Water at m0.02 kg/s and Tm,i20C enters an annularregion
Chapter 8, Problem 8.93(choose chapter or problem)
Water at m??0.02 kg/s and Tm,i?20C enters an annularregion formed by an inner tube of diameter Di?25 mmand an outer tube of diameter Do?100 mm. Saturatedsteam flows through the inner tube, maintaining its sur-face at a uniform temperature of Ts,i?100C, while theouter surface of the outer tube is well insulated. If fullydeveloped conditions may be assumed throughout theannulus, how long must the system be to provide an out-let water temperature of 75C? What is the heat flux fromthe inner tube at the outlet?
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