Re: Efficienct? electrolysis.


"Tom" <Nospam@xxxxxxxxx> wrote in message
news:4806b6b3$0$30201$4c368faf@xxxxxxxxxxxxxxxxx
Was is the max efficiency and what process? Exluding the Crackpot
Stan Meyer.


Wikipedia has some info but you may need to look at the references...

http://en.wikipedia.org/wiki/Electrolysis
The energy efficiency of water electrolysis varies widely. The efficiency is
a measure of what fraction of electrical energy used is actually contained
within the hydrogen. Some of the electrical energy is converted to heat, a
useless by-product. Some reports quote efficiencies between 50% and 70%[1]
This efficiency is based on the Lower Heating Value of Hydrogen. The Lower
Heating Value of Hydrogen is thermal energy released when Hydrogen is
combusted. This does not represent the total amount of energy within the
Hydrogen, hence the efficiency is lower than a more strict definition. Other
reports quote the theoretical maximum efficiency of electrolysis as being
between 80% and 94%.[2]. The theoretical maximum considers the total amount
of energy absorbed by both the hydrogen and oxygen. These values refer only
to the efficiency of converting electrical energy into hydrogen's chemical
energy. The energy lost in generating the electricity is not included. For
instance, when considering a power plant that converts the heat of nuclear
reactions into hydrogen via electrolysis, the total efficiency is more like
25%?40%.[3]


.

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