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Partager le résultat de cette recherche Interroger des sources externesPerformances 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 ??????? ????? ??? ???? ???? ????? ??????? ?????? ??????? ?????? 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 . - [S.l.] : 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 ??????? ????? ??? ???? ???? ????? ??????? ?????? ??????? ?????? 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 : Contribution à l'amélioration des performances d'un séparateur statique tourbillonnaire Type de document : texte imprimé Auteurs : Michel Pellerej ; M. Alquier, Directeur de thèse ; Institut national polyyechnique, Editeur scientifique Année de publication : 1981 Importance : 281 p. Note générale : Disponible au magasin de la bibliothèque centrale Langues : Français (fre) Catégories : Français - Anglais
Génie MécaniqueTags : pérformance Séparateur Index. décimale : 620 Génie Mécanique Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=909 Contribution à l'amélioration des performances d'un séparateur statique tourbillonnaire [texte imprimé] / Michel Pellerej ; M. Alquier, Directeur de thèse ; Institut national polyyechnique, Editeur scientifique . - 1981 . - 281 p.
Disponible au magasin de la bibliothèque centrale
Langues : Français (fre)
Catégories : Français - Anglais
Génie MécaniqueTags : pérformance Séparateur Index. décimale : 620 Génie Mécanique Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=909 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité PEL/2294 PEL/2294 Thèse Bibliothèque principale Thèses Disponible
Titre : American cultural imperialism and Chinese resistance through performance : from a postcolonial perspective. Type de document : texte imprimé Auteurs : Allal Belaid, Auteur ; Brahim Harouni, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 226 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Anglais (eng) Catégories : Français - Anglais
Langue AnglaiseTags : The United States China Imperialism Hegemony Americanization CultureIdeology Resistance Performance Etats-Unis Chine Impérialisme Hégémonie Américanisation Culture Idéologie Résistance ???????? ??????? ????? ??????????? ??????? ???????? ?????? Index. décimale : 420 Anglais et vieil anglais (anglo-saxon) : indice de base 42 Résumé : The wide spread of American culture has recently triggered a controversial debate among scholars in the field of Humanities. The hegemonic phenomenon has affected societies from different corners of the globe, and it appears that even most conservative societies are not safe from such global homogenization. Accordingly, this thesis attempts to describe and analyze American cultural imperialism in light of the twenty-first century global changes and cultural configurations. From a postcolonial view, it examines the complex relationship within the American-Chinese couple. The theoretical part is devoted to study and define the key concepts and their relation with Uncle Sam's expansionist culture. It provides an overall picture of the classic history of the United States to underline the fact that culture has always been the basis of American hegemonic practices around the world. From its creation to the globalization era, passing through continental Americanization, the US has chiefly relied on culture to build up its modern empire. On the way, the thesis examines Chinese society to give evidences about cultural expansion and its impacts on both social structure and consumption. It synthesizes that culture has a great role in controlling societies and more importantly in gaining the US ideological and consuming markets. At last, the thesis investigates the reaction of the Chinese administration, with at its head the Communist Party, against American cultural incursion that plainly impacted Chinese identity and sovereignty. It goes through three important performances which show how China converted a cultural struggle against American imperialism into a prosperous cultural move.
Diplôme : Doctorat En ligne : ../theses/anglais/BEL1521.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10965 American cultural imperialism and Chinese resistance through performance : from a postcolonial perspective. [texte imprimé] / Allal Belaid, Auteur ; Brahim Harouni, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2018 . - 226 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Anglais (eng)
Catégories : Français - Anglais
Langue AnglaiseTags : The United States China Imperialism Hegemony Americanization CultureIdeology Resistance Performance Etats-Unis Chine Impérialisme Hégémonie Américanisation Culture Idéologie Résistance ???????? ??????? ????? ??????????? ??????? ???????? ?????? Index. décimale : 420 Anglais et vieil anglais (anglo-saxon) : indice de base 42 Résumé : The wide spread of American culture has recently triggered a controversial debate among scholars in the field of Humanities. The hegemonic phenomenon has affected societies from different corners of the globe, and it appears that even most conservative societies are not safe from such global homogenization. Accordingly, this thesis attempts to describe and analyze American cultural imperialism in light of the twenty-first century global changes and cultural configurations. From a postcolonial view, it examines the complex relationship within the American-Chinese couple. The theoretical part is devoted to study and define the key concepts and their relation with Uncle Sam's expansionist culture. It provides an overall picture of the classic history of the United States to underline the fact that culture has always been the basis of American hegemonic practices around the world. From its creation to the globalization era, passing through continental Americanization, the US has chiefly relied on culture to build up its modern empire. On the way, the thesis examines Chinese society to give evidences about cultural expansion and its impacts on both social structure and consumption. It synthesizes that culture has a great role in controlling societies and more importantly in gaining the US ideological and consuming markets. At last, the thesis investigates the reaction of the Chinese administration, with at its head the Communist Party, against American cultural incursion that plainly impacted Chinese identity and sovereignty. It goes through three important performances which show how China converted a cultural struggle against American imperialism into a prosperous cultural move.
