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Etude Des Transferts De Chaleur Et De Matiere En Convection Forcee Dans Une Operation De Sechage En Lit Epais De Produits Agricoles Tropicaux
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Book Synopsis ETUDE DES TRANSFERTS DE CHALEUR ET DE MATIERE EN CONVECTION FORCEE DANS UNE OPERATION DE SECHAGE EN LIT EPAIS DE PRODUITS AGRICOLES TROPICAUX by : Jean Nganhou
Download or read book ETUDE DES TRANSFERTS DE CHALEUR ET DE MATIERE EN CONVECTION FORCEE DANS UNE OPERATION DE SECHAGE EN LIT EPAIS DE PRODUITS AGRICOLES TROPICAUX written by Jean Nganhou and published by . This book was released on 1987 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: ON ENVISAGE DEUX TYPES DE CONFIGURATION DU SYSTEME DE SECHAGE SUIVANT LA NATURE DU GENERATEUR D'AIR CHAUD. DANS LA PREMIERE CONFIGURATION, LE SECHOIR EST VENTILE PAR DE L'AIR CHAUD SORTANT D'UN CAPTEUR SOLAIRE DU TYPE MULTI-MASSE. LA SECONDE CONFIGURATION UTILISE UN RECHAUFFEUR D'AIR CONSTITUE DE RESISTANCES ELECTRIQUES. POUR CHAQUE SOUS-SYSTEME DE LA CHAINE, ON PROPOSE UNE MODELISATION FINE ET ORIGINALE; UNE ETUDE SYSTEMATIQUE DE L'ETAT THERMIQUE, MASSIQUE ET DES PERFORMANCES DU SYSTEME DE CAPTATION MULTI-PASSES ET DU SYSTEME DE SECHAGE EN FONCTION DES PARAMETRES EXTERNES ET INTERNES EST REALISEE. ON ENVISAGE AUSSI L'EFFET D'UN RECYCLAGE DE L'AIR SUR LE COMPORTEMENT DYNAMIQUE DU SYSTEME DE SECHAGE. ENFIN, UNE CONFORMATION ENTRE LES RESULTATS EXPERIMENTAUX OBTENUS SUR UN PROTOTYPE CONSTRUIT ET TESTE EN LABORATOIRE AVEC DES RESISTANCES ELECTRIQUES PERMET UNE VALIDATION DU MODELE THEORIQUE PROPOSE POUR LE SECHAGE D'UN LIT EPAIS DES FEVES DE CACAO
Book Synopsis Contribution à l'étude des transferts de chaleur et de matière en convection forcée lors du séchage d'un lit épais de céréales by : Ali Il- Idrissi
Download or read book Contribution à l'étude des transferts de chaleur et de matière en convection forcée lors du séchage d'un lit épais de céréales written by Ali Il- Idrissi and published by . This book was released on 1986 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: MODELE MATHEMATIQUE DES GRANDEURS THERMODYNAMIQUES DECRIVANT DES PHENOMENES COUPLES EN MILIEU POREUX POUR DECRIRE LE TRANSFERT DE MASSE ET D'ENERGIE. ON DEFINIT UNE EPAISSEUR OPTIMALE DU LIT DE CEREALE A SECHER. ON PROPOSE EGALEMENT UN SECHAGE EN LIT EPAIS MULTICOUCHE AVEC REGENERATION INTERCALEE
Book Synopsis Séchage d'un matériau poreux humide par convection forcée d'air chaud by : Hamed Amir
Download or read book Séchage d'un matériau poreux humide par convection forcée d'air chaud written by Hamed Amir and published by . This book was released on 1985 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: MODELE DE SECHAGE PERMETTANT DE DETERMINER SIMULTANEMENT LES DISTRIBUTIONS DE TEMPERATURE ET D'HUMIDITE DANS LA COUCHE LIMITE ET LE PRODUIT. ETUDE DU CAS PARTICULIER DU SECHAGE SUPERFICIEL EN REGIME PERMANENT. ETUDE DU SECHAGE VOLUMIQUE EN REGIME TRANSITOIRE. DISCRETISATION ET RESOLUTION NUMERIQUE DES EQUATIONS. APPLICATION AU SECHAGE SOLAIRE
Book Synopsis Optimisation sous contraintes d'une opération de séchage combinant la convection et les technologies rayonnantes infrarouges by : Nadine Allanic
Download or read book Optimisation sous contraintes d'une opération de séchage combinant la convection et les technologies rayonnantes infrarouges written by Nadine Allanic and published by . This book was released on 2006 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse porte sur le séchage d'un polymère (alcool polyvinylique, PVA) en solution aqueuse associé à un plastifiant et divers additifs. Un chauffage combinant des apports d'énergie par convection et par rayonnement électromagnétique de type infrarouge court est exploité. L'utilisation des infrarouges qui permettent un transfert d'énergie direct et élevé au produit s'avère intéressante à condition de bien quantifier l'impact de l'éclairement infrarouge sur le comportement thermo-hydrique du produit. Dans cette optique, une étude expérimentale et une étude numérique ont été menées. Après avoir caractérisé par différentes mesures les principales propriétés du polymère, des expérimentations ont été réalisées sur un séchoir pilote. L'analyse des cinétiques de séchage a montré la nécessité de développer un modèle de connaissance du comportement