Experimental Investigation of Effects of Angle of inclination on Convective Heat Transfer through Permeable Fins in Natural Convection | Original Article

ABSTRACT:

Fins are generally used to enhance the heat transfer rate in many industrial applications. In this study solid and permeable fins are compared for various heat inputs and at different angle of inclinations under natural convection mode. Heat input was given to fins by using heating element at base, fitted inside heat resisting casing so as to achieve unidirectional flow of heat towards base of fins. Permeable fins were made by drilling holes on plane surface of solid fins. Experimentation was carried out for five different arrangements of holes. Fins with three inline holes, five diagonal and zigzag holes, six inline holes and eight inline holes were the different arrangements used for the experimentation. Heat input was varied from 10W to 25W and angle of inclination was varied from 00to 900.It was found that convective heat transfer rate was increased up to 21% by using permeable fins. Also maximum heat transfer rate was found for vertical fins arrangement. Heat transfer coefficient increases by increasing no. of holes or by increasing angle of inclination for natural convection.