Turn-Down Ration for Centrifugal Compressor? 4

[Sabergg1981]

Hi All.

I am looking for a suitable turn down ratio for centrifugal compressors? Does it depend on compression ratio?

For a Centrifugal compressor with ratio of about 4 and a capacity of 350000 kg/hr ,what turn down ratio do you suggest?

 

[Sabergg1981]

i want to arrange me number of compressor from approach of capacity and power required. our process guys insist on 2(7+1) centrifugal compressors with a turn down of 50% and also mention every compressor need to about 12 MW.

 

[zdas04]

OK, first I read MSCMPD as MMSCF/d. Sorry, just a bit of dyslexia. If I assume that the leading "M" is metric for "mega" not Oil & Gas for "Thousand" then the job is 2400 MMSCF/day

In the early days you are only doing 1.3 compression ratios, 30 hp/MMCF, or 72000 hp (54 MW). Late days you are doing less than 4 compression ratios and 85 hp/MMSCF, so for 141 MMSCF/day you would use something like 12000 hp or 9 MW.

David Simpson, PE
MuleShoe Engineering

"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.
The plural of anecdote is not "data"

 

[Sabergg1981]

Ok . Then the maximum power of a reciprocating compressor of ariel is about 2000 hp. So we need 72000hp/2000hp=36 reciprocating compressor. Do i think correctly?

 

[Sabergg1981]

MSMPD means million standard cubic meter per day. Also suction temperature is about 50C. I did not pay attention to unit u use before.
I want to know how many recip compressor can handle our field?

 

[zdas04]

KBV frame is 10,000 hp. Call it 8 machines.

David Simpson, PE
MuleShoe Engineering

"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.
The plural of anecdote is not "data"

 

[Sabergg1981]

@ Dear Zdas04

As you know i am involved in construction of a gas compressor station but i think i have no much practical knowledge. Pmover gave me some references such as PHMSA but i want to have some detail references about compressors and also gas compressor stations. we both know there are to many references such as handbooks... exist in this subject that all of them are useful. and i know you as a experienced guy in this field. so i wanted you to introduce me the latest and useful source in subject of compressors and subject of gas compressor stations based on your experience and upstream guys you met and discuss.
thanks alot

 

[zdas04]

Sorry, never saw a compressor book I would recommend and the one I plan to write has been "sometime in the next 5 years" for the last 10 years, so don't hold your breath.

David Simpson, PE
MuleShoe Engineering

"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.
The plural of anecdote is not "data"