Based on the thermohydraulic calculation model verified in this study and Non-dominated Sorted Genetic Algorithm-II (NSGA-II), a multi-objective configuration optimization method is proposed, and the performances of shell-and-tube heat exchanger with disc-and-doughnut baffles (STHX-DDB) and shell-and-tube heat exchanger with segmental baffles (STHX-SB) are compared after optimization.The results show that, except in m02q3ll/a apple watch the high range of heat transfer capacity of 16.5–17 kW, the thermohydraulic performance of STHX-DDB is better.Tube bundle diameter, inside tube bundle diameter, number of baffles of STHX-DDB and tube bundle diameter, baffle cut, number of baffles of STHX-SB are chosen as design parameters, and heat transfer capacity maximization and shell-side pressure drop minimization are considered as common optimization objectives.Three optimal configurations are obtained chiefs wine glass for STHX-DDB and another three are obtained for STHX-SB.
The optimal results show that all the six selected optimal configurations are better than the original configurations.For STHX-DDB and STHX-SB, compared with the original configurations, the heat transfer capacity of optimal configurations increases by 6.26% on average and 5.16%, respectively, while the shell-side pressure drop decreases by 44.33% and 19.
16% on average, respectively.It indicates that the optimization method is valid and feasible and can provide a significant reference for shell-and-tube heat exchanger design.