An after cooler is a mechanical type heat exchanger designed to remove the heat produced by compressor, thus reducing the temperature of the compressed air so that it can be used in downstream equipments.
Irrespective of the type of compressor being used, the compressed air coming out from that compressor is bound to be hot. High-temperature air has adverse effect in most downstream instruments as it reduces effect of equipment lubrication and sealing materials. This hot air also contains large quantities of moisture vapour which, as it condenses, produce liquid and leads to rust, scale build-up.
The two most regularly used types of after coolers are air cooled type and water cooled type.
ANNAIR Air-cooled after coolers utilise atmospheric air to cool the hot compressed air. The hot compressed air enters to after cooler and travels through vertical arranged spiral fin tubes, while ambient air is forced over the cooler by a motor-driven axial fan. The ambient air removes heat from the compressed air. Liquid condensate will form as the compressed air cools. The condensate liquid is accumulated at the bottom side of the after cooler and can be removed by either a manual or auto drain valve.
Salient Features
- Advanced technology designs to maximize heat transfer with minimum pressure drop.
- Compact design compared to conventional fan and tube designs provides smaller footprint.
- Size from 50 CFM to 2500 cfm
- Durable spiral fin tube design saves space and minimizes energy usage.
- Vertical air flow ensures condensate liquid accumulated at the bottom
- Energy efficient liberally sized axial fans used, suitable for harsh working enviorments.
ANNAIR water -cooled after coolers use water (either from cooling tower, water tank or water chiller) to cool the hot compressed air.ANNAIR uses Shell and Tube Heat Exchanger/After cooler for best results. This after cooler consists of a shell with a bundle of tubes fitted inside. Typically the compressed air flows through the tubes in one direction as water flows through the shell side in the opposite direction (counter-flow).The advantages of using water as the cooling media is there little seasonal fluctuation in temperature and can supply quite a cold water, thus reduces the temperature of compressed air to a great extent The condensate liquid can be removed by the moisture separator and drain valve.
Salient Features
- Advanced technology designs to maximize heat transfer with minimum pressure drop.
- Compact design, vertical and horizontal options are available.
- Size from 50CFM to 2500 cfm
- Robust powder coated Steel shell and copper tubes are used
- Liberally sized tubes and shell ensures better heat exchange
- Suitable for harsh environments.