Abstract: The thermal conductivity of ice formed in SDS solution,hydrate formed by THF and water,sand with different water content,hydrate formed by sand and THF solutions were measured in the laboratory by probe method.The results show that the relation of conductivity and temperature for ice and hydrate are diverse,when the temperature rise,the conductivity of ice drops,the hydrate gives a reverse behavior,This is because they have different construction.For the hydrate formed in the sand and solutions with different concentration of THF,the rate of thermal conductivity changed with temperature are dissimilar,when the temperature raise from -1 ℃ to 2 ℃,the conductivity of hydrate formed in the solution with THF concentration 14.3%,19.0% change from 1.979W/(m·K) and 1.898W/(m·K) to 2.068W/(m·K) and 2.012W/(m·K),the increasing speed are 4.50% and 6.01%,respectively.When the mass persent of THF equal 19.0%,the mole ratio of THF to water is at the most suitable value,and the gas hydrate has the lowest thermal conductivity coefficient.

Key words: Conductivity,    , Probe method,    , Hydrate,     , Measurement

摘要： 采用探针法对不同质量分数的十二烷基硫酸钠(SDS)水溶液中形成的冰、不同质量分数的四氢呋喃 (THF)水合物、不同含水量的石英砂、石英砂和四氢呋喃水合物体系的导热系数进行了实验研究。结果表明,不同质量分数SDS溶液中形成的冰的导热系数随着温度的增加而减小,表明其物理性质与冰类似;而由四氢呋喃和水生成的水合物的导热系数则随着温度的增加而增加,这是因为水合物的结构与冰存在不同。对于石英砂和THF质量分数分别为14.3%和19.0%的四氢呋喃水合物,当温度从-1℃升高到2℃时,导热系数分别从1.979W/(m·K)和1.898W/(m·K)增大到2.068W/(m·K)和2.012W/(m·K),增幅为4.50%和6.01%。当THF的质量分数为19.0%时,THF与水的物质的量比达到最佳值,体系的导热系数最小。

关键词: 导热系数, 探针法, 水合物, 测定