> > Ah, Keelynet, that brings back memories.
> 
> > Those memories tend to produce the same result, being ha ha 
> ha ha ha 
> > ha ha ha ha ha ha ha hah ah ah ah ha ha ha ah ahah cough 
> splutter ack 
> > ha ha ha ha ha ha breath ha ha ha ha ha ha ha ha ha ha ha 
> ha ha ha ha 
> > ha ha ha ha ha ha ha ha ha.
> >
> > You'd be lucky enough to produce enough hydrogen to run 
> your cigarette 
> > lighter, never mind a car.
> 
> Let me weigh in on the side of the junk science.
> *IF* the method allows efficient reaction of the Aluminum 
> wire with the water, and that is something I don't know, but 
> which others probably do, then the claims made on that page 
> seem modest.
> E&OE as ever, but a quick run through Excel suggests he 
> should get about 9 litres of Hydrogen per minute from total 
> reaction of 180 cm of 1.6mm dia Al wire.
> And that should have an energy content of about 1.7 kW.minute 
> ie produce a power of 1.7 kW for 1 minute at 100% efficient 
> conversion of the H2.
> 
> I may have dropped a few powers of 10 somewhere.
> I used an SG of 2 for Al. (2.6?)
> I used 36 kWh/kg as energy content of Hydrogen (about right).
> 
> (1.6/2)^2 x 3.14 /100*180 = 3.6 cc Al/min At 11% H2/Al by 
> mass and Sg Al = 2 = 0.8 gram H2.
> 0.8/1000 * 36 = 0.03 kWh
> .03 x 60 = 1.8 kW for one minute
> !
> .8g H2 = .4 Mol
> 22.4 x 0.4 =~ 9 litre/min H2 !


I'll take your word for it that those numbers are right, and add that
smelting aluminium ore takes around 15kWh per kilo, down to 12kWh in modern
plants (Wikipedia).

Making 3.6cc of Al takes 3.6 /1000 * 12kWh = 0.04 kWh.  (Electricity is
apparently 1/3 of the cost.)

We get 0.03kWh back.

Those numbers are by weight of course, by volume is far more exciting.
Possibly produces too much waste to be a decent battery.

Tony

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