Library Subscription: Guest

ISSN Online: 2377-424X

ISBN Print: 978-1-56700-421-2

International Heat Transfer Conference 15
August, 10-15, 2014, Kyoto, Japan

Analysis on Optimal Configuration of Air-Foil Shaped Printed Circuit Heat Exchanger in Supercritical Carbon Dioxide Power Cycle

Get access (open in a dialog) DOI: 10.1615/IHTC15.hte.009931
pages 4031-4042

Abstract

One of the key issues of PCHE technology is to achieve an efficient and compact design that enables to enhance heat transfer and reduce the pressure drop caused by the complex configuration of micro-channel in PCHE. Previously, Kim et al. (2008) suggested an airfoil shaped fin for the PCHE micro-channel. They claimed that the pressure drop decreased remarkably up to 10 times at the same heat transfer performance. B. Choi (2010) stepped further to investigate the best performed airfoil shape in PCHE by computational fluid dynamic techniques. In the line of research, this paper investigate the optimal configuration of the airfoil shaped fin and the sensitivity analysis of various design parameters in PCHE by the verification of CFD techniques with the experimental results of airfoil fin and zigzag channel PCHE. Dominant parameters of the fin arrangement that affects to the thermal-hydraulic performance of PCHE are the horizontal and vertical pitch between two adjacent airfoil fins and the staggered fin distance. ANSYS ICEM and FLUENT are used for the grid generation and the computational calculation. CO2 properties is based on NIST chemistry web-book database. To reduce the calculation cost, the symmetric wall boundary condition is used and k-? turbulence model is selected. As a result, it was found that the perfectly staggered arrangement with the high mass flow rate is better for the proper design of an airfoil fin PCHE. To decrease pressure loss by maintaining heat transfer, the arrangement should be adjusted to minimize the change of the cross-sectional flow area.