Dielectric heating is a rapid method of heating and is not limited by the relatively slow rate of heat diffusion present in conventional heating by external surface contact or by radiant heating. It may be used to preheat the feed to a hot air drier.
Dielectric heating also known as electronic heating radio frequency heating and high frequency heating is the process in which a radio frequency rf alternating electric field or radio wave or microwave electromagnetic radiation heats a dielectric material.
Dielectric heating. Dielectric heating also called capacitance heating method by which the temperature of an electrically nonconducting insulating material can be raised by subjecting the material to a high frequency electromagnetic field. The definition of dielectric heating can be stated as the process of heating up material by causing dielectric motion in its molecules using alternating electric fields. What is dielectric heating.
By raising the temperature of the feed quickly and causing moisture to move to the surface it can decrease the overall drying time. All materials are made up of molecules that are composed of atoms. In drying of foods dielectric heating is usually combined with conventional heating.
Dielectric heating definition is the rapid and uniform heating throughout a nonconducting material by means of a high frequency electromagnetic field. The dielectric heating circuit diagram is shown below.