Study on efficiency improvement of packaged air conditioners for year round cooling with indirect outdoor air cooling : Part. 3 Performance test results on field trial

Abstract

This paper study on year-round cooling type packaged air conditioner by incorporating a refrigerant pump. When outdoor air temperature is low, the efficiency of year-round cooling type air conditioner can be improved by circulating refrigerant by the refrigerant pump. This paper discusses field trial results and calculates energy saving effects based on cooling capacity and electrical consumption at field trial. As a consequence result, this air conditioner can save more than 50% electrical energy at Sapporo and more than 40% at Tokyo in comparison with ordinary air conditioner.