sending an audible and visual alarm signal, unloading the test system, starting the hydrogen exhaust fan, and manually checking.
In one embodiment, the second-level event refers to that the test concentration of the hydrogen convergence sensor reaches 300pp and is less than 500ppm, the hydrogen diffusion sensor gives an early warning, and the hydrogen leakage sensor gives an early warning in the operating state.
In the running state, the treatment strategy of the secondary event: sending a digital alarm signal and an audible and visual alarm signal; prompting irrelevant people to evacuate urgently; and (4) stopping the test system, closing the hydrogen supply valve, cutting off the power supply in the cabin, closing the cabin door, injecting nitrogen and starting the forced draught fan.
In one embodiment, the three-level event refers to that in an operating state, the hydrogen convergence sensor gives an early warning to the hydrogen diffusion sensor when the test concentration reaches above 500ppm, the leakage sensor gives an early warning, or the smoke sensor gives an early warning, the infrared/flame sensor gives an early warning, and the video sensor finds that the gas pipeline falls off or bursts.
In the running state, the disposal strategy of the three-level events is as follows: sending a digital alarm signal and an audible and visual alarm signal; prompting all people to evacuate urgently; the hydrogen supply valve is automatically closed, the power supply in the cabin is automatically cut off, the cabin door is automatically locked, fire extinguishing gas is injected, the forced draught fan is started, and the explosion venting valve is opened.
In one embodiment, the wind tunnel fuel cell environmental test chamber is located on a test stand located in a laboratory.
In one embodiment, the safety management method for the wind tunnel type fuel cell environmental test chamber further comprises three-stage linkage event response; the three-stage linkage event response is three-linkage of a wind tunnel type fuel cell environment test cabin, a test board and a laboratory.
The three-level linkage event response comprises a first-level response, a second-level response and a third-level response.
The first-level response is cabin level, the disposal strategy is mainly based on the cabin, and meanwhile, an alarm signal is sent to the test bench and the laboratory; the test rig is moved as an unload for manual inspection.
The second-stage response is formed by the linkage of the cabin and the test bench and the linkage of the laboratory safety system, the test bench is matched with the cut-off of the hydrogen supply valve according to a fault signal sent by the cabin, the system is stopped, and the laboratory safety system injects nitrogen.
The three-level response is formed by the linkage of the cabin, the test bench and the laboratory safety system, the test bench cuts off the hydrogen supply valve according to a fault signal sent by the cabin, the emergency stop is carried out, the power supply is cut off, and the laboratory safety system prompts personnel to evacuate and inject fire extinguishing gas.
The three-level linkage event response is deeply integrated with a laboratory safety management system, and linkage improvement of the test cabin, the bench and the laboratory is expanded to be combined with laboratory regulation formulation, personnel responsibility division and emergency drilling, so that the overall safety management level is improved.
The safety management method for the wind tunnel type fuel cell environment test chamber collects various sensor signals which are distributed and arranged in three dimensions in the chamber body and the air duct of the wind tunnel type fuel cell environment test chamber. The multiple sensors comprise a hydrogen sensor, an infrared sensor, a video sensor and a smoke sensor, the output is calculated and controlled by a PLC (programmable logic controller), and corresponding processing actions including alarming, loading control end, opening and closing hydrogen supply valve, opening and closing electric door lock, opening and closing forced exhaust fan, nitrogen conversion, fire extinguishing agent injection and the like are executed by an executing mechanism, so that a safe operation environment is provided for the fuel cell system.
Actuators include, but are not limited to: a digital signal alarm device, an audible and visual alarm device, a cabin door lock, a measurement and control system, a hydrogen valve, a hydrogen exhaust fan, a forced exhaust fan, a nitrogen system, an explosion relief valve, a fire extinguishing system and the like.
And the sampling ports of the hydrogen collection sensor are positioned on the cabin top and the outlet of the hydrogen separator and are used for collecting the hydrogen collection state in the cabin. The method is used for detecting the change of local hydrogen concentration caused by the reasons of installation, disassembly, pipeline falling, burst, system microleakage accumulation and the like. The hydrogen sequestration sensor threshold is 0-1000ppm with an accuracy of 1.5 ppm.
And a sampling port of the hydrogen diffusion sensor is positioned right above the tested sample or in the outer circulation air duct at a distance of one meter below the tested sample, and is used for testing the hydrogen diffusion concentration in the cabin. And detecting the change of the hydrogen concentration caused by micro leakage and leakage of the sample. The hydrogen diffusion sensor threshold is: 0-1000ppm, precision 1.5 ppm.
A sampling port of the hydrogen leakage sensor is positioned at the key position of the tested sample or near a lower air port, and the leakage state of the tested sample is tested; and detecting the change of the hydrogen concentration of the key position of the sample piece caused by the fault, damage, falling off and the like of the sample piece. The threshold value of the hydrogen leakage sensor is between 2 times and 4 times of the normal micro leakage of the tested sample,
The fire sensor is arranged in the cabin body, comprises a video sensor, an infrared/flame sensor and a smoke sensor and is used for detecting fire information in the cabin body.
The video sensor is arranged on the top of the cabin, records and monitors real-time pictures in the cabin, and manually or automatically monitors the displacement and change in the cabin.
