超临界二氧化碳循环系统经济性能研究

he supercritical carbon dioxide (SCO2) power cycle has been foreseen as one of the most near term promising energy conversion systems in the application field of emerging energy, due to its compactness, high efficiency, low construction cost, modularity, and so on. In this paper, the Supercritical CO2 Brayton cycles including the SCO2 single-recuperated Brayton cycle and recompression recuperated Brayton cycle are considered, and the comparative analyses are conducted at first. The SCO2 recompression recuperated Brayton cycle could rectify the temperature pinching problem that exists in SCO2 recompression recuperated Brayton cycle, and has a much better thermodynamic pEconomic Analysis on Supercritical CO2 Cycle Systemerformance, which is a more advanced SCO2 power cycle. Then, the economic model of SCO2 power cycle is built, based on the main components cost of the heat exchangers and the turbomachinery. And a group of key conditions and the corresponding SCO2 power cycle cost from Dostal\'s paper are selected, which is used to compare the cost results from this study. The cost results are similar. Finally, the economical analysis on SCO2 power cycle is conducted in this paper, taking cycle cost/ cycle power as objective function. It is observed that the cycle parameters such as heat source temperature, turbine inlet temperature, cycle pressure ratio, and pinch temperature difference of heat exchangers have significant effects on the cycle economical performance.