<p>Combined Brayton/Steam Rankine cycle power plant is among the most commonly used and common cycles between fossil fuels and clean energy sources, especially solar energy and waste energy. The entry of two-phase water vapor causes both corrosion and erosion of turbine blades, which leads to a reduction in turbine efficiency and capacity. Controlling the inlet steam superheat degree can help reduce the amount of liquid phase in the steam, thereby minimizing the negative effects of wet steam. The aim of the model proposed in this research is to more optimally control the single-phase steam entering the steam turbine in a combined cycle power plant. In this paper, an enhanced model of the Brayton/Rankin cycle power plant with the help of phase change materials (PCM) and thermoelectric generators (TEGs), is presented and simulated with EES software. The results indicate the positive role of thermoelectric modules in the proper distribution of energy between different processes of the Rankine steam cycle. According to the results, the quality of the fluid entering the steam drum (x₁₀) at zero showed the highest thermal efficiency of the power plant. The simulation results showed that increasing the dimensionless thermoelectric figure of merit (<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10973_2025_14872_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="34" /> </InlineMediaObject> <EquationSource Format="TEX">\(ZT_{\rm m}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>Z</mi> <msub> <mi>T</mi> <mi mathvariant="normal">m</mi> </msub> </mrow> </math></EquationSource> </InlineEquation>) has a significant effect on the total thermal efficiency of the power plant. Also, increasing the air pressure ratio in the compressor from 5 to 14 increased the thermal efficiency of the total power plant from 53.76 (%) to 60.33 (%).</p>