Hydrogen Energy

Power & Energy Engineering general discussion Alternative Energy
#1

SOURCE
https://www.eng-tips.com/viewthread.cfm?qid=148816
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QUESTION

Mechdod
hat is the specific energy for hydrogen and how can I calculate the mass of hydrogen required to produce electricity for a day at 90% effficiiency?

REPLIES

kenvlach
To produce one electron (e-) per day in a 90% efficient fuel cell via the overall reaction

0.5 H2 + 0.25 O2 --> 0.5 H2O + e-

requires 1.111… molecule of H2 per day, or 3.7 x 10-24 grams/day.

Multiply if your electrical needs are greater.

#2

From the BBC:

Dik

1 Like
#3

Electron flow is equivalent to current. I am sure the OP wants to use the electricity as energy.