Air-Cooled Heat Exchanger , Froced Draft Type Air Cooler, API 661 design, Power Plant Application

Yuhong Group forced draft type Air-Cooled Heat Exchanger is the most common style of air-cooled heat exchanger, the design positions the fans beneath the process tube bundle allowing easy access to all mechanical components.

Air Cooled Heat Exchanger‘s tube bundle is an assembly of tubes, headers, side frames, and tube supports as shown in Figure 2. Usually the tube surface exposed to the passage of air has extended surface in the form of fins to compensate for the low heat transfer rate of air at atmospheric pressure and at a low enough velocity for reasonable fan power consumption. The prime tube is usually round and of any metal suitable for the process, due consideration being given to corrosion, pressure, and temperature limitations. Fins are helical or plate type, and are usually of aluminum for reasons of good thermal conductivity and economy of fabrication. Steel fins are used for very high temperature applications.

Air-Cooled Heat Exchanger Header type :

Air-Cooled Heat Exchanger Plenum:
The air plenum is an enclosure that provides for the smooth flow of air between the fan and bundle. Plenums can be box type or slopesided type. The slopesided type gives the best distribution of air over the bundles, but is almost exclusively used with induced draft because hanging a machinery mount from a slopesided forced draft plenum presents structural difficulties.