A Review of Flow and Heat Transfer Characteristics of Supercritical Carbon Dioxide under Cooling Conditions in Energy and Power Systems

Dingchen Wu, Mingshan Wei (), Ran Tian, Siyu Zheng and Jundi He
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Dingchen Wu: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Mingshan Wei: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Ran Tian: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Siyu Zheng: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Jundi He: Department of Mechanical Engineering, The University of Sheffield, Sheffield S1 3JD, UK

Energies, 2022, vol. 15, issue 23, 1-28

Abstract: Supercritical carbon dioxide (SCO 2 ) is widely used in many fields of energy and power engineering, such as nuclear reactors, solar thermal power generation systems, and refrigeration systems. In practical applications, SCO 2 undergoes a cooling process significantly when it is cooled near the pseudo–critical point. Because of the drastic variations in thermo–physical properties, the heat transfer characteristics fluctuate, affecting the heat exchange and overall cycle performance. This paper summarizes extensive experiments and numerical simulations on the cooling process of SCO 2 in various application scenarios. The effects of various working conditions, such as mass flow, working pressure, pipe diameter, flow direction, and channel shapes, are reviewed. The applicability and computational results using different numerical methods under different working conditions are also summarized. Furthermore, empirical correlations obtained in experiments at different conditions are included. The present review can provide a helpful guideline for the design of effective cooling systems or condensers so that the accuracy of the design and efficiency of the system can be improved.

Keywords: cooling condition; cooler/condenser; heat transfer enhancement/deterioration; heat transfer correlation; buoyancy (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: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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