Plastic KETER sheds

[JohnW2]

How do you think they cool the gasses then? Particularly Hydrogen to 30°K ...

I'm not sure that I understand your question. As I've just written, it is impossible to liquify hydrogen at a temp above its 'critical temp' (about 33 K), no matter how high the pressure - but it would (just) be possible to liquify it at 30 K with a very high pressure. At the critical temperature (about 33 K) it would require a pressure of about 1,198 psi (the 'critical pressure', about 82.7 bar) to liquify hydrogen.

I have no idea, but would suspect/presume that hydrogen is usually stored at temps well above 33 K, hence inevitably as a compressed gas, with no liquid?

[ as a pedantic point, units of absolute pressure are, strictly speaking, Kelvin ('K'), not 'degrees Kelvin' ('°K') !! ]

 

[JohnW2]

.... I recall it as using a membrane filter to separate the hydrogen and a compressor similar to a jet engine to compress it sufficiently to turn it to liquid.

As I've recently written, at its 'critical temperature' (about 33 K) it would require a pressure of about 1,198 psi (the 'critical pressure', about 82.7 bar) to liquify hydrogen - so not totally impossible. However, as said, it would be impossible to liquify it at temps above about 33 K, no matter how much pressure you coud come up with!

 

[SUNRAY]

... but I recall it as using a membrane filter to separate the hydrogen and a compressor similar to a jet engine to compress it sufficiently to turn it to liquid.

As I've recently written, at its 'critical temperature' (about 33 K) it would require a pressure of about 1,198 psi (the 'critical pressure', about 82.7 bar) to liquify hydrogen - so not totally impossible. However, as said, it would be impossible to liquify it at temps above about 33 K, no matter how much pressure you coud come up with!

and you conveniently take the post out of context

 

[JohnW2]

and you conveniently take the post out of context

Eh?