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redsox5
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Homework Statement
I'm trying to calulate the efficency of a small hydrogen fuell cell that I built. I have all of the measurements, but I'm not coming up with a resonable effiency.
Homework Equations
[tex]\frac{P OUT}{P IN}[/tex]x 100
The power to electrolyze the water is the P IN.
3.25 W =2.5 V x .00021 Amps (.21 mA)
We measured the electrical power out finding the voltage and amperage.
P OUT = V x I
2.01 x 10^-4 W=.96 V x .00021 AMPS (.21 mA)
I caulcate the force to be 1.421 N
Then I take the electrical P Out and use it as the P IN for the car
the P IN for the car is the electrical P Out
and the P Out for the car is F x V
To find the % efficiency:
[tex]\frac{p Out of the Car}{P in Car}[/tex] x 100
The avg velocity is .0198 m/s
The Attempt at a Solution
I'm coming up with an unreasonable calculation