Foam Cutter Course Presentation

Electrical heating: When current passes through a conductor, the conductor heats up. This heat generated by the current is called electrical heating. The phenomenon of converting electrical energy into internal energy by heat is called electrical heating.

Experiments have proven that under the condition of equal resistance and current, the longer the time of electricity, the more heat generated by the current.
Modern electric heating has developed into an industry, which is known as the electric heating industry (also known as the electric heating industry).

Energy conversion efficiency refers to the ratio of the usable energy output by an energy conversion device to the input energy. The usable energy output could be electrical energy, mechanical work, or heat. There is no uniform definition of energy conversion efficiency, which primarily depends on the extent to which the output energy is usable.
In general, the energy conversion efficiency is a dimensionless number between 0 and 1, and it is sometimes also expressed as a percentage. The energy conversion efficiency cannot exceed 100%, so the concept of a perpetual motion machine does not exist. However, devices like heat pumps, which move heat from one place to another, do not involve energy conversion, and their performance coefficient (Coefficient of performance) often exceeds 100%.
Energy exists in many forms, and the sources and uses of various forms of energy are not the same. In order to facilitate the use of energy, it is necessary to convert energy between different forms.
Energy conversion efficiency refers to the ratio of the usable energy output by an energy conversion device to the input energy. The usable energy output could be electrical energy, mechanical work, or heat. There is no uniform definition of energy conversion efficiency, which primarily depends on the usable degree of the output energy.
In general, energy conversion requires certain equipment, and due to the limitations of the equipment itself, it is impossible to convert all the energy into the energy people need.
Analogous to the mechanical efficiency η = W useful / W total × 100%, the total energy consumed before the conversion is the total work, the useful energy after the conversion, and the heat loss is the additional work. The so-called energy conversion efficiency is the ratio of the energy (useful energy) that people need to obtain to the total energy consumed.
The efficiency of energy conversion = the energy utilized effectively / the total energy consumed × 100%