Heat Transfer Performance of zigzag PCHE With Molten Salt and Supercritical CO2 in CSP System
The printed circuit heat exchanger(PCHE)is a highly efficient and compact heat ex-changer,and serves as an ideal heat transfer component in high-temperature solar thermal power generation technology.In this study,a mathematical model of Zigzag PCHE is constructed to in-vestigate the flow and heat transfer characteristics of molten salt and supercritical CO2(S-CO2).The SST k-ω turbulence model is utilized to study convective heat transfer characteristics between molten salt and S-CO2.Results show that temperature and heat transfer coefficient periodically vary with periodical structure.The heat transfer resistance mainly occurs on the S-CO2 side and the overall heat transfer coefficient increases with the inlet flow rate of S-CO2.Additionally,Sin structure is performed to improve the heat transfer performance based on the Zigzag PCHE.
molten saltsupercritical CO2zigzag PCHEconvective heat transfer characteristics
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