What Is A Heat Exchanger

 What Is Heat Exchanger  

    A heat exchanger is a device for transferring heat between a solid object and a fluid or between two or more fluids. The fluids can be separated by solid walls to prevent mixing or they can be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, oil refineries, natural gas processing and wastewater treatment. A typical example of a heat exchanger is found in internal combustion engines where circulating fluid, referred to as engine coolant, flows through the radiator coil and air flows through the coil, cooling the coolant and heating the incoming air. Another example is a heat sink, which is a passive heat exchanger that transfers heat generated by an electronic or mechanical device to a fluid medium, typically an air or liquid coolant.