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Etude Du Refroidissement Par Convection Forcee Externe Dun Moteur Electrique
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Book Synopsis Etude du refroidissement par convection forcée externe d'un moteur électrique by : Khaddouj Farsane
Download or read book Etude du refroidissement par convection forcée externe d'un moteur électrique written by Khaddouj Farsane and published by . This book was released on 1996 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail concerne l'étude du refroidissement par convection forcée externe de moteurs électriques de type fermé. Cette étude est dans un premier temps menée expérimentalement, en associant trois techniques d'investigation complémentaires, à savoir la visualisation de l'écoulement par tomographie laser, la vélocimétrie laser Doppler et la thermographie infrarouge. Les premiers résultats, obtenus sur un moteur déjà commercialisé, mettent en évidence les défauts de répartition des flux d'air autour du carter, ainsi que la présence de différentes zones chaudes à la surface du moteur. Ces résultats ont débouché sur l'élaboration d'une nouvelle configuration de carter, concrétisée par la conception de deux moteurs prototypes. Le diagnostic de ces deux nouveaux moteurs met en évidence une amélioration sensible de l'irrigation du carter, se traduisant par une diminution significative du niveau de température surfacique. Par ailleurs, les données issues de cette investigation expérimentale sont utilisées pour déterminer les coefficients d'échange convectif à la paroi du carter. Un dimensionnement des ailettes définissant la surface d'échange est alors possible. La procédure de dimensionnement proposée consiste à déterminer les valeurs optimales de la hauteur d'ailette et de l'épaisseur à la base, définies par le volume d'ailette minimal pour un flux de chaleur à évacuer donné. Les valeurs optimales avancées laissent entrevoir un gain appréciable sur la masse totale des ailettes. Parallèlement à cette étude expérimentale, un outil numérique a été développé dans le but de modéliser à terme le refroidissement par convection forcée entre les ailettes du carter. Pour cela, l'adaptation d'un code de calcul par éléments finis (Flux-Expert) à la modélisation des transferts thermique a été réalisée. L'étude est menée en bidimensionnel, pour un régime permanent et en couplant les phénomènes aérauliques et thermiques. L'écoulement est de plus supposé incompressible. Enfin la turbulence de l'écoulement est prise en compte par un modèle k-e. Les équations programmées sont validées pour plusieurs configurations tests d'écoulements, en régimes laminaire et turbulent.
Book Synopsis CONTRIBUTION A L'ETUDE DES CONDITIONS D'ECOULEMENT DANS LE CIRCUIT DE REFROIDISSEMENT D'UN MOTEUR ELECTRIQUE DE TYPE OUVERT by : Bernard Baudoin
Download or read book CONTRIBUTION A L'ETUDE DES CONDITIONS D'ECOULEMENT DANS LE CIRCUIT DE REFROIDISSEMENT D'UN MOTEUR ELECTRIQUE DE TYPE OUVERT written by Bernard Baudoin and published by . This book was released on 1987 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE DU TRANSFERT DE CHALEUR DANS LES CANAUX VALORIQUES EN FONCTION DE LA STRUCTURE DU SYSTEME DE REFROIDISSEMENT PAR AIR. CONSTRUCTION D'UN MODELE THERMOCINETIQUE DU MOTEUR. ETUDE EXPERIMENTALE DU CHAMP DE PRESSION DANS LE MOTEUR
Book Synopsis Etude de la convection aux petites échelles : application au refroidissement des composants électroniques by : Ahlem Arfaoui Omrani
Download or read book Etude de la convection aux petites échelles : application au refroidissement des composants électroniques written by Ahlem Arfaoui Omrani and published by . This book was released on 2009 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Durant ces dernières années, le besoin d’améliorer les techniques de refroidissement a élargie le champ de la recherche concernant le transfert thermique. Il est à noter que la convection naturelle est utilisée pour les systèmes de faible puissance et de densités de flux réduite. Le refroidissement des systèmes de forte puissance et à grande échelle nécessite une dissipation thermique plus élevée, raison pour laquelle la convection forcée est la plus appropriée dans la plupart des cas. Bien que le refroidissement de certains composants de forte puissance se fasse de plus en plus avec écoulement d’un liquide ou avec changement de phase, le refroidissement par écoulement d’air demeure encore très utilisé. Le refroidissement par air est la méthode traditionnelle la plus utilisée grâce à son moindre coût et sa fiabilité. Malgré que les ventilateurs soient très utilisés pour extraire l'air de l'intérieur d'un boîtier électronique, il existe beaucoup de problèmes qui les laissent indésirable, à savoir : leur nuisance sonore, les vibrations qu'ils introduisent et que le manque d'espace pour les installer. Ce travail de thèse propose d'implanter des perturbateurs d'écoulement qui guident le flux d'air circulant vers les zones les plus critiques quand il n’y a pas assez de place pour installer un radiateur à ailettes ou un ventilateur sur le composant. Nous menons ici une étude numérique et expérimentale afin d'analyser l'influence de certains paramètres liées aux déflecteurs (angle d'inclinaison, hauteur, longueur, distance entre les déflecteurs ...) sur le l'augmentation du transfert de chaleur et l'amélioration du refroidissement
