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Boumerdas, Algeria

Cheikh K.,Laboratoire dEnergetique | Cheikh K.,Ecole des Mines de Nantes | Sary A.,Ecole des Mines de Nantes | Khaled L.,Ecole des Mines de Nantes | And 2 more authors.
Applied Energy | Year: 2016

Attempts to use many types of biofuel have been tried throughout the past. Waste cooking oils (WCO) represent attractive alternatives to edible fat and oils for the production of biodiesel fuel from different points of view: they are inexpensive feedstock for biodiesel production. At the same time, using this kind of feedstock eliminates food versus fuel competition. Finally, Their use supposes an environmentally friendly approach.Internal combustion engines operate correctly on a wide range of speeds and loads. However, only few studies on biodiesel fueled engines are undertaken for performance mapping. In the present study, the effects of entire operational range of speed/load on engine performance and emission levels of an engine are investigated when neat WCO biodiesel (B100) and its blends (B25) and (B50) are used. The obtained results are compared to those of conventional diesel (B0).The suitability of WCO biodiesel has been established by many researchers. However their results report a wide disparity on emission levels. Combustion characteristics, performance and emission maps will be performed to give appropriate indications explaining the divergence reported in literature. The map indicates that B50 and B25 exhibit similar trends of BSFC to diesel fuel, across the speed variation albeit with difference in response levels. Contrariwise B100 shows an inverse behavior with speed increase. Results show also that Unburned Hydro-Carbons (UHC) emissions are highly correlated with engine speed. However, CO and PM emissions are extremely correlated with load and they are less sensitive to engine speed. NOx emissions are generally higher with biodiesel except some extreme zones of the map. © 2015 Elsevier Ltd. Source

Babbah S.,Laboratoire dEnergetique | Maestre I.R.,University of Cadiz | Draoui A.,Laboratoire dEnergetique | Cubillas P.,University of Cadiz | Gallero F.J.G.,University of Cadiz
International Journal of Energy, Environment and Economics | Year: 2012

The majority of the buildings existing in the North of Morocco have a badly construction adapted to the climate of the area. This has, as a result, a strong energy consumption both in winter and in summer which is not desirable economically, and it also has a negative impact on the environment. The aim, within the framework of this work, is to obtain a thermal comfort level with an energy consumption reduced by analyzing the influences of constructive quality and the orientation of the building for its energy needs. For that, we carried out a description and analyzed various types of buildings of the area in the North of Morocco. This enabled us to release certain types of residences representative from the point of view of the construction materials used and typology. © 2011 Nova Science Publishers, Inc. Source

Lounici M.S.,Ecole des Mines de Nantes | Lounici M.S.,Laboratoire dEnergetique | Tarabet L.,Laboratoire des systemes thermiques | Loubar K.,Ecole des Mines de Nantes | And 2 more authors.
6th International Conference on Thermal Engineering Theory and Applications | Year: 2012

Natural gas is one of the most attractive available fuels. A promising technique for its use in internal combustion engines is the dual fuel concept. The potential benefits of using natural gas in diesel engines are both economical and environmental. However, to be more attractive, some aspects have to be improved for best performances and less emissions. Towards improvement of natural gas dual fuel operation, the present contribution aims first to examine the problems of a dual fuel engine using natural gas as primary fuel and a pilot amount of Diesel fuel as an ignition source. Our experimental results will be used to better understand such an operation mode (dual fuel) and related problems, so that to draw conclusions which can contribute to an improvement of such an operation in order to fully benefit from the natural gas advantages. Two techniques for improvement of dual fuel engines have been examined. First, the pilot quantity is investigated. The effect of the gaseous fuel supply system is then studied. Source

Dansoko M.,Laboratoire dEnergetique | Nkwawo H.,University of Paris 13 | Diourte B.,Laboratoire dEnergetique | Floret F.,University of Paris 13 | And 2 more authors.
IFAC Proceedings Volumes (IFAC-PapersOnline) | Year: 2013

This article presents the decentralized sliding mode control design for two marine turbines connected to Grid. MPPT strategy control (Maximum Power Point Tracking) is used to maximize the energy production. Simulations in Matlab environment are made over one tide period of semidiurnal type and under some perturbations using data of Raz de Sein (Britany, France). In the first part of the simulation, the obtained results show that the energy production system can be directly connected to grid. In the second part of simulations, a comparative result using the proposed method and conventional AVR-PSS is discussed. © IFAC. Source

Dansoko M.,Laboratoire dEnergetique | Nkwawo H.,University of Paris 13 | Diourte B.,Laboratoire dEnergetique | Floret F.,University of Paris 13 | And 2 more authors.
International Journal of Electrical Power and Energy Systems | Year: 2014

This article proposes a new decentralized sliding mode control design for two synchronous generators driven by marine turbines. Decentralized Sliding Mode Multimachine Control (DSMMC) is applied to a third-order model of the wound rotor synchronous generator in multimachine configuration. Our goal consists in regulating frequency and voltage of synchronous generators in order to ensure their direct interconnection. In addition, the control strategy named Maximum Power Point Tracking (MPPT) is used to maximize the energy production. Simulations in Matlab environment are realized for a semidiurnal type tide (tide of period 12 h 25 min) using data of Raz de Sein (Britany, France). Simulations results are presented in order to highlight robustness properties under mechanical and electrical perturbations. Finally, our control method is compared to Decentralized NonLinear Control (DNLC) and conventional AVR-PSS. © 2014 Elsevier B.V. All rights reserved. Source

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