HEAT EXCHANGER

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 A heat exchanger is a system used to transfer heat between a source and a working fluid. Heat exchangers are used in both cooling and heating processes. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. Heat Exchangers are used in Refrigeration, Air Conditioning, Sewage Treatment, Power Stations, Chemical Plants and in many other places. Heat is transferred by conduction through the exchanger materials which separate the mediums being used. A shell and tube heat exchanger passes fluids through and over tubes, where as an air cooled heat exchanger passes cool air through a core of fins to cool a liquid. 

There are many types of Heat Exchangers which includes mainly – Shell & Tube, Plate Type Heat Exchanger, Air Cooled Heat Exchanger, Plate Fin Type, Finned Tube Type and so many.