Diplôme : Doctorat En ligne : ../theses/anglais/BEL1521.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10965 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BEL/1521 BEL/1521 Thèse Bibliothèque principale Thèses Disponible 
Titre : Analyse des annotations dans les productions écrites des élèves de la 4ème année moyenne Type de document : texte imprimé Auteurs : Nadjia Bestandji, Auteur ; Daouia Hanachi, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2013 Importance : 229 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles Langues : Français (fre) Catégories : Français - Anglais
Langue FrançaiseTags : annotation performance travail erreur performances work error ???????? ??????? ????? Index. décimale : 440 Langues romanes. Français Résumé : The annotation constitutes an essential device to help the pupils to improve their performances. Indeed, when a teacher gives an annotated work, the pupil, for little that it includes/understands the remarks that are made to him, has auto-évaluatives reactions that have effects on its later behaviors. Our study consisted in examining, on the one hand, the appreciations related to the copy, on the other hand, the way in which the errors are announced to the pupils. According to the result of the analysis, we made a certain number of proposals aiming at improving the FLE. Diplôme : Magistère En ligne : ../theses/francais/BES1333.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=6328 Analyse des annotations dans les productions écrites des élèves de la 4ème année moyenne [texte imprimé] / Nadjia Bestandji, Auteur ; Daouia Hanachi, Directeur de thèse . - constantine (Route ain el bey, Algérie) : Université Constantine 1, 2013 . - 229 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Langue FrançaiseTags : annotation performance travail erreur performances work error ???????? ??????? ????? Index. décimale : 440 Langues romanes. Français Résumé : The annotation constitutes an essential device to help the pupils to improve their performances. Indeed, when a teacher gives an annotated work, the pupil, for little that it includes/understands the remarks that are made to him, has auto-évaluatives reactions that have effects on its later behaviors. Our study consisted in examining, on the one hand, the appreciations related to the copy, on the other hand, the way in which the errors are announced to the pupils. According to the result of the analysis, we made a certain number of proposals aiming at improving the FLE. Diplôme : Magistère En ligne : ../theses/francais/BES1333.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=6328 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BES/1333 BES/1333 Thèse Bibliothèque principale Thèses Disponible Documents numériques
texte intégraleAdobe Acrobat PDF
Titre : Etude du champ solaire d’une centrale thermique hybride de production d’electricite. Type de document : texte imprimé Auteurs : Adel Miles, Auteur ; O. Khemis, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 145 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Génie MécaniqueTags : solaire thermodynamique, concentration, Cylindro-parabolique Centrale Optimisation Performance Rayonnement solaire Simulation solar thermodynamics, concentration, Parabolic trough Power station Optimization Solar radiation ?????? ??????? ???????? ?????? ???? ???? ?? ????? ??????? ???????? ??????
???????Index. décimale : 620 Génie Mécanique Résumé : The work presented in this thesis is a contribution to the study of the production of
electricity by a hybrid thermal power plant exploiting the solar field on the one hand and
natural gas on the other hand.
