Finned Heat Exchanger Tube It is currently the most widely used type , in which copper tubes are used for the tubes and aluminum fins are used for the fins. The evaporator and condenser of household air conditioners basically use this type. At present, the main development of it is compactness,...
Finned Heat Exchanger Tube
It is currently the most widely used type , in which copper tubes are used for the tubes and aluminum fins are used for the fins. The evaporator and condenser of household air conditioners basically use this type. At present, the main development of it is compactness, that is, the use of small-diameter copper tubes. The small-diameter one has a higher heat transfer coefficient and a lower manufacturing cost, which is beneficial to improve the overall performance of the air conditioner.
The processing process of the element includes: tube penetration-tube expansion-welding-helium inspection, etc., among which the most important process is tube expansion. In recent years, with the application of small-diameter ones, the development of this exchanger manufacturing and processing technology includes: expansion head structure innovation, expansion rod device innovation, U-shaped tube locking device innovation and new energy-saving tube expansion Consumption reduction technology.
1) The larger the tube diameter, fin width, and fin pitch, the greater the influence of fin thickness on heat transfer performance;
2) Compared with a flat fin, the thickness of the fin has a greater influence on the heat transfer performance; the thickness of the fin has basically no effect on the heat transfer performance of different rows;
3) The fin thickness of the heat exchanger with small pipe diameter and small pipe spacing has little effect on the heat exchange performance.
