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• W4213302053 endingPage "118246" @default.
• W4213302053 startingPage "118246" @default.
• W4213302053 abstract "• A Three-dimensional numerical thermal model is developed for solar Parabolic trough collector with s-CO2 as a heat transfer fluid. • Non-uniform solar heat flux calculated using Monte Carlos Ray Tracing based Optical Tool. • Entropy generation is calculated using the local temperature and velocity fields. • Optimal inlet boundary conditions were obtained for the s-CO2 as heat transfer fluid in the solar parabolic trough collector. Parabolic trough collector (PTC) is a widely used and efficient Concentrating Solar Power (CSP) technology for generating solar thermal power. Supercritical CO 2 (s-CO 2 ) is a heat transfer fluid (HTF) that shows good promising for use in solar PTC for further improvement in its efficiency and operations. A numerical thermal model is developed to understand the performance of s-CO 2 as an HTF in a solar PTC. The local temperature and velocity fields were used to calculate the entropy generated within HTF due to finite temperature differences and fluid flow friction. A commercially available LS-3 parabolic trough collector is used for the analysis with a modified receiver. An optical analysis tool based on Monte Carlo Ray tracing is used to calculate non-uniform heat flux distribution around the circumference of the PTC receiver. Entropy generated at various operating pressures, inlet temperatures, and inlet Reynolds number using s-CO 2 as HTF is calculated and analyzed. Results showed that entropy generated in the PTC receiver is reduced to a minimum at optimal Reynolds number for each of the operating pressures and inlet temperatures of the HTF. The Bejan number estimates the contribution of entropy generated due to heat transfer irreversibilities to the entropy generated due to heat transfer and fluid flow irreversibilities which is between 0.2 and 0.4 at high flow rates and close to 1 at low flow rates. Exergy efficiency analysis supported the optimized inlet boundary conditions." @default.
• W4213302053 created "2022-02-24" @default.
• W4213302053 creator A5018109260 @default.
• W4213302053 creator A5033087692 @default.
• W4213302053 date "2022-05-01" @default.
• W4213302053 modified "2023-10-06" @default.
• W4213302053 title "Numerical investigation of entropy generation in a solar parabolic trough collector using supercritical carbon dioxide as heat transfer fluid" @default.
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• W4213302053 doi "https://doi.org/10.1016/j.applthermaleng.2022.118246" @default.
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