一、前言 在气—气传热过程中,与通常所采用的间隔式换热器相比,热管换热器具有结构紧凑、流体阻力小的特点。文献报导,近年来这种换热设备已越来越广泛地用于化工、炼油、轻工、钢铁等行业的工业炉以及民用锅炉,用来予热燃料气、燃料油或煤的助燃空气。 用于空气予热的热管结构如图1所示。热管中所用的工质通常是水。加热段和冷却段壳体的外侧装有翅片,用来强化管表面的传热。 I. Introduction In the process of gas-gas heat transfer, the heat pipe heat exchanger has the advantages of compact structure and small fluid resistance as compared with the commonly used spacer heat exchanger. Reported in the literature, in recent years, this heat transfer equipment has been more widely used in chemical, oil refining, light industry, steel and other industries, industrial furnaces and civilian boilers, used to preheat fuel gas, fuel oil or coal combustion air. Heat pipe for air preheating structure shown in Figure 1. The working fluid used in heat pipes is usually water. Fins are provided on the outside of the heating section and the cooling section housing to reinforce heat transfer on the pipe surface.