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VK2AAB > FUEL 14.01.10 09:33l 38 Lines 1643 Bytes #999 (0) @ WW
BID : 23724_VK2WI
Read: GUEST
Subj: Re: HydrogenBus trial
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Sent: 100114/0458Z @:VK2WI.#SYD.NSW.AUS.OC #:23724 [Sydney] $:23724_VK2WI
From: VK2AAB@VK2WI.#SYD.NSW.AUS.OC
To : FUEL@WW
Hello Bob,
Interested in the distribution of the hydrogen.
Warren was correct in what he said about the overall efficiency of the
system.
Natural gas is another source. However the gas is only a by product if
you have no other use for it. There would be problems if there were large
numbers of trucks and cars using hydrogen.
The main problem is not the fuel cells, but the ERoEI.
This pretty poor, and the energy needed to compress the gas is a real
killer for the hudrogen system.
http://www.energybulletin.net/node/11963
http://www.energybulletin.net/taxonomy/term/25?page=1
These are just a couple of articles, that set out the problems.
Of course hydrogen can be produced with electrolsys but that is even
worse if you just use the mains. Using alternative electricity is no
cheaper however.
Aside from the fuel cell life time problem, it falls down on the overall
efficiency, from well to wheels, or mine to wheels.
Do a search on the enegybulletin and there are several pages on hydrogen
systems for transport usage.
The was even a suggestion of hydrogen powered aircraft. Problem turned
out to be that the size and weight of the tank meant a very small number
of passengers in a 747 size aircraft.
If there aim is to reduce pollution in the street then hydrogen will work
for them but at the expense of energy efficiency.
You mentioned Ballard, they are if I remember a Canadian manufacturer of
fuel cells. If after all this time they have not got the lifetime up to
good levels then I think they will be overtaken by battery development.
73 Barry VK2AAB
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