A long 1-cm-diameter electric cable is imbedded in a concrete wall (k = 0.13 W/(m K)) which is 1 m by 1 m, as shown in the sketch below. If the lower surface is insulated, the surface of the cable is 100?C and the exposed surface of the concrete is 25?C, estimate the rate of energy dissipation per meter of cable.GIVENA long electric cable imbedded in a concrete wallCable diameter (D) = 1 cm = 0.01 mThermal conductivity of the wall (k) = 0.13 W/(m K)Wall dimensions are 1 m by 1 m, as shown in the sketch belowThe lower surface is insulatedThe surface temperature of the cable (Ts) = 100?CThe temperature of the exposed concrete surfaces (To) = 25?CASSUMPTIONSThe system is in steady stateThe thermal conductivity of the wall is uniformTwo dimensional heattransfer

Transcribed Image Text:

1 m. 1 m 1 cm- Insulated Surface