Generally speaking, the tube distance and plate height of stainless steel tube heat exchangers will affect the finning ratio. At the same time, the finning ratio has a great relationship with the film heat transfer coefficient of the medium inside and outside the tube. If the difference in heat transfer coefficient between the inner and outer membranes of the tube is large, a finned tube with a relatively large finning ratio should be selected, such as steam heating air. When there is a phase change in the medium on one side, the difference in heat transfer coefficient will be larger.
       For example, in order to better realize the exchange of hot and cold air, when the hot air decreases below the dew point, it is recommended to use a stainless steel tube heat exchanger. In the case of heat exchange between air and air without phase change, or heat exchange between water and water, bare tubes are usually more suitable. Of course, low-finned tubes can also be used, because the heat transfer coefficient is weak at this time, and strengthening any one side has a specific effect. However, the effect of excessive finning ratio is not significant. It is better to strengthen the contact area between the inside and outside of the tube at the same time. Threaded tubes or fluted tubes can be used for the equipment.
       Factors such as dust accumulation and cleaning should be taken into consideration when designing the spacing between devices, and should also strictly meet the pressure drop and other requirements of the equipment. When arranging, the distance between tubes should not be too large. Generally >1mmThe above is suitable for piping.
       In fact, there will be specific radiation heat transfer in the center between the two stainless steel tube heat exchangers, but it is very small. Since there are no fins in this part, there is no resistance and air can easily penetrate. During the air heating process, the unheated cold air will neutralize the heated hot air passing through the center of the fins, which in turn reduces the heat exchange effect. Compared with foreign tube distances, it is larger than the outer diameter of the fins.0.5mm, it can be seen that the tube distance is important when finned tubes are arranged.