| 高温气冷堆球床等效导热系数实验装置模拟计算 |
| 任成1, 杨星团1, 李聪新2, 孙艳飞1, 刘志勇1 |
| 1. 清华大学 核能与新能源技术研究院, 先进反应堆工程与安全教育部重点实验室, 北京 100084; 2. 环境保护部 核与辐射安全中心, 北京 100088 |
| Modeling of the heat transfer characteristics of the effective thermal conductivity test facility for high temperature gas-cooled reactors |
| REN Cheng1, YANG Xingtuan1, LI Congxin2, SUN Yanfei1, LIU Zhiyong1 |
| 1. Key Laboratory of Advanced Reactor Engineering and Safety of the Ministry of Education, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China; 2. Nuclear and Radiation Safety Center, Ministry of Environmental Protection of the People's Republic of China, Beijing 100088, China |
摘要:
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| 摘要球床等效导热系数是反映高温气冷堆球床型堆芯宏观热量导出能力的特征参数。为提高中国高温气冷堆设计计算及安全分析能力, 清华大学核研院研制了高温气冷堆堆芯全尺寸球床等效导热系数测量实验装置, 可进行静态石墨球床在真空及氦气条件下的等效导热系数测量实验。通过对该实验装置的结构进行适当简化, 建立了模拟其高温、真空条件下辐射、导热传热特性的二维模型。利用该模型计算了实验装置内的稳态、动态传热特性, 可以对球床区径向温度分布、上下保温层材质不同带来的影响、中心发热体超温情况、升降温过程等作出先期理论评估, 给出进一步实验的指导性建议。 | |||
| 关键词 ：高温气冷堆,球床等效导热系数,高温真空条件,温度场计算 | |||
| Abstract：The effective thermal conductivity is a characteristic parameter which represents the macroscopic heat transfer ability of the pebble bed type core of the high temperature gas-cooled reactor. A full-scale effective thermal conductivity measurement facility was developed by the Institute of Nuclear and New Energy Technology of Tsinghua University to improve calculations and safety analyses of the Chinese high temperature gas-cooled reactor design using experiments in a static graphite pebble bed in a vacuum or helium environment. A simplified two-dimensional model was used to simulate the thermal conduction and radiation characteristics of the facility under vacuum and at high temperatures. The steady and transient heat transfer characteristics were calculated to assess the radial temperature distribution in the pebble bed zone, the influences of different materials in the top and bottom insulating layers, overheating of the central heaters and temperature increases and decreases to guide operation of the experimental facility. | |||
| Key words：high temperature gas-cooled reactoreffective thermal conductivityhigh temperature and vacuum conditiontemperature distribution calculation | |||
| 收稿日期: 2014-12-09 出版日期: 2015-11-09 | |||
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| 引用本文: |
| 任成, 杨星团, 李聪新, 孙艳飞, 刘志勇. 高温气冷堆球床等效导热系数实验装置模拟计算[J]. 清华大学学报（自然科学版）, 2015, 55(9): 991-997. REN Cheng, YANG Xingtuan, LI Congxin, SUN Yanfei, LIU Zhiyong. Modeling of the heat transfer characteristics of the effective thermal conductivity test facility for high temperature gas-cooled reactors. Journal of Tsinghua University(Science and Technology), 2015, 55(9): 991-997. |
| 链接本文: |
| http://jst.tsinghuajournals.com/CN/或 http://jst.tsinghuajournals.com/CN/Y2015/V55/I9/991 |
图表:
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| 图1 球床等效导热系数实验装置外观图 |
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| 图2 球床等效导热系数实验装置内部结构示意图 |
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| 图3 二维简化计算模型 |
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| 表1 材料热物性参数参考值 |
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| 图4 稳态总体温度分布 |
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| 图5 球床区域温度分布 |
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| 图6 球床区内热流密度分布 |
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| 图7 辐射传热下稳态温度分布 |
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| 图8 发热体和均温套筒温度分布 |
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| 图9 升温过程功率和温度变化 |
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| 图10 降温过程温度变化 |
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