| Summary: | Heat exchanger (HX), a device used for transferring energy in the form of heat among two or more fluids of varying temperatures that are in contact thermally with each other. Most adopted heat transfer devices in industries are Shell and Tube Heat Exchangers (S&T HXs) therefore they are most common in many industrial applications such as HVAC, air treatment, refrigeration, and space heating and are also used in power plants, chemical plants, and Process Industries. This paper presents an analysis of research on shell and tube type HX, various correlations of its performance analysis, and improving heat transfer by changing various parameters, such as the effect of the diameter of the Shell, length of the tube, pitch, tube passage, baffle clearance, baffle cut, on the heat transfer coefficient (htc), loss of pressure on the side of the shell with the triangular, square pitch.
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