Measurement of Thermal Conductivity of Liquids by a Transient Hot-wire Method : II, Measurement under High Pressure

Abstract

A transient hot-wire method to measure the thermal conductivity of fluid was applied to liquids under high pressure. One of the advantages of the method is that it can eliminate errors due to convection, as examined in the previous report by the present authors. Furthermore, simple structure of the test section is suitable for a high pressure instrument. Measurements were carried out with the aid of a new apparatus for two fluorinated hydrocarbons, R11 and R113, and toluene in the range of temperatures 212 K -353 K and pressures up to 54 MPa. Comparisons with existing data show that the only one set of data available for R113 under high pressure are larger than those of the present study.