Energy Recovery for Humidity Control in an Air Conditioning System

This book presents a proposed idea to make use of the thermal energy rejected by the condenser in a window-type or split air conditioning systems to decrease the air relative humidity of the cold air supplied by the air conditioner to a space for certain purposes. An amount of heat is rejected from the air conditioner through the condenser into its surrounding as a part of the refrigeration cycle. In this book, this lost energy is reused to heat water. Then the hot water is used to relatively decrease the relative humidity of the supplied-cooled air. Four variables were studied to find out the effective controlling parameters. These are the coil type (single or double), the amount of flowing water, water temperature, and the cold air velocity. The experimental results leads to the effective parameters that may improve the design of the introduced heat exchanger that make use of the heat rejected from the condenser. Finally; the proposed heat recovery concept in air conditioning systems can be worthy adopted and could achieve economic results in large scale systems.