1. A hot surface at 100 C is to be cooled by attaching 3 cm long,...

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1. 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/m°C) 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 surface is 35 W/m2 °C). Determine the rate of heat transfer from the surface for a lmx1m section of the plate. Also determine the overall effectiveness of the fins? Assume heat transfer from the fin tip is negligible. (50 points) Related equations: h.p Qfintotal Ofin Nfin. Ofinmax and and m = Efinoverall %3D V k.Ac Qnofin 1. 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/m°C) 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 surface is 35 W/m2 °C). Determine the rate of heat transfer from the surface for a lmx1m section of the plate. Also determine the overall effectiveness of the fins? Assume heat transfer from the fin tip is negligible. (50 points) Related equations: h.p Qfintotal Ofin Nfin. Ofinmax and and m = Efinoverall %3D V k.Ac Qnofin