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Thermodynamic properties of the LiCl-H2O system at vapour-liquid equilibrium from 273 to 400 K.

Propriétés thermodynamiques d'un système au LiCl-H2O en équilibre vapeur-liquide entre 273 et 400 K.

Auteurs : PÁTEK J., KLOMFAR J.

Type d'article : Article, Article de la RIF

Résumé

A formulation of the thermodynamic properties of the LiCl-H2O system at vapour-liquid equilibrium is presented in the form of separate Gibbs energy equations for the vapour and solution phases. Explicit thermodynamically consistent equations for density, isobaric heat capacity, enthalpy, entropy, enthalpy of dilution and osmotic coefficient are given. The pressure at vapour-liquid equilibrium is calculated from the condition of phase equilibrium. The description of the properties is valid from 273 K or from the crystallization line up to 400 K in temperatures and for solution composition from 0 to 50 wt% of LiCl in the solution, which is the region covered by available experimental data. The thermodynamic properties of the gas phase are approximated by the properties of pure water vapour computed from the IAPWS formulation 1995. The Gibbs energy equation for solution is based upon a body of experimental data that have been critically assessed. Within the present study, 136 experimental works have been collected containing a total of 2921 data points on various thermodynamic properties of the LiCl-H2O solutions. Gaps in the database are shown to give experimenters orientation for future research. The uncertainties associated with correlation are estimated to be plus or minus 0.4% for density, plus or minus 2.0% for pressure and plus or minus 2.4% for isobaric heat capacity. The uncertainty in values of enthalpy is estimated to be less than plus or minus 10 kJ/kg and less than plus or minus 0.03 kJ/kg.K for entropy. Values of the particular properties generated by the representative equations are provided to assist with the confirmation of computer implementation of the calculation procedure.

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Format PDF

Pages : 287-303

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Détails

  • Titre original : Thermodynamic properties of the LiCl-H2O system at vapour-liquid equilibrium from 273 to 400 K.
  • Identifiant de la fiche : 2008-0493
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 31 - n. 2
  • Date d'édition : 03/2008

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