Experimental study on heat transfer limit of high temperature potassium heat pipe for advanced reactors

被引：50

作者：

Wang, Chenglong ^{[1
]}

Liu, Xiao ^{[1
]}

Liu, Minghao ^{[2
]}

Tang, Simiao ^{[1
]}

Tian, Zhixing ^{[1
]}

Zhang, Dalin ^{[1
]}

Tian, Wenxi ^{[1
]}

Qiu, Suizheng ^{[1
]}

Su, Guanghui ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Dept Nucl Sci & Technol, State Key Lab Multiphase Flow Power Engn, Shaanxi Key Lab Adv Nucl Energy & Technol, Xian 710049, Shaanxi, Peoples R China

[2] Nucl Power Inst China, Chengdu, Peoples R China

来源：

ANNALS OF NUCLEAR ENERGY | 2021年 / 151卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Heat piped cooled reactor; High temperature heat pipe; Experimental study; Heat transfer performance and limit;

D O I：

10.1016/j.anucene.2020.107935

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Heat pipe cooled reactor (HPR) is widely applied in various environment due to its remarkable advantages compared with other nuclear power systems, such as high reliability, low noise level and compact structure. As one of the essential components in HPR, the high temperature heat pipe has an important effect on HPR operation performance. In this paper, an experimental study was carried to investigate the thermal-hydraulic characteristics and heat transfer limit of potassium heat pipe. Under the steady-state conditions, heating power and inclination angle of heat pipe were taken as sensitivity parameters. By increasing heating power, the heat transfer capacity was enhanced. For inclination angle, an increase in inclination angle would enhance heat transfer for low filling ratio heat pipe, while it does not make obvious effect on high filling ratio heat pipe. As for heat transfer limit, by analyzing the axial wall temperature distribution and predicting the vapor flow pressure drop, the particular phenomena is classified to four heat transfer limits including viscosity, sonic, entrainment and condensation limit. When heat pipe is cooled by natural air convection, the accurate prediction of condensation limit under effect of inclination is performed by air convection heat transfer relationship. Because of the friction force influence on viscosity limit when operating at low temperature state, the temperature at inlet of condenser section is 11 degrees C lower than adjacent position. The same reason for sonic limit when operating at low temperature state, the temperature at outlet of evaporator section is 17 degrees C higher than adjacent position. The occurrence of local dryout which lead evaporator temperature increasing sharply to 632 degrees C is entrainment limit. The experimental results provide guidance for the engineering application of high temperature heat pipe. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：8

共 28 条

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