Review of Recent Advances in Transcritical CO 2 Heat Pump and Refrigeration Cycles and Their Development in the Vehicle Field

Hongzeng Ji (), Jinchen Pei, Jingyang Cai, Chen Ding, Fen Guo and Yichun Wang
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Hongzeng Ji: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Jinchen Pei: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Jingyang Cai: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Chen Ding: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Fen Guo: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Yichun Wang: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China

Energies, 2023, vol. 16, issue 10, 1-21

Abstract: Refrigerant substitution is an urgent need in the context of reducing carbon emissions and slowing global warming. CO 2 is now being proposed as a promising solution based on its excellent properties and system performance, especially in low-temperature environments. This paper presents an overview of recent advances in system configuration and operation characteristics to improve the performance of transcritical CO 2 heat pump and refrigeration systems. The paper first introduces the basic research background, system cycle, and thermodynamic characteristics. Secondly, CO 2 cycle improvements with single modifications and modification combinations are reviewed. Then, some important operation characteristics and control methods are discussed. Additionally, the paper provides a detailed description of the development of transcritical CO 2 heat pump and refrigeration systems in the vehicle field. At the end of this review, conclusions and opportunities for future work in this field are presented.

Keywords: CO 2; transcritical cycle; cycle modification; operation characteristic; control methods; electric vehicle (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
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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