PHYSICOTHERMAL PROPERTIES OF AQUEOUS SODIUM CHLORIDE SOLUTIONS

摘要

Physicothermal properties of sodium chloride solutions as complementary informationnto the existent in literature were experimentally measured under differentnconditions of mass concentration (in the range of 0.040 kg NaCl/kg solution ton0.240 kg NaCl/kg solution) and temperature (between 4 and 52 °C). Density,ndynamic viscosity, specific heat capacity and thermal conductivity were measurednusing a standard volumetric glass pycnometer, rheometer, differential scanningncalorimeter and coaxial dual-cylinder apparatus, respectively. Prandtl number wasncalculated with the measured properties. Statistical analyses were carried out tondetermine the effect of the salt concentration and temperature on the properties,nand, subsequently, different correlations were proposed to estimate the experimentalnresults with acceptable goodness of fit. Linear relationships were observednamong tested properties and sodium chloride concentrations, whereas the temperaturendependence was specific for each property.