Design and Analysis of Central Air-Conditioning system with Air Cooled Chiller of multi-storey office building

The air-cooled chillers consume significant energy in commercial building, and low efficiency calculated under part load condition and small control are part of reasons for such huge energy consumption. The efficiency of chiller can be improve by increasing heat transfer rate in condenser. Our paper considers how chiller performance can be improved by the selection of pump, chiller, AHU, grill size, diffuser size etc. The size of AHU and chiller are increased to increase the COP. Condenser effectiveness is enhanced by staging all condenser fans to decrease the condensing temperature. The analysis indicates that the COP improvements would be more considerable. The cooling energy saving potential for a representation of commercial building will be assessed when variable condenser temperature is applied to the air-cooled chiller plant. Fouling factor for condenser is minimized in this paper because of that the efficiency of air-cooled chiller increases. This study provides important insights into the low energy design and operation of air-cooled chiller.