Thermodynamics HW Solutions 303

Thermodynamics HW Solutions 303 - b=(h*A)/(rho*C_p*V)

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Chapter 4 Transient Heat Conduction 4-24 "!PROBLEM 4-24" "GIVEN" D=0.008 "[m]" "T_i=900 [C], parameter to be varied" T_f=100 "[C]" T_infinity=35 "[C]" h=75 "[W/m^2-C]" n_dot_ball=2500 "[1/h]" "PROPERTIES" rho=7833 "[kg/m^3]" k=54 "[W/m-C]" C_p=465 "[J/kg-C]" alpha=1.474E-6 "[m^2/s]" "ANALYSIS" A=pi*D^2 V=pi*D^3/6 L_c=V/A Bi=(h*L_c)/k "if Bi < 0.1, the lumped sytem analysis is applicable"
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Unformatted text preview: b=(h*A)/(rho*C_p*V) (T_f-T_infinity)/(T_i-T_infinity)=exp(-b*time) m=rho*V Q=m*C_p*(T_i-T_f) Q_dot=n_dot_ball*Q*Convert(J/h, W) T i [C] time [s] Q [W] 500 127.4 271.2 550 134 305.1 600 140 339 650 145.5 372.9 700 150.6 406.9 750 155.3 440.8 800 159.6 474.7 850 163.7 508.6 900 167.6 542.5 950 171.2 576.4 1000 174.7 610.3 4-14...
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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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