what is heat exchanger

Heat transfer is considered as the basics of chemical engineering, and most important heat transfer equipment is the heat exchanger. A chemical engineer knows it very well that what is heat exchanger. A heat exchanger is the equipments used for effective transfer of heat between two fluids. These fluids are separated by means of solid wall, to avoid their mixing. The heat exchangers are the widely used equipments in chemical and process industries, So why a chemical engineer must have firm grip on heat exchangers designs, and their working. Most common application areas of them are boilers, condensers, intercoolers, preheaters , etc.

The heat exchanger performance is calculated by

                                                                     n = Q / Qmax 

  

where,
           n        =   performance or efficiency

           Q       =   actual rate of heat transfer

           Qmax    =   maximum rate of heat transfer

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