thermo-hydrique du produit afin de passer ensuite à une phase d'optimisation du procédé. En parallèle à cette étude expérimentale, un modèle unidimensionnel représentatif des mécanismes gouvernant les transferts de masse et de chaleur au sein du produit a donc été développé. Il permet d'accéder au champ de teneur en eau et à la température au sein du produit, tout en prenant en compte le retrait de la matière. Différentes approches mathématiques ont été envisagées notamment pour s'affranchir des difficultés de résolution liées au retrait de la matière au cours du séchage. La connaissance du coefficient de diffusion en fonction de la température et de la teneur en eau est nécessaire pour une représentation satisfaisante des phénomènes par le modèle. L'estimation de ce paramètre a été réalisée par méthode inverse à partir de cinétiques de séchage en convection forcée. Différentes expérimentations ont servi pour valider ce modèle. A partir du modèle ainsi développé, une approche de type commande optimale a été retenue pour optimiser le procédé de séchage. L'éclairement infrarouge à appliquer au produit est déterminé hors ligne par la minimisation d'une fonctionnelle qui prend en compte des critères au niveau du procédé, notamment la réduction du temps de séchage et le coût énergétique, ainsi que des contraintes sur le produit (température et teneur en eau).
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 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 Biodiversity and Sustainable Development by : Rabindra Nath Pati
Download or read book Biodiversity and Sustainable Development written by Rabindra Nath Pati and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers presented at the First Global Summit on Sustainable Development and Biodiversity, held at Raipur during 7-9 February 2009.
Book Synopsis Underground Disposal of Radioactive Wastes by : International Atomic Energy Agency
Download or read book Underground Disposal of Radioactive Wastes written by International Atomic Energy Agency and published by . This book was released on 1981 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plant Ecology written by Unesco and published by . This book was released on 1955 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Goa and Portugal by : Charles J. Borges
Download or read book Goa and Portugal written by Charles J. Borges and published by Concept Publishing Company. This book was released on 1997 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collection of twenty-one papers presented at an international symposium on the theme "cultural relations between Portugal and Goa" at the University of Cologne, 29 May-2 June 1996; chiefly covers the 16th-18th centuries.
Book Synopsis Radioactive Waste Management and Regulation by : Mason Willrich
Download or read book Radioactive Waste Management and Regulation written by Mason Willrich and published by . This book was released on 1977 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses the nature of post-fission radioactive waste, the operations that spent fuel goes through after it is discharged from a reactor, and the problem of waste management.
Book Synopsis The Problems of the Arid Zone by : Unesco
Download or read book The Problems of the Arid Zone written by Unesco and published by paris. This book was released on 1962 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Climatology written by Unesco and published by . This book was released on 1958 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Convention on Biological Diversity by : United States. Congress. Senate. Committee on Foreign Relations
Download or read book Convention on Biological Diversity written by United States. Congress. Senate. Committee on Foreign Relations and published by . This book was released on 1994 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Climatologie Et Microclimatologie by : Unesco
Download or read book Climatologie Et Microclimatologie written by Unesco and published by . This book was released on 1958 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Physiology and Psychology in Arid Conditions by : Unesco
Download or read book Environmental Physiology and Psychology in Arid Conditions written by Unesco and published by paris. This book was released on 1964 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
