ABSTRACT
A necessity to shift from conventional energy systems to renewable energy systems has arisen in the contemporary era. Depleting fossil fuels and pollution are major constraints of current conventional energy resources. Renewable energy sources, especially solar thermal sources are possible substitutes, which can ameliorate the existing consequences of conventional resources. Preliminary, highly efficient and compact-sized power conversion systems are required to match the electricity demand for economic development. Supercritical CO2 cycles are most suitable to be operated in a range of solar thermal heat sources and dry cooling conditions. This cycle comprises more compact turbomachinery and stepping towards green energy. A theoretical evaluation of the supercritical recompression CO2 Brayton power conversion cycle coupled with solar thermal sources has been performed on the basis of the first and second law of thermodynamics. The prime objective of the present work is to numerically model and analyze the performance of supercritical CO2 recompression cycle with reheat at different operating parameters. The main performance parameters to be accessed include the overall exergetic efficiency and turbomachinery performance. For standard operating the cycle achieves exergetic efficiency of 68% along with thermal efficiency of 49.09%.
