Chapter 3 Steady Heat Conduction3-162 An ice chest made of 3-cm thick styrofoam is initially filled with 45 kg of ice at 0°C. The length of time it will take for the ice in the chest to melt completely is to be determined. Assumptions1Heat transfer is steady since the specified thermal conditions at the boundaries do not change with time. 2 Heat transfer is one-dimensional. 3 Thermal conductivity is constant. 4 The inner surface temperature of the ice chest can be taken to be 0°C at all times. 5 Heat transfer from the base of the ice chest is negligible.PropertiesThe thermal conductivity of styrofoam is given to be k= 0.033 W/m⋅°C. The heat of fusion of water at 1 atm is h. if=333 7. kJ / kgAnalysis Disregarding any heat loss through the bottom of the ice chest, the total thermal resistance and the heat transfer rate are determined to be C/W6678.107508.05927
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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.