Study on Off-design Operating Characteristics of Cold-end System for SCO<sub>2</sub> Cycle Matching Fluoride-salt-cooled High-temperature Small Reactor

Zhao Quanbin; Zhao Kai; Chong Daotong; Liu Xiuting; Zhang Dalin; Zhuo Wenbin

doi:10.13832/j.jnpe.2023.06.0242

Volume 44 Issue 6

Dec. 2023

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Article Navigation > Nuclear Power Engineering > 2023 > 44(6): 242-248

Zhao Quanbin, Zhao Kai, Chong Daotong, Liu Xiuting, Zhang Dalin, Zhuo Wenbin. Study on Off-design Operating Characteristics of Cold-end System for SCO2 Cycle Matching Fluoride-salt-cooled High-temperature Small Reactor[J]. Nuclear Power Engineering, 2023, 44(6): 242-248. doi: 10.13832/j.jnpe.2023.06.0242

Citation:

Zhao Quanbin, Zhao Kai, Chong Daotong, Liu Xiuting, Zhang Dalin, Zhuo Wenbin. Study on Off-design Operating Characteristics of Cold-end System for SCO₂ Cycle Matching Fluoride-salt-cooled High-temperature Small Reactor[J]. Nuclear Power Engineering, 2023, 44(6): 242-248. doi: 10.13832/j.jnpe.2023.06.0242

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Study on Off-design Operating Characteristics of Cold-end System for SCO₂ Cycle Matching Fluoride-salt-cooled High-temperature Small Reactor

doi: 10.13832/j.jnpe.2023.06.0242

1.
State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an, 710049, China
2.
Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2022-12-02
Rev Recd Date: 2022-12-28
Publish Date: 2023-12-15

Abstract

Abstract

The small power generation system of supercritical carbon dioxide (SCO₂) Brayton cycle coupled with fluoride-salt-cooled high-temperature small reactor is considered to have a good development prospect in the field of small nuclear power/nuclear power generation because of its high efficiency, compactness and high inherent safety. In this paper, the optimization design and off-design operation characteristics of cold-side for supercritical carbon dioxide Brayton cycle are studied. Based on the Fluoride-salt-cooled high-temperature small reactor characteristics and environment conditions, various SCO₂ cycle configurations are compared, and it is found that the main compressor interstage cooling and reheat can improve thermal efficiency, but increase of limited, and extra heat exchangers are added. Then, the off-design operation characteristics of SCO₂ cycle cold side system is investigated. The operation mode with constant pressure ratio not only has high cycle efficiency, but also has a wide adaptability range to the temperature change of the environment. Therefore, the constant pressure ratio operation mode is recommended for SCO₂ cycle when the ambient temperature changes.

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References(20)

References

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