OPEM Report (Amphlett Model)

What is Amphlett ?

Amphlett static model is a parametric model that predicting the performance of a solid polymer electrolyte, proton exchange membrane (PEM) fuel cell. Main concepts in the Amphlett model includes Nernst voltage, PEMFC losses (activation polarization loss, ohmic polarization loss and concentration polarization loss), power and efficiency of fuel cell. This parametric model of PEMFC using a combination of mechanistic and empirical approach. The ideal standard potential (Nernst potential) of an H2/O2 FC is 1.229 V with liquid water product. The actual cell potential is decreased from its reference potential because of irreversible losses.


Input Description Value
A active area [cm^2] 50.6
B An empirical constant depending on the cell and its operation state (Tafel Slope) [V] 0.016
JMax maximum current density [A/(cm^2)] 1.5
N Number Of Single Cells 1
PH2 Partial Pressure [atm] 1
PO2 Partial Pressure [atm] 1
R R-Electronic [ohm] (*Optional) 0
T Cell Operation Temperature [K] 343.15
i-start Cell operating current start point [A] 0
i-step Cell operating current step 0.1
i-stop Cell operating current end point [A] 4
l Membrane Thickness [cm] 0.0178
lambda is an adjustable parameter with a min value of 14 and max value of 23 23

Overall Parameters

Parameter Description Value
Efficiency|Pmax Cell efficiency at maximum power 0.527106578889014
Pmax Maximum power [W] 3.2069164259607614
Ptotal(Elec) Total electrical power [W] 3.4513224121275345
Ptotal(Thermal) Total thermal power [W] 1.3046775878724657
VFC|Pmax Cell voltage at maximum power [V] 0.8222862630668619


Parameter Description Value
K Slope of the curve obtained by linear approximation [A^(-1)] -0.05583350147954085
Pmax(L-Approx) Maximum power obtained by linear approximation [W] 4.514326944217295
V0 Intercept of the curve obtained by linear approximation [V] 1.0040929839792478
VFC|Pmax(L-Approx) Cell voltage at maximum power obtained by linear approximation [V] 0.5020464919896239

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