A hot surface at 100 C is to be cooled by attaching 3-cm-long, 0.25-cm-diameter aluminum pin fins (k=237 W/mK) to it, with a center-to-center distance of 0.6 cm. The temperature of the surrounding medium is 30 C, and the heat transfer coefficient on the surfaces is 35 W/m^2 K. Determine the rate of heat transfer from the surface for a 1-m x 1-m section of the plate. Also determine the overall effectiveness of the fins.
A hot surface at 100 C is to be cooled by attaching 3-cm-long, 0.25-cm-diameter aluminum pin fins (k=237 W/mK) to it, with a center-to-center distance of 0.6 cm. The temperature of the surrounding medium is 30 C, and the heat transfer coefficient on the surfaces is 35 W/m^2 K. Determine the rate of heat transfer from the surface for a 1-m x 1-m section of the plate. Also determine the overall effectiveness of the fins.