PERFORMANCE STUDY OF NOVEL THROUGH SOLAR CONCENTRATOR COUPLED CO2 TRANSCRITICAL RANKINE CYCLE POWER GENERATION SYSTEMS

Yang Junlan; Li Mengxi; Han Yifei; Wang Tianyu; Zhang Kaiyu

doi:10.19912/j.0254-0096.tynxb.2023-1558

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (2) : 488-495. DOI: 10.19912/j.0254-0096.tynxb.2023-1558

PERFORMANCE STUDY OF NOVEL THROUGH SOLAR CONCENTRATOR COUPLED CO₂ TRANSCRITICAL RANKINE CYCLE POWER GENERATION SYSTEMS

Yang Junlan, Li Mengxi, Han Yifei, Wang Tianyu, Zhang Kaiyu

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Abstract

In order to study the utilization of solar heat in Rankine cycle power generation systems, the two-stage compression intermediate reheat CO₂ transcritical Rankine cycle （DSRRC）, the combined pumped reheat/internal reheat CO₂ transcritical Rankine cycle （CRIRC）, and the self-condensing CO₂ transcritical Rankine cycle system （SCRC） are coupled with the solar collector and storage subsystems, respectively, and a thermodynamic model is developed to analyze the effects of the operating parameters on the thermal performance of the power generation system. Combining the conditions given for the systems in this paper shows that there exists an optimal turbine inlet pressure at the maximum thermal efficiency for the three systems, which are 15.0, 21.5, and 23.0 MPa, respectively;The thermal efficiency and exergy efficiency of the three systems increase continuously with the increase of the turbine inlet temperature; The maximum net output power of the DSRRC is increased by 34.0% and 68.5%, respectively, compared with that of the CRIRC and SCRC; And an increase of the shunt ratio from 0.1 to 0.5 increases the net output power of DSRRC by 35.4% and 72% compared to CRIRC and SCRC, respectively.

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solar energy / thermodynamic analysis / CO₂ transcritical cycle / Rankine cycle

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Yang Junlan, Li Mengxi, Han Yifei, Wang Tianyu, Zhang Kaiyu. PERFORMANCE STUDY OF NOVEL THROUGH SOLAR CONCENTRATOR COUPLED CO₂ TRANSCRITICAL RANKINE CYCLE POWER GENERATION SYSTEMS[J]. Acta Energiae Solaris Sinica. 2025, 46(2): 488-495 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1558

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