Displacement

[maltamarco]

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]

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]

Exactly. The displacement is the volume swept by the pistons, not the volume of refrigerant pumped.

[maltamarco]

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]

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]

Ok got it !!!

Thanks a lot
Marco