The discussion revolves around the differences between one-stage and two-stage compressors, including their operational characteristics, efficiency, and temperature management. Participants explore the implications of these differences in various applications, particularly in relation to pressure and temperature control.
Participants express differing views on the relationship between temperature and outlet pressure, as well as the efficiency of one-stage versus two-stage compressors. No consensus is reached on these points.
Some statements rely on specific operational conditions and assumptions about compressor design and application. The discussion includes anecdotal evidence and personal experiences that may not generalize across all compressor types.
Individuals interested in mechanical engineering, compressor design, and operational safety in industrial applications may find this discussion relevant.
Studiot said:This sounds like a homework project.
What have you already found out?
you are correct.I think the difference between the two is the temperature.
jim hardy said:you are correct.
Find an old copy of Marks' Mechanical Engineer's Handbook, or Machinery Handbook.
It cautions against trying to operate single stage compressors above 100 psi because of the fire hazard to surrounding buildings.
We had some mis-applied compressors in my plant, single stage set to unload at ~120 psi.
I watched them struggle to make that last twenty psi with the temperature gage in outlet hovering around 410 degrees F. They continually burned up exhaust valves and piston rings.
Air compressor oil has high temperature capability - you shouldn't use ordinary engine oil in your little 125psi home reciprocating compressor.