Résultat de la recherche
2 recherche sur le tag
'Carbon dioxide' 




Performances des systèmes frigorifiques trans-critiques utilisant le CO2 comme fluide frigorigène / Nabil Khellaf
![]()
Titre : Performances des systèmes frigorifiques trans-critiques utilisant le CO2 comme fluide frigorigène Type de document : texte imprimé Auteurs : Nabil Khellaf, Auteur ; Rabah Gomri, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 161 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Génie ClimatiqueTags : Réfrigération Cycles Trans-critiques Dioxyde de Carbone Transfert de Chaleur Évaporation Simulation Optimisation Performance Refrigeration transcritical cycles Carbon Dioxide Heat Transfer Evaporation Optimization التبريد دورات عبر حرجة ثاني أكسيد الكربون انتقال الحرارة التبخر محاكاة التحسين الأداء Index. décimale : 626 Génie Climatique Résumé : The negative impact of synthetic fluids on the environment has led researchers to
natural refrigerants, although these fluids are not harmful on the environment, some of them are dangerous because of their flammability and toxicity. Therefore, carbon dioxide goes into very good position among the other natural fluids. The thermodynamic properties of CO2 require a trans-critical cycle. Unfortunately, this cycle has low performance compared to conventional cycles. The main objective of this work is to improve the performance of the refrigeration systems using CO2 as refrigerant and study the heat transfer of carbon dioxide in evaporation.
Based on the first law of thermodynamics and the optimization analysis several trans-critical cycles were studied, in addition, new proposed cycles have been proposed and studied.
As regards the study of heat transfer during evaporation of CO2, literature review has shown that there are several correlations used to predict the coefficient of heat transfer. In order to evaluate these correlations and select the best correlation allowing the optimal design of evaporator, which ensures the required cooling capacity, an experimental database was extracted from different papers available in the literature and compared with these correlations.
Diplôme : Doctorat En ligne : ../theses/gclim/KHE6996.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10398 Performances des systèmes frigorifiques trans-critiques utilisant le CO2 comme fluide frigorigène [texte imprimé] / Nabil Khellaf, Auteur ; Rabah Gomri, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2017 . - 161 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Génie ClimatiqueTags : Réfrigération Cycles Trans-critiques Dioxyde de Carbone Transfert de Chaleur Évaporation Simulation Optimisation Performance Refrigeration transcritical cycles Carbon Dioxide Heat Transfer Evaporation Optimization التبريد دورات عبر حرجة ثاني أكسيد الكربون انتقال الحرارة التبخر محاكاة التحسين الأداء Index. décimale : 626 Génie Climatique Résumé : The negative impact of synthetic fluids on the environment has led researchers to
natural refrigerants, although these fluids are not harmful on the environment, some of them are dangerous because of their flammability and toxicity. Therefore, carbon dioxide goes into very good position among the other natural fluids. The thermodynamic properties of CO2 require a trans-critical cycle. Unfortunately, this cycle has low performance compared to conventional cycles. The main objective of this work is to improve the performance of the refrigeration systems using CO2 as refrigerant and study the heat transfer of carbon dioxide in evaporation.
Based on the first law of thermodynamics and the optimization analysis several trans-critical cycles were studied, in addition, new proposed cycles have been proposed and studied.
As regards the study of heat transfer during evaporation of CO2, literature review has shown that there are several correlations used to predict the coefficient of heat transfer. In order to evaluate these correlations and select the best correlation allowing the optimal design of evaporator, which ensures the required cooling capacity, an experimental database was extracted from different papers available in the literature and compared with these correlations.
Diplôme : Doctorat En ligne : ../theses/gclim/KHE6996.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10398 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité KHE/6996 KHE/6996 Thèse Bibliothèque principale Thèses Disponible
Titre : The influence of carbon dioxide on the aqueous corrosion of steel Type de document : texte imprimé Auteurs : Abdelouahab Haddad ; University of Nottingham, Éditeur scientifique ; J.S.L. Leach, Directeur de thèse Année de publication : 1991 Importance : 98f. Note générale : 01 Disponible dans la salle de recherche Langues : Anglais (eng) Catégories : Français - Anglais
ChimieTags : Carbon dioxide Aqueous corrosion Steel Index. décimale : 540 Chimie et sciences connexes Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=4266 The influence of carbon dioxide on the aqueous corrosion of steel [texte imprimé] / Abdelouahab Haddad ; University of Nottingham, Éditeur scientifique ; J.S.L. Leach, Directeur de thèse . - 1991 . - 98f.
01 Disponible dans la salle de recherche
Langues : Anglais (eng)
Catégories : Français - Anglais
ChimieTags : Carbon dioxide Aqueous corrosion Steel Index. décimale : 540 Chimie et sciences connexes Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=4266 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire