A Comparative Experimental Analysis of Different Geometry Fins

Abstract

The fins are generally used to increase the heat transfer rate by increasing the surface area which is to be in contact with surrounding fluid. It is necessary to study the effect of fin geometry on heat transfer rate. In this paper an experimental study was done to explore the effect of fin geometry on the performance of the fin. Uniform cross sectional fins such as circular, rectangular, square and a non-uniform cross section cone made of aluminium were used for the study. Same surface area is maintained for all fins (except cone) by maintaining same perimeter and length. Along length of the fin the temperature distribution, the rate of heat transfer, effectiveness and efficiency were studied under free and forced convection conditions. Different velocities of the air were considered for the study of forced convection condition. Experimental results obtained were compared with that of theoretical values. The results revealed that the rectangular cross sectional fin exhibits comparatively better performance in all aspects including quantity of material requirement.