1,2-Ethanediol, 1,2-propanediol and their aqueous solutions are widely used as heat transfer fluids. Their thermal conductivity is a vital physical property, yet there are only few reports in literature. In this paper, thermal conductivity of binary aqueous solutions of the two glycols was measured using the transient hot wire method at temperature from 253.15 K to 373.15 K at atmospheric pressure. Measurement was made for six compositions over the entire concentration range from 0 mol to 1 mol fraction of glycol, namely, 0.0 mol, 0.2 mol, 0.4 mol, 0.6 mol, 0.8 mol, and 1.0 mol fraction of glycol. The uncertainties of temperature and concentration measurement were estimated to be 0.01 K and 0.1 %, respectively. The combined expanded uncertainty of thermal conductivity with a level of confidence of 0.95 (k = 2) was 2 %. The second-order Scheffé polynomial was used to correlate the temperature and composition dependence of the experimental thermal conductivity, which was found to be in good agreement with the experiment data from the present work and other reports.

1,2-乙二醇，1,2-丙二醇及其水溶液被广泛用作传热流体。它们的导热性是至关重要的物理性质，但是在文献中只有很少的报道。在本文中，使用瞬态热线法在大气压下从253.15 K到373.15 K的温度下测量了两种二醇的二元水溶液的热导率。在乙二醇的0摩尔至1摩尔分数的整个浓度范围内，即0.0摩尔，0.2摩尔，0.4摩尔，0.6摩尔，0.8摩尔和1.0摩尔分数的乙二醇的六个浓度范围内进行了六种组合物的测量。温度和浓度测量的不确定度分别估计为0.01 K和0.1％。置信水平为0.95（k = 2）为2％。二阶Scheffé多项式用于关联实验导热系数对温度和成分的依赖性，发现该系数与本工作和其他报告中的实验数据非常吻合。