WHATS INSIDE AN ELECTRICAL HOT WATER ELEMENT
In this whats inside Youtube video we explore whats inside a heating element. Inside a typical heating element is much like a lamp filament a coil or strip of wire that gives off heat when electric current flows through the wire encounters resistance, resulting in heating of the element. The element then converts the electrical energy passing through it into heat through the process of resistive heating. The heat radiates out heating the water, air of what surrounds it.
Heating element wire are generally made from nickel or iron. Nickel-based heating element are usually a mixture of metals to make nichrome. Nichrome is most commonly the material used for heating elements wire because:
– It has a high melting point of 1400°C
– it doesn’t oxidise even when at high temperatures
– it minimal expansion when it is heated
– It has a fairly stable resistance when hot or cold
Types of heating elements
There are lots of different kinds of heating elements, the size and shape of a heating element is generally governed by the dimensions of the appliance it has to fit into the area that it needs to produce the heat.
Hair straighteners and curling irons have short coiled elements because they need to produce heat over a small area.
Electric room heaters have long bar elements because they need more surface area to heat the most amount of air to heat the room.
Electric stoves and cook tops have coiled heating elements the size of each element has more or less coils depending on the plate size stove, cook tops elements are generally covered by metal, glass, or ceramic plates.