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Dear all,
I have a question about the H2 electrolyzer model Type160. Shortly: Will the Faraday loss of the electrolyzer be converted into heat in the electrolyzer?
In the electrolyzer model (Type 160 written by Ulleberg) [1], there are three efficiencies: eta_e, eta_F, and eta_tot: “eta_e” is the energy efficiency of electrolyzer without considering any Faraday loss, i.e. the maximum theoretical proportion of the electricity which can be covered to the hydrogen energy content. “eta_F” is the Faraday efficiency: it is the ratio of the real final produced H2 energy content to the theoretical maximum produced H2 energy content. “eta_tot” is the total efficiency of the electrolyzer: it is equal to “eta_e*eta_F”, and thus is the ratio of the final produced H2 energy content to the electricity consumed in the electrolyzer.
In Ullerberg’s model [1] (TRNSYS Type 160),
the heating generated by the electrolyzer is calculated by the P_ely*(1-eta_e),
which hasn’t taken the Faraday loss into account. However, according to the
energy balance, the Faraday loss must be somewhere, which mostly in the form of
heat, so I doubt why the Faraday loss hasn’t been taken into account in the
thermal part of the electrolyzer model.
Reference [1]: Øystein Ulleberg, Modeling of advanced alkaline electrolyzers: a system simulation approach, International Journal of Hydrogen Energy, Volume 28, Issue 1, January 2003, Pages 21-33. http://www.sciencedirect.com/science/article/pii/S0360319902000332#
Thank you very much.
Kind Regards, Sunliang Cao
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