Volumetric efficiency is a determining factor for the measurement of compessor capacity, but it is practically hard to take an accurate measurement of capacity characteristics so that most of users trust the data of makers catalogue. We often realized...
Volumetric efficiency is a determining factor for the measurement of compessor capacity, but it is practically hard to take an accurate measurement of capacity characteristics so that most of users trust the data of makers catalogue. We often realized the discrepancy in their data with actual capacity.
This study was attempted to establish the basic data of capacity characteristics of compressor by measuring volumetric efficiency of high speed multi-cylinder compressor and rotary compressor.
The volumetric efficiency was calculated based on the quantity of the flow of ammonia vapor and pressure difference in suction state of orifice plate and compressor.
The volumetric efficiency of high speed multi-cylinder compressor was 37-61% and that of rotary compressor was 57-82% when compression ratio was in the range of 4-12. The discrepancy in volumetric efficiency at an equal evaporating temperature between the makers catalogue and the measured data was 5.5%.