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Application Of Hydrogen Gas Detector in H2 Leakage Detection

2021-6-28      View:

Hydrogen (H2) gas  environment

Hydrogen energy is recognized as clean energy and is becoming a low-carbon and zero-carbon energy. Hydrogen fuel cell (HFC) is a power generation device that converts the chemical energy of hydrogen and oxygen into electrical energy directly. Its basic principle is the reverse reaction of electrolyzing water. Hydrogen and oxygen are supplied to the anode and cathode respectively. After hydrogen diffuses outward through the anode and reacts with the electrolyte, the electrons emitted reach the cathode through the external load.

Hydrogen fuel cell has three advantages

First, no pollution. The hydrogen fuel cell does not pollute the environment. It is the most typical traditional backup power solution through electrochemical reaction rather than combustion (steam, diesel) or energy storage (battery). Traditional battery combustion will release pollutants, such as Cox, NOx, Sox gas and dust. As mentioned above, hydrogen fuel cells produce only water and heat. If hydrogen is generated by renewable energy (photovoltaic panels, wind power generation, etc.), the whole cycle will not produce harmful substances.

Secondly, there is no noise. The hydrogen fuel cell runs quietly, and the noise is only 55dB, which is equivalent to the conversation level of normal people. This makes the fuel cell suitable for indoor installation or outdoor noise-limited places.

Third, high efficiency. The power generation efficiency of the hydrogen fuel cells can reach more than 50%. It depends on the conversion characteristics of the fuel cell. Chemical energy is directly converted into electrical energy without intermediate conversion between thermal energy and mechanical energy (generator).

Due to these advantages of the hydrogen fuel cell, Boeing successfully tested a small aircraft powered by hydrogen fuel cell on April 3, 2008. Boeing claims that this is the first time in the history of world aviation, which shows that the aviation industry will become more powerful and environmentally friendly in the future. The aircraft uses hydrogen fuel cell with higher performance and efficiency, which proves the application potential of hydrogen fuel cell technology. The fuel system uses hydrogen as the fuel, which is directly converted into electric energy and electrochemically reacts with oxygen in the air without combustion. The only by-product is water. If renewable energy is used to produce hydrogen fuel, the aircraft engine is completely free of carbon dioxide.

However, in the production and application of hydrogen fuel cells, there may be a certain risk of H2 leakage. H2 leakage will lead to the performance degradation of fuel cells, and H2 is a flammable gas, too much accumulation will cause great hidden safety hazards. Therefore, it is necessary to detect the content of hydrogen, and the use of hydrogen detector is inevitable.

Hydrogen gas detector reacts quickly and accurately to toxic gas to ensure that it can alarm in time when harm occurs. It is the most sensitive and alarming detector in today's industrial field. Its design can adapt to these extremely harsh working environments. It mainly includes the following two commonly used hydrogen gas detectors:

multi gas detector 009

Portable hydrogen detector. Portable hydrogen leak detector can detect the concentration of hydrogen in the working environment. It adopts imported electrochemical sensor, which has excellent sensitivity and repeatability; The hydrogen detector adopts embedded micro control technology, with simple menu operation, complete functions and high accuracy.

fixed gas detector 010

Fixed hydrogen detector. The fixed hydrogen detector adopts a built-in suction pump to continuously detect the hydrogen concentration in the working environment. The fixed hydrogen detector adopts an imported electrochemical sensor, with very clear large liquid crystal display, sound and light alarm prompt. With the control system, it can remotely monitor the condition of 64-bit equipment at most at the same time, so as to ensure that it can detect dangerous gas in very unfavorable working environment and prompt the operator to prevent it in time.