| Abstract
| - The thermal conductivity of four binary aqueous NaBr solutions of (10, 20, 30, and 38) mass %, threebinary aqueous KBr solutions of (10, 20, and 30) mass %, and three ternary aqueous NaBr + KBr solutionsof (10NaBr + 5KBr, 10NaBr + 10KBr, and 10NaBr + 20KBr) mass % have been measured with aconcentric-cylinder (steady-state) technique. Measurements were made near the saturation curve of (0.1to 2) MPa and at two isobars of (10 and 40) MPa. The range of temperature was (294 to 577) K. The totaluncertainty in the thermal conductivity, pressure, temperature, and composition measurements wasestimated to be less than 2%, 0.05%, 30 mK, and 0.02%, respectively. The temperature, pressure, andconcentration dependence of the thermal conductivity of binary and ternary solutions were studied. Themeasured values of thermal conductivity were compared with data and correlations reported in theliterature. The reliability and accuracy of the experimental method was confirmed with measurementson pure water with well-known thermal conductivity values. The experimental and calculated values ofthermal conductivity for pure water from the IAPWS formulation show excellent agreement within theirexperimental uncertainties (AAD within 0.51%) in the temperature range from (290 to 575) K and atpressures up to 40 MPa. Correlation equations for the thermal conductivity of the binary solutions studiedwere obtained as a function of temperature, pressure, and composition by a least-squares method fromthe experimental data. The AAD between measured and calculated values from this correlation for thethermal conductivity was 1.5%.
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