This work concerns firstly the evaluation of the thermodynamic performances of a solargas hybrid thermal power system with a power of 150 MW, the method of energy analysis
was used in this thesis. This method is used to determine the main parameters in order to
achieve improvements in system performance. The development of the analysis model in this
thesis is carried out by determining the thermal and solar efficiency as well as the efficiency
of solar electricity. Due to the calculation of the thermal and solar performances in typical
days and an average of the days of the year, we used simulation software "Aspen Plus" to
determine the thermodynamic parameters of the hybrid plant in the case of Algerian weather
conditions. As well as the System Advisor Model (SAM), this gives a methodology and
information particularly on cylindro-parabolic shapes concerning the part of the solar field in
the system studied. The results are calculated hour by hour from sunrise to sunset. The second
part of this work is being improved in the overall efficiency of the plant with two levels of
pressure that directly affects the capacity of the steam turbine in the power block. In the third
part, an optimization of the power at the level of the steam turbine is also carried out. The
optimization was carried out in the power block which contains two gas turbines and a double
pressure steam cycle where the high pressure part is only heated. Preliminary simulations for
this system have shown that the steam turbine cycle can achieve optimum conditions for
reheating and low vapor pressure, which would enhance the performance of the system. The
fourth part concerns the comparison of the key parameters of the thermal power plant in
different sites based on the economic factor (LCOE), the configuration of the solar field
section and the line spacing or the so-called effect of shading. The exploitation of the "Aspen
plus" and "SAM" software enabled us to establish models of optimal hybrid power plants
(solar-gas) in the arid zone of Algeria. Such a study is a reference for the construction and site
selection of the installation of this type of power plant.Diplôme : Doctorat en sciences En ligne : ../theses/gmecanique/MIL7126.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10476 Etude du champ solaire d’une centrale thermique hybride de production d’electricite. [texte imprimé] / Adel Miles, Auteur ; O. Khemis, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2017 . - 145 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Génie MécaniqueTags : solaire thermodynamique, concentration, Cylindro-parabolique Centrale Optimisation Performance Rayonnement solaire Simulation solar thermodynamics, concentration, Parabolic trough Power station Optimization Solar radiation ?????? ??????? ???????? ?????? ???? ???? ?? ????? ??????? ???????? ??????
???????Index. décimale : 620 Génie Mécanique Résumé : The work presented in this thesis is a contribution to the study of the production of
electricity by a hybrid thermal power plant exploiting the solar field on the one hand and
natural gas on the other hand.
This work concerns firstly the evaluation of the thermodynamic performances of a solargas hybrid thermal power system with a power of 150 MW, the method of energy analysis
was used in this thesis. This method is used to determine the main parameters in order to
achieve improvements in system performance. The development of the analysis model in this
thesis is carried out by determining the thermal and solar efficiency as well as the efficiency
of solar electricity. Due to the calculation of the thermal and solar performances in typical
days and an average of the days of the year, we used simulation software "Aspen Plus" to
determine the thermodynamic parameters of the hybrid plant in the case of Algerian weather
conditions. As well as the System Advisor Model (SAM), this gives a methodology and
information particularly on cylindro-parabolic shapes concerning the part of the solar field in
the system studied. The results are calculated hour by hour from sunrise to sunset. The second
part of this work is being improved in the overall efficiency of the plant with two levels of
pressure that directly affects the capacity of the steam turbine in the power block. In the third
part, an optimization of the power at the level of the steam turbine is also carried out. The
optimization was carried out in the power block which contains two gas turbines and a double
pressure steam cycle where the high pressure part is only heated. Preliminary simulations for
this system have shown that the steam turbine cycle can achieve optimum conditions for
reheating and low vapor pressure, which would enhance the performance of the system. The
fourth part concerns the comparison of the key parameters of the thermal power plant in
different sites based on the economic factor (LCOE), the configuration of the solar field
section and the line spacing or the so-called effect of shading. The exploitation of the "Aspen
plus" and "SAM" software enabled us to establish models of optimal hybrid power plants
(solar-gas) in the arid zone of Algeria. Such a study is a reference for the construction and site
selection of the installation of this type of power plant.Diplôme : Doctorat en sciences En ligne : ../theses/gmecanique/MIL7126.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10476 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MIL/7126 MIL/7126 Thèse Bibliothèque principale Thèses Disponible Permalink
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PermalinkPermalinkChoix et optimisation des paramètres de fonctionnement d'un capteur solaire utilise pour la climatisation / Amel Ghellab
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