Load range of electric tubular heater
The load intensity of the electric heating tubular is determined according to its external environment, heating environment, device method, and the maximum temperature of the device. How to make the electric tubular heater product work more reasonably at a suitable power and load, not only in the In the design and production process, the accurate judgment of voltage and power to determine the cross-sectional area and length also determines whether high thermal efficiency is obtained. The use of the process also relates to the life of the electric heating element. Therefore, it is necessary to know the load of the electric tubular heater.
I. Thermal 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 electric tubular heater in a unit time. Thermal efficiency is gradually reduced as the load decreases. The lower the load, the faster the thermal efficiency decreases. Therefore, using a suitable heat load is more conducive to work in the equipment, and economically, it can save costs.
Second, the expression method of heat load intensity:
1. Appearance load: suitable for spiral electric heating elements and band electric heating elements. The general surface load of metal tubular electric heating elements is 1-25 / W.cm2.
2. Area current: suitable for strip-shaped electric heating elements.
3. Heat load intensity of electric tubular heater:
1. The corrosive medium should have low geothermal load according to actual use.
2. Shape of electrothermal material: Generally it can be divided into strip and wire. The heat load of the strip is 20% -50% higher than that of the wire. Generally, the heating wire in the electric heating element is 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: The composition of the electric heating wire used in the electric heating tubular heater is different.
4. Maximum use temperature: The higher the use temperature of the heating element, the lower the relative heat load selected. vice versa.
5. Installation method: The electric heating tube should be selected as a low-temperature electric load as the embedded electric heating element.