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Heat conduction through a flat layer

Estimate steady heat flow through a single homogeneous layer of material.

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01

Your inputs

The starting values are an example.

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02

Your result

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Your result will include the relevant values and units.

Understand the calculation

Formula and example

How it is calculated

Heat flow = λ × A × ΔT ÷ d; thermal resistance per unit area = d/λ

Worked example

λ = 0.04 W/(m·K), an area of 10 m², a thickness of 10 cm and a temperature difference of 20 K give 80 W.

Things to check

  • The result covers one layer. A complete wall also requires the other materials and heat transfer at both surfaces.
  • A negative sign indicates heat flow opposite to the direction defined by the chosen temperature difference.