Thermodynamics HW Solutions 925

Thermodynamics HW Solutions 925 - A_2=2*A_1 Q 12 [W] T 1...

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Chapter 12 Radiation Heat Transfer 12-35 "!PROBLEM 12-35" "GIVEN" a=2 "[m]" epsilon_1=0.8 epsilon_2=0.5 Q_dot_12=800 "[W], parameter to be varied" T_2=500 "[K], parameter to be varied" sigma=5.67E-8 "[W/m^2-K^4], Stefan-Boltzmann constant" "ANALYSIS" "Consider the base surface to be surface 1, the side surfaces to be surface 2" Q_dot_12=(sigma*(T_1^4-T_2^4))/((1-epsilon_1)/(A_1*epsilon_1)+1/(A_1*F_12)+(1- epsilon_2)/(A_2*epsilon_2)) F_12=1 A_1=1 "[m^2], since rate of heat supply is given per meter square area"
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Unformatted text preview: A_2=2*A_1 Q 12 [W] T 1 [K] 500 528.4 525 529.7 550 531 575 532.2 600 533.5 625 534.8 650 536 675 537.3 700 538.5 725 539.8 750 541 775 542.2 800 543.4 825 544.6 850 545.8 875 547 900 548.1 925 549.3 950 550.5 975 551.6 1000 552.8 T 2 [K] T 1 [K] 300 425.5 325 435.1 350 446.4 375 459.2 400 473.6 425 489.3 450 506.3 475 524.4 500 543.4 525 563.3 550 583.8 575 605 600 626.7 625 648.9 12-22...
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