# Relationship between surface load and surface temperature of heating pipe in static air medium

- Aug 22, 2020-

Relationship between surface load and surface temperature of heating pipe in static air medium：

The surface temperature of the electric heating tube is determined by the electric power per unit area and the properties of the heating medium around the heating tube. Today, we first analyze the relationship between the surface load and the surface temperature of the heating tube in the static air medium.

Take an electric heating tube with an outer diameter of ψ 12mm, and use the surface temperature of No.10 steel to compare with Junjun's electric heating pipe to do the experiment. In order to ensure the accuracy of temperature measurement, nickel aluminum couple is used to weld directly on the surface of heating pipe (other experiments prove that the surface temperature of heating rod measured by this method is relatively correct). The heating rod is electrified and heated in the still air medium, and the power on the unit surface of the heating rod is 0.1-6w/cm2, and the temperature measured on the surface is 70-600 ℃.

Through the test, we can get that the relationship between the surface load and the surface temperature of the heating pipe in the static air medium is in direct proportion

In general static air medium,

The surface load is 1W / cm2, and the surface temperature of the heating rod reaches 300 ℃

The surface load is 2W / cm2, and the surface temperature of the heating rod reaches 400 ℃

The surface load is 3W / cm2, and the surface temperature of the heating rod reaches 500 ℃

The surface load is 4W / cm2, and the surface temperature of the heating rod reaches 580 ℃

The surface load is 5W / cm2, and the surface temperature of the heating rod reaches 630 ℃

The surface load is 6W / cm2, and the surface temperature of the heating rod reaches 680 ℃

The above values are only approximate temperature, for reference only.

According to the data obtained, the power required for the required temperature of the electric heating tube can be calculated in the still air medium.