A REVIEW ON SHELL & TUBE HEAT EXCHANGER BY CHANGING GEOMETRICAL SHAPE OF BAFFLES

THERMAL ENGINEERING

A Shell and tube heat exchangers are widely used today in the industries like petrochemicals, pharmaceutical, oil and refineries, according to one survey 40% of heat exchangers of the world are shell and tube heat exchangers due to its high pressure application it is more suitable in the field of oil & petrochemical application, the main components of Shell and tube heat exchangers are Shell, Tubes, Tubesheet, Baffles etc; with passing of time there are changes done in the design of shell and tube heat exchangers the purpose of this research is about to Study the geometry of baffles and change the geometry of baffle and improving the heat transfer co-efficient by reducing the shell side pressure drop, modified baffle geometry is able to create more turbulence in the shell side flow and improve the performance of shell and tube heat exchanger with suitable baffle spacing and angular arrangement of baffle angle, helical baffle geometry is introduced which gives less pressure drop then segmental baffle geometry as the obstruction of flow is less in helical baffle. by reducing pressure drop shell side pumping power can be reduced so the overall efficiency of the heat exchanger can be increased, different baffle geometry are studied in this review which gives less pressure drop and higher heat transfer co-efficient.

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