# How do you calculate the radiative heat transfer coefficient?

##### 1 Answer

May 22, 2016

#### Explanation:

The Stefan-Boltzman law relates the total amount of radiation emitted by an object to its temperature:

ε=σT4

where:

ε = total amount of radiation emitted by an object per square meter (Watts

σ is a constant called the Stefan-Boltzman constant

= 5.67 x 10-8 (Watts

T is the temperature of the object in K.

Radiative heat transfer is a comparison of an actual materials emissivity to a “black body”.

Radiative exchange between two gray, diffuse surfaces may be characterized by calculating the radiative heat transfer coefficient as shown below: