Performance analysis of S-CO2 recompression Brayton cycle based on turbomachinery detailed design

Yuandong Zhang; Min-jun Peng; Genglei Xia; GE WANG; Cheng Zhou

doi:https://doi.org/10.1016/j.net.2020.02.016

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자료유형: 학술저널

저자정보: Yuandong Zhang (Harbin Engineering University) Min-jun Peng (Harbin Engineering University) Genglei Xia (Harbin Engineering University) GE WANG (Beijing Institute of Control and Engineering) Cheng Zhou (Beijing Institute of Control and Engineering)

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제52권 제9호

발행연도: 2020.9

수록면: 2,107 - 2,118 (12page)

DOI: https://doi.org/10.1016/j.net.2020.02.016

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The nuclear reactor coupled with supercritical carbon dioxide (S-CO2) Brayton cycle has good prospects in generation IV reactors. Turbomachineries (turbine and compressor) are important work equipment in circulatory system, whose performances are critical to the ef?ciency of the energy conversion system. However, the sharp variations of S-CO2 thermophysical properties make turbomachinery performances more complex than that of traditional working ?uids. Meanwhile, almost no systematic analysis has considered the effects of turbomachinery ef?ciency under different conditions. In this paper, an in-house code was developed to realize the geometric design and performance prediction of S-CO2 turboma- chinery, and was coupled with systematic code for Brayton cycle characteristics analysis. The models and methodology adopted in calculation code were validated by experimental data. The effects of recom- pressed fraction, pressure and temperature on S-CO2 recompression Brayton cycle were studied based on detailed design of turbomachinery. The results demonstrate that the recompressed fraction affects the turbomachinery characteristic by changing the mass ?ow and effects the system performance eventually. By contrast, the turbomachinery ef?ciency is insensitive to variation in pressure and temperature due to almost constant mass ?ow. In addition, the S-CO2 thermophysical properties and the position of mini- mum temperature difference are signi?cant in?uential factors of cyclic performance.

#Supercritical CO2 #Recompression brayton cycle #Turbomachinery #Performance analysis

참고문헌 (38)

참고문헌 신청

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