Discussion Forum
Que. | A steel pipe of 20 mm inner diameter and 2 mm thickness is covered with 20 mm thick of fiber glass insulation (k = 0.05 W/m degree). If the inside and outside convective coefficients are 10 W/m² degree and 5 W/m² degree, calculate the overall heat transfer coefficient based on inside diameter of pipe. In the diagram, the diameter of small circle is 20 mm
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a. | 1.789 W/m² degree |
b. | 2.789 W/m² degree |
c. | 3.789 W/m² degree |
d. | 4.789 W/m² degree |
Correct Answer:2.789 W/m² degree
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