Entropy Rates and Efficiency of Convecting-Radiating Fins

We present a novel indicator for the effectiveness of longitudinal, convecting-radiating fins to dissipate heat. Starting from an analysis properties entropy rate steady state, we show how it is possible assess efficiency such devices by looking at amount produced in heat transfer process. Our study concerns both purely convective and convection-radiant takes advantage explicit expressions distribution along fin. It shown that, suitable limit, standard definition entropic coincide. The role fluid temperature new case. An application aluminium fin given. Analytical numerical results are discussed.