EngineeringToolkit

Conduction Formula

The steady heat transfer rate through a plane wall.

Formula

q = kAΔT/L

Discipline: Thermodynamics. Result unit: W.

Variables and units

  • q — Heat Transfer Rate (W): Heat transfer rate
  • k — Thermal Conductivity (W/(m·K)): Thermal conductivity
  • A — Cross-sectional Area (m²): Cross-sectional area
  • ΔT — Temperature Difference (K): Temperature difference across the wall
  • L — Thickness (m): Wall thickness or conduction path length