Water at 290 K and 0.2 kg/s flows through a Teflontube
Chapter 8, Problem 8.74(choose chapter or problem)
Water at 290 K and 0.2 kg/s flows through a Teflontube (k?0.35 W/m?K) of inner and outer radii equalto 10 and 13 mm, respectively. A thin electrical heatingtape wrapped around the outer surface of the tube deliv-ers a uniform surface heat flux of 2000 W/m2, while aconvection coefficient of 25 W/m2?K is maintained onthe outer surface of the tape by ambient air at 300 K.What is the fraction of the power dissipated by the tape, which is transferred to the water? What is the outer sur-face temperature of the Teflon tube?
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