نوع مقاله : مقاله علمی
عنوان مقاله English
نویسنده English
Shell-and-tube heat exchangers are widely used in energy, chemical, and HVAC industries due to their mechanical robustness, high thermal efficiency, and ability to withstand elevated pressures and temperatures. This study aims to enhance heat transfer performance while minimizing pressure drop by numerically modeling and optimizing the geometry of helical grooves inside the tubes of such heat exchangers. Thermo-hydraulic analysis was carried out using CFD simulations in COMSOL Multiphysics. Model validation against well-established empirical correlations confirmed the accuracy of the baseline model, with a deviation of less than 6%. The results show that increasing the depth and width of the helical grooves can enhance the heat transfer coefficient by up to 23%, although at the expense of a 20% rise in pressure drop. Finally, the developed model was optimized using a genetic algorithm. The optimization results indicate that the optimal geometry—groove depth of 2 mm, width of 1.5 mm, helix angle of 40°, and 20 grooves—improves the overall thermal performance by 25% compared to smooth tubes.
کلیدواژهها English
علم و فناوری در مهندسی مکانیک