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Partager le résultat de cette recherche Interroger des sources externesModes de conversion de l’énergie solaire (Conversions photothermique et photovoltaïque) Et Leurs utilisations dans l’habitat. / Oualid Sotehi
Titre : Modes de conversion de l’énergie solaire (Conversions photothermique et photovoltaïque) Et Leurs utilisations dans l’habitat. Type de document : texte imprimé Auteurs : Oualid Sotehi, Auteur ; Abla Chaker, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 209 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Génie ClimatiqueTags : conversion photothermique photovoltaïque systèmes solaires actifs et passifs maison solaire de Boussaâda collecteurs CPC collecteurs hybrides PV/T à eau distillation solaire photothermal photovoltaic active and passive solar systems Boussaâda solar house CPC collectors hybrid PV/T water collectors solar distillation التحويل الطاقة الحرارية الضوئية الطاقة الكهرو الضوئية الأنظمة الشمسية النشطة والغير
نشطة المنزل الشمسي بوسعادة لاقط ذو تركيز CPCلاقط هجين PV/Tالتقطير الشمسيIndex. décimale : 626 Génie Climatique Résumé : The energy consumption of the building sector in Algeria accounts for most of the energy produced in the country. An action to reduce the impact of this sector on the economy and the environment must be undertaken. The use of solar energy is a serious candidate for an effective and sustainable solution. The objective of our work is to carry out a study on the use of solar energy in buildings. The study of different active and passive solar systems and processes that can be integrated has demonstrated the possibility of a large number of solutions. A solar house of the solar village built in Boussaâda is chosen to conduct calculations in three different climates of Algeria. The simulation results of the passive systems show that if the use of passive devices such as solar walls and glazed surfaces can achieve significant energy savings (although considered insufficient), improving the thermal performance of the structure and glazed surfaces according to the passivhauss standard could lead to a greater decrease in heating and cooling needs. A house with low energy consumption is obtained for the cities of Algiers and Constantine. The performance of active systems is also studied. A comparison between different solar collectors to meet domestic hot water needs shows that CPC collectors are the most efficient. Nevertheless, if the electrical production of the hybrid PV/T water collectors is taken into consideration, they present a suitable and elegant solution for a possible integration. These collectors can be chosen to ensure the operation of the absorption and adsorption refrigeration systems and to cover all the energy needs of the solar house. The results obtained further show that the adsorption systems are more efficient than the absorption systems for low power applications. Furthermore the coupling of PV / T collectors with a solar still led to a consequent increase in the production of distilled water.
Diplôme : Doctorat en sciences En ligne : ../theses/gclim/SOT7317.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10967 Modes de conversion de l’énergie solaire (Conversions photothermique et photovoltaïque) Et Leurs utilisations dans l’habitat. [texte imprimé] / Oualid Sotehi, Auteur ; Abla Chaker, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 209 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Génie ClimatiqueTags : conversion photothermique photovoltaïque systèmes solaires actifs et passifs maison solaire de Boussaâda collecteurs CPC collecteurs hybrides PV/T à eau distillation solaire photothermal photovoltaic active and passive solar systems Boussaâda solar house CPC collectors hybrid PV/T water collectors solar distillation التحويل الطاقة الحرارية الضوئية الطاقة الكهرو الضوئية الأنظمة الشمسية النشطة والغير
نشطة المنزل الشمسي بوسعادة لاقط ذو تركيز CPCلاقط هجين PV/Tالتقطير الشمسيIndex. décimale : 626 Génie Climatique Résumé : The energy consumption of the building sector in Algeria accounts for most of the energy produced in the country. An action to reduce the impact of this sector on the economy and the environment must be undertaken. The use of solar energy is a serious candidate for an effective and sustainable solution. The objective of our work is to carry out a study on the use of solar energy in buildings. The study of different active and passive solar systems and processes that can be integrated has demonstrated the possibility of a large number of solutions. A solar house of the solar village built in Boussaâda is chosen to conduct calculations in three different climates of Algeria. The simulation results of the passive systems show that if the use of passive devices such as solar walls and glazed surfaces can achieve significant energy savings (although considered insufficient), improving the thermal performance of the structure and glazed surfaces according to the passivhauss standard could lead to a greater decrease in heating and cooling needs. A house with low energy consumption is obtained for the cities of Algiers and Constantine. The performance of active systems is also studied. A comparison between different solar collectors to meet domestic hot water needs shows that CPC collectors are the most efficient. Nevertheless, if the electrical production of the hybrid PV/T water collectors is taken into consideration, they present a suitable and elegant solution for a possible integration. These collectors can be chosen to ensure the operation of the absorption and adsorption refrigeration systems and to cover all the energy needs of the solar house. The results obtained further show that the adsorption systems are more efficient than the absorption systems for low power applications. Furthermore the coupling of PV / T collectors with a solar still led to a consequent increase in the production of distilled water.
