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Application for gas compression: what Kind of compressor?

Application for gas compression: what Kind of compressor?

Application for gas compression: what Kind of compressor?

(OP)
I would like to know what kind of natural gas compressor I have to install for the application below:
 
Gas Flowrate:           420 Scm / h   (standard cubic meter per hour)
Psuction:                   0.2 barg
Temperature suction:           40 °C
Delivery pressure      3 barg
 
 
Thank you,

RE: Application for gas compression: what Kind of compressor?

if fuel or energy isn't a big problem, then a oil flooded screw.  If you want to use less energy, then a single stage reciprocating compressor.

RE: Application for gas compression: what Kind of compressor?

I'm not sure I agree with dcasto that the overall fuel efficiency of a flooded screw is that bad.

The application works for either a single-stage recip or a flooded screw.  I think the key decision point is how constant is the suction and discharge conditions (pressure, temperature, flow rate)?  If they're dead constant at the design conditions you can save 6-8% of your fuel/power load by using a recip.  If the suction conditions can vary by more than 5% then you'll probably save fuel/power costs with a flooded screw (and possibly save on the cost of crashes).  If the most likely variation is the discharge pressure then you will definitely be better off with a single-stage recip.

David

RE: Application for gas compression: what Kind of compressor?

I got a 5% increase in required HP for the screw at this low of volume and small ratio.  I just quoted in general terms.

RE: Application for gas compression: what Kind of compressor?

Looks like we're in the same universe here, 5% extra for fuel on a constant suction application does not make sense.  For a variable suction application it really does.

David

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