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Research on compression process and compressors in supercritical carbon dioxide power cycle systems: A review

2024; Elsevier BV; Volume: 297; Linguagem: Inglês

10.1016/j.energy.2024.131288

1873-6785

Yunxia Liu, Yuanyang Zhao, Qichao Yang, Guangbin Liu, Liansheng Li,

Refrigeration and Air Conditioning Technologies

The utilization of supercritical carbon dioxide (sCO 2 ) in the Brayton cycle presents several advantages, such as compact equipment, high efficiency, and rapid response time . The sCO 2 power cycle can be applied in coal-fired power, solar thermal power, and nuclear power systems . Over the past 10 years, many scholars have researched sCO 2 power systems. The compression (pressurization) process is a core thermodynamic process in sCO 2 power cycles, achieved through the use of compressors. Therefore, compressors are important components in sCO 2 power systems. This paper provides a summary of recent studies on compression processes and compressors for sCO 2 power systems. The impact of near-critical-point characteristics of the compression process on equipment and sCO 2 power cycle systems is discussed. The investigations of the performance parameters, design considerations, design methods, and performance prediction methods of sCO 2 compressors are reviewed. The typical research results on CO 2 condensation at the compressor inlet , the effects of operating conditions on compressor performance , as well as optimization of design parameters, are also summarized. Additionally, it provides a summary of sCO 2 compressor prototypes developed by research institutes worldwide and experimental studies. Finally, the current issues with sCO 2 compressors are addressed, and the main future research directions are proposed. This paper will contribute to the development of compressors and promote the acceleration of the commercialization of sCO 2 power systems. • Summary of recent studies on compression processes for sCO 2 power systems. • Near-critical-point characteristics of compression process is discussed. • Summary of compressor prototypes by research institutes and experimental studies. • Current issues and future research directions on sCO 2 compressors are presented.