3 ms·
> Remember the ideal gas law? For anyone else who doesn't: https://en.wikipedia.org/wiki/Ideal_gas_law https://en.wikipedia.org/wiki/Ideal_gas_law "also called
by lucb1e 4y ago
> Remember the ideal gas law?
For anyone else who doesn't: https://en.wikipedia.org/wiki/Ideal_gas_law https://en.wikipedia.org/wiki/Ideal_gas_law "also called the general gas equation [...] is a good approximation of the behavior of many gases under many conditions". It seems to relate how pressure, volume and temperature interact (combined with some constant and how much gas there is). (Bit of a weird name; 'general gas equation' makes more sense to me.)
But okay so this reference is about "know how gas behaves?" and actually seems to mean "gas gets cold when it expands", if I understand the comment correctly (since I didn't have this in school). Not sure why the tank you're filling can't just have the same pressure if this is a problem (plunger on both ends, push the gas over, don't let the available space expand or shrink).
- ggreer 4y agoTo transfer gas into a tank, it has to go from higher pressure to lower pressure. If the pressure is equal, you won't transfer any gas. Also an empty tank is pretty much at atmospheric pressure. Gas has to expand to pressurize it. The easiest solution is probably to add heating coils around the parts that get cold. I haven't heard of any the hydrogen filling stations having such devices, but that's probably because hydrogen stations are only in California.