The infrared/flame sensor is characterized in that the infrared/flame sensor is arranged at four vertex angles in the cabin for comparison, detects the fire information of electrical appliances/hydrogen in the cabin and provides an automatic alarm signal.
The smoke sensor is characterized in that the smoke sensor is positioned at the top in the detection cabin and is used for detecting the fire hidden trouble of an electric appliance in the detection cabin.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A safety management method for a wind tunnel type fuel cell environmental test chamber is characterized in that a chamber body of the wind tunnel type fuel cell environmental test chamber is internally provided with a plurality of sensors and actuating mechanisms; the plurality of sensors includes a hydrogen concentration sensor;
the safety management method comprises the following steps:
step 1: dividing the internal state into a plurality of stages according to the numerical value of the hydrogen concentration in the cabin body in advance;
step 2: measuring the hydrogen concentration in the cabin body through a hydrogen concentration sensor in the cabin body;
and step 3: judging which level of the current cabin state belongs to according to the hydrogen concentration obtained by current measurement;
and 4, step 4: and adopting a disposal strategy corresponding to the current event grade according to the judged event grade.
2. The safety management method for the environmental test chamber of the wind tunnel type fuel cell as claimed in claim 1, wherein the plurality of sensors comprise a hydrogen sensor, an infrared and video sensor and a smoke sensor.
3. The safety management method for the environmental test chamber of the wind tunnel type fuel cell as claimed in claim 2, wherein the hydrogen concentration sensor comprises a hydrogen collection sensor, a hydrogen diffusion sensor and a hydrogen leakage sensor.
4. The safety management method for the environmental test chamber of the wind tunnel type fuel cell as claimed in claim 3, wherein the multiple-level events include a normal event, a primary event, a secondary event and a tertiary event.
5. The safety management method for the wind tunnel type fuel cell environmental test chamber according to claim 4, wherein the conventional situation refers to that in a test state, a hydrogen collection sensor has leakage but does not exceed 50ppm, a hydrogen diffusion sensor has no early warning, and a hydrogen leakage sensor has no early warning; and (4) opening fresh air to increase the fresh air quantity and diluting the hydrogen concentration in the cabin to be below 20 ppm. The leakage amount exceeds 20ppm, the hydrogen pipeline needs to be reinstalled by suspending the test, and the leakage point is controlled to be less than 10ppm after maintenance.
6. The safety management method for the environmental test chamber of the wind tunnel type fuel cell as claimed in claim 4, wherein the primary situation refers to a situation that hydrogen continues to rise to 50-300 degrees after a hydrogen exhaust fan is started in a test state, a hydrogen diffusion sensor gives an early warning, and a leakage sensor gives an early warning.
7. The safety management method for the environmental test chamber of the wind tunnel type fuel cell as claimed in claim 4, wherein the second-level situation refers to a situation in which the test concentration of the hydrogen collecting sensor reaches 300pp and is less than 500ppm, the hydrogen diffusion sensor gives an early warning, and the hydrogen leakage sensor gives an early warning in an operating state.
8. The safety management method for the environmental test chamber of the wind tunnel type fuel cell as claimed in claim 4, wherein the three-level situation refers to that in the operating state, the hydrogen convergence sensor gives an early warning to the hydrogen diffusion sensor with a test concentration of 500ppm or more, the leakage sensor gives an early warning to the hydrogen diffusion sensor, or the smoke sensor gives an early warning to the smoke sensor, the infrared/flame sensor gives an early warning to the smoke sensor, and the video sensor finds that the gas pipe falls off or bursts.
9. The safety management method for the wind tunnel type fuel cell environmental test chamber as recited in claim 1, wherein the wind tunnel type fuel cell environmental test chamber is located on a test table, and the test table is located in a laboratory.
10. The safety management method for the wind tunnel type fuel cell environmental test chamber according to claim 9, further comprising three-stage linkage event response; the three-stage linkage event response is three-linkage of a wind tunnel type fuel cell environment test cabin, a test board and a laboratory.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111341993.5A CN114202896A (en) | 2021-11-12 | 2021-11-12 | Safety management method for wind tunnel type fuel cell environmental test cabin |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111341993.5A CN114202896A (en) | 2021-11-12 | 2021-11-12 | Safety management method for wind tunnel type fuel cell environmental test cabin |
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| CN112290062A (en) * | 2020-10-10 | 2021-01-29 | 上海捷氢科技有限公司 | Hydrogen safety test system of fuel cell automobile |
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2021
- 2021-11-12 CN CN202111341993.5A patent/CN114202896A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060185979A1 (en) * | 2004-02-19 | 2006-08-24 | Tsuyoshi Suda | Hydrogen gas sensor |
| CN110174877A (en) * | 2019-04-28 | 2019-08-27 | 武汉泰歌氢能汽车有限公司 | A kind of fuel cell relates to the safety management system in hydrogen laboratory |
| CN110335438A (en) * | 2019-06-20 | 2019-10-15 | 武汉理工大学 | A kind of hydrogen fuel cell safety of ship protection system and guard method |
| CN112290062A (en) * | 2020-10-10 | 2021-01-29 | 上海捷氢科技有限公司 | Hydrogen safety test system of fuel cell automobile |
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