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Radio waves (low temperature heating)


Technology Description

The use of radio waves allows the generation of heat, internally, in non-conductive materials. The object is placed between two electrodes connected with a high-frequency generator (operative frequency is in the 1 to 100 MHz range). The excitement of the molecules generates heat inside the material itself. The advantages are a rapid heat transfer, the absence of combustion products and the high speed of switching on the systems. RF systems are less expensive compared to microwave systems, but they are not as well suited for products with irregular shapes. Its potential for application includes drying, sintering, calcining, cooking, curing, pre-heating and speeding up chemical reactions.

Relevance for Net Zero

This technology can replace fuel-fired ovens in several processes, reducing on-site emissions. The use of renewable electricity can guarantee a CO2-free heating process. While used today in lower temperature heating applications, investigation of its use for higher temperature heating appears more limited.

Key Countries

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