Book Description
La cinétique d'oxydation, d'auto-inflammation et de combustion en milieu pauvre et ultra-pauvre de trois hydrocarbures types représentatifs du comportement des carburants gazoles pour automobiles a été étudiée à haute pression (0,34 - 2,32 MPa) et basse température (600 - 950 K) : le n-butylbenzène pour les constituants aromatiques, le n-propylcyclohexane pour les naphténiques et le n-décane pour les paraffiniques. Une base exhaustive de données thermocinétiques expérimentales et théoriques a été élaborée. Les expériences d'auto-inflammation ont été réalisées avec une machine à compression rapide originale équipée d'une chaîne analytique performante. Des données globales de réactivité - délais et phénoménologie de l'auto-inflammation - ainsi que des données détaillées - identification et quantification des produits intermédiaires d'oxydation - ont permis de reconnaître et d'interpréter les voies prépondérantes d'auto-inflammation et de formation de polluants à basse température. Des schémas réactionnels complexes sont construits. Des modèles thermocinétiques sont développés et validés par les données originales. Des simulations numériques ont permis de prévoir l'effet de la recirculation des gaz brûlés (EGR) et le comportement en phase de compression. Ces travaux font partie d'un programme de quatre thèses destinées à élaborer les outils d'une optimisation du mode de combustion moteur par auto-inflammation homogène (mode HCCI pour Homogeneous Charge Compression Ignition), une alternative propre et prometteuse aux procédés conventionnels mais qui exige une connaissance approfondie des conditions d'auto-inflammation du carburant à basses températures.
Author: Claudine Picq Publisher: Bioversity International ISBN: Category : Agricultural productivity Languages : en Pages : 806
Book Description
Importance de la banane sur les plans economique et alimentaire; Diversite et dynamique des filieres; Organisation des marches et commercialisation; Systemes de productions/production systems.
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Flight Vehicle Integration Panel. Symposium Publisher: ISBN: Category : Helicopters Languages : en Pages : 402
Author: Bruno Notarnicola Publisher: Springer ISBN: 3319119400 Category : Technology & Engineering Languages : en Pages : 408
Book Description
The book presents an overview of the International practices and state-of-the-art of LCA studies in the agri-food sector, both in terms of adopted methodologies and application to particular products; the final purpose is to characterise and put order within the methodological issues connected to some important agri-food products (wine, olive oil, cereals and derived products, meat and fruit) and also defining practical guidelines for the implementation of LCAs in this particular sector. The first chapter entails an overview of the application of LCA to the food sector, the role of the different actors of the food supply chain and the methodological issues at a general level. The other chapters, each with a particular reference to the main foods of the five sectors under study, have a common structure which entails the review of LCA case studies of such agri-food products, the methodological issues, the ways with which they have been faced and the suggestion of practical guidelines.
Author: John Charles Robinson Publisher: CABI ISBN: 1845937384 Category : Technology & Engineering Languages : en Pages : 321
Book Description
Bananas and plantains are major fruit crops in the tropics and subtropics, making a vital contribution to the economies of many countries. In the last 15 years, substantial changes have occurred in banana production, among them the increased importance of fungal and viral diseases and their serious impact on Cavendish export cultivars, smallholder plantains and cooking bananas. Changes in production systems such as protected greenhouse cultivation, organic, fair-trade and integrated cultivation and their respective certification schemes have also become prominent. This book provides an accessi.
Author: Onofrio Romano Publisher: Routledge ISBN: 1351005928 Category : Business & Economics Languages : en Pages : 273
Book Description
This book explores the concept of degrowth, beginning from a basic assumption, not of resource depletion, as is common in most literature in the field, but rather from a state of abundance, arguing that there is a vast amount of energy on the planet waiting to be utilized by all its inhabitants. Adopting a sociological approach, Onofrio Romano argues that the growth momentum is not simply a broadly shared “value,” but the physiological outcome of a specific institutional frame. The problem is that in its mainstream formulation the degrowth alternative shares with the growth-led regime some basic anthropological, political, and institutional pillars. In order to build a real alternative, Romano suggests reviewing degrowth in the light of the dépense notion by Georges Bataille. According to Bataille, our societies have no problem with acknowledging scarcity, but with dealing with the surplus energy that calls us to act for a qualified life. So, in order to erase the growth obsession, we have to ward off the “servile” dimension, i.e., the utilitarian activities needed for the mere reproduction of life, to regain sovereignty, as reflected in the de-thinking subject. Innovative and provocative, Towards a Society of Degrowth will be of great interest to students and scholars of degrowth, sociology, social anthropology, political ecology, and ecological economics.
Author: Nicholas Georgescu-Roegen Publisher: Edward Elgar Publishing ISBN: 9781781959817 Category : Business & Economics Languages : en Pages : 450
Book Description
Economists from around the world discuss Georgescu-Roegen's (1906-94) theories in a number of areas, but especially on environmental and energy economics. They address such topics as how long neoclassical economists can continue to ignore his contribu
Author: Moïse Crochet
Author: Claudine Picq
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Flight Vehicle Integration Panel. Symposium
Author: Bruno Notarnicola
Author: 
Author: George Paine
Author: John Charles Robinson
Author: Onofrio Romano
Author: Nicholas Georgescu-Roegen
Author: