Thermodynamic Analysis of Coupling Supercritical Carbon Dioxide Brayton Cycles

Based on the first law of thermodynamics, a thermodynamic investigation was carried out on the coupling supercritical carbon dioxide Brayton cycles. The thermodynamic behavior and parameter limitations of the recompression cycle have been analyzed for a heat source system on the basis of equipment model and assumed initial conditions. A new cycle layout, named the cascaded partial flow cycle, was proposed for a high temperature difference heat source system. The thermodynamic behavior of the cascaded partial flow cycle was analyzed and evaluated. The applicable target of the recompression cycle and the cascaded partial flow cycle were proposed based on quantitative comparisons.