Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7053154 | International Communications in Heat and Mass Transfer | 2017 | 7 Pages |
Abstract
An improved method combining numerical simulation with multi-objective genetic algorithm (MOGA) was applied to study the flow and heat transfer characteristics of shell-and-tube heat exchanger with helical baffles (STHXsHB). It overcomes the dependence on empirical correlations. The helix angle and overlapped degree of helical baffles were chosen as optimization parameters, while the overall heat transfer coefficient K and pressure drop ÎP of STHXsHB were optimized by MOGA. The results showed that both overall heat transfer coefficient K and pressure drop ÎP varied adversely with the helix angles. The pressure drop ÎP was favorably affected by the overlapped degrees. The overall heat transfer coefficient K did not vary significantly with the overlapped degree. Three optimum configurations were obtained by the MOGA to maximize the overall heat transfer coefficient K and minimize the shell-side pressure drop ÎP. Compared with the original heat exchanger, the overall heat transfer coefficient K increased averagely by 28.3%, while the average pressure drop reduced averagely by 19.37%.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Jian Wen, Xin Gu, Mengmeng Wang, Simin Wang, Jiyuan Tu,