A steam pipe 200 mm in diameter passes through a large basement room. The temperature of the pipe wall is 500?C, while that of the ambient air in the room is 20?C. Determine the heat transfer rate by convection and radiation per unit length of steam pipe if the emissivity of the pipe surface is 0.8 and the natural convection heat transfer coefficient has been determined to be 10 W/(m2 K).GIVENA steam pipe passing through a large basement roomPipe diameter (??) = 200 mm = 0.2 mThe temperature of the pipe wall (Tp) = 500?C = 773 KTemperature of ambient air in the room (T??) = 20?C = 293 KEmissivity of the pipe surface (ε) = 0.8Natural convection heat transfer coefficient (hc) = 10 W/(m2 K)ASSUMPTIONSSteady state prevailsThe walls of the room are at the same temperature as the air in the roomThe walls of the room are black (ε =1.0)

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L- Steam Plpe T, = 500°C T- 20°C 9, т, - 20°с