Well, thanks indeed for your anwser.
Neverheless, Hydrocom capacity control is a stepless one, where in function of the capacity required, f.e. 53%, or 67%, the unloaders are partially open during the compresing stroke. This way part of the displaced gas is not compressed. Simply gets out back...
This angle, I do not think can be calculated. Actual minimum Rod Reversal Angle data is afforded on experience basis.
From a manufacturer course, all that I've been provided is that assuming inlet pressure of oil 50psig at X-HD, the minimum angle that connecting rod and horizontal axis may form...
Has anyone references and/or experience with 3000kw Cryogenic (-160ºC)reciprocating compressor, 19000kg/h of CH4, 3 stages, 6 Cyl's, governed with a HydroCOM stepless capacity system.
I guess many problems may arise from the huge number of unloaders to control and the rather low temp's.
