The pitch of the fins mainly considers factors such as dust accumulation, dust accumulation, and easy cleaning. At the same time, it needs to strictly meet the requirements of the equipment for pressure drop. When placing, the distance between the tube and the tube is not easy to be too large, generally more than 1mm is suitable for the tube layout. In the process of heat exchange, when air flows through the finned tube heat exchanger, the front and back sides of the fins mainly participate in heat exchange. The central part of the two finned tubes only needs a small amount of radiation heat transfer, and the heat transfer effect is not obvious. Since this part has no fins and no resistance, the air simply penetrates. In the process of air heating, the unheated cold air will neutralize the heated hot air passing through the center of the fin, which reduces the effect of heat exchange. Compared with foreign finned tube heat exchangers, tubes The distance is only 0.5mm larger than the outer diameter of the fin, which shows the importance of the tube distance when the fin tube is placed.
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