Evaporation Rate of Liquid Nitrogen: xpost from ME


by porkchop-sand
Tags: evaporation, liquid, nitrogen, rate, xpost
porkchop-sand
porkchop-sand is offline
#1
Oct31-11, 01:36 PM
P: 2
Hello everyone!

I am trying to design a magnetic testing apparatus that needs to remain at -196K for 20 minutes. There is not exactly a straight foreword equation to get a calculation for the evaporation rate of liquid nitrogen. The apparatus looks like this, and I have highlighted the area where the nitrogen will be located:



The calculations that I have have been using are as follows:



Is this equation accurate? Any advice would be appreciated.
Equation source: http://en.wikipedia.org/wiki/Acciden...e_source_terms

Thank you!
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