Heat conduction calculator
Enter your values. The answer and the full worked solution update as you type.
Result
Heat flow80 W
Thermal resistance0.25 K/W
Heat flux8 W/m²
U-value0.4 W/(m²·K)
Step-by-step solution
Fourier’s law
R = L/(kA) = 0.1/(0.04·10) = 0.25 K/W
Q̇ = ΔT/R = 20/0.25 = 80 W
Key formulas
- Fourier’s law
- Q̇ = kAΔT/L
- Conduction resistance
- R = L/(kA)
- Convection resistance
- R = 1/(hA)
- Resistances in series
- Q̇ = ΔTtotal/ΣR
- U-value
- U = 1/(ΣR·A)
Practise Heat conduction
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