Operational Efficiency of Oil-Flooded Carbon Dioxide Screw Refrigerating Compressor as Dependent on the Supplied Oil Temperature

摘要

The article presents the results of a theoretical study concerning the temperature influence of the oil supplied into the screw oil-flooded compressor on its efficiency under frequency regulation. The results of the research have shown that if the frequency regime of the compressor is changed by varying the oil proportion and the degree of its heating before supplying into the working cavity within certain limits, the new operating point will have the same or the largest value of the effective efficiency at a given new frequency.