Radiation Absorption Rate Equation

For an object in a large isothermal enclosure with a gray-body approximation, P_abs = εσAT_env⁴. Use absolute temperature in kelvin.

$P_{absorption}=\text{Absorption Radiation Rate}\left(\text{Watt}\right)$​
$ϵ=\text{Emissivity}$​
$A=\text{Area}\left({\text{m}}^2\right)$​
$\sigma =\text{Stephan Boltzman Constant}\left(5.6704\times {10}^{-8}{\text{W/m}}^2{\text{K}}^4\right)$​
$T=\text{Temperature in the Environment}\left(\text{K}\right)$

[$\text{Watts}=\text{Joules/s}$]

Radiation Rate Equation, Stefan Boltzman Constant

Chapter 7 - Heat Transfer

Chapter 7 - FFR - Thermal Expansion