How much water does a H2/O2 fuel cell produce?

Question

How would this be determined?

What variables affect the volume of water produced per watt/kilowatt?

If a cell is loaded heavily, does it produce more/less/same amount of water per watt than if it is lightly loaded?

Answer 1

1. The PEM fuel cell works by migrating the protons through a membrane. So, for each H2O molecule, you get 2 electrons. Use molar weights to determine amount of water. Power = E * I, where I is coulomb per second. Look up number of electrons per coul to calculate.

2. The efficiency. This is a function of voltage drops and unreacted fuel, see article.

3. Less.

Answer 2

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