CONTRIBUTION A L'ETUDE DES TRANSFERTS THERMIQUES COUPLES A L'INTERIEUR DE PANNEAUX EMETTEURS INFRAROUGES PDF Download
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Book Description
L'ETUDE DES ECHANGES THERMIQUES COUPLES A L'INTERIEUR DE PANNEAUX INFRAROUGES DE SECHAGE DU PAPIER, NOUS A MENE A DEFINIR UNE MECANIQUE DE COUPLAGE. CELLE-CI CONSISTE A DEVELOPPER CHAQUE MODE DE TRANSFERT SEPAREMENT, EN FONCTION DES CONDITIONS DE SURFACE, ET A REALISER LE COUPLAGE AUX INTERFACES A L'AIDE D'UN BILAN ENERGETIQUE. LES ECHANGES PAR RAYONNEMENT SONT TRAITES PAR UNE METHODE DES RADIOSITES GENERALEMENT ADAPTEE AUX ENCEINTES CONSTITUEES DE SURFACES OPAQUES ET QUE NOUS GENERALISONS AUX PAROIS SEMI-TRANSPARENTES. EN EFFET, LES CASSETTES INFRAROUGES CONTIENNENT DES ELEMENTS SEMI-TRANSPARENTS SOLIDES TELS QUE LE QUARTZ ET LA VITROCERAMIQUE. CES MATERIAUX CONSTITUENT UN INTERMEDIAIRE ENTRE LA SOURCE DE RAYONNEMENT ET LE RECEPTEUR ET ONT UNE INFLUENCE IMPORTANTE SUR LE RENDEMENT DU PANNEAU. AFIN D'EVALUER AVEC PRECISION LES DISSIPATIONS ENERGETIQUES DANS CES MILIEUX, NOUS TRAITONS SEMI-ANALYTIQUEMENT LES ECHANGES DE CHALEUR COMBINES RAYONNEMENT-CONDUCTION DANS LA PAROI SEMI-TRANSPARENTE. CETTE METHODE RESTREINTE AUX ECHANGES MONODIMENSIONNELS, S'APPLIQUE AUX MILIEUX NON GRIS SOUMIS A DES CONDITIONS D'ECHANGES PAR RAYONNEMENT ET CONVECTION. DEUX MODELES SONT PRESENTES, L'UN BASE SUR DES ECHANGES PAR CONDUCTION ET CONVECTION SIMPLIFIES, L'AUTRE S'APPUYANT SUR DES CODES NUMERIQUES DE MECANIQUE DES FLUIDES ET DE CONDUCTION. TOUS DEUX SONT COUPLES AU MODELE DE RAYONNEMENT CITE PRECEDEMMENT ET ONT ETE VALIDES SUR UNE MAQUETTE DE LABORATOIRE. LE DERNIER MODELE SIMULE EN 3D UN PANNEAU INDUSTRIEL.
