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paresh_career001
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Location: Gujarat, India
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How to Calculate Compressibility Factor for Helium Gas?

04/27/2012 10:57 AM

How to calculate compressibility factor for helium gas? I want to use real gas properties of helium in pulse tube cryocooler. I need to use compressibility factor to calculate density at low temperature. Can I use Van der waal's equation of state to find the density or compressibility factor? How do I do that?

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lyn
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#1

Re: How to calculate compressibility factor for helium gas?

04/27/2012 11:10 AM

Compressibility factor - Wikipedia, the free encyclopedia
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bigg
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#2

Re: How to Calculate Compressibility Factor for Helium Gas?

04/27/2012 8:02 PM

Is this related to a university or research institution project? Surely they would have access to such data. 3 months ago you were looking for NIST data on helium. Any luck?
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paresh_career001
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Location: Gujarat, India
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#3
In reply to #2

Re: How to Calculate Compressibility Factor for Helium Gas?

04/28/2012 12:28 AM

Yes sir, You are right. This is institute project sponsered by DST-India. I am PhD student. We are having charts for Compressibility Factor for Helium but in order to use the values in simulation we require values at different pressure and temperature. So, it is very easy if we can calculate z directly not by use of graph. If you know please tell me.

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bigg
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#4
In reply to #3

Re: How to Calculate Compressibility Factor for Helium Gas?

04/28/2012 9:03 AM

Here's a link to a document which has an equation which may be adaptable to your needs:

http://www.ewp.rpi.edu/hartford/~ernesto/F2010/EP2/Materials4Students/Pandya/Petersen-1970-RISO224.pdf
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