What is the Finned Tube Heat Exchanger?
The Finned Tube heat exchanger is mainly composed of a number of finned tube arrangements, with metal fins on the inside or outside of the metal tube in the shape of spiral, star, ring and so on. The finned tube heat exchanger is mainly used for heating or cooling of gases, the common finned tube heat exchanger is the air cooler in the production of oil refineries. This type of heat exchanger can significantly improve the effect of gas heat transfer and reduce the volume and metal material of the heat exchanger. However, it has a complex manufacturing process and high cost. The fluid flowing through the fin side is required to be clean, as cleaning is difficult.
What is the usage of Air To Air Heat Exchanger?
Fin tube heat exchanger is mainly used when the two sides of the fluid heat transfer coefficient difference is big, the heat transfer coefficient of the small fluid side with fins, in the operation to expand the heat transfer area and promote fluid perturbation to reduce the heat transfer thermal resistance, effectively increasing the heat transfer coefficient, thereby increasing the heat transfer.
The main purpose of finned tube heat exchanger is to strengthen the heat transfer, the fins' heat transfer capacity is relatively weak, the main operation is to strengthen the heat transfer by increasing the heat transfer area. For example, the heat of air and water is better, and the heat transfer coefficient of the air side is about 100 while the water side can reach 3000~4000 or even higher. This time in the air side with fins on the heat transfer can be beneficial to reduce the size of the equipment, special fin structure can also achieve the purpose of water saving.
The general finning ratio can be from about 2 of the threaded tube to about 23 of the high fins, if the difference between the internal and external heat transfer coefficients is not obvious, that the strengthening of the fins simply does not work, with ordinary light tube can be.
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