Documents disponibles écrits par cet auteur

Comparison of corresponding-states-based correlations for the prediction of the vaporization enthalpy of fluids / Angel Mulero in Industrial & engineering chemistry research, Vol. 47 N°20 (Octobre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°20 (Octobre 2008) . - P. 7903-7916 Titre : Comparison of corresponding-states-based correlations for the prediction of the vaporization enthalpy of fluids Type de document : texte imprimé Auteurs : Angel Mulero, Auteur ; Isidro Cachadina, Auteur ; M. I. Parra, Auteur Année de publication : 2008 Article en page(s) : P. 7903-7916 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Analytical  correlations  vaporization  of  fluids  DIPPR  project Résumé : Four analytical correlations, including one proposed very recently, were used to calculate the enthalpy of vaporization of fluids. These correlations are based on the Pitzer et al. corresponding states principle and require as input the critical temperature and the acentric factor. They have generally been applied only to a reduced number of normal fluids (nonpolar, slightly polar, non-hydrogen-bonding, and nonquantum fluids), but in this paper we check their accuracy and applicability for 1594 polar and nonpolar fluids grouped into 81 families. The results are compared with the values accepted by the DIPPR project. Recommendations are given for the use of each model and for the choice of the adequate model for each family of fluids. In particular, we found that the most recent model, proposed by Morgan, gives the best results for most of the families and behaves better than the other models at both high and low temperatures. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800557q [article] Comparison of corresponding-states-based correlations for the prediction of the vaporization enthalpy of fluids [texte imprimé] / Angel Mulero, Auteur ; Isidro Cachadina, Auteur ; M. I. Parra, Auteur . - 2008 . - P. 7903-7916. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°20 (Octobre 2008) . - P. 7903-7916 Mots-clés : Analytical  correlations  vaporization  of  fluids  DIPPR  project Résumé : Four analytical correlations, including one proposed very recently, were used to calculate the enthalpy of vaporization of fluids. These correlations are based on the Pitzer et al. corresponding states principle and require as input the critical temperature and the acentric factor. They have generally been applied only to a reduced number of normal fluids (nonpolar, slightly polar, non-hydrogen-bonding, and nonquantum fluids), but in this paper we check their accuracy and applicability for 1594 polar and nonpolar fluids grouped into 81 families. The results are compared with the values accepted by the DIPPR project. Recommendations are given for the use of each model and for the choice of the adequate model for each family of fluids. In particular, we found that the most recent model, proposed by Morgan, gives the best results for most of the families and behaves better than the other models at both high and low temperatures. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800557q

Vaporization enthalpy of pure refrigerants / A. Mulero in Industrial & engineering chemistry research, Vol. 49 N° 10 (Mai 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 5018–5026 Titre : Vaporization enthalpy of pure refrigerants : comparative study of eighteen correlations Type de document : texte imprimé Auteurs : A. Mulero, Auteur ; M. I. Parra, Auteur ; K. K. Park, Auteur Année de publication : 2010 Article en page(s) : pp. 5018–5026 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Vaporization  Refrigerants Résumé : In this work, the performance and accuracy of 18 correlations for the vaporization enthalpy of 48 pure substances is studied. Forty-six of these substances are refrigerants, and two (hexane and heptane) could be used in refrigerant mixtures. Seven of the correlations include 2 adjustable coefficients for every fluid, whereas the other 11 have three coefficients. Some of these correlations are classical expressions, but others have been proposed recently or have been slightly modified or extended for this study. In all the cases, we consider the normal boiling point as a constraint, and then the input parameters are the critical temperature, and the temperature and vaporization enthalpy at the normal boiling point. The data and input properties were taken from both the DIPPR (1968 data) and the NIST databases (10 650 data). Thus, as a first step, we have studied the possible differences between these data. The results showed that the correlation recently proposed by Park gives the lowest mean average percentage deviations for both two-coefficient and three-coefficient models. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901015f [article] Vaporization enthalpy of pure refrigerants : comparative study of eighteen correlations [texte imprimé] / A. Mulero, Auteur ; M. I. Parra, Auteur ; K. K. Park, Auteur . - 2010 . - pp. 5018–5026. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 5018–5026 Mots-clés : Vaporization  Refrigerants Résumé : In this work, the performance and accuracy of 18 correlations for the vaporization enthalpy of 48 pure substances is studied. Forty-six of these substances are refrigerants, and two (hexane and heptane) could be used in refrigerant mixtures. Seven of the correlations include 2 adjustable coefficients for every fluid, whereas the other 11 have three coefficients. Some of these correlations are classical expressions, but others have been proposed recently or have been slightly modified or extended for this study. In all the cases, we consider the normal boiling point as a constraint, and then the input parameters are the critical temperature, and the temperature and vaporization enthalpy at the normal boiling point. The data and input properties were taken from both the DIPPR (1968 data) and the NIST databases (10 650 data). Thus, as a first step, we have studied the possible differences between these data. The results showed that the correlation recently proposed by Park gives the lowest mean average percentage deviations for both two-coefficient and three-coefficient models. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901015f