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Fuel Cell Modelling

Fuel Cell Modelling. NPRE 498 ES. V-I equation. v = E thermo -r]act -r]ohmic -r]conc where v = operating voltage of fuel cell Ethermo = thermodynamically predicted voltage of fuel cell r1act = activation losses due to reaction kinetics

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Fuel Cell Modelling

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  1. Fuel Cell Modelling NPRE 498 ES

  2. V-I equation • v = Ethermo -r]act -r]ohmic -r]conc • where • v = operating voltage of fuel cell • Ethermo = thermodynamically predicted voltage of fuel cell • r1act = activation losses due to reaction kinetics • r10hmic = ohmic losses from ionic and electronic resistance • r1conc = concentration losses due to mass transport • V = Etherrno -(aA +bAIn j) -(ae +be In j) -(j ASRohmic) -(c Injl/(jl-j)

  3. terms • where • r1act = (aA +bA In j) +(ae +be In j): activation losses from both anode (A) and the cathode (C) based on natural logarithm form of the Tafel Equation • r10hmic = j ASRohmic: ohmic resistance loss based on current density and ASR • r1conc = C InjL/ (jL -j)]: combined fuel cell concentration loss, where c is an empirical constant

  4. Sketch of VI curve components

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