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.
Inputs
Input

Description

Value

A

Active area [cm^2]

50.6

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

RElectronic [ohm] (*Optional)

0

T

Cell operation temperature [K]

343.15

istart

Cell operating current start point [A]

0

istep

Cell operating current step

0.1

istop

Cell operating current end point [A]

75

l

Membrane thickness [cm]

0.0178

lambda

An adjustable parameter with a min value of 14 and max value of 23

23

Overall Parameters
Parameter

Description

Value

EfficiencyPmax

Cell efficiency at maximum power

0.2825484954669381

Pmax

Maximum power [W]

29.399736050325846

Ptotal(Elec)

Total electrical power [W]

45.01193996081915

Ptotal(Thermal)

Total thermal power [W]

47.074060039180836

VFCPmax

Cell voltage at maximum power [V]

0.44077565292842347

Graphs
Parameter

Description

Value

K

Slope of the curve obtained by linear approximation [A^(1)]

0.005863884375694599

Pmax(LApprox)

Maximum power obtained by linear approximation [W]

28.735604176281242

V0

Intercept of the curve obtained by linear approximation [V]

0.8209805365669519

VFCPmax(LApprox)

Cell voltage at maximum power obtained by linear approximation [V]

0.41049026828347596

Generated By OPEM Version 1.2