Question

Water at 290K and .2 kg/s flows through a Teflon tube (k=.35W/m * K) of inner and outer radii equal to 10 and 13 mm,respectively. A thin electrical heating tape wrapped around theouter surface of the tube delivers a uniform surface heat flux of2000 W/m^2, while a convection coefficient of 25 W/m^2, while aconvection coefficient of 25 W/m^2*K is maintained on the outersurface of the tape by ambient air at 300 K. What is the fractionof the power dissipated by the tape, which is transferred to thewater? What is the outer surface temperature of the Teflontube?

Answer 1

The fraction of power dissipated by the tape to the heat transferred to water is 0.90.

The temperature at the outer surface of Teflon tube is 308.3 K.

Step-by-step explanation:

Detailed explanation is given in the attach document.