What is the effect of fin thickness on the heat dissipation performance of finned tubes?

August 30, 2022

The Finned Tube Heat Exchanger not only has the characteristics of large heat transfer of the heat pipe itself, small temperature difference, small weight, small volume, and fast thermal response, but also has the characteristics of convenient installation, simple maintenance, long service life, small resistance loss, easy separation of the inlet and exhaust air channels, and no external leakage Specifically, the Finned Tube Heat Exchanger has the following characteristics. Good overall thermal conductivity. The finned tube heat exchanger completes heat conduction by means of phase change of internal working medium. The fins on the outer side of the heat pipe greatly increase the total heat conduction area and greatly reduce the convection heat transfer resistance on both sides. It is suitable for the recovery and utilization of low-grade heat energy. It is very economical. The heat conduction surfaces on both sides of the cold and hot fluid can be arranged at will.

1. The larger the pipe diameter, fin width and fin spacing of the heat exchanger, the greater the influence of fin wall thickness on the heat transfer performance; 2. Compared with the flat fin, the fin wall thickness has a greater influence on the heat transfer performance; The fin wall thickness has no effect on the heat transfer performance of the number of rows; 3. The fin wall thickness of heat exchanger with small pipe diameter and small pipe spacing has little effect on heat transfer performance.

Applying proper tube spacing and arrangement can not only improve the total heat conduction area of Finned Tubes installed per unit time, but also improve the moving characteristics, especially the heat conduction of coarse tube bundle is better than that of parallel tube bundle. If one side of the heat exchange equipment has phase change and the other side is gas phase, fins can be added on the heat conduction surface of the gas phase side to increase the total heat conduction area, which is more conducive to heat conduction.

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