Compressor Duty Point
Compressor Duty Point
(OP)
Hi,
A P&ID states the duty of a screw compressor as “x CFM at y psig”, compressing atmospheric air. To work out the compressor mass flow rate for start-up conditions where the downstream pressure is also at atmospheric then I would use x and y? Is this correct or should the mass flow rate be based on x and atmospheric pressure?
A P&ID states the duty of a screw compressor as “x CFM at y psig”, compressing atmospheric air. To work out the compressor mass flow rate for start-up conditions where the downstream pressure is also at atmospheric then I would use x and y? Is this correct or should the mass flow rate be based on x and atmospheric pressure?





RE: Compressor Duty Point
Now if the air compression industry had standardized on STP instead of local atmospheric pressure and temperature you could calculate the mass flow rate at suction or discharge and SCFM would be the same, because it has to be.
David Simpson, PE
MuleShoe Engineering
In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. —Galileo Galilei, Italian Physicist
RE: Compressor Duty Point
RE: Compressor Duty Point
David Simpson, PE
MuleShoe Engineering
In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. —Galileo Galilei, Italian Physicist