Wearing layers of clothing in cold weather is often recommended because dead-air spaces between the layers keep

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Wearing layers of clothing in cold weather is often recommended because dead-air spaces between the layers keep the body warm. The explanation for this is that the heat loss from the body is less. Compare the rate of heat loss for a single 2-cm-thick layer of wool (k = 0.04 W/ (m K) ] with three 0.67-cm layers separated by 1.5 mm air gaps. The thermal conductivity of air is 0.024 W/(m K).

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Principles Of Heat Transfer

ISBN: 9781305387102

8th Edition

Authors: Frank Kreith, Raj M. Manglik, Mark S. Bohn

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