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Title: Thermal design and optimization of small-scale high effectiveness cross-flow heat exchangers
Authors: Buckinx, Geert ×
Baelmans, Martine
Rogiers, Frederik #
Issue Date: 2013
Publisher: Pergamon Press
Series Title: International Journal of Heat and Mass Transfer vol:60 pages:210-220
Abstract: This paper addresses the question to what extent parallel-plate cross-flow heat exchangers can be downsized without loss of thermal-hydraulic performance. It is shown that when the characteristic length scales of the channels are reduced at a constant pressure drop, the effectiveness exhibits a maximum due to axial heat conduction in the plate material. The point of maximal effectiveness is found to correspond to a maximal thermal power density and thus to
the minimal volume required for obtaining a given effectiveness. From an asymptotic analysis, closed-form expressions are derived for the optimal geometric parameters that maximize power density. The resulting expressions define optimal elemental units that allow constructing parallel-plate cross-flow heat exchangers with the lowest possible core volume for effectiveness values between 0.55 and 1.
ISSN: 0017-9310
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Applied Mechanics and Energy Conversion Section
Technologiecluster Werktuigkundige Industriƫle Ingenieurstechnieken
Mechanical Engineering Technology TC, Technology Campus Diepenbeek
× corresponding author
# (joint) last author

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