Thermal radiation power - this is the quantity thermal energy, emitted by the surface of a body in the form of electromagnetic waves per unit of time. Thermal radiation occurs from all objects with a temperature above absolute zero and depends on the temperature of the object, its surface, and its emissivity.
Thermal radiation power: characteristics
- Units of measurement: Measured in watts (W).
- Temperature dependence: The higher the temperature of a body, the more energy it radiates. According to the Stefan-Boltzmann law, the power of heat is proportional to the fourth power of temperature.
- Emissivity: Determines how efficiently a body radiates heat compared to an ideal black body.
Application:
This parameter is important for calculating heat losses in heating and cooling systems of buildings, as well as when designing heat exchangers, boilers and other energy systems.
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