Radiation Heat Transfer Calculator

Calculate thermal radiation exchange between surfaces using Stefan-Boltzmann law and view factors.

Temperature of the hot surface.
°C
Temperature of the cold surface.
°C
Polished metal: 0.05, Oxidized: 0.5-0.8, Black body: 1.0.
Emissivity of the receiving surface.
Area of the radiating surface.
m²
Fraction of radiation leaving surface 1 reaching surface 2. 0-1.

Results

Net Heat Transfer Rate-kW
Emissive Power Surface 1-kW/m²
Emissive Power Surface 2-kW/m²
Heat Flux-kW/m²
References: Incropera — Heat and Mass Transfer; Modest — Radiative Heat Transfer