A horizontal, high-pressure steam pipe of 0.1-m outside diameter passes through a large room whose wall and air temperatures are 23OC. The pipe has an outside surface temperature of 165OC and an emissivity of ε = 0.85. Estimate the total heat transfer and compare in percentage, the heat transfer by free convection and radiation exchange from the pipe per unit length.
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Answer:
q'= 766 W/m
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