CONDUCTION HEAT TRANSFER
7.5758)hr ft2 °F
Heat transfer across a rectangular solid is the most direct application of Fouriers law. Heat
transfer across a pipe or heat exchanger tube wall is more complicated to evaluate. Across a
cylindrical wall, the heat transfer surface area is continually increasing or decreasing. Figure 3
is a cross-sectional view of a pipe constructed of a homogeneous material.
Figure 3 Cross-sectional Surface Area of a Cylindrical Pipe