Electrical conductors, in the form of parallel plates of length L = 40 mm, have one edge
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Electrical conductors, in the form of parallel plates of length L = 40 mm, have one edge mounted to a ceramic insulated base and are spaced a distance w = 10 mm apart. The plates are exposed to large isothermal surroundings at Tsur = 300 K. The conductor (1) and ceramic (2) surfaces are diffuse and gray with emissivities of ?1 = 0.8 and ?2 = 0.6, respectively. For a prescribed operating current in the conductors their temperature is T1 = 500 K.
(a) Determine the electrical power dissipated in a conductor plate per unit length, q, considering only radiation exchange. What is the temperature of the insulated base, T2?
(b) Determine q and Tz when the surfaces experience convection with an airstream at 300 K and a convection coefficient of h = 25 W/m2 ? K.
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KNOWN Electrical conductors in the form of parallel plates having one edge mounted to a ceramic insulated base Plates exposed to large isothermal surroundings Tsur Operating temperature is T 500 K FIN...View the full answer
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