Originally Posted by TrAncE XD
The problem isn't that... its that the gas is under such pressure and in the air, they would most likely blow up, and at sea, if something went wrong, there would be no quick fix. With the huge tankers, the gas isn't pressurized nearly as much AND its not a single company putting in money to make it happen.
You need to take a few numbers into account.
Most refrigerants are at between 200-300 psi at room temperature and above, and as low as 70-100psi at the temperatures found in an airplane's cargo hold. Atmospheric pressure is 14psi. So even if the airplane was flying in space
, the lack of external pressure would be NOWHERE NEAR enough to cause the refigerant system to "explode", which it wouldn't do anyways, most likely one of the copper lines would develop a crack which then would bleed the refrigerant out slowly. If you take into account that most airplane cargo holds are freezing cold, even with the reduced atmospheric pressure the system pressure of the phase unit would be hundreds
of psi lower than its safe operating limit.
Also, natural gas is always transported at low pressures in a supercooled liquid form. This does not however, mean that a natural gas tanker is not still a giant floating bomb. I would light a match in a shipping container full of phase units rather than a gas tanker any day.
e: Also, you can't ship nearly anything pressurized by air cargo anyways so it is sort of a moot point. If you could though it would still not be a cost effective method of shipping the units to the US. Even if the systems were shipped unpressurized they most surely would go by boat.