Two little words: Liquid nitrogen

[Deleted member 1768]

Anyone checked into this yet? For those who understand expansion of a liquid to a gas I think it would be doable.

 

[summers]

Don't think the pressure would be sufficient to clear out the air already in the bag. You need to actually be able to inflate a balloon. Could pretty easily and cheaply get a small tank of n2 from a welding supply shop along with Ar gas or He gas.

 

[Deleted member 1768]

Don't think the pressure would be sufficient to clear out the air already in the bag. You need to actually be able to inflate a balloon. Could pretty easily and cheaply get a small tank of n2 from a welding supply shop along with Ar gas or He gas.

Liquid nitrogen is used quite extensively in recipes and gives off nitrogen gas. Occurred to me that filling a tub part way may be enough in a small bathroom.

 

[summers]

Yes, but the n2 gas is released at 0psi. There is insufficient pressure to evacuate the air already in the room. Also, the room is not air-tight. Even if you had a large canister of some inert gas at high psi (like n2 at 2200psi), you would only clear some the air out of the room for a very short time.

One way to think about this is if you create a vacuum in a 50 gallon drum, the pressure of the air we breathe will crush the drum that force will constantly be acting on the room to equalize the pressure.

 

[Deleted member 1768]

Yes, but the n2 gas is released at 0psi. There is insufficient pressure to evacuate the air already in the room. Also, the room is not air-tight. Even if you had a large canister of some inert gas at high psi (like n2 at 2200psi), you would only clear some the air out of the room for a very short time.

One way to think about this is if you create a vacuum in a 50 gallon drum, the pressure of the air we breathe will crush the drum that force will constantly be acting on the room to equalize the pressure.

It goes from liquid to gas. Explosive if completely contained. No way it would cause anything to implode. There are various examples on YT, liveleak, and google. I suggest you check it out.