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Book Synopsis Dictionary of Building and Civil Engineering by : Don Montague
Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Book Synopsis Gas-cooled Nuclear Reactors by : France. Commissariat à l'énergie atomique
Download or read book Gas-cooled Nuclear Reactors written by France. Commissariat à l'énergie atomique and published by . This book was released on 2006 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Faecal Sludge Management by : Linda Strande
Download or read book Faecal Sludge Management written by Linda Strande and published by IWA Publishing. This book was released on 2014-08-15 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.
Book Synopsis From Microphysics to Macrophysics by : Roger Balian
Download or read book From Microphysics to Macrophysics written by Roger Balian and published by Springer Science & Business Media. This book was released on 2007-06-26 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: This popular, often cited text returns in a softcover edition to provide a thorough introduction to statistical physics and thermodynamics, and to exhibit the universal chain of ideas leading from the laws of microphysics to the macroscopic behaviour of matter. A wide range of applications illustrates the concepts, and many exercises reinforce understanding. Volume II applies statistical methods to systems governed by quantum effects, in particular to solid state physics, explaining properties due to the crystal structure or to the lattice excitations or to the electrons. The last chapters are devoted to non-equilibrium processes and to kinetic equations, with many applications included.
Book Synopsis Four Laws That Drive the Universe by : Peter Atkins
Download or read book Four Laws That Drive the Universe written by Peter Atkins and published by OUP Oxford. This book was released on 2007-09-06 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: The laws of thermodynamics drive everything that happens in the universe. From the sudden expansion of a cloud of gas to the cooling of hot metal, and from the unfurling of a leaf to the course of life itself - everything is directed and constrained by four simple laws. They establish fundamental concepts such as temperature and heat, and reveal the arrow of time and even the nature of energy itself. Peter Atkins' powerful and compelling introduction explains what the laws are and how they work, using accessible language and virtually no mathematics. Guiding the reader from the Zeroth Law to the Third Law, he introduces the fascinating concept of entropy, and how it not only explains why your desk tends to get messier, but also how its unstoppable rise constitutes the engine of the universe.
Book Synopsis The Boundaries of the West African Craton by : Nasser Ennih
Download or read book The Boundaries of the West African Craton written by Nasser Ennih and published by Geological Society of London. This book was released on 2008 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fundamentals of Latex Film Formation by : Joseph Keddie
Download or read book Fundamentals of Latex Film Formation written by Joseph Keddie and published by Springer Science & Business Media. This book was released on 2010-02-18 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has emerged out of our long-time research interests on the topic of latex film formation. Over the years we have built up a repertoire of slides used in conference presentations, short courses and tutorials on the topic. The story presented in this book has thereby taken shape as it has been told and re-told to a mix of academic and industrial audiences. The book presents a wide body of work accumulated by the polymer colloids community over the past five decades, but the selection of examples has been flavoured by our particular experimental interests and development of mathematical models. We intend the book to be a starting point for academic and industrial scientists beginning research on latex film formation. The emphasis is on fundam- tal mechanisms, however, and not on applications nor on specific effects of formu- tions. We hope that the book consolidates the understanding that has been achieved to-date in the literature in a more comprehensive way than is possible in a review article. We trust that the reader will appreciate the fascination of the topic.
