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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率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：有效的热扩散率和电导率是确定高温气冷堆多孔卵石床内在安全性的两个关键参数。已经开发了全半径规模的热测试设备，以测量高温下的这些热性能。已经进行了两个真空测试和两个高达1200摄氏度的大气压氦气测试，以通过逆方法确定与温度有关的参数。两次测试均采用不同的加热过程验证了可重复的结果。此外，通过以相反的方法获取位置，可以减少来自热电偶安装位置的主要实验误差以及随机堆积效应。在各个测试中分别进行了灵敏度和不确定性分析，以合理描述这些测试中有效热扩散率和电导率的结果。 （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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