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Finding Maximum Pressure By Screw Type Compressors At Fixed Power , Wh


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#1 Javid Kocharli

Javid Kocharli

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Posted 10 February 2017 - 07:14 AM

Hi,

 

I have a screw type ( 2 stage ) compressor which sends propane to a vessel. Assuming all outlets of this vessel is closed, and there is no any PSV which protects the vessel from over-pressuring, what would be the maximum pressure exerted by this compressor? Assuming compressor is a fixed powered, and I only know the initial suction flow conditions. 

 

 

 



#2 Bobby Strain

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Posted 10 February 2017 - 10:58 PM

You must get the answer from the performance curves provided by the manufacturer.

 

Bobby



#3 Javid Kocharli

Javid Kocharli

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Posted 14 February 2017 - 03:17 AM

Bobby,

 

Thanks for your reply.

 

Currently, I do not have performance curves.  Basically, when we are talking about screw( or other PDP) , it is assumed the suction volume is kept constant. And, if the power is also fixed, maximum pressure supplied can be derived. But, I believe my case is a little bit different., assuming all discharges are closed, will the volume for suction of gas will change? ( Power=constant), I believe that, If the compressor takes less volume in the suction section, the discharge pressure will increase until the seal system fails.(so suction volume changes).  Could you please share your thoughts with me?

 

Many thanks






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