Book Description
L'ETUDE DES ECHANGES THERMIQUES COUPLES A L'INTERIEUR DE PANNEAUX INFRAROUGES DE SECHAGE DU PAPIER, NOUS A MENE A DEFINIR UNE MECANIQUE DE COUPLAGE. CELLE-CI CONSISTE A DEVELOPPER CHAQUE MODE DE TRANSFERT SEPAREMENT, EN FONCTION DES CONDITIONS DE SURFACE, ET A REALISER LE COUPLAGE AUX INTERFACES A L'AIDE D'UN BILAN ENERGETIQUE. LES ECHANGES PAR RAYONNEMENT SONT TRAITES PAR UNE METHODE DES RADIOSITES GENERALEMENT ADAPTEE AUX ENCEINTES CONSTITUEES DE SURFACES OPAQUES ET QUE NOUS GENERALISONS AUX PAROIS SEMI-TRANSPARENTES. EN EFFET, LES CASSETTES INFRAROUGES CONTIENNENT DES ELEMENTS SEMI-TRANSPARENTS SOLIDES TELS QUE LE QUARTZ ET LA VITROCERAMIQUE. CES MATERIAUX CONSTITUENT UN INTERMEDIAIRE ENTRE LA SOURCE DE RAYONNEMENT ET LE RECEPTEUR ET ONT UNE INFLUENCE IMPORTANTE SUR LE RENDEMENT DU PANNEAU. AFIN D'EVALUER AVEC PRECISION LES DISSIPATIONS ENERGETIQUES DANS CES MILIEUX, NOUS TRAITONS SEMI-ANALYTIQUEMENT LES ECHANGES DE CHALEUR COMBINES RAYONNEMENT-CONDUCTION DANS LA PAROI SEMI-TRANSPARENTE. CETTE METHODE RESTREINTE AUX ECHANGES MONODIMENSIONNELS, S'APPLIQUE AUX MILIEUX NON GRIS SOUMIS A DES CONDITIONS D'ECHANGES PAR RAYONNEMENT ET CONVECTION. DEUX MODELES SONT PRESENTES, L'UN BASE SUR DES ECHANGES PAR CONDUCTION ET CONVECTION SIMPLIFIES, L'AUTRE S'APPUYANT SUR DES CODES NUMERIQUES DE MECANIQUE DES FLUIDES ET DE CONDUCTION. TOUS DEUX SONT COUPLES AU MODELE DE RAYONNEMENT CITE PRECEDEMMENT ET ONT ETE VALIDES SUR UNE MAQUETTE DE LABORATOIRE. LE DERNIER MODELE SIMULE EN 3D UN PANNEAU INDUSTRIEL.
Author: Alain Le Bail Publisher: ISBN: Category : Languages : fr Pages : 190
Book Description
ON SE PROPOSE D'ETUDIER LES TRANSFERTS DE CHALEUR COUPLES INTERVENANT DANS LES FOURS HIP FONCTIONNANT A TRES HAUTE PRESSION ET HAUTE TEMPERATURE. L'ETUDE PORTE PLUS PARTICULIEREMENT SUR LA CARACTERISATION, DANS CES CONDITIONS EXTREMES, DES PROPRIETES DU FLUIDE DE TRAVAIL (L'ARGON) ET DE L'ISOLANT FIBREUX (FEUTRE DE CARBONE) CONSTITUANT LE CALORIFUGEAGE DE L'ENCEINTE HAUTE TEMPERATURE. L'ETUDE S'EST ATTACHEE A CARACTERISER LES PROPRIETES THERMOPHYSIQUES DU FLUIDE DE PRESSION (GAZ ARGON) A HAUTE TEMPERATURE ET A HAUTE PRESSION. DES MESURES DE CONDUCTIVITE THERMIQUE PAR UNE METHODE A FIL CHAUD EN REGIME TRANSITOIRE SONT PROPOSEES. L'ETUDE DE LA MORPHOLOGIE DU FEUTRE DE CARBONE EST COMPLETEE PAR LA DETERMINATION DU COEFFICIENT D'EXTINCTION PAR UNE VOIE EXPERIMENTALE (MESURE DE TRANSMITTIVITE) ET PAR DES CALCULS (THEORIE DE LA DIFFUSION DE MIE). DES MESURES DE LA CONDUCTIVITE THERMIQUE EFFECTIVE DU FEUTRE DE CARBONE DANS UN INTERVALLE DE TEMPERATURE COMPRIS ENTRE QUATRE CENTS ET HUIT CENTS KELVIN POUR DES PRESSIONS COMPRISES ENTRE UN MILLIBAR ET DEUX MILLE BARS SONT PRESENTEES. UN MODELE DE CONDUCTION DANS LA MATRICE FIBREUSE EST PROPOSE. LE MODELE PREND EN CONSIDERATION LES PHENOMENES DE CONSTRICTION ET DE RESISTANCE DE CONTACT ENTRE FIBRES DE MANIERE GLOBALE. UN PARAMETRE DE COUPLAGE PERMET D'ESTIMER L'IMPORTANCE DE CES PHENOMENES EN FONCTION DE LA PRESSION DE GAZ INTERSTITIEL
Author: Ahmed Belasri Publisher: Springer Nature ISBN: 9811554447 Category : Technology & Engineering Languages : en Pages : 659
Book Description
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.
