Consider a thin-walled, metallic tube of length L1mand
Chapter 8, Problem 8.65(choose chapter or problem)
Consider a thin-walled, metallic tube of length L?1mand inside diameter Di?3 mm. Water enters the tubeat m??0.015 kg/s and Tm,i?97C.(a) What is the outlet temperature of the water if thetube surface temperature is maintained at 27C?(b) If a 0.5-mm-thick layer of insulation of k?0.05W/m?K is applied to the tube and its outer surfaceis maintained at 27C, what is the outlet tempera-ture of the water?(c) If the outer surface of the insulation is no longermaintained at 27C but is allowed to exchange heatby free convection with ambient air at 27C, what isthe outlet temperature of the water? The free convec- tion heat transfer coefficient is 5 W/m2?K
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