A room is heated by a 1.2 kW electric resistance heater whose wires have a diameter of
Question:
A room is heated by a 1.2 kW electric resistance heater whose wires have a diameter of 4 mm and a total length of 3.4 m. The air in the room is at 23°C and the interior surfaces of the room are at 17°C. The convection heat transfer coefficient on the surface of the wires is 8 W/m2 · K. If the rates of heat transfer from the wires to the room by convection and by radiation are equal, the surface temperature of the wire is
(a) 3534°C
(b) 1778°C
(c) 1772°C
(d) 98°C
(e) 25°C
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Step by Step Answer:
To find the surface temperature of the wire we need to set up an equation based on the condition that the rates of heat transfer from the wires to the ...View the full answer
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Related Book For 
Heat And Mass Transfer Fundamentals And Applications
ISBN: 9780073398181
5th Edition
Authors: Yunus Cengel, Afshin Ghajar
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