Sustainability analysis of Two Stage Evaporative Cooling System

ABSTRACT In this paper exergy analysis of indirect-direct evaporative cooling system is presented. In this study ambient temperature, saturation specific humidity of the process and pressure at the end of the process is considered as the dead state. Variations in wet bulb saturation efficiency, Second Law Efficiency, Irreversibility, Entropy Generation and Sustainability Index are analyzed for pads of different thickness with constant face velocity. It is observed that for a give thickness of pads Second Law Efficiency does not changes as wet bulb saturation efficiency changes. Irreversibility and entropy generation change almost same manner. Sustainability index curve is almost flat for pads of same thickness. However it increases slightly with the thickness of the pads.