INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

calculation to determine compressibility factors

calculation to determine compressibility factors

(OP)
Need help in calculation for determining the compressibility factor of nitrogen, natural gas, and air at various pressures and temperatures. Any help will be greatly appreciated Thanks.

RE: calculation to determine compressibility factors

(OP)
Thanks Latexman, I tried the link but nothing happened as I waited for a good five minutes thinking it might be a large file.

RE: calculation to determine compressibility factors

There is a simplified version in the GPSA Engineering Data Book (if you don't have one and you work in gases you are making a huge mistake). It doesn't handle acid gases very well, but comes quite close to the NIST REFPROP.exe equation of state for hydrocarbon products. Both air and Nitrogen are so close to ideal gases that any use you put your equation too will not suffer from calling it 1.0.

For natural gas that includes some acid gas I use the Hall-Yarborough correlation with the Turek modification for acid gas, and below about 5,000 psi it is close enough to REFPROP (which is very close to what you would get from something like HySys). This correlation takes about 3 pages to implement in a MathCad program.

David Simpson, PE
MuleShoe Engineering

In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. Galileo Galilei, Italian Physicist

RE: calculation to determine compressibility factors

(OP)
Thanks Latexman, the last link you sent works fine. This is a great tool. Again thanks!!!!

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close