Thermal Radiation Calculator (Stefan–Boltzmann Q=εσAT⁴)
Compute thermal radiation power via the Stefan–Boltzmann law Q = ε·σ·A·T⁴, and enter the surroundings temperature to get net radiative heat transfer.
Key points
Thermal Radiation Calculator (Stefan–Boltzmann Q=εσAT⁴): Compute thermal radiation power via the Stefan–Boltzmann law Q = ε·σ·A·T⁴, and enter the surroundings temperature to get net radiative heat transfer. Formula: Q = ε·σ·A·T⁴ ｜ σ = 5.67×10⁻⁸ W/(m²·K⁴). Enter parameters on the DD-CAT IDE online tool page to get results instantly, with a calculation-model diagram that updates with the inputs. Stefan–Boltzmann law: radiation power is proportional to the fourth power of absolute temperature, σ = 5.67×10⁻⁸ W/(m²·K⁴). Emissivity ε ranges 0–1: ideal blackbody 1, oxidized metals ≈ 0.6–0.9, polished metals as low as 0.02.
Inputs
Q = ε·σ·A·T⁴ ｜ σ = 5.67×10⁻⁸ W/(m²·K⁴)Calculation model (updates with parameters)
| Radiation power Q | 989.4 W | Q = ε·σ·A·T⁴ |
| Radiation per unit area | 989.4 W/m²W/m² | q = ε·σ·T⁴ |
| Net radiative heat transfer Qnet | 586.2 W | Qnet = εσA(T⁴ − Tsur⁴); positive means net heat rejection outward |
Engineering notes
- Stefan–Boltzmann law: radiation power is proportional to the fourth power of absolute temperature, σ = 5.67×10⁻⁸ W/(m²·K⁴).
- Emissivity ε ranges 0–1: ideal blackbody 1, oxidized metals ≈ 0.6–0.9, polished metals as low as 0.02.
- Net radiation Qnet = εσA(T⁴ − Tsur⁴) accounts for both outgoing emission and absorbed surroundings radiation; radiation dominates at high temperatures.
FAQ
- What is Thermal Radiation Calculator (Stefan–Boltzmann Q=εσAT⁴) for?
- Compute thermal radiation power via the Stefan–Boltzmann law Q = ε·σ·A·T⁴, and enter the surroundings temperature to get net radiative heat transfer.
- What is the formula for Thermal Radiation Calculator (Stefan–Boltzmann Q=εσAT⁴)?
- Core formula: Q = ε·σ·A·T⁴ ｜ σ = 5.67×10⁻⁸ W/(m²·K⁴). The tool returns results instantly using this formula and the selected parameters.
- What engineering notes should I keep in mind when using Thermal Radiation Calculator (Stefan–Boltzmann Q=εσAT⁴)?
- Stefan–Boltzmann law: radiation power is proportional to the fourth power of absolute temperature, σ = 5.67×10⁻⁸ W/(m²·K⁴). Emissivity ε ranges 0–1: ideal blackbody 1, oxidized metals ≈ 0.6–0.9, polished metals as low as 0.02. Net radiation Qnet = εσA(T⁴ − Tsur⁴) accounts for both outgoing emission and absorbed surroundings radiation; radiation dominates at high temperatures.