YungPlantEng
Chemical
- Jan 19, 2022
- 82
Vendor documentation for an oil-cooled rotary screw compressor in compressed air service indicates multiple flowrate-pressure data points at "full loading".
Assuming a temperature change of 10 F between the two values we would achieve 11% more volumetric flowrate going from 490 cfm @ 100 psig to 444 cfm @ 125 psig. Is there any way to substantiate this flow improvement? Presumably since we're increasing our compression ratio we'd end up with higher heat losses but this can't really be accounted for with an oil-cooled system using our current instrumentation. I'm not even sure if using the discharge temperature to calculate SCFM since the system is continuously cooled throughout the compression.
Anyone have some pointers on this? We're planning to run at a higher pressure and regulating pressure down after our dry receivers for distribution to hopefully incur less low pressure events.
Assuming a temperature change of 10 F between the two values we would achieve 11% more volumetric flowrate going from 490 cfm @ 100 psig to 444 cfm @ 125 psig. Is there any way to substantiate this flow improvement? Presumably since we're increasing our compression ratio we'd end up with higher heat losses but this can't really be accounted for with an oil-cooled system using our current instrumentation. I'm not even sure if using the discharge temperature to calculate SCFM since the system is continuously cooled throughout the compression.
Anyone have some pointers on this? We're planning to run at a higher pressure and regulating pressure down after our dry receivers for distribution to hopefully incur less low pressure events.