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PEMFC addon module problem

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Old   August 12, 2021, 13:25
Default PEMFC addon module problem
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Dongjin Yu
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Hi all, It is my first time to post on CFD online. Iíve got some problem with PEMFC simulation using ANSYS Fluent PEMFC addon module.

Iím doing various operating conditions such as operating pressure and inlet relative humidity. In the experimental results, higher operating pressure and inlet relative humidity can improve the PEMFC performance.

I finished validation with experimental data and grid dependency test. After that, decreased relative humidity from 100% to 50%. As a result, pemfc performance was increased. Thatís really weird.

Operating pressure is 2 atm. But when I change it to 1 atm, the result was reasonable (decreased performance of pemfc).

My question is ďshould I have to consider something else when I change operating pressure and why this weird results are appeared?Ē

Please answer my question.

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Old   August 16, 2021, 23:53
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Hi, I also use ANSYS FLUENT PEMFC addon module, but there is a big difference in current density with experimental data; for example, at V= 0.7 the current density is about 0.4 (A/cm2) but when I try PEMFC module it is 0.0006 (A/cm2). Could you help me to find what is wrong?
Thanks in advance.
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pemfc, performance, pressure

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