ECONOMIC AND ENVIRONMENTAL ANALYSIS OF SCO2 POWER SYSTEM UNDER DIFFERENT SOLAR CONCENTRATING METHODS

Zhang Yicen; Fan Gang; Bi Jingfang; Wang Yuxing; Dai Yiping

doi:10.19912/j.0254-0096.tynxb.2023-1588

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (2) : 479-487. DOI: 10.19912/j.0254-0096.tynxb.2023-1588

ECONOMIC AND ENVIRONMENTAL ANALYSIS OF SCO₂ POWER SYSTEM UNDER DIFFERENT SOLAR CONCENTRATING METHODS

Zhang Yicen, Fan Gang, Bi Jingfang, Wang Yuxing, Dai Yiping

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Abstract

In this paper, the economic and environmental performance of SCO₂ power systems under linear Fresnel, trough parabolic and tower concentrating methods are analyzed respectively, and the effects of different thermal energy storage working fluids and SCO₂ cycles on system performance are compared. Finally, the multi-objective optimization is conducted for the proposed systems. The results show that increasing the hot tank temperature or decreasing the cold tank temperature contribute to lower investment cost. The SPT plant integrated with recompression SCO₂ cycle and NaCl-KCl-MgCl₂ molten salt as the thermal storage medium provides the best thermo-economic and environmental performance. In Delingha, the system cost is 0.131 $/kWh over the life sycle and produces 24.3 g/kWh of CO₂-equivalent emissions per kWh of output.

Key words

concentrated solar power / economic analysis / environmental impact / supercritical CO₂ cycle

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Zhang Yicen, Fan Gang, Bi Jingfang, Wang Yuxing, Dai Yiping. ECONOMIC AND ENVIRONMENTAL ANALYSIS OF SCO₂ POWER SYSTEM UNDER DIFFERENT SOLAR CONCENTRATING METHODS[J]. Acta Energiae Solaris Sinica. 2025, 46(2): 479-487 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1588

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