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Air cooler structure

High-quality air coolers mainly by the tube bundle, fan and frame 3 parts. Tube bundle includes heat transfer tube, tube box, side beams and beams. It can be horizontal, vertical and inclined top (Homo-type) layout of the three basic forms. Among them, the horizontal layout heat transfer area, uniform air distribution, heat transfer effect; inclined top arrangement, the fan installed in the herringbone central space, small footprint, compact structure. In order to counteract the effect of lower heat coefficient on the air side, tubes with fins on the outer wall of the light pipe are usually used. Finned tube as a heat pipe, you can expand the heat transfer area. The finned tubes are arranged in layers, and the ends of the finned tubes are welded or expanded to the tube box. Pipes are generally 3 to 8 rows. Tube bundle size up to 12 meters. The outer diameter of the light pipe is usually 25 mm and 38 mm. The fin height is generally 12 to 15 mm and the tube width is 100 to 3000 mm.

Finned tubes are the core components of air coolers and their form and materials directly affect equipment performance. The pipe can be made of carbon steel, copper, aluminum and stainless steel; fin material according to the use of the environment and manufacturing processes to determine, most of the use of industrial pure aluminum, anti-corrosion requirements are high or in the case of special manufacturing processes also use copper Or stainless steel. Fin can be arranged horizontally or vertically. The basic form of finned tube: around the sheet, insert type, roll type, sleeve type, welding slice, oval tube, turbulence (including spoke, grooved and corrugated, etc.). The main structure of the tube flange, pipe plug and manifold. The former generally used for low pressure, the latter two for high pressure. In order to adapt to the thermal expansion of the tube bundle, one end of the tube box is not fixed, allowing displacement along the tube length direction. Fans are usually axial fans.

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