Abstract
This study investigated the partial load performance of an RAC unit using R-410A, R-32 and an HFO blend (R-446A). When compared to the optimal refrigerant charge of the R-410A system, that for the R-32 system was 20% lower and that for the R-446A system was 10% lower. The EER of the R-32 and R-446A systems at the same capacity under a full load were 104–110% and 97–98% that of the R-410A system, respectively. The compressor input powers in the SEER and SCOP conditions relative to those of the R-410A system were lower by a maximum of 9% and 7% for the R-32 system and higher by a maximum of 9% and 4% for the R-446A system. The overall SEER and SCOP values relative to those of the R-410A system were higher by 8% for the R-32 system and 1% for the R-446A system.
Published Version
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