HFC-236ea is one of the strongest candidates for a CFC-114 alternative in surface craft and submarine chillers. An earlier thermodynamic evaluation of the available alternatives resulted in the selection of HFC-236ea as the primary replacement candidate with coefficient of performance and volumetric capacity closest to those of CFC-114. A preliminary performance evaluation of HFC-236ea at 4,4 deg C evaporating and 40,6 deg C condensing temperatures in an oil-free compressor was performed in mid-1993 with promising results when compared compared to CFC-114 performance at the same conditions. Some material compatibility and oil miscibility work has also been peformed with HFC-236ea in support of its use as a refrigerant. Building on these earlier works, this paper presents more comprehensive experimental test esults for HFC-236ea in a compressor calorimeter using a semi-hermetic compressor. In this study both HFC-236ea and CFC-114 were tested at a range of temperatures covering chiller conditions. Evaporating temperatures ranged from 1,7 deg C to 12,8 deg C, and condensing temperatures ranged from 40,6 deg C to 65,6 deg C in order to develop a nine point test map. Polyol ester oil was used with the refrigerants. The following parameters were evaluated during the tests: suction and discharge pressures, their difference and ratio, cooling capacity, electric power, energy efficiency ratio (coefficient of performance), electric current, and compressor volumetric and isentropic energy efficiency. Compressor discharge, motor winding, and oil temperatures were also monitored.
Performance testing of a semi-hermetic compressor with HFC-236ea and CFC-114 at chiller conditions
Leistungsprüfung eines halbhermetischen Kompressors mit HFC-236ea und CFC-114 im Kühlerbetrieb
1994
5 Seiten, 12 Bilder, 7 Quellen
Conference paper
English
Evaluation of HFC 245ca and HFC 236ea as Foam Blowing Agents
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