very low temperature inlet compressor
very low temperature inlet compressor
(OP)
I have searched the web to no avail to locate a small
(1 to 2 hp) compressor for compressing nitrogen at -150 C(-240F) with a compression ratio of about 4.
I would appreciate any information on compressor design limitations at very low temperatures.
Thanks for your help
(1 to 2 hp) compressor for compressing nitrogen at -150 C(-240F) with a compression ratio of about 4.
I would appreciate any information on compressor design limitations at very low temperatures.
Thanks for your help





RE: very low temperature inlet compressor
I was also thinking, do you really need the nitrogen at those low temperatures? If need, it's maybe cheaper to get it heat up in an air cooler and then compress it with a normal compressor instead of one capable for those cryo temperature's.
Or maybe, when possible depending on your Nitrogen source, it's possible to pump liquid nitrogen. Then you only need a centrifugal pump to pump it to the designated pressure and then leed it through a vaporiser. (http://www.sefco.ch/Start/Index1024.htm)
Let me know what you have found.
Greetings
Cryotechnic
"Math is the ruler of your potential succes...."
RE: very low temperature inlet compressor
I e-mailed Rix . They can provide a compressor to handle only -100F.They did not say anything about specials, or if - 240 F is even possible.
I am trying to design a system with minimal compression work while economizing the liq N2.
I will e-mail a few more suppliers. Sanyo claims a very low temp compressor, but provide no details.
RE: very low temperature inlet compressor
Well, if your only use small amounts, I really want to suggest to use a pump to pump the liquid and then vaporize it.
With some control loops (pressure,flow, frequence of the pump) you will be able to control the LIN on a good way.
It's a very commomnly used system.
Another option can be: If you have a LIN-tank from your suplier, ask them what the max operation pressure of the tank is. If you run the tank on a higher pressure (thus, with a higher setting of the pressurise vaporiser) you maybe solve all your problems.
Ofcourse it depends on the pressure you you need in your system.
What is the pressure(barg) and flowrate(Nm3/h) your looking for?
For more info (like tech support), take also a look at www.linde.com
Good Luck,
Cryotechnic
"Math is the ruler of your potential succes...."
RE: very low temperature inlet compressor
RE: very low temperature inlet compressor
The system is for a liqN2 powered engine with vaporization of the liqN2 in an economizer by a secondary gas(N2 or air). The compressor is to pressurize the cooled secondary gas from 1 to 4 atm., thus economizing the liqN2 and using minimal compression work. Flow is about 6 cfm at compressor outlet.
Hope this makes sense
Steve
RE: very low temperature inlet compressor
RE: very low temperature inlet compressor
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