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-   -   How to calculate the mass flow rate on PEMFC addon? (https://www.cfd-online.com/Forums/fluent/223048-how-calculate-mass-flow-rate-pemfc-addon.html)

Michael104 December 19, 2019 03:46
How to calculate the mass flow rate on PEMFC addon?
 
Hey everyone,



i try to simulate a PEM fuel cell with the pemfc addon (version 2019 R3). First i simulate a fuel cell with the pem tutorial and it works well. Now i changed the dimensions of the geometry (my model includes 1 channel for h2, o2, and 2 cooling channels). I think there is a problem with my inlet conditions, because i always recieve an error (floating point).

Does anyone knows how to calculate the inlet massflow rate for hydrogen and oxygen??



Thanks

ramakant January 11, 2020 06:48
Yes I know the equation ?

ramakant February 7, 2020 11:56
Quote:
Originally Posted by ramakant (Post 754358)
Yes I know the equation ?

U (inlet)=zeta *I/nF*A(MEM)/xi*RT/P*1/A(channel)
where zeta =stoichiometryratio (Anode and cathode)
n= 2(anode) ,4 (cathode)
xi=mass fraction (Oxygen and hydrogen)
R=8.314
T=353K
P=101325pA
A(MEM)=L*B(M2)
A(CHANNEL)=L*B(M2)

I HOPE THIS WILL WORK ?

sadsid December 11, 2023 01:38
Quote:
Originally Posted by ramakant (Post 757171)
U (inlet)=zeta *I/nF*A(MEM)/xi*RT/P*1/A(channel)
where zeta =stoichiometryratio (Anode and cathode)
n= 2(anode) ,4 (cathode)
xi=mass fraction (Oxygen and hydrogen)
R=8.314
T=353K
P=101325pA
A(MEM)=L*B(M2)
A(CHANNEL)=L*B(M2)

I HOPE THIS WILL WORK ?

could you please provide us the reference for the above formula?


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