翅片管热交换器的优势

A finned tube adds a lot of heat transfer surface area for the fluid outside the tube, which is usually air or some other gas for a fin tube exchanger.

使用翅片管交换器对空气热交换器尤其适用。

Introduction

For a liquid-liquid heat exchanger, the use of a finned tube isn't normally needed, because the heat transfer coefficient for both sides of the heat transfer surface is relatively high. For an air heat exchanger, however, where one of the fluids is air or some other gas, the air side heat transfer coefficient will be much lower, so additional heat transfer surface area, as in a fin tube exchanger is very helpful. The overall flow pattern for a finned tube exchanger is often crossflow, but it can also be counterflow or parallel flow.

Finned Tube Heat Exchangers

General Configuration of a Fin Tube Exchanger

翅片管热交换器通常具有与它们外侧附接的翅片的管。通常会有流过管的内部的液体，或者在管外部流动的一些其他气体，其中由于翅片管引起的附加传热表面积增加了传热速率。对于十字流翅片管交换器，翅片通常是圆形或正方形的径向翅片，如本节中的图片所示。

Most finned tube heat exchangers are crossflow, using finned tubes somewhat like the upper pictures. For a counterflow or parallel flow fin tube exchanger, the fins should be longitudinal instead of radial, as shown in the lower diagram at the left. Finned tubes may be used as internal tubes in an enclosed heat exchanger, but in many cases with an air heat exchanger, the air flows through an open heat exchanger as shown in the next section, where some typical applications of finned tube heat exchangers are shown and discussed.

Examples of Fin Tube Heat Exchangers

翅片管热交换器用于各种家用应用和工业换热器。类似于用于空调单元的蒸发器线圈的空气热交换器通常是翅片管热交换器。另一个常见的翅片管空气热交换器是汽车散热器。汽车散热器的目的是将管中的热水冷却，空气通过横流。空调蒸发器线圈具有冷却通过它的空气的目的。

A fin tube heat exchanger can be used as an industrial heat exchanger also. An application that has seen widespread expansion recently is 'dry cooling' for steam power plants. This consists of using an air cooled condenser instead of a water cooled condenser. Interest in dry cooling for steam power plants has increased because of concern about the amount of water use and thermal effects on water bodies from the traditional cooling systems, 'once through cooling' and 'closed system - cooling tower cooling.