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Full-Text Articles in Engineering

Algorithme D’Elaboration D’Un Reseau Electrique A Gestion Optimale D’Ecoulement Des Puissances, Tarek Mesbah Dec 2007

Algorithme D’Elaboration D’Un Reseau Electrique A Gestion Optimale D’Ecoulement Des Puissances, Tarek Mesbah

Boukhemis Chetate

Un des baromètres (indicateurs du niveau d’évolution ) de développement d’un pays, est sa consommation en énergie électrique ; dont tout industrie et mode de vie des résidents en dépend. Partant sur ce point capital nous avons organisé la thèse afin de gérer le parc énergétique national d’une manière rationnelle. Cette étude peut servir dans la compréhension et l’analyse approfondie de l’état de la stabilité de notre réseau électrique, qui a montré sa fragilité après l’incident vécu le 03/02/2003, qui a prouvé l’urgence de prendre en charge toutes les insuffisances enregistrées pour éviter que cet incident se reproduise. La thèse …


Experimental Study Of Coal Pyrolysis And Gasification In Association With Syngas Combustion, Wei-Hsin Chen Nov 2007

Experimental Study Of Coal Pyrolysis And Gasification In Association With Syngas Combustion, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.


Evaluation Of Ionic Liquid Based Green Separation Agents For Carbon Combustion Flue Gas Stream Purification, Samuel Morton Oct 2007

Evaluation Of Ionic Liquid Based Green Separation Agents For Carbon Combustion Flue Gas Stream Purification, Samuel Morton

Samuel A Morton

No abstract provided.


Influence Of Overvoltages In Induction Motors Fed By Pwm Voltage Inverters On Power Efficiency, Boukhemis Chetate, Mohammed Tahar Belassel, Rachid Beguenane, Stéphane Simard Oct 2007

Influence Of Overvoltages In Induction Motors Fed By Pwm Voltage Inverters On Power Efficiency, Boukhemis Chetate, Mohammed Tahar Belassel, Rachid Beguenane, Stéphane Simard

Boukhemis Chetate

No abstract provided.


Characterization Of Water Gas Shift Reaction In Association With Carbon Dioxide Sequestration, Wei-Hsin Chen Sep 2007

Characterization Of Water Gas Shift Reaction In Association With Carbon Dioxide Sequestration, Wei-Hsin Chen

Wei-Hsin Chen

The characteristics of a water gas shift reaction (WGSR) in association with carbon dioxide sequestration under the effects of a high-temperature catalyst (HTC) and a low-temperature catalyst (LTC) are studied experimentally. With the condition of fixed residence time (0.1 s) for the reactants in the catalyst bed, it is found that the reaction behaviors with the HTC are inherently different from those with the LTC. Specifically, for the WGSR with the HTC, the reaction can be divided into a rapid growth regime, a progressive growth regime and a slow growth regime with increasing reaction temperature or steam/CO ratio. With regard …


Estudio De La Eficiencia De Reactores Fotocatalíticos Heterogéneos, Jesus Moreira Del Rio Aug 2007

Estudio De La Eficiencia De Reactores Fotocatalíticos Heterogéneos, Jesus Moreira Del Rio

Jesus Moreira del Rio

No abstract provided.


Preliminary Model Tests For The Design Of A Gliding Deep Water Elevator, Christopher Roman, T. Gregory, E. Martin, A. Sanguinetti, J. Drummond Aug 2007

Preliminary Model Tests For The Design Of A Gliding Deep Water Elevator, Christopher Roman, T. Gregory, E. Martin, A. Sanguinetti, J. Drummond

Christopher N. Roman

This paper presents progress on the design of a "smart elevator" to be used in conjunction with deep sea ROV operations. Deep sea elevators are gravity driven untethered platforms used to deliver and or return items from the sea floor. Elevators are used when items are too large or heavy to be handled by the ROV, or when the turn around time to recover and redeploy the ROV system for sample removal is prohibitive. Unfortunately, efficiency is complicated by the precision with which elevators can be landed at a specific location on the bottom and recovered on the surface because …


Evaluation Study Of Building-Resolved Urban Dispersion Models, J. E. Flaherty, K. J. Allwine, M. J. Brown, W. J. Coirier, S. C. Ericson, O. R. Hansen, A. H. Huber, S. Kim, M. J. Leach, J. D. Mirocha, R. K. Newsom, G. Patnaik, I. Senocak Aug 2007

Evaluation Study Of Building-Resolved Urban Dispersion Models, J. E. Flaherty, K. J. Allwine, M. J. Brown, W. J. Coirier, S. C. Ericson, O. R. Hansen, A. H. Huber, S. Kim, M. J. Leach, J. D. Mirocha, R. K. Newsom, G. Patnaik, I. Senocak

Inanc Senocak

For effective emergency response and recovery planning, it is critically important that building-resolved urban dispersion models be evaluated using field data. Several full-physics computational fluid dynamics (CFD) models and semi-empirical building-resolved (SEB) models are being advanced and applied to simulating flow and dispersion in urban areas. To obtain an estimateof the current state-of-readiness of these classes of models, the Department of Homeland Security(DHS) funded a study to compare five CFD models and one SEB model with tracer data from the extensive Midtown Manhattan field study(MID05) conducted during August 2005 as part of the DHS Urban Dispersion Program (UDP; Allwineand Flaherty …


Volatile Release And Particle Formation Characteristics Of Injected Pulverized Coal In Blast Furnaces, Wei-Hsin Chen Jun 2007

Volatile Release And Particle Formation Characteristics Of Injected Pulverized Coal In Blast Furnaces, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.


