Experimental investigation on boiling heat transfer of high pressure water in a SCWR sub-channel
Experimental investigation on boiling heat transfer of high pressure water in a SCWR sub-channel
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SCWR子通道内高压水沸腾传热实验研究
DOI：
10.1016/j.ijheatmasstransfer.2016.09.088
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发表时间：
2017-02
影响因子：
5.2
通讯作者：
Qincheng Bi
中科院分区：
文献类型：
--
作者：
Han Wang;Weishu Wang;Qincheng Bi
最近完成了一项实验，以获得壁面温度和传热系数在亚临界压力下的SCWR子通道。对试验节段进行线电极切割，以模拟2 × 2棒束的中央子通道。实验参数包括11-19 MPa的压力，700-1300 kg/m2 s的质量通量和200-600 kW/m2的热通量。分析了单相区和两相区的传热特性随热流密度、系统压力和质量流量的变化规律。对于给定的压力，发现在汽-水两相区，壁温随热流密度的增大而增大，随质量流量的减小而减小。偏离核沸腾（DNB）观察到的壁温分布在子通道。实验结果表明，随着压力的增加，DNB壁面温度的上升幅度越来越大。相关性评估也进行了对目前的实验数据集。结果表明，方氏关联式与两相传热系数吻合较好。比较了亚临界压力和超临界压力下通道内的换热差异。结果表明，亚临界压力下的壁温可能低于或高于超临界压力下的壁温，这取决于q/G比和DNB的发生。
An experiment has recently been completed to obtain the wall temperature and heat transfer coefficient of water at subcritical pressures in a SCWR sub-channel. The test section was wire-electrode cut to simulate the central sub-channel of a 2 × 2 rod bundle. Experimental parameters covered the pressures of 11–19 MPa, mass fluxes of 700–1300 kg/m2s and heat fluxes of 200–600 kW/m2. Heat transfer characteristics in single-phase and two-phase regions were analyzed with respect to the variations of heat flux, system pressure and mass flux. For a given pressure, it was found that the wall temperature increases with increasing heat flux or decreasing mass flux in the steam-water two-phase region. Departure from Nucleate Boiling (DNB) was observed from the wall temperature profiles in the sub-channel. Experimental results showed that the soaring wall temperature at DNB becomes dramatic with the increase of pressure. Correlation assessments have also been conducted against the current set of experimental data. The comparisons indicated that the Fang correlation agrees well against the two-phase heat transfer coefficient. Heat transfer difference in the sub-channel at subcritical and supercritical pressures was compared. It was concluded that the wall temperature at sub-critical pressure may be lower or higher than that of supercritical pressure depending onq/Gratio and the occurrence of DNB.
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影响因子：
6.4
作者：
Fang, Xiande;Zhou, Zhanru;Wang, Hao
通讯作者：
Wang, Hao
DOI：
10.1016/j.ijheatmasstransfer.2012.08.036
发表时间：
2012-12
影响因子：
5.2
作者：
I. Anghel;H. Anglart
通讯作者：
I. Anghel;H. Anglart
影响因子：
--
作者：
KANDLIKAR, SG
通讯作者：
KANDLIKAR, SG
DOI：
10.1021/i260019a023
发表时间：
1966-07
期刊：
Industrial & Engineering Chemistry Process Design and Development
影响因子：
--
作者：
J. C. Chen
通讯作者：
J. C. Chen
DOI：
--
发表时间：
2000
期刊：
--
影响因子：
--
作者：
Y. Oka
通讯作者：
Y. Oka