Journal
APPLIED THERMAL ENGINEERING
Volume 70, Issue 1, Pages 867-875Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2014.05.040
Keywords
Printed circuit heat exchanger; Supercritical CO2; Airfoil fin; Thermal-hydraulic; Structure optimization
Funding
- International Cooperation and Exchanges Project of NSFC of China [51120165002]
- National Natural Science Foundation of China [51025623, 51276139]
- China and Shaanxi Postdoctoral Science Foundation [2013M530423]
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As a new type of discontinuous fin, airfoil fin (AFF) can bring a better thermal-hydraulic performance than Zigzag fin and S-shaped fin when applied to PCHE using supercritical CO2 as a working fluid. In this study, the effects of AFF arrangements on heat transfer and flow resistance are investigated. The results show that a sparser staggered arrangement of fins can lead to a better thermal-hydraulic performance in an AFF PCHE and the flow resistance plays a major role in determining the overall performance. It concludes that reducing the flow resistance needs to be considered first in the optimal design of a PCHE using supercritical CO2 as working fluid. Furthermore, a new fin structure (modified AFF) is proposed for flow resistance reduction and is proved to be better than the AFF. (C) 2014 Elsevier Ltd. All rights reserved.
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