Book Synopsis Cellular Automata Modeling of Physical Systems by : Bastien Chopard
Download or read book Cellular Automata Modeling of Physical Systems written by Bastien Chopard and published by Cambridge University Press. This book was released on 2005-06-30 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a self-contained introduction to cellular automata and lattice Boltzmann techniques. Beginning with a chapter introducing the basic concepts of this developing field, a second chapter describes methods used in cellular automata modeling. Following chapters discuss the statistical mechanics of lattice gases, diffusion phenomena, reaction-diffusion processes and non-equilibrium phase transitions. A final chapter looks at other models and applications, such as wave propagation and multiparticle fluids. With a pedagogic approach, the volume focuses on the use of cellular automata in the framework of equilibrium and non-equilibrium statistical physics. It also emphasises application-oriented problems such as fluid dynamics and pattern formation. The book contains many examples and problems. A glossary and a detailed bibliography are also included. This will be a valuable book for graduate students and researchers working in statistical physics, solid state physics, chemical physics and computer science.
Book Synopsis Philostratus by : Philostratus (the Athenian)
Download or read book Philostratus written by Philostratus (the Athenian) and published by . This book was released on 1912 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Nihon Genshiryoku Kenkyūjo Publisher :Paris, France : Nuclear Energy Agency, Organisation for Economic Co-operation and Development ISBN 13 : Total Pages :370 pages Book Rating :4.3/5 (91 download)
Book Synopsis Basic Studies in the Field of High-temperature Engineering by : Nihon Genshiryoku Kenkyūjo
Download or read book Basic Studies in the Field of High-temperature Engineering written by Nihon Genshiryoku Kenkyūjo and published by Paris, France : Nuclear Energy Agency, Organisation for Economic Co-operation and Development. This book was released on 2002 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: In response to increasing interest in high-temperature, gas-cooled reactors (HTGRs) in many countries and the need for improved materials for nuclear applications in high-temperature environments, the NEA organised a Second Information Exchange Meeting on Basic Studies in the Field of High-temperature Engineering. These proceedings provide an overview of the activities being carried out in eight countries, the improvement of material properties for HTGR application, in-core monitoring methods and properties of irradiated graphite, and HTGR fuel fabrication and performance.
Book Synopsis How to Design Wastewater Systems for Local Conditions in Developing Countries by : David M. Robbins
Download or read book How to Design Wastewater Systems for Local Conditions in Developing Countries written by David M. Robbins and published by IWA Publishing. This book was released on 2014-03-15 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a practical handbook providing a step-by-step approach to the techniques used for characterizing wastewater sources and investigating sites where collection, treatment and reuse/disposal technologies will be installed. It is intended to help enable local implementation of on-site and decentralized wastewater management system (DWMS)for wide scale use in development settings. How to Design Wastewater Systems for Local Conditions in Developing Countries helps local service providers and regulatory officials make informed decisions through the use of tools, checklists and case studies. It includes a link to a web based community of on-site and decentralized wastewater professionals, which contains related tools and case studies. This handbook serves as a reference for training classes, certification programs, and higher education programs in civil and sanitary engineering. There is an increasing interest on the part of local government officials and private sector service providers to implement wastewater treatment systems to solve sanitation problems. The model presented in this handbook promotes activities that first generate data related to source and site conditions that represent critical inputs, and then applies this information to the technology selection process. Matching the most appropriate technologies to the specific needs of the wastewater project is the key that leads to long term sustainability. How to Design Wastewater Systems for Local Conditions in Developing Countries is an invaluable resource for public sector decision makers and private sector service providers in developing countries. It is also a useful text for students at engineering colleges in developing countries interested in taking a class that teaches the methods of decentralized wastewater management system (DWMS) development.
Book Synopsis Compendium of Sanitation Systems and Technologies by : Elizabeth Tilley
Download or read book Compendium of Sanitation Systems and Technologies written by Elizabeth Tilley and published by . This book was released on 2014 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analecta: Or, Materials For a History of Remarkable Providences; Mostly Relating to Scotch Ministers and Christians by : Robert Wodrow
Download or read book Analecta: Or, Materials For a History of Remarkable Providences; Mostly Relating to Scotch Ministers and Christians written by Robert Wodrow and published by BoD – Books on Demand. This book was released on 2024-05-25 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reprint of the original, first published in 1842.
