Chapter: Electric Energy Generation and Utilisation and Conservation - Industrial Heating and Welding

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Electric Heating Introduction

Dielectric heating (also known as electronic heating, RF heating, high-frequency heating) is the process in which radiowave or microwave electromagnetic radiation heats a dielectric material. This heating is caused by dipole rotation.

Electric Heating Introduction:

 

Heating required for:

(i) Domestic purpose:

·           Hot plates or cooking

·           Immersion heaters for water heating

·           Room heaters

·           Electric irons

·           Electric toasters

·           Pop corn plants etc

·           Electric ovens or bakeries

 

(ii) Industrial purpose:

·           Melting of Metals

·           Moulding of glass

·           Enamelling of copper wires

·           Heat treatment processes

·           Baking o insulators

·           Welding etc

The use of electically produced heat is always economical proposition on account of the present low cost and availability of electrical energy.

 

Practically all heating requirements can be must be met by some form of electric heating equipment.

 

Electric heating is any process in which electrical energy is converted to heat. Common applications include heating of buildings, cooking, and industrial processes. An electric heater is an electrical appliance that converts electrical energy into heat. The heating element inside every electric heater is simply an electrical resistor, and works on the principle of Joule heating: an electric current through a resistor converts electrical energy into heat energy. Alternatively, a heat pump uses an electric motor to drive a refrigeration cycle, drawing heat from a source such as the ground or outside air and directing it into the space to be warmed.

 

Definition

 

Dielectric heating (also known as electronic heating, RF heating, high-frequency heating) is the process in which radiowave or microwave electromagnetic radiation heats a dielectric material. This heating is caused by dipole rotation.

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