Starting from the energy balance for the element of Ax thickness for one dimensional, show that the energy equation of transient two dimensional with no heat source is given by: R T T 1 37 ax2 [ ay 2 α ότ

1) Draw the thermal resistance network representing heat transfer through the shell. 2) Determine the heat rate transfer under steady state conditions (W) 3) Determine the emissive power being emitted from the outside of the cylindrical tank (W). You can ignore emission from the top and bottom surfaces.

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For steady state heat conduction in a composite wall (As = 5 m², LA=1 cm and LB =2 cm) as shown in below figure. Calculate the total thermal resistance and the rate of heat transfer from the wall also find the temperatures Ts1, Ts2 and Tc To,z=200°C h₂=10W/m².K KA=0.1 W/m-K T5,1 HL-L₂ 17 Tc Too,2 = 40°C h₂-20W/m².K k=Q04 W/m-K