Title

Numerical Study on Thermal-Hydraulic Performance of a Two-Sided Etched Zigzag-Type High-Temperature Printed Circuit Heat Exchanger

Document Type

Conference Proceeding

Publication Date

1-1-2017

Publication Title

Energy Procedia

Publisher

Elsevier Ltd

Volume

142

First page number:

3950

Last page number:

3955

Abstract

The thermal-hydraulic performance of a two-sided etched zigzag-type printed circuit heat exchanger is numerically investigated at high temperature of 900°C and high pressure above 7 MPa. It is found the global non-dimensional parameters at high temperature and high pressure is significantly related to the operating condition, but the local pitch-averaged non-dimensional parameters can be used to predict the thermal-hydraulic performance of printed circuit heat exchanger in a wide operating condition. The additional elliptical upper channel can improve the heat transfer of printed circuit heat exchanger, but increase its pressure drop simultaneously. Compared to the baseline design without elliptical upper channel, the Nusselt number in the modified model with upper channel d=0.234 mm is increased by 7%-17%, while the Fanning friction factor is increased by 5%-12%. However, the Nusselt number in the modified model with upper channel d=0.512 mm is only increased by 3%-5% and the Fanning friction factor is only increased by 5%-6% compared to the modified model with upper channel d=0.234 mm. © 2017 The Author(s).

Language

english

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