A steel pipe 150mm external diameter conveys steam at a temperature of 260°C and is covered by two layers of lagging, each 50mm thick. The thermal conductivity coefficient of the inside layer of lagging is 0.0865W/mK while that of the outside layer is 0.0952W/mK. The outside surface temperature of the steel pipe can be taken as being the same temperature of the steam. The ambient temperature is 27°C and the heat transfer coefficient of the outside surface is 15W/m²K. Calculate: 3.1 the heat lost/hr for a pipe length of 30m;

A steel pipe 150mm external diameter conveys steam at a temperature of 260°C and is covered by two layers of lagging, each 50mm thick. The thermal conductivity coefficient of the inside layer of lagging is 0.0865W/mK while that of the outside layer is 0.0952W/mK. The outside surface temperature of the steel pipe can be taken as being the same temperature of the steam. The ambient temperature is 27°C and the heat transfer coefficient of the outside surface is 15W/m²K. Calculate: 3.1 the heat lost/hr for a pipe length of 30m;

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

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