A 2 cm thick steel pipe (thermal conductivity= 43 W/[m °C]) with 6 cm inside diameter is being used.


A 2 cm dense steel pipe (interested conductivity= 43 W/[m °C]) with 6 cm within crossing is nature used to relegate fume from a boiler to process equipment for a remoteness of 40 m. The within pipe manner air is 115°C, and the without pipe manner air is 90°C ( Fig. E4.7 ). Calculate the sum fever dropping to the surroundings below steady-state conditions.