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Hydrogen production from electrolysis model
Posted 24 févr. 2022, 09:52 UTC−5 Computational Fluid Dynamics (CFD), Battery Design 0 Replies
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Hello
I have been working on a PEM water electrolyser model. I have integrated the electrolyser module and Free and Porous media flow physics to the model. I would like to measure the amount of hydrogen generated in the model but i am unable to figure out where tho measure the amount.
the problem i am faced with is that different measurements across the model yield vastly different output for hydrogen generation.
At first i tried a surface integration of total H2 flux magnitude on the hydrogen channel outputs (far right side of the model in the picture). this yields me a relatively small result for the hydrogen generation amount. Second, i did another surface integraton over the membrane, which yields me a result about 7x larger than the first attempt. Then doing a third integration over the gas diffusion layer surface gives an even larger result.
Last, i found a global auxilliary variable for the free and porous media interface that evaluates the outward mass flow rate across feature selection. This yields me yet another differenet value for the amount of hydrogen produced.
Where would be the correct location to measure hydrogen generation in an electolysis model? and which method can i use to evaluate that
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Hello toivo saabas
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