The influence of the distribution of electric wire on the temperature of electric heating tube

Jun 11, 2018

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Whether the surface temperature of the heating tube is uniform or not is an important technical

measure to measure the quality of the heating tube. It will directly affect the practical effect,

life and safety of the electric heating pipe. The main reason for the difference in the surface

temperature of the heating tube is that the unevenness and eccentricity of the inside of the

heating tube eventually lead to uneven temperature.

① uneven density, refers to the electric wire in the electric tube in a section of the

arrangement is very close spacing, another arrangement of the spacing is very loose or even

pulled into a straight line, this time the heating tube will appear serious temperature uneven.

If the tube is not evenly arranged in the heating wire, the length of the spiral wire per unit

length of the spiral number of many, the results of this section of the power will increase with

the number of turns increased, the phenomenon of local power increases, resulting in uneven

temperature, The power of the unit length is small.

The surface load is the power per unit area on the surface of the heat generation, and the

local surface load increases as a result of the local power rise. The surface load is closely

related to the surface temperature, the surface load increases, the temperature of the surface

of the heating tube increases, the surface load decreases, and the temperature of the surface of

the heating tube decreases.

② the so-called eccentricity refers to the central axis of the spiral electric wire deviation

from the central axis of the electric heating tube, so that the heating wire too close to the

side of the heating tube wall, and the other side has a greater distance, consider the heat

transfer medium heat Coefficient and the thickness of the two sides of the heat transfer medium

is inconsistent, resulting in the tube surface temperature is not uniform.

Eric Xie

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