Abstract: This paper describes an apparatus for the rapid measurement of thermal conductivity of liquids in the temperature range from 150 to 250# and in the pressure range up to 25.0MPa. A small bead-in-glass thermistor was used as a sensitive element. The thermistor probe, which is in a circuit with a bridge, was immersed in liquid under investigation. When a heating current was passed through the thermistor, the dV/dt of the bridge was measured. The thermal conductivity of the liquid under investigation λ could be calculated with the equation λ=A-B dV/dt, where A and B are instrument constants determined by the data of standard liquids. The time of meassuring dV/dt was 1.5seconds. The apparatus was calibrated by using six standard liquids at "different temperatures and pressures, the average deviation of measurements was within±2%. The apparatus is capable of not only measuring organic liquids, but also measuring electrolytic liquilds or solution.

摘要： 本文描述了在高温高压下快速测定液体导热系数的方法.温度和压力分别达到250℃和25.0MPa,以玻璃包封的热敏电阻作为加热元件,用桥路测定热敏电阻的dV/dt,由dV/dt计算介质的导热系数,每次测量时间为1.5秒,用六个已知导热系数的参考液体标定了装置,平均偏差小于±2%.该装置不仅可以测量有机液体,而且也可以测量导电液体或溶液.