if liquid hydrogen is so cold why not use it on coolers and fridges?

Answer 1

Hydrogen is very volatile; i.e. it explodes easily.

Answer 2

Hello! Although I'm not a chemist I believe this can be summed up in one word, "Hindenburg". The Hindenburg was an airship that used Hydrogen as the source for buoyancy. Unfortunately one tiny spark set the whole thing off and it crashed in spectacular fashion.
I believe that hydrogen doesn't require a spark to set it off.
Another thing to consider is that hydrogen is the smallest of all the elements and therefore it requires more effort to keep it contained.
Also, when storing hydrogen the container may become embrittled by the hydrogen since the hydrogen can get into the crystal lattice structure of a metal. Each alloy is different so some experimentation might preclude this problem by using an alloy that isn't subject to hydrogen embrittlement under the temperatures and pressures you're dealing with.
On the bright side, if it leaks it won't pool on the ground before igniting like a gasoline would. On the dark side, it would be a shame if your fridge blew the top off of your house.
A common refrigerant that seems to work pretty well is actually Ammonia. Although there are a series of health risks involved in this as most refrigerants.
I hope this helps!

Answer 3

it's not cold, unless we cool it....

a good refridgerant converts from gas to liquid at higher than room temperature.

In a refidgeration cycle you pump the liquid to high presuure then it flashes to a gas as it passes though an orfice, this sucks in heat from the walls of the a heat exchanger/coil etc. to fullfill the latent heat of vaporization, then the gas passes to a compressor to turn it back to a fluid where it is held and cooled off. then back to the first compressor.


UPDATE
Responders are missing the point....Hydrogen has to be cooled to a Very low temperatute in order make it a liquid.....as a result It CANNOT be used in a refridgeration system....the system works by converting a liquid to a gas then back again. It just will not work unless your useing it at like -400F

Answer 4

have u ever studied that why does sodium catches fire when in water


,i.e,hydrogen catches fire very easily despite at a low temp. nobody knows that when the temp. may rise and i am sure that u will not like a fridge that may exploded without any warning

Answer 5

It is too cold, and it is dangerous. Refrigerants work because they can be compressed to make them release the heat they carry away from the chamber.