超临界水拟临界点的热膨胀系数计算研究

马栋梁; 周涛; 齐实; 陈杰; 夏榜样; 肖泽军

doi:10.11889/j.0253-3219.2016.hjs.39.120601

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超临界水拟临界点的热膨胀系数计算研究

核能科学与工程 | 更新时间：2021-05-24

- 超临界水拟临界点的热膨胀系数计算研究
- Calculation research on pseudo-critical thermal expansion coefficient of supercritical water
- 核技术 2016年39卷第12期文章编号：120601
- 作者机构：
  
  1.华北电力大学核科学与工程学院北京 102206
  2.华北电力大学核热工安全与标准化研究所北京 102206
  3.非能动核能安全技术北京市重点实验室北京 102206
  4.中国核动力研究设计院核反应堆系统设计技术重点实验室成都 610041
  5.中国核动力研究设计院核反应堆热工水力技术重点实验室成都 610041
- 作者简介：
  
  [ "马栋梁, 男, 1982年出生, 2008年于华北电力大学获硕士学位, 博士研究生, 研究方向为核热工水力与安全", "MA Dongliang, male, born in 1982, graduated from North China Electric Power University with a master's degree in 2008, doctoral student, focusing on nuclear thermal hydraulic and safety" ]
  周涛, E-mail:zhoutao@ncepu.edu.cn ZHOU Tao, E-mail:zhoutao@ncepu.edu.cn
- 基金信息：
  
  中核核反应堆热工水力技术重点实验室基金(No.20130901);核反应堆系统设计技术重点实验室基金(No.2015BJ0151)
- DOI：10.11889/j.0253-3219.2016.hjs.39.120601
  中图分类号： TL99
- 收稿日期：2016-10-12，
  
  修回日期：2016-11-10，
  
  纸质出版日期：2016-12
- 稿件说明：
移动端阅览
马栋梁, 周涛, 齐实, 等. 超临界水拟临界点的热膨胀系数计算研究[J]. 核技术, 2016,39(12):120601

Dongliang MA, Tao ZHOU, Shi QI, et al. Calculation research on pseudo-critical thermal expansion coefficient of supercritical water[J]. Nuclear techniques, 2016, 39(12): 120601
马栋梁, 周涛, 齐实, 等. 超临界水拟临界点的热膨胀系数计算研究[J]. 核技术, 2016,39(12):120601 DOI： 10.11889/j.0253-3219.2016.hjs.39.120601.

Dongliang MA, Tao ZHOU, Shi QI, et al. Calculation research on pseudo-critical thermal expansion coefficient of supercritical water[J]. Nuclear techniques, 2016, 39(12): 120601 DOI： 10.11889/j.0253-3219.2016.hjs.39.120601.

摘要

在临界点附近时，超临界水的热膨胀系数很大，随着压力的升高，拟临界点的热膨胀系数迅速下降，拟临界点的热膨胀系数是计算临界相变转换数的基础，对于分析超临界压力下的流动不稳定性非常重要。因此，计算超临界水在拟临界点的热膨胀系数，对于了解和掌握超临界水堆中能量的转换或热量传递非常重要。运用MATLAB曲线拟合工具箱，对超临界水的拟临界点的膨胀系数进行了拟合回归分析。拟合得出了超临界水的拟临界点的热膨胀系数的计算公式。该公式具有结构简单易于计算的特点，最大绝对误差为0.20 K

-1

，最大的相对误差为0.19%，计算精度满足工业研究与分析的要求。

Abstract

Background:

The supercritical water thermal expansion coefficient is very large when the reactor is approaching the critical point

but drops rapidly with the increase of pressure. The pseudo-critical thermal expansion coefficient is the basis for calculation of the critical phase transition transformation number which is of great importance in the analysis of flow instability of supercritical pressure water

therefore its calculation is very important to understand and master the conversion of energy or heat transfer in supercritical water reactor.

Purpose:

This study aims to derive a fitting formula for direct calculation of the pseudo-critical expansion coefficient. It is useful for thermal-hydraulic program analysis.

Methods:

First of all

the pseudo-critical temperature need to be calculated

then a regression analysis for the pseudo-critical thermal expansion coefficient of supercritical water is fitted by using MATLAB curve fitting toolbox. The fitting calculation formula about the pseudo-critical thermal expansion coefficient is derived from those fitting data in the form of combination formula.

Results:

The calculation result is continuous smoothness with maximum absolute error no more than 0.20 K

-1

and the biggest relative error is 0.19%.

Conclusion:

The formula is simple in structure and easy to calculate with high efficiency

and the calculation precision meets the requirements of industry research and analysis.

关键词

Keywords

references

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