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1: Heat conduction through a large plane wall Steady state heat transfer through pipes is in the normal direction to the wall surface (no
If the wall is hot, and we consider a liquid being heated in the pipe, the viscosity of the wall fluid will be smaller than that of the fluid in the bulk This
Heat transfer through a wall is one- dimensional when the temperature of the wall varies in one direction only FIGURE 3–2 Under steady conditions, the
The heat transfer from the fluid to the pipe walls is estimated and the temperature fluid and wall temperatures may vary along the length of the tube
and air sides and metal wall calculate the heat loss from 100 m length of the pipe Also find temperature drop across the insulation
HT-12 Figure 2 7: Heat transfer through an insulated wall heat transfer in a pipe of radius r1 surrounded by insulation of thickness r2 - r1 The solution for a
The temperature varies only in the radial direction For modeling heat flow through the pipe wall, it is convenient to use the end view shown on the following page