View Full Version : Displacement
maltamarco
05-01-2011, 05:34 PM
Hi Guys
Can you help me in this :
If a compressor with a displacement of 10 meter cube hour is displacing gas with a pressure of 10 bar, it is displacing 100 meter cube hour ??
(10 meter cube x 10 bar)
Marco
Brian_UK
05-01-2011, 09:14 PM
NO, the specification of 10m3/hr at 10 bar means just that.
If the disharge pressure is at 10 bar then the compressor can only pump 10m3/h.
If, however, the pressure drops then the compressor may be able to pump more as the resistance has fallen.
NoNickName
06-01-2011, 07:53 PM
Exactly. The displacement is the volume swept by the pistons, not the volume of refrigerant pumped.
maltamarco
07-01-2011, 06:56 AM
Ok I know what you mean .So a compressor of 10m3/h discplacment, it is not discplacing 100m/3 hour, but yes it pumping a volume of 100Nm3/h if the gas is entering in the cylinder at pressure of 10 bar is correct like this ????
NoNickName
07-01-2011, 07:55 AM
No. The pistons are sweeping 100m3/h, but the actual Nm3/h depends on the volumetric efficiency which is unknown and depends on the pressure drops of valves and manifolds...
maltamarco
07-01-2011, 06:44 PM
Ok got it !!!
Thanks a lot
Marco
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