1. Assumptions 1 The fins are sufficiently long so that the temperature of the fin at the tip is nearly T ∞ . 2 Heat transfer from the fin tips is negligible. Analysis Taking the temperature of the fin at the base to be T b and using the heat transfer relation for a long fin, fin efficiency for long fins can be expressed as η fin= if the entire fin were at base temperature = = = This relation can be simplified for a circular fin of diameter D and rectangular fin of thickness t and width w to be η fin,circular = = = η fin,rectangular = = = 2. A hot plate is to be cooled by attaching aluminum pin fins on one side. The rate of heat transfer from the 1 m by 1 m section of the plate and the effectiveness of the fins are to be determined. Assumptions 1 Steady oper...
Comments
Post a Comment