Question

Select 1 m / s for a wall-illuminated 3 mm, inner 10 mm, 100 m long pipe, the incoming fluid entering 85 is cooled to 75 ℃. Apart from the pipe, there is a heat transfer coefficient of 7.8 W / m2.K and cross flowing water.
a) Calculate the temperature before the fluid.
b) Is the fluid flow laminar in the pipe? Is it turbulent? Why?
c) Calculate the heat transfer coefficient between the fluid and the inner surface of the pipe.
d) Calculate the thermal resistance of the inside, outside and wall of the pipe.

fluid:    J/kg.K      kg/m³       

                 m²/s                       

Boru: kboru=240 Wm.K

Answer 1