Author: Don Montague Publisher: Taylor & Francis ISBN: 9780419199106 Category : Architecture Languages : en Pages : 472
Book Description
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.
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development Publisher: ISBN: 9789283600046 Category : Aeronautics Languages : en Pages :
Author: Wallace H. Tucker Publisher: ISBN: Category : Nature Languages : en Pages : 230
Book Description
Beyond the range of optical perception--and of ordinary imaginings--a new and violent universe lay undetected until the advent of space exploration. Supernovae, black holes, quasars and pulsars--these were the secrets of the highenergy world revealed when, for the first time, astronomers attached their instruments to rockets and lofted them beyond the earth's x-ray-absorbing atmosphere. The X-Ray Universe is the story of these explorations and the fantastic new science they brought into being. It is a first-hand account: Riccardo Giacconi is one of the principal pioneers of the field, and Wallace Tucker is a theorist who worked closely with him at many critical periods. The book carries the reader from the early days of the Naval Research Laboratory through the era of V-2 rocketry, Sputnik, and the birth of NASA, to the launching of the Einstein X-Ray Observatory. But this is by no means just a history. Behind the suspenseful, sometimes humorous details of human personality grappling with high technology lies a sophisticated exposition of current cosmology and astrophysics, from the rise and fall of the steady-state theory to the search for the missing mass of the universe.
Author: Agnes Buka Publisher: World Scientific ISBN: 1848167997 Category : Science Languages : en Pages : 299
Book Description
The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Author: Matthias Gross Publisher: Routledge ISBN: 1317964675 Category : Business & Economics Languages : en Pages : 427
Book Description
Once treated as the absence of knowledge, ignorance today has become a highly influential topic in its own right, commanding growing attention across the natural and social sciences where a wide range of scholars have begun to explore the social life and political issues involved in the distribution and strategic use of not knowing. The field is growing fast and this handbook reflects this interdisciplinary field of study by drawing contributions from economics, sociology, history, philosophy, cultural studies, anthropology, feminist studies, and related fields in order to serve as a seminal guide to the political, legal and social uses of ignorance in social and political life. Chapter 33 of this book is freely available as a downloadable Open Access PDF under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license available here: https://tandfbis.s3-us-west-2.amazonaws.com/rt-files/docs/Open+Access+Chapters/9780415718967_oachapter33.pdf
Author: Sébastien Forget Publisher: Springer ISBN: 3642367054 Category : Science Languages : en Pages : 179
Book Description
Organic lasers are broadly tunable coherent sources, potentially compact, convenient and manufactured at low-costs. Appeared in the mid 60’s as solid-state alternatives for liquid dye lasers, they recently gained a new dimension after the demonstration of organic semiconductor lasers in the 90's. More recently, new perspectives appeared at the nanoscale, with organic polariton and surface plasmon lasers. After a brief reminder to laser physics, a first chapter exposes what makes organic solid-state organic lasers specific. The laser architectures used in organic lasers are then reviewed, with a state-of-the-art review of the performances of devices with regard to output power, threshold, lifetime, beam quality etc. A survey of the recent trends in the field is given, highlighting the latest developments with a special focus on the challenges remaining for achieving direct electrical pumping of organic semiconductor lasers. A last chapter covers the applications of organic solid-state lasers.
Author: VALERIE.. MANIAS
Author: VALERIE.. MANIAS
Author: Alain Le Bail
Author: Ahmed Belasri
Author: Don Montague
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development
Author: Wallace H. Tucker
Author: Agnes Buka
Author: Matthias Gross
Author: Gábor Földiák
Author: Sébastien Forget