翅片管换热器是指选用翅片管作为首要换热元件的换热器，当介质换热状态为油-油，水-水，气-气等等的热交换场合，往往不需要加装翅片，因为管内外两边的传热系数都差不多，加工翅片没有任何含义，反而影响了介质的活动，对于传热是不利的。当然，站在强化传热的角度，对于怎么进步翅片管换热器的传热总系数也是有值得学习的当地。当管内外传热膜系数相差较大的时分，应该选用翅片管来添加传热系数不足一面的触摸面积，以弥补传热才能不足的问题。所以，在规划翅片管换热器的时分，翅片都是加在传热系数较差的一面。如蒸汽加热空气，空气的传热才能很低，就应该加工翅片，因为管内加工翅片的难度比较高，那就在管外加工翅片。当然，空气就只能在管外活动，也契合了规划原则“管内走高温高压的介质，管外走低温低压的介质”。

Finned tube heat exchanger refers to the heat exchanger with finned tube as the primary heat exchange element. When the medium heat exchange state is oil oil oil, water water, gas gas and so on, it is often not necessary to add fins, because the heat transfer coefficients of both sides of the tube are similar, processing fins has no meaning, but affects the activity of medium, which is unfavorable for heat transfer. Of course, from the point of view of heat transfer enhancement, it is worth learning how to improve the total heat transfer coefficient of finned tube heat exchanger. When there is a big difference in the heat transfer film coefficient between the inside and outside of the tube, the finned tube should be selected to add the touch area of the side with insufficient heat transfer coefficient to make up for the problem of insufficient heat transfer ability. Therefore, in the planning of fin and tube heat exchanger, fins are added to the side with poor heat transfer coefficient. If the steam heats the air, the heat transfer of the air is very low, so it is necessary to process the fins. Because it is difficult to process the fins in the tube, it is necessary to process the fins outside the tube. Of course, air can only move outside the pipe, which is in line with the planning principle of "high temperature and high pressure inside the pipe, and low temperature and low pressure medium outside the pipe".

还有一种换热器，选用波纹管或者波节管，等于是两边都添加了触摸面积，也起到了扰流的作用，这样的换热管就合适用于油-油，水-水，气-气等等的热交换场合。这个不在本文的论述规模。

There is also a kind of heat exchanger, which uses corrugated pipe or corrugated pipe, which adds touch area on both sides and also plays a role of disturbing flow. Such heat exchange pipe is suitable for oil oil oil, water water water, gas gas and other heat exchange occasions. This is not in the scope of this paper.