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how to calculate the average current density of fuel cell

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Old   April 28, 2017, 02:05
Default how to calculate the average current density of fuel cell
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ramakant gadhewal
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Dear All

I want to calculate the average current density from the given data.To calculate the inlet mass flow rate ( anode and cathode) kg/s for PEM fuel cell.

Thank you

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Ramakant Gadhewal
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Old   April 29, 2017, 14:49
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You can use the Faraday law of electrolysis to convert the current density into mass flow rate directly.


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Old   May 1, 2017, 02:49
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Quote:
Originally Posted by P.Charoen-amornkitt View Post
You can use the Faraday law of electrolysis to convert the current density into mass flow rate directly.


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Thank you ,Can you give me example to to current density to mass flow rate.
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Old   May 4, 2017, 05:39
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https://en.m.wikipedia.org/wiki/Fara...f_electrolysis

You can find how much mass is consumed using this relation. The amount of mass consumed depends on the current density. You can see from the data that the current density cannot reach 1.3-1.4 A/cm^2. So, maybe you can just pick that current density and substitute it into the equation.

However, this method is not a good way to calculate for the mass flow rate since the high current density region was also affected by water that prevents the mass to reach the reaction site.

In this case, the volume flow rate or the mass flow rate for the experiment should have been given in the paper. You should start from there.


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Old   May 4, 2017, 07:06
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Quote:
Originally Posted by P.Charoen-amornkitt View Post
https://en.m.wikipedia.org/wiki/Fara...f_electrolysis

You can find how much mass is consumed using this relation. The amount of mass consumed depends on the current density. You can see from the data that the current density cannot reach 1.3-1.4 A/cm^2. So, maybe you can just pick that current density and substitute it into the equation.

However, this method is not a good way to calculate for the mass flow rate since the high current density region was also affected by water that prevents the mass to reach the reaction site.

In this case, the volume flow rate or the mass flow rate for the experiment should have been given in the paper. You should start from there.


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Dear Amornkitt
You are saying that I should take the current density (A/cm2) more than 1A(ie.1.35 A/cm2).

Thank you
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