twisted tube(Twisted tube)

Spiral flat tube（Twisted tube）It's SwedenAlardsThe company first proposed that the United StatesKoch Heat Transfer Company, LPA strengthened heat exchange tube that has been improved by the company.

Principle of Enhanced Heat Transfer in Spiral Flat TubeSpiral flat tube structure and manufacturing
The characteristic of the spiral flat tube structure is that any cross-section of the heat exchange section of the tube is elliptical. When assembled into a heat exchanger, it can be a mixed tube bundle (i.e. a mixture of spiral flat tubes and smooth tubes) or a pure spiral flat tube bundle.
The manufacturing process consists of“Pressure deviation”and“distort”Two forming processes are completed, and the cross-section of the tube is similar to an ellipse. The length axis ratio of the ellipse is determined based on the flow velocity design of the heat exchange tube tube and shell side. When the flow rate of the tube side is low, the length axis ratio can be increased to reduce the flow cross-section and increase the flow velocity.

The unique structure of the spiral flat tube enables the fluid on both the tube and shell sides to move in a spiral motion, enhancing the turbulence intensity. The overall heat transfer coefficient of spiral flat tube heat exchanger is higher than that of ordinary heat exchanger40%And the pressure drop is almost equal.

Advantages of Spiral Flat Tube Heat Transfer

The seamless steel pipe used to manufacture spiral flat tube heat exchange tubes should be a single tube and splicing is not allowed. The materials of commonly used steel pipes are shown in the table

Spiral flat tube size parameters

Figure Basic Dimensional Parameters of Spiral Flat Tube

Note: The above table shows the basic parameters of standard spiral flat tubes. If there are special requirements, spiral flat tubes can be manufactured according to the required lead and long axis values.

Application scenarios of spiral flat tube
Spiral flat tube heat exchangers have been further improved and developed in recent years. They are more reliable and effective than other types of heat exchangers, and can be used in almost all systems that require the use of shell and tube heat exchangers. self1984Since, thousands of spiral flat tube heat exchangers have been manufactured and sold worldwide, which can be used for gas treatment-Gas, liquid-Liquid, liquid-The process of gas heat exchange is widely used in various industries such as chemistry, petroleum, food, papermaking, electricity, metallurgy, mining, and urban heating.