Experimental Study of Frost Phenomena on Metal Fin-shaped Plate in Forced Convection Condition

Abstract

Experimental study on frost phenomena on metal fin-shaped plate in forced convection was carried out. The humidity and temperature of supplied air flow were controlled by using the bubbling system and the constant temperature water bath, respectively. The air flow velocity and humidity were changed as the experimental condition. Direct observation using two video cameras during the frosting and defrosting was performed. The temperature measurements on fin-shaped plate by thermo couples attached by spot welding on the fin-plate were also carried out. The effects of the humidity and the flow velocity on the frosting and defrosting characteristics were discussed concerning the heat and mass transfer during the air flow and fin-shaped plate.