Heat Transfer and Thermal-Hydraulic Performance Evaluations of Circular Grooved Duct Considering Different Curved Baffle Configurations, Using CFD method

This study examines the application of grooved ducts within plate heat exchangers to enhance heat transfer efficiency by analyzing various baffle configurations, including vertical, single convex, dual convex, single concave, and dual concave arrangements, using the computational fluid dynamic (CFD) approach. The results indicate that curved baffles, irrespective of their particular configuration, achieve a more significant reduction in outlet temperature than vertical baffles across a range of Reynolds numbers between ۱۰۰۰ and ۶۰۰۰. Specifically, the outlet temperature for systems utilizing vertical baffles varies between ۳۳۰ K and ۳۱۶ K. In contrast, systems employing single concave baffles decrease to ۳۲۸ K and ۳۱۳ K within the mentioned Reynolds numbers. However, it is important to note that concave baffles are associated with a higher pressure drop along the duct length within different Reynolds numbers due to swirling flow pattern generation. The study highlights that convex curved baffles offer the most promising solution despite resulting in a slight reduction in outlet temperature due to their lower pressure drop at varying Reynolds numbers. These findings suggest that convex baffles provide a balanced improvement of thermal and hydraulic performance, rendering them a favorable option for enhancing system efficiency in plate heat exchanger applications.

کلیدواژه ها:

Grooved duct ، Baffle configuration ، Pressure drop ، Outlet temperature ، thermal-hydraulic performance ، CFD