- 1 W/(m.K) = 1 W/(m.oC) = 0.85984 kcal/(hr.m.oC) = 0.5779 Btu/(ft.hr.oF)
- Conduction will take place if there exist a temperature gradient in a solid (or stationary fluid) medium.
- Energy is transferred from more energetic to less energetic molecules when neighboring molecules collide. Conductive heat flow occurs in the direction of the decreasing temperature since higher temperatures are associated with higher molecular energy.
- Fourier's Law express conductive heat transfer as q = k A dT / s (1)
- A = heat transfer area (m2, ft2)
- k = thermal conductivity of the material (W/m.K or W/m oC, Btu/(hr oF ft2/ft))
- dT = temperature difference across the material (K or oC, oF)
- s = material thickness (m, ft)
Krypton .0088
Argon .016
Acrylic .02
Oxygen .024
Cotton .029
Polystyrene .03
Polyurethane foam .03
Styrafoam .033
Wool blankets .04
Fiberglass .04
Fiber insulation board .048
Plywood .13
Pine .147
Oak .17
Gypsum .17
Vinyl .25
Water .58
Concrete 1.0 - 1.8
Glass (single pane) 1.05
Slate 2.01
Marble 2.08 - 2.94
Ice 2.18
Rock 2 – 7
Stainless steel 16
Lead 35
Carbon steel 54
Tin 67
Platinum 70
Nickel 91
Brass 109
Zinc 116
Aluminum 250
Gold 310
Copper 400
Taken from http://www.engineeringtoolbox.com/conductive-heat-transfer-d_428.html
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