Modélisation des données thermodynamiques du mélange ammoniac/eau

Barhoumi, M.; Snoussi, Ali; Ezzine, N. Ben; Mejbri, Kh.; Bellagi, A.

doi:10.1016/j.ijrefrig.2003.09.005

Cited by 15 publications

(3 citation statements)

References 2 publications

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“…Especially for the vapour molar volume further coefficients of the virial development are needed in Eq. (5). The liquid molar volume and isobaric beat capacity would be represented with more complicated models than those of Eqs.…”

Section: Resultsmentioning

confidence: 99%

“…The proposition of the Kalina power cycle in 1983 has led to a significant increasing of the research effort on the properties of the ammonia-water mixture. The availability of new experimental databank, especially of the thermodynamic properties of the mixture, has allowed the formulation of unified and conceptually empirical equations based upon the Helmoltz [1] or Gibbs [2][3][4][5] free energies.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modelling of the thermodynamic properties of the water–ammonia mixture by three different approaches

Mejbri¹,

Bellagi²

2006

International Journal of Refrigeration

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modelling of the thermodynamic properties of the water–ammonia mixture by three different approaches

Mejbri¹,

Bellagi²

2006

International Journal of Refrigeration

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“…They can be classified into six groups: cubic EOSs [3][4][5][6][7][8][9][10][11], virial EOSs [12,13], Gibbs excess energy models [14][15][16], Helmoltz free energy models [17][18][19][20][21], Leung-Griffiths model [22], and polynomial functions [23,24]. Tillner-Roth and Friend [17] reviewed some EOSs and models before 1998, and Kherris et al [14] reviewed in detail most of the EOSs and models up to 2013, where strength and weakness of each model was pointed out.…”

Section: Introductionmentioning

confidence: 99%

A Helmholtz free energy equation of state for the NH3–H2O fluid mixture: Correlation of the PVTx and vapor–liquid phase equilibrium properties

Mao

Jun

Lü

2015

Fluid Phase Equilibria

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Experimental Study of the Critical Behavior of the Isochoric Heat Capacity of Aqueous Ammonia Mixture

et al. 2009

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The isochoric heat capacity of a NH 3 + H 2 O (0.2607 mole fraction of ammonia) mixture has been measured in the near-and supercritical regions. Measurements were made in the single-and two-phase regions including the coexistence curve using a high-temperature, high-pressure, nearly constant-volume adiabatic calorimeter. Measurements were made along 38 liquid and vapor isochores in the range from 120.03 kg · m −3 to 671.23 kg · m −3 and at temperatures from 478 K to 634 K and at pressures up to 28 MPa. Temperatures at the liquid-gas phase transition curve, T S (ρ), for each measured density (isochore) and the critical parameters (T C and ρ C ) for the 0.2607 NH 3 + 0.7393 H 2 O mixture were obtained using the quasi-static thermograms technique. The expanded uncertainty of the heat-capacity measurements at the 95 % confidence level with a coverage factor of k = 2 is estimated to be 2 % to 3 % in the near-critical and supercritical regions, 1.0 % to 1.5 % in the liquid phase, and 3 % to 4 % in the vapor phase. Uncertainties of the density, temperature, and concentration measurements are estimated to be 0.06 %, 15 mK, and 5×10 −5 mole fraction, respectively. An unusual behavior of the isochoric heat capacity of the mixture was found near the maxcondetherm point (in the retrograde region). The value of the Krichevskii parameter was calculated using the critical properties data for the mixture and vapor-pressure 123 738 Int J Thermophys (2009) 30:737-781 data for the pure solvent (H 2 O). The derived value of the Krichevskii parameter was used to analyze the critical behavior of the strong (C P , K T ) and weakly (C V ) singular properties in terms of the principle of isomorphism of critical phenomena in binary mixtures. The values of the characteristic parameters (K 1 , K 2 ), temperatures (τ 1 , τ 2 ), and the characteristic density differences ( ρ 1 , ρ 2 ) were calculated for the NH 3 + H 2 O mixture by using the critical-curve data.

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Modélisation des données thermodynamiques du mélange ammoniac/eau

Cited by 15 publications

References 2 publications

Modelling of the thermodynamic properties of the water–ammonia mixture by three different approaches

Modelling of the thermodynamic properties of the water–ammonia mixture by three different approaches

A Helmholtz free energy equation of state for the NH3–H2O fluid mixture: Correlation of the PVTx and vapor–liquid phase equilibrium properties

Experimental Study of the Critical Behavior of the Isochoric Heat Capacity of Aqueous Ammonia Mixture

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