Design and Optimization of Cross-Corrugated Triangular Ducts with Trapezoidal Baffles Based on Response Surface Methodology and CFD

Caihang Liang, Rui Zhang, Chaojian Mao, Yanfang Dong (), Xiong Yao, Weipeng Hu () and Zhenxing Li
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Caihang Liang: School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Rui Zhang: School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Chaojian Mao: Guangxi Special Equipment Inspection and Research Institute, Nanning 541004, China
Yanfang Dong: School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Xiong Yao: School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Weipeng Hu: Guangxi Special Equipment Inspection and Research Institute, Nanning 541004, China
Zhenxing Li: School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, China

Energies, 2024, vol. 17, issue 10, 1-23

Abstract: Plate heat exchangers are widely used in the Heating, Ventilation, and Air Conditioning (HVAC) field. Cross-corrugated triangular ducts are commonly employed in plate heat exchangers. Inserting baffles into the cross-corrugated triangular ducts can improve the heat transfer performance of the plate heat exchangers. This study focuses on intricate interdependencies among the flow channel apex angle, the trapezoidal baffle inclination angle, baffle position, and Reynolds number ( Re ) on heat transfer and pressure drop using response surface methodology (RSM) and computational fluid dynamic (CFD). To identify the factors that maximize the Nusselt number ( Nu ) and minimize friction factor ( f ), the RSM is used to design factors, conduct numerical studies, and establish regression equations. The results show that the apex angle, baffle angle, X-direction position, and Re have significantly affected Nu and f . Compared to a non-baffled channel with the same apex angle and Re conditions, the optimized channel enhances heat transfer by 1.54 times and has an almost identical pressure drop. The inclined baffle significantly enhances comprehensive performance at low Re . The synergistic effect of the heat transfer and pressure drop is most optimal when the apex angle of the flow channel is 90°, the trapezoidal baffle inclination angle is 52.5°, and the Re is 1000, with the baffle position at 0.625H in the X-direction.

Keywords: cross-corrugated triangular flow duct; trapezoidal baffle; response surface methodology; computational fluid dynamic; plate heat exchanger (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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