Infrared (IR)
There are three modes for heat/thermal transfer :
Conduction : Energy transfer from a hot part of one object to a colder part of the same object
Convection : Energy transfer by contact between a gas or a solid in motion and a gas, a liquid or a solid
Radiation : Contactless energy transfer from an emitter to an object
InfraRed technology belongs to the family of thermal radiation.
IR wavelengths
The wavelength is determined by the Wien law : λMax = 2.8978 . 10-3 / T (°K)
Choosing the wavelength is crucial in getting the best performance but also in the process type envisioned.
Comparison convection/radiation
 |
Convection :
Low power density |
Radiation : High power density |
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| E = β(Tair – Tproduct) | E = a(T4transmitter – T4product) |
