Re: The door to the hydrogen economy may be made of cobalt
- From: John Beardmore <wookie@xxxxxxxxxxxxxxxxxx>
- Date: Sun, 10 Sep 2006 23:03:34 +0100
In message <qtt8g2pli6e4eh7jl5njf9am69ta0io2l7@xxxxxxx>, AJH <sylva@xxxxxxxxxxxxx> writes
On Sun, 10 Sep 2006 21:29:57 +0100, John Beardmore
<wookie@xxxxxxxxxxxxxxxxxx> wrote:
Of course the way they put the figures forward is designed to put the
casual looker off doing the maths
:)
Hence 6.4 litres consumed and approx 62kWhr(t) compressed into the
tank over 4 hours with a maximum power of 800W, that's 3.2kWhr(e).
So the worst case electrical energy needed to compress the fuel from a
domestic natural gas supply looks like <5.17% of the total energy in
the fuel, or given a 30% thermal to electricity at point of use
conversion, <17% of the energy is needed to compress it. Mind some of
that energy could be recovered as household heat.
Yes, though if the electricity comes from a remote gas fired power station...
The strange thing is the main gas grid runs at over 15atm I think so
it's more logical to tap it directly!
Doubt bringing that into 50% of domestic properties would be seen as a good idea though !
Cheers, J/.
--
John Beardmore
.
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