A heating element is a material or device that converts electrical energy directly into heat or thermal energy through a principle called joule heating. Joule heating is a phenomenon in which a conductor generates heat due to the flow of electric current. When an electric current flows through the material, electrons or other charge carriers collide with the ions or atoms of the conductor, creating friction at the atomic scale. This friction then manifests itself as heat. Joule's first law (Joule-Lenz law) is used to describe the heat generated by an electric current in a conductor. This is expressed as,
P = IV or P = I²R
According to these equations, the heat generated depends on the current, voltage, or resistance of the conductor material. In the design of the entire heating element, resistance is an important factor.
Silicone rubber heater silicone oil drum heating belt
Silicone rubber heater silicone oil drum heating belt
Joule heating is evident in all conductive materials of varying intensity, except for a special material called a superconductor. In general, for conductive materials, less heat is generated because charge carriers flow through easily; For materials with high resistance, more heat will be generated. Superconductors, on the other hand, allow current to flow without generating any heat. In general, heat from a conductor is classified as energy loss. The electrical energy used to drive power equipment generates unnecessary heat in the form of transmission losses and ultimately does not produce any useful work.
