One end of a 0.3 m long steel rod is connected to a wall at 204?C. The
Question:
One end of a 0.3 m long steel rod is connected to a wall at 204?C. The other end is connected to a wall which is maintained at 93?C. Air is blown across the rod so that a heat transfer coefficient of 17 W/(m2 K) is maintained over the entire surface. If the diameter of the rod is 5 cm and the temperature of the air is 38?C, what is the net rate of heat loss to the air?GIVENA steel rod connected to walls at both endsLength of rod (L) = 0.3 mDiameter of the rod (D) = 5 cm = 0.05 mWall temperatures: Ts = 204?C TL = 93?CHeat transfer coefficient ( hc ) = 17 W/(m2 K)Air temperature (T??) = 38?CASSUMPTIONSThe wall temperatures are constantThe system is in steady stateThe rod is 1% carbon steelThe thermal conductivity of the rod is uniform and not dependent on temperatureOne dimensional conduction along therod
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Principles of heat transfer
ISBN: 978-0495667704
7th Edition
Authors: Frank Kreith, Raj M. Manglik, Mark S. Bohn