Current Status of Finned Tube Heat Exchanger Research

The finned tube heat exchanger is one of the most important heat transfer devices in heating systems it is also widely used in power air conditioning, chemical, and other industries. The finned tube can extend the heat dissipation area and promote the flow rate to enhance the heat transfer performance and improve the heat transfer efficiency. In order to reduce energy consumption and improve the heat transfer performance of heat transfer equipment many researchers have done a lot of research in improving the heat transfer performance of finned tube heat exchangers. Here we comb the finned tube heat exchanger from the material, process, and structure of the three aspects of the finned tube heat exchanger research development history.

Here is the content list:

• Materials

• Processing technology

• Structure

Materials

As a common heat exchanger element, finned tubes work under high temperature and pressure conditions for a long time. This requires the finned tube material with oxidation resistance, corrosion resistance and other characteristics, the common materials used for tube fins are aluminum, aluminum alloy, copper, brass, nickel, and stainless steel. In order to make the finned tube heat exchanger with good heat transfer performance, many scholars have done a lot of research on the material of the finned tube.

Processing technology

The processing technology of finned tube heat exchangers is mainly divided into two types: mechanical connection type and welding type. Mechanically connected means that the fins are fastened to the surface of the base tube by mechanical means such as sleeve, inlay, or winding. The welding type refers to the pre-designed fins combined with the base tube by welding method, mainly brazed spiral fins, high-frequency welding spiral fins tube two. The finned tube is connected by welding in order to be solid, but the finned tube connected by welding is not removable, and not mechanically connected in a flexible way; the mechanical connection is easy to produce contact heat resistance at the connection, thus affecting the heat exchanger heat transfer performance.

Structure

The structure of the finned tube has an impact on the heat exchanger's performance. In addition to the fin material and fin processing process, the finned tube structure also has an impact on the heat exchanger's heat transfer performance. The structure of the finned tube includes the number of finned tube rows, fin types, fin spacing, etc. These are the factors that affect the heat exchanger performance of the finned tube. These are the factors that affect the performance of the finned tube heat exchanger.

With the development of the economy, one of the consequences of the massive application of non-renewable energy is the depletion of resources and the gradual deterioration of the environment, energy saving and emission reduction is imminent. The heat exchanger is an important piece of equipment in the process of energy conversion and transfer, its heat transfer capacity has become a key factor affecting the size of energy consumption in heating projects, and finned tube heat exchanger is widely used in the field of heating systems, thus improving its heat transfer capacity has become one of the hot spots of today's research.