烷烃二元混合物导热率的测定与预测

用实验室建立的小型液体导热率测试仪，测定常压下正庚烷－正十二烷和正十一烷－正十六烷两个二元烷烃混合物体系在３１３．１５Ｋ、３３３．１５Ｋ及３５３．１５Ｋ时的导热率数据。另外，还将流体传递性质的ｖａｎｄｅｒＷａｌｓ模型扩展，应用该模型合适的混合规则，对研究的两个烷烃二元混合物体系不同温度下的导热率进行了预测，结果令人满意。

Measurement and Prediction of Thermal Conductivities of Alkane Binary Mixtures

he　thermal　conductivities　of　the　binary　systems　of　n heptane n dodecane　and　n undecane n hexadecane　were　measured　at　313.15K,333.15K　and　353.15K,respectively.An　extension　of　the　van　der　Waals　model　for　the　thermal　conductivity　of　liquid　alkane　mixtures　in　wide　temperature　ranges　has　been　developed.Using　an　appropriate　mixing　rule　without　any　adjustable　parameters,we　applied　the　model　to　predicting　the　thermal　conductivity　data　for　the　two　binary　systems　studied　in　this　work.The　predicted　thermal　conductivities　are　in　excellent　agreement　with　the　experimental　values.