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Engineering · Mechanical Engineering
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Consider a three-layer model for heat transfer from a human body. Assume rectangular coordinates for this model, and one-dimensional heat transfer (similar to a multi-layered wall of different materials. See Figure 10.6.1 on page 304 of your textbook, or the only figure on page 319 of your textbook). One layer is the body of thickness L,-0.22 m of thermal conductivity k,-0.42 W/mK The volumetric rate of metabolic heat production in the body core Qm- 880 W/m3. The body core is surrounded by a fat+skin layer of thickness L2 0.08 m. of effective thermal conductivity k 0.235 W/m.K. Heat is removed from the body by convection to the air, which is characterized by a heat transfer coefficient h. The air is at temperature Tair ) Determine the temperature profile in the body core. i) Determine the temperature profile in the fat+skin layer. ii) Determine the average temperature in the body core. M) Determine the temperature drop in the body core (ie, between x-0 and x-L) ) Determine the temperature drop across the fat+skin layer. vi) Determine the average temperature in the body core. AE BUESTON
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