同心园筒法测定液体导热系数

作者建立了相等同心园筒法测定液体导热系数的装置,并对装置设计和温差测定等环节作了改进,提高了测定的精度和准确度。该装置能够测定常压下各种液体的导热系数。为考核装置的可靠性,作者对几种有机液体的导热系数进行了测定,实验的重复精度为1％,与文献数据的偏差为1～2％,最大偏差小于3％。作者还测定了几种电解质水溶液的导热系数,并与文献数据进行了比较。文中讨论了其导热系数与温度、浓度及电解质性质之间的关系。

The measurement of liquid thermal conductivity by concentric cylinder method

Based on the principle of the relative concentric cylinder method, an equipment for the measurement of liquid thermal conductivity is established. Some parts in the design of equipment and the measurement of temperature difference are improved, therefore the precision and accuracy of measurement are increased. By using this equipment, the thermal conductivity of liquid at the atomospheric pressure can be measured. To check the reliability of the equipment, thermal conductivities of some organic liquids are determined. The reproducibiiity is about 1%, the relative deviation is 1—2%, and the maximum deviation is less than 3%. Thermal conductivities of some electrolytic solution are also determined. A compaison with the literature data has been made and the relations between the thermal conductivity, temperature, concentration and the nature of the electrolytes are discussed.