How to Correctly View and Understand the Load of Electric Heating Tubes

How to Correctly View and Understand the Load of Electric Heating Tubes

The load intensity of an electric heating tube is determined based on its external environment, heating environment, installation method, and the maximum temperature of the equipment. How to make the electric heating tube product work more reasonably at the appropriate power and load not only requires accurate judgment of voltage and power during the design and production process to determine the cross-sectional area and length, but also determines whether high thermal efficiency is achieved, The lifespan of the electric heating tube is also related to its use. Therefore, it is necessary to understand the load of electric heating tubes.

1、 Heat load:

Heat load is one of the important indicators for designing electric heating components. Mainly refers to the heat converted by the surface area of an electric heating tube per unit time. The thermal efficiency gradually decreases with the decrease of load. The lower the load, the faster the thermal efficiency decreases. Therefore, adopting a suitable heat load is beneficial for working more reasonably in the equipment, and from an economic perspective, it can save costs.

2、 The expression method of heat load intensity:

1. External load: Suitable for spiral and ribbon heating elements. Generally, the external load of metal tubular electric heating elements is between 1-25/W.cm2.

2. Area current: Suitable for ribbon heating elements.

3、 Electric heating pipe thermal load intensity:

1. The selection of corrosive media should have a low geothermal load based on actual use.

2. The shape of electric heating materials can generally be divided into strip and wire. The heat load of the strip is 20% -50% higher than that of the wire. Generally, the electric heating wire inside the electric heating tube uses spiral wire.

3. The heat load is also different. Generally, it can be divided into medium to low temperature, high temperature, ultra-high temperature, and the higher the temperature resistance, the greater the heat load. Alloy composition: Depending on the composition of the electric heating wire selected inside the electric heating tube.

4. Maximum operating temperature: The higher the operating temperature of the heating element, the lower the relative selected heat load. The reverse is also true.

5. Installation method: As an embedded electric heating element, the electric heating tube should be selected with a lower heat load intensity.

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