Consider a concentric circular-tube annulus with outer

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Reference no: EM13626943

Consider a concentric circular-tube annulus, with outer diameter 2.5cm and inner diameter 1.25cm, in which air is flowing under fully developed, heat rate conditions. Heat is supplied to the inner tube, and the outer tube is externally insulated. The radiation emissivity of both tube surfaces is 0.8. The mixed mean temperature of the air at a particular point in question is 260C. The inner-tube surface temperature at this point is 300C. What is the total heat flux from the inner-tube surface at this point? What is the outer-tube surface temperature at this point? What percentage of the heat supplied to the inner tube is transferred directly to the air, and what percentage indirectly from the outer surface?

Reference no: EM13626943

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