X-Message-Number: 3401 Subject: SCI.CRYONICS: High Pressure CRYONICS LN boiloff From: (Ben Best) Date: Sun, 13 Nov 1994 03:58:00 -0500 Brian Wowk is correct in saying that high pressure would raise, rather than lower, boiling point temperature for liquid nitrogen. I was thoughtlessly repeating a suggestion that someone else had made. Lowering pressure, however, would lower the boiling point of liquid nitrogen. It would also add another level of costliness and difficulty in storage, plus increase total boiloff in a given period of time. Overall, it seems like a bad idea. Liquid helium storage would definitely be colder (-269 Celcius) and could be more economical, although I have no idea how much liquid helium costs per litre? I'd be curious to know -- can someone on the Net provide this information? -- Ben Best () Rate This Message: http://www.cryonet.org/cgi-bin/rate.cgi?msg=3401