Condensation heat transfer and multi-phase pressure drop of CO2 near the critical point in a printed circuit heat exchanger.

Highlights • Heat transfer and multi-phase pressure drop of CO 2 near the critical point. • Homogeneous equilibrium model approach is used to evaluate the 2-phase flow. • Heat transfer and pressure drop test was conducted with a PCHE. • A new set of correlations is suggested for CO 2 2-phase flow near the critical point. Abstract In this study, condensation heat transfer and multi-phase pressure drop of CO 2 near the critical point are investigated occurring in a Printed Circuit Heat Exchanger (PCHE) for a supercritical CO 2 power cycle application in mind. Homogeneous Equilibrium Model (HEM) approach is used to evaluate and develop appropriate heat transfer and pressure drop correlations. The experiment was performed with the CO 2 test facility called SCO2PE (Supercritical CO 2 Pressurizing Experiment) in KAIST. The heat transfer and pressure drop test was conducted with the PCHE in the facility. Existing correlations were compared to the test data and a new set of correlations was necessary to be developed. A new set of correlations is newly suggested in this paper which captures physical characteristics reasonably well. [ABSTRACT FROM AUTHOR]