有机传热介质高温导热系数的测定及准确性评价  

Measurement and Evaluation of High-temperature Thermal Conductivity for Organic Heat Transfer Media

作　　者：司荣[1,2] 金栋 刘峰[1,2] 江雪飞 刘晓迪[1,2] Si Rong;Jin Dong;Liu Feng;Jiang Xuefei;Liu Xiaodi(China Special Equipment Inspection&Research Institute,Beijing 100029;Technology Innovation Center of Boiler Clean,Low-carbon,Efficient Combustion and Safety Evaluation,State Administration for Market Regulation,Beijing 100029;Panjin Northern Asphalt Co.,Ltd.,Panjin 124022)

机构地区：[1]中国特种设备检测研究院,北京100029 [2]国家市场监督管理总局技术创新中心(锅炉清洁低碳高效燃烧与安全评价),北京100029 [3]盘锦北方沥青股份有限公司,盘锦124022

出　　处：《中国特种设备安全》2025年第4期18-22,共5页China Special Equipment Safety

基　　金：中国特种设备检测研究院青年基金项目“新型有机硅传热介质变质机理研究及热稳定性评价方法的建立”(2022青年14)。

摘　　要：液体在高温下易发生对流和辐射传热,为准确测定有机热载体高温导热系数,选用正十六烷为导热系数标准物质,采用定制双倒U型瞬态热线结构导热仪,对正十六烷高温导热系数进行了测定,得到了不同温度区间、不同实验参数下的测定偏差,提出了不同温度区间的推荐实验参数,并据此对高温下使用的氢化三联苯类、有机硅传热介质导热系数进行测定和不确定度计算。Liquid has convection and radiant heat transfer at high temperature.In order to measure the high-temperature thermal conductivity of organic heat media,n-hexadecane is selected as the thermal conductivity standard substance.The thermal conductivity instrument adopted a customized double inverted U-shaped transient hot-wire structure.The high-temperature thermal conductivity of n-hexadecane was measured,and the measurement deviations under different temperature ranges and experimental parameters were obtained.Recommended experimental parameters for different temperature ranges were proposed.The thermal conductivity of hydrogenated triphenyl and silicon heat transfer media was tested under this condition and then the measurement uncertainty was calculated.

关 键 词：有机传热介质 导热系数 瞬态热线法 

分 类 号：X959[环境科学与工程—安全科学]