On 30/09/17 09:35, Steve H wrote:
Tim Streater wrote:

In article , Steve H
wrote:

Hydrogen seems sensible - you can make it on site (yes, you need a big
electric cable - but so does a forecourt of charging stations) - you can
fill a lightweight kevlar / carbon tank in minutes and get 500 miles of
driving with only water / steam as the tailpipe emmissions.

What, liquid hydrogen? How many litres is that for 500 miles?

It's around 8kg of hydrogen.

122 litres of cryogenically frozen liquid hydrogen

But that is of course ********. You need way more hydrogen than 8kg.

8kg of hydrogen is about 1000 MJ.

That's about 29 litres of diesel. Something like 8 gallons

If you think you can do 500 miles on 29 litres of diesel good luck with
that.



Remember, these are fuel cell vehicles - they're not combusting hydrogen
in the traditional sense (which is what many people think hydrogen cars
do)

And they don't work. The efficiency if you try and pull any kind of
power out is abysmal.

Worse than an IC vehicle.

That's whey we don't use fuel cells anywhere.

The 'hydrogen economy' bull**** has been arounjd for years., Seems
someone still believes in it, but every major company that looked into
it has quietly dropped it.

That is the same for *all* green technology.

NONE of it works efficiently. The only things that do work badly and
inefficiently are windmills, solar panels and battery cars

But I wouldn't want to build a civilisation on them.

The problem is that youngsters today don't realise that people
calculated all this stuff years ago with slide rules, and shelved all
the solutions that simply didn't work well enough to pour private money
into. Steam powered aeroplanes. Windmills. Solar panels. Electric cars.

They only survive because people have bent the ears of government. And
we pay in extra taxes to prove how whit these technologies are.

We don't need subsidised hydrogen powered fuel cell cars either. Huge
tanks, limited power and very very dangerous.





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