Experimental study of the thermal conductivity of ammonia + water refrigerant mixtures at temperatures from 278 K to 356 K and at pressures up to 20 MPa

摘要: The thermal conductivity of binary ammonia + water mixtures was measured over the temperature range from 278 K to 356 and at pressures 20 MPa using steady-state hot-wire method. Measurements were made for ten compositions entire concentration 0 1 mole fraction ammonia, namely, 0.0, 0.1905, 0.2683, 0.3002, 0.4990, 0.5030, 0.6704, 0.7832, 0.9178, 1.0 ammonia. In total, 316 experimental data points obtained. expanded uncertainty, with a coverage factor k = 2, conductivity, pressure, temperature, measurements is estimated be 3%, 0.05%, 0.02 K, 0.0014%, respectively. average absolute deviation (AAD) between calculated reference values pure 1.3% 1.4%, Correlation models liquid also developed.