An L 1-m-long vertical copper tube of inner diameter Di 20
Chapter , Problem 7.48(choose chapter or problem)
An L 1-m-long vertical copper tube of inner diameter Di 20 mm and wall thickness t 2 mm contains liquid water at Tw 0 C. On a winter day, air at V 3 m/s, T 20 C is in cross flow over the tube. (a) Determine the heat loss per unit mass from the water (W/kg) when the tube is full of water. (b) Determine the heat loss from the water (W/kg) when the tube is half full.
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