Heat transfer enhancement using different baffle Spacing arrangement

Abstract

To enhance the heat transfer rate the feature of a shell and tube heat exchanger was developed by considering the baffle spacing and baffle cut.The research in this project was carried by manual calculations and was performed for a cross-flow heat exchanger with water as tube side fluid and methyle alcohol as shell side fluid with four different numbers of baffle spacing and 35% of baffle cut. Shell and tube heat exchangers in their various construction modifications are probably the most widespread and commonly used basic heat exchanger configuration in the process industries. There are many modifications of the basic configuration which can be used to solve special problems. Baffles serve two functions: Most importantly, they support the tubes in the proper position during assembly and operation and prevent vibration of the tubes caused by flow-induced eddies,and secondly, they guide the shell-side flow back and forth across the tube field, increasing the velocity and the heat transfer coefficient. Our designed baffle spaces are : For case A: 380 mm For case B: 420 mm For case C: 470 mm For case D: 520 mm In this project we acquired sell side calculations using Kern method and after observing the shell side calculations,the overall heat transfer coefficient was decreased by 37.78% .