How to determine heat rise in gas compression (low pressure WC to psi

[flushman1]

I am interested in learning how to determine how much increase in heat/temp you get when you compress wet gas from low pressures (16 WC) to low pressures (2 to 5 psi) as well as the theory behind the solution. Any suggestions on reference texts?

 

[sheiko]

If you open a good thermodynamics, fluid mechanics or compressor book, you will certainly find the answer. You can also find it in old threads of this forum using the "search" button. Or even by googling "compressor discharge temperature" for example.

"We don't believe things because they are true, things are true because we believe them."

 

[dcasto]

The GPSA Databook has some simplified charts and the equations along with the explaination on how they get them.

Generally Tdisch = Tsuction * r^((k-1)/k) where r is ratio of compression and k is Cp/Cv. T is in degrees absolute.

 

[zdas04]

"r" is in absolute terms also (i.e., r=discharge psia/suction psia, or kPa, or bara, etc.).

 

[sheiko]

I've got another one from Campbell:
Tdis=Tsuc*{1+[r^((k-1)/k)-1]/Ef}
With Ef being the isentropic efficiency.
For centrifugal compressors a value of 0.70 to 0.75 is suitable.
For reciprocating use 0.70 to 0.75 for high speed units and 0.83 to 0.90 for low speed.

"We don't believe things because they are true, things are true because we believe them."