ABSTRACT
A heat exchanger is a heat transfer device that is used for transfer of internal thermal energy between two or more uids available at different temperatures. In most heat exchangers, the uids are separated by a heat transfer surface, and ideally they do not mix. Heat exchangers are used in the process, power, petroleum, transportation, air-conditioning, refrigeration, cryogenic, heat recovery, alternate fuels, and other industries. Common examples of heat exchangers familiar to us in day-to-day use are automobile radiators, condensers, evaporators, air preheaters, and oil coolers. Heat exchangers can be classied into many different ways.
