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

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

The thermal conductivity of binary ammonia + water mixtures was measured over the temperature range from 278 K to 356 K and at pressures to 20 MPa using the steady-state hot-wire method. Measurements were made for ten compositions over the entire concentration range from 0 to 1 mole fraction of ammo...

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Bibliographic Details
Published in:International journal of refrigeration Vol. 36; no. 4; pp. 1347 - 1368
Main Authors: Shamsetdinov, F.N., Zaripov, Z.I., Abdulagatov, I.M., Huber, M.L., Gumerov, F.M., Gabitov, F.R., Kazakov, A.F.
Format: Journal Article
Language:English
Published: Kidlington Elsevier Ltd 01-06-2013
Elsevier
Subjects:
Ammonia
ammoniac
ammoniac–eau
Ammonia–water
conductivité thermique
Correlation models
eau
modèles de corrélation
Thermal conductivity
Water
Water
Ammonia
ammoniac
Ammonia–water
eau
Thermal conductivity
ammoniac–eau
modèles de corrélation
Correlation models
conductivité thermique
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Summary:The thermal conductivity of binary ammonia + water mixtures was measured over the temperature range from 278 K to 356 K and at pressures to 20 MPa using the steady-state hot-wire method. Measurements were made for ten 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, with a coverage factor of k = 2, of the thermal conductivity, pressure, temperature, and concentration measurements is estimated to be 3%, 0.05%, 0.02 K, and 0.0014%, respectively. The average absolute deviation (AAD) between the measured and calculated reference values for pure water and ammonia is 1.3% and 1.4%, respectively. Correlation models for the thermal conductivity of liquid ammonia + water mixtures were also developed. [Display omitted] ► We present comprehensive thermal conductivity measurements on NH3/H2O mixtures. ► The measurements were made using the steady-state hot-wire method. ► Experimental conditions ranged from 278 K to 356 K at pressures to 20 MPa. ► Ten compositions were measured over the range from 0 to 1 mole fraction of ammonia. ► Correlation models were also developed.
ISSN:0140-7007
1879-2081
DOI:10.1016/j.ijrefrig.2013.02.008