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# Calculate the rate of heat transfer through the section of the composite wall that is 1 m deep Into sheet as shown in the dimensioned figure belowThe indoor temperature is 20°C and the 110 outdoor

Calculate the rate of heat transfer through the section of the composite wall that is 1 m deep (Into sheet) as shown in the dimensioned figure below. The indoor temperature is 20°C and the 110 outdoor and surrounding temperatures are both -5°C, and the convection heat transfer respectively. The emissivity is £ = 0.7. The outer surface of the wall is -4.3°C. Assuming e-coefficients on the inner and the outer sides are h, 10 VV/m'.K and 110 = 25 ,,N1rW.K. dimensional heat transfer and including both radiation and convection on the outside wall, I determine the rate of heat transfer through the wall. pOLUTION he composition of a composite wall is given [e rate of heat transfer through the wall is to be determined. ",17.1, tin's • „eat„.2rr':::7:4=Zrz'sa:=Virzfn:zrath,=,..m.anuyinthe x-direction. Thermal conductivities are constant. 4. Heat transfer by radiation is also present on the outer wall. properties conductivities are given to be k, 0.72 Wirn.K, k, 0.22 Wm., K, = 0.18,1fm , =0.63 VV/mK and I, = 0.36 W/m•K. Draw Below the proper ',circuit. I
30 cm kl inside outside
4

Jun 15 2020 View more View Less