Pieter Koole wrote:
> Hi,
> I allready make ethanol ( well, I don't but the yeast does ).
> I intend to use it for making BD
>
> I'm interested in making H2 out of water as a way of storing surplus
> solar
> energy, or perhaps drive a petrol car on it. In Holland ( probably
> also in
> US ) we have many cars driving on LPG ( liquified petroleum gas ),
> wich
> maybe also can drive on H2.
With enough money, any internal combustion engine can be modified to run
hydrogen. The bigger question is: "How much money will it take?"
If you are considering electrolysis, please understand that at 100%
efficiency, 8.3 kilowatt hours of electrical power will be used in
generating the energy equivalent of 1 liter of gasoline. Most
commercial electrolyzers operate at efficiencies considerably lower than
this, but you will not be able to buy one. As for home made models, no
electrolyzer I've ever built does better than about 25% efficiency, and
I've been investigating hydrogen for MANY years. That means a home made
electrolyzer will require something like 33 kWh to produce the energy
equivalent in 1 liter of gasoline. (At current electrical rates in
British Columbia, this would cost $2.16 per liter equivalent, BEFORE
compressing the gas!)
Surplus solar electricity is simply too valuable for this kind of
waste. Unless you are very rich, or happen to own property with a BIG
creek and more power from a hydro system than you know what to do with,
(I am aware of only one such situation here in British Columbia, where
high head streams are more common than many other places of the world.)
the energy required to produce hydrogen by electrolysis is too
expensive.
Propane fuel delivery systems can be modified to deliver hydrogen,
but I've never tried and wouldn't recommend messing with pressure tanks
unless you're fully qualified to do so. A propane tank will typically
hold less than 10% of what the high pressure natural gas tanks will
hold, so using propane tanks for hydrogen will deliver very little
range.
In many ways ethanol is a BETTER fuel than hydrogen. If there are
no legal hurdles to overcome, ethanol is easier to do and a LOT less
expensive.
robert luis rabello
"The Edge of Justice"
Adventure for Your Mind
http://www.1stbooks.com/bookview/9782
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