The load intensity of the heating tube is determined according to its appearance environment, heating environment, device method, and maximum temperature of the equipment. How to make the heating tube product work under a more reasonable power and load needs to be in the design and production process Accurately determine the voltage and power and determine the cross-sectional area and length, which directly affect the life of the heating tube during use. Therefore, it is necessary to understand the load of the heating tube.
1. Heat load:
Thermal load is one of the important indicators for designing electric heating elements. Mainly refers to the heat converted by the outer surface area of the heating tube per unit time. Thermal efficiency is gradually reduced as the load decreases. The lower the load, the greater the rate at which the thermal efficiency decreases. Therefore, a suitable heat load is more conducive to the work of the equipment. From an economic point of view, it can save costs.
2. The expression method of heat load intensity:
1. Appearance load: suitable for spiral heating elements and strip heating elements. Generally, the surface load of the metal tubular electric heating element is 1-25/W.cm2.
2. Area current: suitable for strip heating elements.
3. Heat load intensity of heating tube:
1. The corrosive medium should be low in geothermal load according to actual use.
2. The shape of electric heating materials: generally can be divided into strips and wires. The heat load of the strip is 20%-50% higher than that of the wire. Generally, the heating wire in the heating tube uses a spiral wire.
3. The heat load is also different: generally can be divided into low temperature, high temperature, ultra high temperature, the higher the temperature resistance, the greater the heat load. Alloy composition: according to the composition of the heating wire selected inside the heating tube.
4. Maximum operating temperature: The higher the operating temperature of the heating element, the lower the relative thermal load. vice versa.
5. Installation method: The heating tube should be used as an embedded electric heating element with a lower heat load intensity.
