Hydrogen Concentration Measurement in a Flow using the Thermoconductivity Sensors

Abstract

The current trends in power development consider hydrogen as a promising power carrier. However, despite its potential, serious safety concerns remain, particularly in the presence of leaks. The paper substantiates a method for measuring hydrogen concentration in the hydrogen-air mixture flow using an assembly that consists of two thermoconductivity sensors. Introduction of the "open" sensor positioned along the flow and the "closed" sensor with a permeable mesh in a single assembly makes it possible to obtain a set of parameters for computing the mixture flow rate and the hydrogen concentration. The paper presents design of the measuring assemblies and provides results of the calibration experiments over an absolute pressure range of 0 to 5 atm, flow velocity of 0 to 1.84 m/s, and hydrogen concentration of 0 to 100 % (vol.). Experimental results demonstrate that using readings from the two thermoconductivity sensors and the pressure sensor makes it possible to unambiguously determine values of the hydrogen flow rate and concentration in the air-hydrogen mixture at the sensors' position. Such assemblies could be applied both for the laboratory purposes and in detecting gas mixture leaks in the emergencies

The work was financially supported by the Russian Science Foundation (grant no. 23-29-00267)

Please cite this article in English as:

Bocharnikov V.M., Volodin V.V., Golub V.V., et al. Hydrogen concentration measurement in a flow using the thermoconductivity sensors. Herald of the Bauman Moscow State Technical University, Series Natural Sciences, 2025, no. 5 (122), pp. 55--71 (in Russ.). EDN: UIQXRE

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