Question
Heat flow by conduction problem
Over what distance must there be heat flow by conduction from theblood capillaries beneath the skin to the surface if thetemperature difference is 0.45C°?Assume 190 Wmust be transferredthrough the whole body's surface area of 1.4 m2.
Answers
Given thatThe rate of heat flow (ΔQ/Δt) =190WSurface area of body (A) =1.4m2The temperature difference is (ΔT)=T2-T1=0.450CThermal conductivity of sink (k) = 0.2J/s m0CThe heat flow Q over a time interval t is given byΔQ/Δt=kA(T2-T1)/LThen the distance between the two ends isL=kA(T2-T1)/(ΔQ/Δt)Now substitute all the above values you get the requiredanswer
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