Open AccessPerformance analysis of printed circuit heat exchanger for supercritical carbon dioxide and water
Author(s) -
Huzhong Zhang,
Ke Cheng,
Xiulan Huai,
Jin Guo
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/721/1/012039
Subject(s) - heat transfer , heat exchanger , thermodynamics , brayton cycle , supercritical fluid , materials science , supercritical carbon dioxide , carbon dioxide , mechanics , environmental science , chemistry , physics , organic chemistry
Printed circuit heat exchanger could be used as pre-cooler in the supercritical carbon dioxide (S-CO 2 ) Brayton power cycle. Due to the drastic variations of S-CO 2 properties in pre-cooler, segmental design method is used to investigate the thermal-hydraulic performance of PCHE. When the heat duty is given, the local heat transfer entropy generation number has extreme value, which appears near the intersection point of the heat capacity flow rates of both sides. In addition, the local and total entropy generation mainly depend on the local and total heat transfer entropy generation, and the flow imbalance increases entropy generation, especially under conditions of the higher local heat capacity flow rate of water.