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主页 旧刊 有关人员 未来大会 American Society of Thermal and Fluids Engineering
Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748

NUMERICAL INVESTIGATIONS OF SUBCOOLED FLOW BOILING IN A PEBBLE BED

Shanshan Bu
Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China

Jie Wang
Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China

Wan Sun
Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China

Liang-ming Pan
Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China

Jian Yang
Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, 710049, China

Qiu-Wang Wang
Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P.R. China

DOI: 10.1615/TFEC2017.mst.017736
pages 2827-2836

摘要

The Pebble Bed Water Reactor (PBWR) has attracted wide attention due to its outstanding advantages in the inherent safety performance, high conversion efficiency and low power density design. In this paper, the RPI wall boiling model was applied to solve the local flow and heat transfer of subcooled flow boiling in a pebble-bed channel. The effects of inlet subcooling on the flow and heat transfer characteristics are carefully analyzed. It is found that fluid velocity is lower in the corner between adjacent pebbles, leading to deterioration of heat transfer. So the wall temperature was higher near the contact points of the adjacent pebbles. The bubbles began to grow near the contact points between adjacent balls. Reducing the inlet temperature would delay the onset of boiling and the area of boiling region was getting smaller. This study can provide useful information to the design of the PBWR.

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