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Question on heat transfer of a plane wall

  1. Apr 24, 2009 #1
    1. The problem statement, all variables and given/known data

    A plane wall of 152 mm thickness has surface area of 2.32 m2. One side of the wall is kept at 82.2 oC, and the other side at 4.4 oC. The thermal conductivity of the wall material is 0.036 W/m.K at 0 oC, and that at 93.3 oC is 0.055 W/m.K. Calculate the rate of heat conduction through the wall


    2. Relevant equations

    Q= ∆T/R

    3. The attempt at a solution

    I do understand how to do this but i gt stuck at the part of the question that says "The thermal conductivity of the wall material is 0.036 W/m.K at 0 oC, and that at 93.3 oC is 0.055 W/m.K"

    Anyone can just explain to me what does it mean?
     
  2. jcsd
  3. Apr 24, 2009 #2

    djeitnstine

    User Avatar
    Gold Member

    That means you should estimate the thermal conductivity at your required temperatures
     
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