Thermo-Hydraulic Performance of Pillow-Plate Heat Exchangers with Secondary Structuring: A Numerical Analysis
Author:
Afsahnoudeh Reza1, Wortmeier Andreas1, Holzmüller Maik2, Gong Yi2, Homberg Werner2ORCID, Kenig Eugeny Y.1ORCID
Affiliation:
1. Chair of Fluid Process Engineering, Paderborn University, 33098 Paderborn, Germany 2. Chair of Forming and Machining Technology, Paderborn University, 33098 Paderborn, Germany
Abstract
Pillow-plate heat exchangers (PPHEs) represent a suitable alternative to conventional shell-and-tube and plate heat exchangers. The inherent waviness of their channels promotes fluid mixing in the boundary layers and facilitates heat transfer. The overall thermo-hydraulic performance of PPHEs can further be enhanced by applying secondary surface structuring, thus increasing their competitiveness against conventional heat exchangers. In this work, various secondary structures applied on the PPHE surface were studied numerically to explore their potential to enhance near-wall mixing. Computational fluid dynamics (CFD) simulations of single-phase turbulent flow in the outer PPHE channel were performed and pressure drop, heat transfer coefficients, and overall thermo-hydraulic efficiency were determined. The simulation results clearly demonstrate a positive impact of secondary structuring on heat transfer in PPHEs.
Funder
German Research Foundation Paderborn Center for Parallel Computing
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction
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