瞬态热带法热物性测试技术中加热功率的选取  

Selection of Heating Power in Thermophysical Property Measurement With Transient Hot-strip Method

作　　者：魏高升[1] 杜小泽[1] 于帆[2] 张欣欣[2] 

机构地区：[1]电站设备状态监测与控制教育部重点实验室(华北电力大学),北京市昌平区102206 [2]北京科技大学热能工程系,北京市海淀区100083

出　　处：《中国电机工程学报》2008年第20期44-47,共4页Proceedings of the CSEE

基　　金：华北电力大学博士学位教师科研基金项目(200622013)

摘　　要：根据瞬态热带法的基本原理,对实验测量中加热功率的选取进行了系统分析,提出了相应的选取方法。通过对被测材料的导热系数进行初步估计,采用查图法选取恰当的加热功率,可避免因加热功率选取不合理而影响导热系数的测量精度。通过对不同种类材料的测量,验证了方法的有效性。研究结果同时表明瞬态热带法更适合于测量导热系数小于2W/(m·K)的绝热材料、建筑材料、散体及液体材料,而不适合测量金属材料的导热系数。The heating power in experimental measurement process was investigated based on principle of transient hot-strip method. By roughly thermal conductivity estimation of the material, the heating power can be determined through the figure and it can avoid inaccurate thermal conductivity measurement for irrational heating power. The method was validated by thermal conductivity measurements of various materials. The results also show that it is appropriate to determine thermal conductivity of the materials such as insulator, building materials, loose materials as well as liquid etc. with thermal conductivity less than 2 W/（m.K） with transient hot-strip method.

关 键 词：热物性 导热系数 瞬态热带法 加热功率 

分 类 号：TK124[动力工程及工程热物理—工程热物理]