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Application conditions and heat conduction process of laser welding fin tube

In order to understand the application conditions of finned tube, it is necessary to understand the heat transfer process and definition during the operation of laser welded finned tube. The heat transfer of the whole equipment refers to the process of heat transfer from hot fluid to cold fluid through solid wall, and also includes the heat transfer process of tube wall. The strength of the heat transfer process and the size of the heat transfer mainly depend on the characteristics of the convective heat transfer on both sides of the wall.

The larger the temperature difference required for the unit heat transfer of the laser welded finned tube, the greater its thermal resistance will become, which is equal to the reciprocal of the heat transfer coefficient, indicating that the greater the heat transfer coefficient, the smaller its thermal resistance. On the contrary, the smaller the heat transfer coefficient, the greater its thermal resistance. The heat transfer coefficient of the air side is smaller than that of the water side, so the heat resistance of the air side is larger than that of the water side, which becomes the main heat resistance affecting the heat transfer, making the air side become the bottleneck of the heat transfer process, without heat transfer.

In order to reduce the thermal resistance of the air side and overcome the bottleneck effect of the air side, various measures may be taken in the design of the heat exchanger to add fins on the outer surface of the air side, that is, to use the fin tube. The finned tube expands the original heat exchange area of the air side and makes up for the low heat exchange coefficient of the air side.

The application field of laser welded finned tube is expanding constantly, and its product types and specifications are increasing day by day. In order to facilitate the design and production of finned tube heat exchanger during operation, the finned tube needs to be classified during operation. The finned tube can be roughly divided into four types from the combination of use and structure: finned tube for air heat exchange and flue gas heat exchange Finned tube for heat exchange, finned tube for heat exchange with medium and cooling medium and finned tube for heat dissipation of electrical components.

The laser welded finned tube can be divided into bimetal composite rolled finned tube, integral rolled aluminum finned tube, stainless steel laser welded finned tube, spiral wound finned tube, L-shaped finned tube and plate finned tube according to its manufacturing process.
by finned tube manufacturer

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