hotgas and crank case pressure regulator

[US Iceman]

i think we should not generalise by saying that HGBP be 50% of total capacity but it should abide some calculations

I am not saying we should generalize when it comes to system design. You need to do the calculations for all applications.

The point I was attempting to make was that the percentage of hot gas required for bypass will be approximately equal to the minimum step of capacity reduction available on the compressor(s).

The reason for the ASHRAE standard for energy use in buildings is due to the wasted energy to provide part load control with hot gas bypass. The hot gas only provides a false load to keep the compressor operating at some suction pressure.