1. A beverage cooler is in the shape of a cube, 42 cm on each inside edge. Its 3.0-cm thickwall are made up of plastic (kr = 0.050 W/mK). When the outside temperature is 20°C,how much ice will melt each hour? Tice is 0°C.2. One of the possible mechanisms of heat transfer in human body is conduction throughbody fat. Suppose that heat travels through 0.03 m of fat in reaching the skin, which has atotal surface area of 1.7 m² and a temperature of 34°C. Find the amount of heat that reachesthe skin in half an hour, if the temperature at the body, interior is maintained at the normalvalue 37°C ? Thermal conductivity of body fat is k = 0.2 J/sm°C.3. The air in a room is at 25°C and outside temperature is 0°C. The window of the room hasan area of 2m² and thickness 2mm. Calculate the rate of loss of heat by conduction throughwindow ? Thermal conductivity for glass is 1 Wm¯'degree!.

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Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter2: Steady Heat Conduction

Section: Chapter Questions

Problem 2.21P

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