×
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!
  • Students Click Here

*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.

Students Click Here

Jobs

Centrifugal Compressor Performance

Centrifugal Compressor Performance

RE: Centrifugal Compressor Performance

Compressor shaft horse power:

SHP = m * (H(p) / [n(p) * 3300])* 1.02

m =  gas mass flow rate; n(p) = polytropic efficiency; H(p) = polytropic head; 1.02 = 2% gear losses

Polytropic head (ft):

H(p) = (1545/MW)*Z(avg)*T(1)*(n/(n-1))*[(P(2)/P(1))^(n-1/n)-1]

MW = gas molecular weight; Z = compressibility; T(1) = inlet temperature, R; n = compression coefficient; P(1) = suction pressure, psia; P(2) = discharge pressure, psia

RE: Centrifugal Compressor Performance

(OP)
Thanks,

It looks like SHP = GHP *1.02, where GHP is gas horsepower.

GHP= m * (778.16 / 33000)* {h(2)-h(1)]

If so that means I am on the right track.  Now, next step is to find a way to estimate (calculate) the mass flow for the two side loads from the economizer.





 

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