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A heating element is a device used for conversion of electric energy into heat, consisting of a heating resistor and accessories. [1] Heat is generated by the passage of electric current through a resistor through a process known as Joule heating .
Early electric stoves were unsatisfactory due to the cost of electricity (compared with wood, coal, or city gas), limited power available from the electrical supply company, poor temperature regulation, and short life of heating elements. The invention of nichrome alloy for resistance wires improved the cost and durability of heating elements. [10]
An electric convection heater. In a convection heater, the heating element heats the air in contact with it by thermal conduction.Hot air is less dense than cool air, so it rises due to buoyancy, allowing more cool air to flow in to take its place.
Extra features on toaster ovens can include: Heating element control options, such as a "top brown" setting that powers only the upper elements so food can be broiled without heat from below. Multiple shelf racks – Having options for positioning the oven shelf gives more control over the distance between food and the heating element.
The first electric stoves used heating elements made of high-resistance metal to produce heat. The stovetop (range) surface had one or more circular heating elements, insulated with compressed magnesia and sheathed in a spiral metal tube. Heating elements for the oven are of similar construction but an elongated loop to distribute heat.
A halogen oven, halogen convection oven, or halogen cooking pot is a type of oven that utilizes a halogen lamp as its heating element.Halogen ovens are often noted for being more energy-efficient than a conventional electric oven due to their more effective heating of food and faster cooking times.