Conference Year
2018
Keywords
Low GWP, Refrigerants, Scroll compressor, Economizer, Transport refrigeration
Abstract
One hermetic scroll compressor with an economizer port that is built initially for R404A has been tested with R404A in a compressor calorimeter. The testing has been completed on several running conditions to create a compressor operating map. Based on this map, a compressor efficiency model has been created. This model has been used to calculate capacity, COP and discharge temperature for frozen and fresh conditions in the transport refrigeration application with R452A, R454A and R454C. The capacity, COP and discharge temperature for those frozen and fresh conditions are compared with R404A. Another hermetic scroll compressor with an economizer port that is built initially for R134a has been tested with R134a in a compressor calorimeter. The testing has been completed on several running conditions to create a compressor operating map. Based on this map, a compressor efficiency model has been created. This model has been used to calculate capacity, COP and discharge temperature for frozen and fresh conditions in the transport refrigeration application with R513A and R1234yf. The capacity, COP and discharge temperature for those frozen and fresh conditions are compared with R134a. Furthermore, a general comparison is made between the two different compressors and the two different refrigerants, where one is tested on R404A and the other is tested on R134a. In this case, COP and discharge temperature is compared. Since some of the refrigerants have glide characteristics, calculations based on dew-point and mid-point are compared.