Performance Analysis and Comprehensive Evaluation of Solar Organic Rankine Cycle Combined with Transcritical CO 2 Refrigeration Cycle

Na Zhang, Po Xu, Yiming Wang, Wencai Tong and Zhao Yang ()
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Na Zhang: Ginlong Technology Co., Ltd., Ningbo 315712, China
Po Xu: Ginlong Technology Co., Ltd., Ningbo 315712, China
Yiming Wang: Ginlong Technology Co., Ltd., Ningbo 315712, China
Wencai Tong: School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China
Zhao Yang: Mechanical Engineering, Tianjin University, Tianjin 300072, China

Energies, 2023, vol. 16, issue 14, 1-13

Abstract: In order to achieve efficient utilization of solar energy resources, this study combines the trans-critical organic Rankine cycle (ORC) power cycle (TORC) with the trans-critical CO 2 refrigeration cycle (TCO 2 ). Additionally, a comprehensive three-level index decision evaluation system is developed based on system safety and environmental protection, thermodynamics, and techno-economic performance. The evaluation focuses on typical medium- and high-temperature solar energy applications and considers six organic working gases. The evaluation results demonstrate that the R600 + CO 2 solution outperformed the others. This solution achieved a maximum net output power (P net ) of 1531.31 kW and 2306.43 kW, a maximum coefficient of performance (COP) of 3.16, a predicted payback period of 2.651 years and 2.033 years, and a benefit–investment ratio of 4.533 and 5.773.

Keywords: solar energy; trans-critical ORC; trans-critical CO 2; fuzzy decision-making; integrated evaluation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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