Abstract
The objective of the present work is the investigation of a regenerative supercritical Brayton cycle (SBC) and its combination with an organic Rankine cycle (ORC). The study includes assessment, comparison, and single-objective optimization of these systems which are driven by molten salt solar power tower (SPT). First, the performances of 13 different working fluids from 18 introduced gases in the supercritical regions are studied in SBC and 6 working fluids are selected for further analysis. Then, a parametric analysis is performed to assess the effects of the compressor pressure ratio (CPR) and the Brayton turbine inlet temperature (BTIT) variations on net power output, exergy efficiency and total exergy destruction rate. After that, the optimum operating points of system performance are reported. The results show that using ORC causes all three output parameters to be improved. The highest net power output is 177321 kW and the highest exergy efficiency is 21.23% which are obtained by Helium as the working fluid. Moreover, the minimum exergy destruction is found to be 70576 kW allocating Oxygen. Finally, by comparing the examined gases in SBC, it can be concluded that using Helium leads to the best thermodynamic performance of the system.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
