Thermodynamics HW Solutions 950

Thermodynamics HW Solutions 950 -...

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Chapter 12 Radiation Heat Transfer 12-60 "!PROBLEM 12-60" "GIVEN" D_1=0.10 "[m]" D_2=0.30 "[m], parameter to be varied" D_3=0.20 "[m]" epsilon_1=0.7 epsilon_2=0.4 epsilon_3=0.2 "parameter to be varied" T_1=750 "[K]" T_2=500 "[K]" sigma=5.67E-8 "[W/m^2-K^4], Stefan-Boltzmann constant" "ANALYSIS" L=1 "[m], a unit length of the cylinders is considered" A_1=pi*D_1*L A_2=pi*D_2*L A_3=pi*D_3*L F_13=1 F_32=1 Q_dot_12_1shield=(sigma*(T_1^4-T_2^4))/((1- epsilon_1)/(A_1*epsilon_1)+1/(A_1*F_13)+(1-epsilon_3)/(A_3*epsilon_3)+(1-
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Unformatted text preview: epsilon_3)/(A_3*epsilon_3)+1/(A_3*F_32)+(1-epsilon_2)/(A_2*epsilon_2)) D 2 [m] Q 12,1 shield [W] 0.25 692.8 0.275 698.6 0.3 703.5 0.325 707.8 0.35 711.4 0.375 714.7 0.4 717.5 0.425 720 0.45 722.3 0.475 724.3 0.5 726.1 3 Q 12,1 shield [W] 0.05 211.1 0.07 287.8 0.09 360.7 0.11 429.9 0.13 495.9 0.15 558.7 0.17 618.6 0.19 675.9 0.21 730.6 0.23 783 0.25 833.1 0.27 881.2 0.29 927.4 0.31 971.7 0.33 1014 0.35 1055 12-47...
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