Diplôme : Doctorat en sciences En ligne : ../theses/gclim/SOT7317.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10967 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité SOT/7317 SOT/7317 Thèse Bibliothèque principale Thèses Disponible
Titre : Contribution à l’étude théorique des transferts thermiques convectifs dans un nanofluide : Application aux modèles monophasique et diphasique Type de document : texte imprimé Auteurs : Asma Lamri Zeggar, Auteur ; T. Boufendi, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2014 Importance : 137 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Photothermique Simulation numérique Convection forcée Convection mixte Conduit annulaire nanofluide (eau / Al2O3) Numerical simulation forced convection Mixed Convection annulus duct nanofluid (water/Al2O3) الحمل القسري الحمل المختلط الإنسياب الرقائقي أسطوانتين متمركزتين نانوفلويد)ماء/ Al2O3) Index. décimale : 530 Physique Résumé : This research is a 3D computer simulation of fluid flows, combined to heat transfer in a forced and mixed convection mode, for a permanent and steady laminar flow through an annular duct made up of two horizontal and concentric cylinders. While the inner cylinder is adiabatic, the outer cylinder is subjected to a constant parietal heating. The annulus duct is traversed by a nanofluid laminar flow composed of a fluid base (water) and nanoparticles of aluminum oxide Al2O3 with constant physical properties regarded as incompressible and
Newtonian. This physical problem is modeled by mass conservation equations, by movement and energy amounts in a cylindrical coordinate system accompanied by appropriate boundary conditions. Different approaches were developed, such as the monophasic and the biphasic approaches, to which belong the fluid volume models, the mixing model and the Eulerian model.
These equation systems were solved as to the single-phase model by means of the finite volume method with a second-order spatial and temporal precision and the SIMPLER algorithm for the sequential solution of equations. The dynamic and thermal fields are obtained for various Reynolds number values, ranging from 500 to 2000, reaching (1%, 4%,8%) for different concentrations of nanoparticles, and between (0, 104 and 105) for different numbers of Grashof. The results show that the nanofluid behavior, whether in a forced convection mode or in mixed convection mode are, from both a hydrodynamic and a thermal points of view, characteristics of a trend similar to the behavior of a conventional fluid. In a forced convection, dynamic and thermal fields reflect radial velocity and temperature
gradients, as well as a Nusselt number with asymptotic behavior at the output. In a mixed convection, the cell structure and the lamination temperatures through a straight section appear with an increasing number of Grashof, giving rise therefore to an increase in the Nusselt number, and thus to a better heat transfer.
Diplôme : Magistère En ligne : ../theses/physique/LAM6729.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9894 Contribution à l’étude théorique des transferts thermiques convectifs dans un nanofluide : Application aux modèles monophasique et diphasique [texte imprimé] / Asma Lamri Zeggar, Auteur ; T. Boufendi, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2014 . - 137 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Photothermique Simulation numérique Convection forcée Convection mixte Conduit annulaire nanofluide (eau / Al2O3) Numerical simulation forced convection Mixed Convection annulus duct nanofluid (water/Al2O3) الحمل القسري الحمل المختلط الإنسياب الرقائقي أسطوانتين متمركزتين نانوفلويد)ماء/ Al2O3) Index. décimale : 530 Physique Résumé : This research is a 3D computer simulation of fluid flows, combined to heat transfer in a forced and mixed convection mode, for a permanent and steady laminar flow through an annular duct made up of two horizontal and concentric cylinders. While the inner cylinder is adiabatic, the outer cylinder is subjected to a constant parietal heating. The annulus duct is traversed by a nanofluid laminar flow composed of a fluid base (water) and nanoparticles of aluminum oxide Al2O3 with constant physical properties regarded as incompressible and
Newtonian. This physical problem is modeled by mass conservation equations, by movement and energy amounts in a cylindrical coordinate system accompanied by appropriate boundary conditions. Different approaches were developed, such as the monophasic and the biphasic approaches, to which belong the fluid volume models, the mixing model and the Eulerian model.
