Consider a thin-walled tube of 10-mm diameter and 2-m
Chapter 8, Problem 8.61(choose chapter or problem)
Consider a thin-walled tube of 10-mm diameter and 2-m length. Water enters the tube from a large reservoirat m??0.2 kg/s and Tm,i?47C.(a) If the tube surface is maintained at a uniform temper-ature of 27C, what is the outlet temperature of thewater, Tm,o? To obtain the properties of water, assumean average mean temperature of T_m?300 K.(b) What is the exit temperature of the water if it isheated by passing air at T??100C and V?10 m/sin cross flow over the tube? The properties of airmay be evaluated at an assumed film temperature ofTf?350 K.(c) In the foregoing calculations, were the assumedvalues of T_mand Tfappropriate? If not, use prop-erly evaluated properties and recompute Tm,ofor theconditions of part (b).
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