Documents disponibles écrits par cet auteur

Influence of the source and sink temperatures on the optimal refrigerant charge of a water-to-water heat pump / José-M. Corberán in International journal of refrigeration, Vol. 34 N° 4 (Juin 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 881-892 Titre : Influence of the source and sink temperatures on the optimal refrigerant charge of a water-to-water heat pump Titre original : Influence des températures de la source et du puits thermique sur la charge en frigorigène optimale d'une pompe à chaleur eau-eau Type de document : texte imprimé Auteurs : José-M. Corberán, Auteur ; Israel Martínez-Galván, Auteur ; Santiago Martínez-Ballester, Auteur Année de publication : 2011 Article en page(s) : pp. 881-892 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Modelling  Heat  pump  Chiller  Refrigerant  Charge  Distribution  Solubility  Oil Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : This paper presents the results of a study carried out to elucidate the influence of the source and sink temperatures on the optimal charge of a propane water-to-water 16 kW heat pump which does not incorporate any liquid receiver. The unit had been fully tested along a previous experimental study, at various refrigerant charges and different condensing temperatures. A detailed mathematical model was then employed to simulate the unit performance. The predicted results were in very good agreement with the experiments, and furthermore, showed the same trends found in a similar unit tested at the KTH (Sweden) when the evaporation temperature was progressively decreased. Then, the model was employed to study the influence of the source and sink temperatures on the optimal charge of the unit. The simulation showed that the great variation of the optimal charge with the variation of the evaporation temperature is mainly due to the variation of the amount of refrigerant in the compressor oil. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000223 [article] Influence of the source and sink temperatures on the optimal refrigerant charge of a water-to-water heat pump = Influence des températures de la source et du puits thermique sur la charge en frigorigène optimale d'une pompe à chaleur eau-eau [texte imprimé] / José-M. Corberán, Auteur ; Israel Martínez-Galván, Auteur ; Santiago Martínez-Ballester, Auteur . - 2011 . - pp. 881-892. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 881-892 Mots-clés : Modelling  Heat  pump  Chiller  Refrigerant  Charge  Distribution  Solubility  Oil Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : This paper presents the results of a study carried out to elucidate the influence of the source and sink temperatures on the optimal charge of a propane water-to-water 16 kW heat pump which does not incorporate any liquid receiver. The unit had been fully tested along a previous experimental study, at various refrigerant charges and different condensing temperatures. A detailed mathematical model was then employed to simulate the unit performance. The predicted results were in very good agreement with the experiments, and furthermore, showed the same trends found in a similar unit tested at the KTH (Sweden) when the evaporation temperature was progressively decreased. Then, the model was employed to study the influence of the source and sink temperatures on the optimal charge of the unit. The simulation showed that the great variation of the optimal charge with the variation of the evaporation temperature is mainly due to the variation of the amount of refrigerant in the compressor oil. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000223

Oil type influence on the optimal charge and performance of a propane chiller / Israel Martínez-Galván in International journal of refrigeration, Vol. 34 N° 4 (Juin 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 1000-1007 Titre : Oil type influence on the optimal charge and performance of a propane chiller Titre original : L'influence du type d'huile sur la charge optimale et la performance d'un refroidisseur au propane Type de document : texte imprimé Auteurs : Israel Martínez-Galván, Auteur ; José Gonzálvez-Maciá, Auteur ; José-M. Corberán, Auteur Année de publication : 2011 Article en page(s) : pp. 1000-1007 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Propane  Water  chiller  Oil  Refrigerating  system  Refrigerant  Charge Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The paper presents the experimental results of a charge optimization study of a water-to-water chiller with two different oils: Mineral and POE. The employed chiller is a prototype which works with propane as refrigerant and provides for a cooling capacity of approximately 16 kW. A complete charge optimization study was performed for two different oils: mineral ISO-VG 68 and POE ISO-VG 22. The study covered a wide range of variation of condensation temperatures, all around the typical operating conditions for AC applications. The obtained performance and compressor efficiencies are studied and discussed to explain the observed differences due to the oil type. The main conclusions are that the optimal charge is strongly different, depending on the solubility of the refrigerant into the oil, and that the POE oil seems to lead to better unit performance. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000259 [article] Oil type influence on the optimal charge and performance of a propane chiller = L'influence du type d'huile sur la charge optimale et la performance d'un refroidisseur au propane [texte imprimé] / Israel Martínez-Galván, Auteur ; José Gonzálvez-Maciá, Auteur ; José-M. Corberán, Auteur . - 2011 . - pp. 1000-1007. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 1000-1007 Mots-clés : Propane  Water  chiller  Oil  Refrigerating  system  Refrigerant  Charge Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The paper presents the experimental results of a charge optimization study of a water-to-water chiller with two different oils: Mineral and POE. The employed chiller is a prototype which works with propane as refrigerant and provides for a cooling capacity of approximately 16 kW. A complete charge optimization study was performed for two different oils: mineral ISO-VG 68 and POE ISO-VG 22. The study covered a wide range of variation of condensation temperatures, all around the typical operating conditions for AC applications. The obtained performance and compressor efficiencies are studied and discussed to explain the observed differences due to the oil type. The main conclusions are that the optimal charge is strongly different, depending on the solubility of the refrigerant into the oil, and that the POE oil seems to lead to better unit performance. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000259