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首页> 外文期刊>International Journal of Heat and Mass Transfer >Repeatable experimental measurements of effective thermal diffusivity and conductivity of pebble bed under vacuum and helium conditions
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Repeatable experimental measurements of effective thermal diffusivity and conductivity of pebble bed under vacuum and helium conditions

机译：真空和氦气条件下卵石床有效热扩散性和电导率的可重复实验测量

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摘要

Effective thermal diffusivity and conductivity are two crucial parameters to determine inherent safety in porous pebble bed of High Temperature Gas-cooled Reactor. A full-radius-scale heat test facility has been developed to measure these thermal properties at high temperature. Two vacuum tests and two atmospheric-pressure helium tests up to 1200 degrees C have been conducted to determine the temperature-dependent parameters by the inverse method. Repeatable results are validated by both tests with different heating processes. Furthermore, the primary experimental errors from installation positions of thermocouples as well as random packing effect are reduced by retrieving positions in the inverse method. Sensitivity and uncertainty analyses are carried out in respective tests to give the reasonable descriptions of the results of effective thermal diffusivity and conductivity in these tests. (C) 2019 Elsevier Ltd. All rights reserved.
机译：有效的热扩散和电导率是两个关键参数，用于确定高温气体冷却反应器多孔卵石床中固有的安全性。已经开发出全径级热试验设施以在高温下测量这些热性质。已经进行了两个真空测试和两个大气压氦试验，最高可达1200℃，以通过逆方法确定温度依赖性参数。通过具有不同加热过程的测试验证可重复的结果。此外，通过在逆方法中检索位置来减少来自热电偶的安装位置以及随机填充效果的主要实验误差。在各个试验中进行敏感性和不确定分析，以提供这些测试中有效热扩散性和导电性结果的合理描述。 （c）2019 Elsevier Ltd.保留所有权利。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2019年第10期|204-216|共13页
  • 作者

    Wu Yongyong; Ren Cheng; Yang Xingtuan; Tu Jiyuan; Jiang Shengyao;

  • 作者单位

    Tsinghua Univ Inst Nucl & New Energy Technol Collaborat Innovat Ctr Adv Nucl Energy Technol Key Lab Adv Reactor Engn & Safety Minist Educ Beijing 100084 Peoples R China;

    Tsinghua Univ Inst Nucl & New Energy Technol Collaborat Innovat Ctr Adv Nucl Energy Technol Key Lab Adv Reactor Engn & Safety Minist Educ Beijing 100084 Peoples R China;

    Tsinghua Univ Inst Nucl & New Energy Technol Collaborat Innovat Ctr Adv Nucl Energy Technol Key Lab Adv Reactor Engn & Safety Minist Educ Beijing 100084 Peoples R China;

    Tsinghua Univ Inst Nucl & New Energy Technol Collaborat Innovat Ctr Adv Nucl Energy Technol Key Lab Adv Reactor Engn & Safety Minist Educ Beijing 100084 Peoples R China|RMIT Univ Sch Engn Melbourne Vic 3083 Australia;

    Tsinghua Univ Inst Nucl & New Energy Technol Collaborat Innovat Ctr Adv Nucl Energy Technol Key Lab Adv Reactor Engn & Safety Minist Educ Beijing 100084 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Effective thermal diffusivity and conductivity; High-temperature test facility; Inverse method; Pebble bed; High Temperature Gas-cooled Reactor;

    机译：有效的热扩散和电导率;高温测试设施;逆方法;卵石床;高温气体冷却反应器;

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