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

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

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]

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

EfficiencyPmax

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

VFCPmax

Cell voltage at maximum power [V]

0.8222862630668619

Graphs
Parameter

Description

Value

K

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

0.05583350147954085

Pmax(LApprox)

Maximum power obtained by linear approximation [W]

4.514326944217295

V0

Intercept of the curve obtained by linear approximation [V]

1.0040929839792478

VFCPmax(LApprox)

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

0.5020464919896239

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