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chichi
15-02-2009, 08:48 AM
Hi,

I have question about Vi in screw compressor.
I want to know why discharge temperature increase if i use a compressor with higher Vi
Thanks;)

NH3LVR
15-02-2009, 02:31 PM
VI is a subject that needs a bit of study to understand.
Overcompression or Undercompression occurs when the VI is not correct.
I would suggest that you read this article. I refer to it often.
http://www.petroassist.com/Tech%20Know/ScrewCompressors.pdf

Thank you Mr. Pillis (The author of the article)

CHIEF DELPAC
16-02-2009, 06:00 PM
NH3LVR Thanks for the link C.D.

US Iceman
16-02-2009, 07:35 PM
If the volume ratio number (the number associated with the Vi) is higher than the optimum Vi, the compressor is over-compressing the gas. This causes the higher discharge temperature.

TXiceman
16-02-2009, 09:49 PM
Like US Iceman said...more compression pushes the discharge temperature up. Look at the Idael Gas Laws.

Ken

chichi
17-02-2009, 07:36 AM
Hi members

thanks for your complete answers.