OPTIMAL CONFIGURATION OF COMPRESSORS IN INDUSTRIAL REFRIGERATION SYSTEMS BASED ON PART-LOAD ZHANG J.(*,**), WEI D.(***) (*) Fujian Province Key Lab of Energy Cleaning Utilization and Development, Jimei University, China, (**) Cleaning Combustion and Energy Utilization Research Center of Fujian Province, Jimei University, China, (***) Fujian Snowman CO., LTD, China