The Influence Of The Surface Load Of The Heating Wire
Some customers are unclear about how to understand the surface load of the heating wire. They only know that the surface load value of the heating wire determines the amount of heat generation of the heating wire, the speed of the heating time, and the life of the heating wire.
The surface load of the heating wire refers to the power value shared by the heating wire per unit area, marked with the symbol ω, and the unit is W/cm2.
For the high temperature resistance furnace, when the power is the same, the surface load is selected higher, which means that the size of the selected heating wire can be smaller and the material can be saved. However, the surface load is inversely proportional to the service life of the heating wire. If the surface load is selected too high, the service life will not only not save materials but waste materials. Therefore, the correct selection of surface load is an important factor in the rational use of electrothermal materials.
The selection of surface load is related to the heating wire's material, specifications, structure, operating temperature, and heat dissipation conditions. It is also closely related to the atmosphere around the heating wire, the material of the supporting element, and the frequency of heating and cooling during use. The allowable surface load of the heating wire elements used in industrial resistance furnaces and civil electric heaters is very different due to different uses. Therefore, it is impossible to give a universally applicable value.
