利用钽丝作为热线的瞬态双热线系统对温度区间233～373 K、压力区间为0.1～30 MPa的液相二乙二醇单甲醚(diethylene glycol monomethyl ether,DGMME)的导热系数进行了实验研究,并将实验数据拟合为温度和压力的关联式。实验数据与导热系数关联式计算结果的标准偏差和最大偏差分别为0.23%和0.86%,导热系数的合成标准不确定度小于土1.0%。 The thermal conductivity of liquid diethylene glycol monomethyl ether (DGMME) in the temperature range of 233-373 K and the pressure range of 0.1-30 MPa was tested using a transient double hotline system using tantalum wire as a hot wire Research, and the experimental data fitting temperature and pressure correlation. The standard deviation and the maximum deviation of the correlation between the experimental data and the thermal conductivity are 0.23% and 0.86% respectively, and the synthetic standard uncertainty of the thermal conductivity is less than 1.0% of the soil.