<p>An integrated system for the SPT plant was created in this work consisting recuperative organic Rankine cycle (RORC) as the bottoming cycle, whereas the helium Brayton cycle (HBC) was regarded as the topping cycle. Engineering equation solver software was used to do the energy, exergy, exergoeconomic analysis, and working fluid selection of the suggested system. In comparison to the traditional solar plant (SPT-HBC), it was determined that the suggested solar power plant (SPT-HBC-RORC) had an energy and exergy efficiency improvement of 19.86% and 19.85%, respectively. However, there was a 9.41% increase in the overall cost of the plant. Lastly, the energy, exergy efficiency, and levelized cost of electricity (LCOE) values of the proposed solar power plant were 34.45%, 36.89%, and 43.23 $MWh⁻¹, respectively. The best fluids in terms of thermodynamics and economy were proposed to be R1233zd(E) and R1336mzz(Z), respectively. The suggested solar power plant outperformed supercritical CO₂ power generating systems and SPT-based Rankine cycles, according to a comparison with earlier research.</p>