Experimental Study of the Thermal Conductivity of Water +Ammonia Refrigerant Mixtures at Temperatures from 278 K to 356 K and at Pressures up to 20 MPa
F. N. Shamsetdinov, Z. I. Zaripov, Ilmutdin M. Abdulagatov, Marcia L. Huber, F. M. Gumerov, F. R. Gabitov, Andrei F. Kazakov
The thermal conductivity of binary water + ammonia mixtures was measured over the temperature range from 278 K to 356 K and at pressures up to 20 MPa using the steady-state hot-wire method. Measurements were made for eight compositions over the entire concentration range from 0 to 1 mole fraction of ammonia, namely, 0.0, 0.1905, 0.2683, 0.3002, 0.4990, 0.5030, 0.6704, 0.7832, 0.9178, and 1.0 mole fraction of ammonia. In total, 316 experimental data points were obtained. The expanded uncertainty of the thermal conductivity, pressure, temperature, and concentration measurements at the 95 % confidence level with a coverage factor of k = 2 is estimated to be 1.65 %, 0.05 %, 0.02 K, and 0.0014 %, respectively. Temperature, pressure, density, and concentration dependences of the thermal conductivity of water+ammonia mixture were studied. The pure components of the mixture were compared with reference correlation equations. The average absolute deviation (AAD) between the measured and calculated reference values for pure water and ammonia are 1.30 % and 1.44 %, respectively. Various types of wide-ranging correlation models for the thermal conductivity of water+ammonia mixtures were also developed using the present measured data.
, Zaripov, Z.
, Abdulagatov, I.
, Huber, M.
, Gumerov, F.
, Gabitov, F.
and Kazakov, A.
Experimental Study of the Thermal Conductivity of Water +Ammonia Refrigerant Mixtures at Temperatures from 278 K to 356 K and at Pressures up to 20 MPa, International Journal of Refrigeration, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=912183
(Accessed June 10, 2023)