Thermodynamics HW Solutions 308

Thermodynamics HW Solutions 308 -...

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Chapter 4 Transient Heat Conduction 4-35 "!PROBLEM 4-35" "GIVEN" D=0.055 "[m]" T_i=8 "[C]" "T_o=70 [C], parameter to be varied" T_infinity=97 "[C]" h=1400 "[W/m^2-C]" "PROPERTIES" k=0.6 "[W/m-C]" alpha=0.14E-6 "[m^2/s]" "ANALYSIS" Bi=(h*r_o)/k r_o=D/2 "From Table 4-1 corresponding to this Bi number, we read" lambda_1=1.9969 A_1=3.0863
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Unformatted text preview: (T_o-T_infinity)/(T_i-T_infinity)=A_1*exp(-lambda_1^2*tau) time=(tau*r_o^2)/alpha*Convert(s, min) T o [C] time [min] 50 39.86 55 42.4 60 45.26 65 48.54 70 52.38 75 57 80 62.82 85 70.68 90 82.85 95 111.1 50 55 60 65 70 75 80 85 90 95 30 40 50 60 70 80 90 100 110 120 T o [C] time [min] 4-19...
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This note was uploaded on 01/19/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.

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