These equation systems were solved as to the single-phase model by means of the finite volume method with a second-order spatial and temporal precision and the SIMPLER algorithm for the sequential solution of equations. The dynamic and thermal fields are obtained for various Reynolds number values, ranging from 500 to 2000, reaching (1%, 4%,8%) for different concentrations of nanoparticles, and between (0, 104 and 105) for different numbers of Grashof. The results show that the nanofluid behavior, whether in a forced convection mode or in mixed convection mode are, from both a hydrodynamic and a thermal points of view, characteristics of a trend similar to the behavior of a conventional fluid. In a forced convection, dynamic and thermal fields reflect radial velocity and temperature
gradients, as well as a Nusselt number with asymptotic behavior at the output. In a mixed convection, the cell structure and the lamination temperatures through a straight section appear with an increasing number of Grashof, giving rise therefore to an increase in the Nusselt number, and thus to a better heat transfer.
Diplôme : Magistère En ligne : ../theses/physique/LAM6729.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9894 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité LAM/6729 LAM/6729 Thèse Bibliothèque principale Thèses Disponible
Titre : Contribution a l’etude des transferts de chaleur et de masse au sein d’un espace annulaire elliptique d’axe horizontal Type de document : texte imprimé Auteurs : Abdelkarim Bouras, Auteur ; Mahfoud Djezzar, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2015 Importance : 105 f. Format : 30 cm. Note générale : 2 copies imprimes disponibles Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Physique Energétique Photothermique convection naturelle thermosolutale approximation de Boussinesq formulation vorticité-fonction de courant coordonnées elliptiques Thermosolutal natural convection Boussinesq Approximation vorticity-stream function formulation elliptic coordinates الحمل الحراري-الكتلي الطبیعي تقریب بوسینسك صیغة التدویم- دالة تیار الإحداثیات الإھلیلیجیة Index. décimale : 530 Physique Résumé : In this investigation the author presents a numerical study of heat and mass
transfer by natural convection in an annular space delimited by two horizontal
and confocal elliptical cylinders filled with a Newtonian fluid in laminar and
steadystate regime. The phenomenon of thermosolutale convection is governed
by the equationsof mass conservation, equations of momentum, energy and
concentration expressed in a coordinate system called "elliptical" to facilitate
writing boundary conditions and transform the area into a curved rectangular
field. The two elliptical walls of the isothermal enclosure, with a constant
concentration, T1 and C1 to the inner wall, T2 and C2 to the outer wall, with T1>
T2 and C1> C2.
Using the Boussinesq approximation and the vorticity-stream function
formulation, we study the influence of the main control parameters: the Rayleigh
number (Ra), the Lewis number (Le), the Prandtl number (Pr), the buoyancy
ratio (N) and the internal volume of eccentricity (e1) on the structure of the flow
and, on heat and mass transfer rates.Diplôme : Doctorat en sciences En ligne : ../theses/physique/BOU6836.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10128 Contribution a l’etude des transferts de chaleur et de masse au sein d’un espace annulaire elliptique d’axe horizontal [texte imprimé] / Abdelkarim Bouras, Auteur ; Mahfoud Djezzar, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2015 . - 105 f. ; 30 cm.
2 copies imprimes disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Physique Energétique Photothermique convection naturelle thermosolutale approximation de Boussinesq formulation vorticité-fonction de courant coordonnées elliptiques Thermosolutal natural convection Boussinesq Approximation vorticity-stream function formulation elliptic coordinates الحمل الحراري-الكتلي الطبیعي تقریب بوسینسك صیغة التدویم- دالة تیار الإحداثیات الإھلیلیجیة Index. décimale : 530 Physique Résumé : In this investigation the author presents a numerical study of heat and mass
transfer by natural convection in an annular space delimited by two horizontal
and confocal elliptical cylinders filled with a Newtonian fluid in laminar and
steadystate regime. The phenomenon of thermosolutale convection is governed
by the equationsof mass conservation, equations of momentum, energy and
concentration expressed in a coordinate system called "elliptical" to facilitate
writing boundary conditions and transform the area into a curved rectangular
field. The two elliptical walls of the isothermal enclosure, with a constant
concentration, T1 and C1 to the inner wall, T2 and C2 to the outer wall, with T1>
T2 and C1> C2.
Using the Boussinesq approximation and the vorticity-stream function
formulation, we study the influence of the main control parameters: the Rayleigh
number (Ra), the Lewis number (Le), the Prandtl number (Pr), the buoyancy
ratio (N) and the internal volume of eccentricity (e1) on the structure of the flow
and, on heat and mass transfer rates.Diplôme : Doctorat en sciences En ligne : ../theses/physique/BOU6836.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10128 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/6836 BOU/6836 Thèse Bibliothèque principale Thèses Disponible
