A wind blows over the face of a person on a cold winter day. The temperature of the air is -5.0°C, while the person’s skin temperature is 35.0°C. If the convective heat transfer coefficient is 10.0 W/m2-K, and the exposed surface area of the face is 0.008 m2, determine the rate of heat loss from the skin via convection.
Given: Tf = -5.0oC; Ts = 35.0oC; h = 10.0 W/m2-K; A= 0.008 m2
What will be an ideal response?
Qconv = hA(Tf -Ts) = (10.0 W/m2-K)(0.008 m2)(-5°C - 35.0°C) = -3.2 W
The heat transfer is from the person to the air.
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