EngiRef / Thermodynamics Engineering Formula
Stefan-Boltzmann Radiation
Stefan-Boltzmann Radiation: Emitted radiative power from a diffuse gray surface. A Heat Transfer formula in thermodynamics engineering. Variables Q, ε, σ, A…
Heat Transfer
Specification
- Name
- Stefan-Boltzmann Radiation
- Discipline
- thermodynamics
- Category
- Heat Transfer
- LaTeX
- Q = \varepsilon \sigma A T^4
- Description
- Emitted radiative power from a diffuse gray surface
- Conditions
- Net exchange requires a surrounding temperature term (T^4 - T_sur^4)
- Can solve for
- Q, ε, A, T
- Tags
- radiation, stefan-boltzmann, blackbody, thermal
Variables
| Symbol | Name | Unit | Si Unit | Imperial Unit |
|---|---|---|---|---|
| Q | Radiated Power | W | W | — |
| ε | Emissivity | — | — | — |
| σ | Stefan-Boltzmann Constant | W/(m²·K⁴) | W/(m²·K⁴) | — |
| A | Surface Area | m² | m² | ft² |
| T | Temperature | K | K | — |