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Heat exchangers are one of the most used and important devices in modern industry, as well as in residential sector. There is no ideal heat exchanger. As a result, there are many types of heat end mass exchangers. The design differs according to the capacity, temperature, pressure, type of work fluids and other factors. As several different types of heat exchangers can be used for same purpose, there is need for adequate choice. In this paper, design criteria, types, materials and usage of heat and mass exchangers is presented. Special attention was given to the most common – shell-and-tube heat exchangers and relatively novel – matrix heat exchangers, both thoroughly studied, experimentally and numerically.
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