高精度钠热管固定点炉及其等温特性  

High Precise Sodium Heat-Pipe Fixed Point Furnaces and Their Isothermal Characteristics

作　　者：闫小克[1][2] 吕卓凡[3] 马重芳[1] 李杰[4] 段宇宁[2] Xiao-ke Zhuo-fan Chong-fang Yu-ning 

机构地区：[1]北京工业大学环境与能源工程学院,北京,100022 [2]中国计量科学研究院,北京,100013 [3]北京化工大学,北京,100029 [4]北京科技大学,北京,100083

出　　处：《计量学报》2009年第6期-,共4页Acta Metrologica Sinica

基　　金：国家科技部科技平台项目

摘　　要：介绍了中国计量科学研究院新研制的两台高精度钠热管固定点炉(SHPF-1、SHPF-2),并测量了其垂直温场.当这两台钠热管固定点炉的炉温分别控制在比铝凝固点低约2℃、3℃时,铝点容器温度计阱底部150 mm范围内温场均匀性分别为15 mK和11 mK,并与国外同类的钠热管固定点炉的技术指标进行比较.此外,分析了影响固定点炉等温性能的因素. Abstract： Two sodium heat-pipe fixed point furnaces (SHPF-1, SHPF-2) developed at the National Institute of Metrology (NIM) are described, and their vertical temperature uniformities are measured. When the temperatures of the these two furnaces are controlled about 2 ℃ and 3 ℃ respectively, below the freezing point of the aluminum, the largest temperature differences did not exceed 15 mK and 11 mK in a distance about 150mm along the reentrant well of the aluminum point cell, respectively. These temperature uniformities are compared with those of foreign similar sodium heat pipe furnaces. Additionally, factors influencing isothermal characteristics of fixed point furnaces are analyzed.

关 键 词：高精度 钠热管 固定点 等温特性 Fixed POINT temperature differences fixed POINT FREEZING POINT 计量科学研究 heat pipe 铝凝固点 技术指标 等温性能 场均匀性 foreign factors 温度计 Two EXCEED 中国 

分 类 号：TB9-55[一般工业技术—计量学]