Quote Originally Posted by Segei View Post
I've done this estimation for Frick screw compressor. Just double checked Frick numbers. Refrigeration effect difference(120 psig and 150 psig) is 1% for compressor with economizer and 3% without(this is not typical for industrial refrigeration). Suction pressure 3.6 psig(-20F) is typical for cold storages.
Do not have Frick data, but other compressors, my calcs come out to be 17% increase in evap refrigeration effect. But I am not one to argue with frick. (non economized)