A horizontal steel pipe with 2 in outside diameter has an ou

A horizontal steel pipe with 2 in outside diameter has an outside surface temperature of 150. Calculate the heat losses per m length of pipe, taking into account convection and radiation losses. Assume that the emissivity of the surface of the tube is 0.75, the pipe is exposed to a room temperature of 20, and the convective heat transfer coefficient is 15 W/. The pipe is considered a small grey body in a large enclosure. The temperature of the surfaces seen by the pipe is equal to the air temperature.

Solution

this is the equation for heat loss

for calculating area of the pipe

Cross-sectional Area of the Pipe Material:

A = pi*((outer radius) ^2

after calculating area substitute temperature values and emissivity and stefen boltzman constant value

through this we will get heat osss through horizontal steel pipe

= 5.670367(13)×10⁸ W m² K⁴.

A=3.14m^2

by substituting these values we will get heat loss