Citation: Ma Dongliang, Zhou Tao, Feng Xiang, Huang Yanping. Study on Critical Region Determination Method of Supercritical Water[J]. Chemistry, ;2019, 82(2): 151-157. shu

Study on Critical Region Determination Method of Supercritical Water

Ma Dongliang ^1,2,3 ,
Zhou Tao ^1,2,3,, ,
Feng Xiang ^1,2,3 ,
Huang Yanping ⁴

1.
School of Nuclear Science and Engineering, North China Electric Power University, Beijing 102206
2.
Institute of Nuclear Thermal-Hydraulic Safety and Standardization, North China Electric Power University, Beijing 102206
3.
Beijing Key Laboratory of Passive Safety Technology for Nuclear Energy, North China Electric Power University, Beijing 102206
4.
Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610041

Corresponding author: Zhou Tao, zhoutao@ncepu.edu.cn
Received Date: 17 July 2018
Accepted Date: 18 October 2018

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Reasonable determination and regional division of supercritical water in critical regions plays an important role in understanding the characteristics of supercritical water flow and heat exchange in critical transition regions. In this paper, the transition characteristics of supercritical water from the quasi-liquid state to the quasi-vapor state are analyzed, and the characteristics of the variation of the thermal conductivity, dynamic viscosity, constant pressure ratio and expansion coefficient are also discussed. The classification and decision model of supercritical water in critical region are summarized. The results showed that the flow characteristic parameters and heat exchange characteristic parameters of supercritical water have a series of continuous and drastic changes in the critical transition zone of supercritical water. The critical region of supercritical water can be divided more reasonably by considering the expansion property of supercritical water and the maximum specific heat characteristic. On the basis of this analysis, the three-zone analysis decision model of supercritical water is improved, and the data of the new supercritical water in the critical region are obtained. The boundary calculation equation of the new supercritical water area is obtained. It has an error range of ±0.3℃, meeting the requirements of the calculation and analysis.
- Supercritical water,
- Critical region,
- Maximum ratio heat zone,
- Mixing factor,
- Three district decision model
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