AN EXPERIMENTAL STUDY OF A DEHUMIDIFYING AIR COIL WITH CONTINUOUS PLATE FINNED TUBE

Abstract

An experimental apparatus was established in order to investigate a dehumidifying air coil with continuous plate finned tube. Effects of face velocity of air, water flow rate and water temperature on both cooling load and air pressure drop were presented. The face velocity, the water flow rate and the water temperature are in range of 0.5 to 2 m/s, 12 to 18 LPM and 12 to 18oC, respectively. Meanwhile entering air temperature and relative humidity are maintained about 30oC and 68%. The results showed that both latent load and sensible load increased when the water temperature decreased. Airside pressure drop increased up to 25% when difference between entering water temperature and entering air dew point temperature increased from 5 to 11oC. Counter-current cross flow and cocurrent cross flow arrangements were also compared and results showed that cooling capacity in case of the countercurrent cross flow arrangement is 10% higher, and air pressure drops were negligible difference between the two cases.