Transient Gasification And Syngas Formation From Coal Particles In A Fixed-Bed Reactor, Wei-Hsin Chen Jun 2007

Transient Gasification And Syngas Formation From Coal Particles In A Fixed-Bed Reactor, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.


Performances Of Pulverized Coal Injection In Blowpipe And Tuyere At Various Operational Conditions, Wei-Hsin Chen Jun 2007

Performances Of Pulverized Coal Injection In Blowpipe And Tuyere At Various Operational Conditions, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.


Design Of A Gas Tight Water Sampler For Auv Operations, Christopher Roman, R. Camilli May 2007

Design Of A Gas Tight Water Sampler For Auv Operations, Christopher Roman, R. Camilli

Christopher N. Roman

This paper presents the design and preliminary test results for a small gas tight water sampler intended to work on scientific AUVs. In recent years AUVs have developed into reliable platforms capable of carrying a wide variety of environmental sensors for in-situ chemical measurements. Physical sample collection however remains difficult, due to the combination of space, power and complexity constraints inherent in working with autonomous platforms. The AUV sampler is a small (12 cm times 85 cm) cylindrical package designed to collect eight 20 ml gas tight volumes of water, with each sample maintained at high pressure to depths of …


Applying Agile Approaches To Non-Software Development: Lessons Learned From The Rup For System Z Project, Cécile Péraire Apr 2007

Applying Agile Approaches To Non-Software Development: Lessons Learned From The Rup For System Z Project, Cécile Péraire

Cécile Péraire

No abstract provided.


A Simplified Model Of Predicting Coal Reaction In A Partial Oxidation Environment, Wei-Hsin Chen Apr 2007

A Simplified Model Of Predicting Coal Reaction In A Partial Oxidation Environment, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.


New Technique Of One And Simultaneous Two Open-Switches Fault Automation Detection And Location In Two Level Three Voltage Inverter, Tarak Benslimane, Boukhemis Chetate Feb 2007

New Technique Of One And Simultaneous Two Open-Switches Fault Automation Detection And Location In Two Level Three Voltage Inverter, Tarak Benslimane, Boukhemis Chetate

Boukhemis Chetate

No abstract provided.


Plantar Flexor Muscle Force Substitution During Walking With A Unilateral Passive Dynamic Ankle-Foot Orthosis: A Simulation Study, Allison Kinney, Richard Neptune, S. Stanhope Jan 2007

Plantar Flexor Muscle Force Substitution During Walking With A Unilateral Passive Dynamic Ankle-Foot Orthosis: A Simulation Study, Allison Kinney, Richard Neptune, S. Stanhope

Allison Kinney

No abstract provided.


Extinction Of Counterflow Diffusion Flames With Radiative Heat Loss And Nonunity Lewis Numbers, Wei-Hsin Chen Jan 2007

Extinction Of Counterflow Diffusion Flames With Radiative Heat Loss And Nonunity Lewis Numbers, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.


The Case For Inductive Teaching, Michael Prince, R. Felder, R. Brent Dec 2006

The Case For Inductive Teaching, Michael Prince, R. Felder, R. Brent

Michael J. Prince

No abstract provided.


Coordinated Control Of Uavs And Reusable Launch Vehicles, Raúl Ordóñez Dec 2006

Coordinated Control Of Uavs And Reusable Launch Vehicles, Raúl Ordóñez

Raúl Ordóñez

PI, funded by AFRL/DAGSI, $536,739, year: 2004-2007.


Optimisation Des Régimes De Fonctionnement D'Un Moteur Asynchrone À Cage Entrainant Une Charge Variable, Malika Louanchi Dec 2006

Optimisation Des Régimes De Fonctionnement D'Un Moteur Asynchrone À Cage Entrainant Une Charge Variable, Malika Louanchi

Boukhemis Chetate

L’objectif de ce travail est l’optimisation du régime de fonctionnement des moteurs asynchrones lorsqu’ils sont sou chargés en minimisant le courant statorique absorbé en régime établit. La minimisation du courant statorique est obtenue en faisant varier la tension d’alimentation. Nous avons initialement procédé à la description et à la modélisation du moteur asynchrone, et à partir d’un schéma équivalent du moteur nous avons établit la relation liant le courant statorique minimal à la tension qui lui correspond. Pour la variation de la tension d’alimentation nous avons opté pour un gradateur triphasé à thyristors et pour un onduleur de tension à …