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Ibrahim H.,TechnoCenter eolien | Belmokhtar K.,TechnoCenter eolien | Ghandour M.,Lebaneese University
Energy Procedia | Year: 2015

Compressed air energy storage (CAES) is one of the most promising mature electrical energy storage technologies. CAES in combination with renewable energy generators connected to the main grid or installed at isolated loads (remote areas for example) are a viable alternative to others energy storage technologies. Indeed, because of the advantage of fast response, high economic performance and small environmental impacts, CAES has an extensive application prospect. In this paper, recent technological advances in CAES are examined. This review includes an examination of the different topologies of power systems integrating CAES and wind turbines (as power source), an overview of air and thermal storage systems, and an examination of CAES in a distributed application such as wind-diesel compressed air hybrid system used to supply the remote areas. © 2015 The Authors.


Paradis P.-L.,École de Technologie Supérieure of Montreal | Ramdenee D.,Institute Technologique Of Maintenance Industrielle | Ilinca A.,University of Quebec at Rimouski | Ibrahim H.,TechnoCenter eolien
International Journal of Simulation and Process Modelling | Year: 2014

The use of servers for computational and communication control tasks is becoming more and more frequent in industries and institutions. Ever increasing computational power and data storage combined with reduction in chipsets size resulted in the increased heat density and need for proper configurations of the server racks to enhance cooling and energy efficiency. While different methods can be used to model and design new server centres and optimise their configuration, there is no clear guideline in the literature on the best way to design them and how to increase energy efficiency of existing server centres. This paper presents a simplified yet reliable computational fluid dynamics (CFD) model used to qualitatively evaluate different cooling solutions of a data centre and proposes guidelines to improve its energy efficiency. The influence of different parameters and configurations on the cooling load of the server room is then analysed. © 2014 Inderscience Enterprises Ltd.


El-Jamal G.,Saint - Joseph University | Ibrahim H.,TechnoCenter eolien | Ghandour M.,Lebanese University
2014 International Conference on Renewable Energies for Developing Countries, REDEC 2014 | Year: 2014

Fossil energy is a major problem that disturbs the world. So replacing this kind of energy with another cheapest, harmless and that last forever become a strategic question. A big question still running the minds of the workers and investors in this sector, which type of renewable energy we should apply? At which cost? What will be the payback period and the return on investment? The aim of this paper is to highlight on the reduction of the energy profile for facilities from the Lebanese context by a case study for a residential complex. © 2014 IEEE.


Ibrahim H.,TechnoCenter eolien | Lefebvre J.,University of Québec | Methot J.F.,University of Québec | Deschenes J.S.,University of Québec
2011 IEEE Electrical Power and Energy Conference, EPEC 2011 | Year: 2011

Various aspects must be taken into account when working with wind-diesel hybrid systems for the generation of electricity especially in remote areas. Reliability and cost are two of these aspects. On the other hand, various mathematical models of the elements that make up these systems can be used, as well as various design and simulation models. This paper will review the simulation and design models of the hybrid systems that have been used up to this moment in time, indicating which tools have been developed for this purpose. © 2011 IEEE.


Ibrahim H.,TechnoCenter eolien | Ibrahim H.,University of Quebec at Rimouski | Younes R.,University of Quebec at Rimouski | Younes R.,Lebanese University | And 4 more authors.
Energy | Year: 2011

Electricity supply in remote areas around the world is mostly guaranteed by diesel generators. This relatively inefficient and expensive method is responsible for 1.2 million tons of greenhouse gas (GHG) emission in Canada annually. Some low- and high-penetration wind-diesel hybrid systems (WDS) have been experimented in order to reduce the diesel consumption. We explore the re-engineering of current diesel power plants with the introduction of high-penetration wind systems together with compressed air energy storage (CAES). This is a viable alternative to major the overall percentage of renewable energy and reduce the cost of electricity. In this paper, we present the operative principle of this hybrid system, its economic benefits and advantages and we finally propose a numerical model of each of its components. Moreover, we are demonstrating the energy efficiency of the system, particularly in terms of the increase of the engine performance and the reduction of its fuel consumption illustrated and supported by a village in northern Quebec. © 2011 Elsevier Ltd.


Martini F.,University of Quebec at Rimouski | Ramdenee D.,University of Quebec at Rimouski | Ibrahim H.,TechnoCenter eolien | Ilinca A.,University of Quebec at Rimouski
2011 IEEE Electrical Power and Energy Conference, EPEC 2011 | Year: 2011

Several research activities have been realized to improve the design of turbines and their resistance to extreme conditions like ice accretion. This phenomenon triggers the degradation of turbine performance and increases vibration problems. In an aim to mitigate this problem, it is important to predict the shape, type and extent of ice accretion in order to apply optimised de-icing strategies. This article proposes one such upstream study inscribed in a more global study being conducted at the Wind Energy Research Laboratory on ice accretion - CFX based modelling of water droplets flow in an airstream until impingement on a cylinder. This model makes part and parcel of a more elaborate project whereby thermodynamics and phase change equations will be applied on each water droplet to simulate the new geometry due to ice accretion. This article emphasis on the intrinsic parameters in multiphase modelling, the factors affecting local and global water droplets collection, models simplifications, the analytical equations used in the model, the obtained results and the options for further improvement of the model. © 2011 IEEE.


Ibrahim H.,TechnoCenter eolien | Lefebvre J.,University of Quebec at Rimouski | Methot J.F.,University of Quebec at Rimouski | Deschenes J.S.,University of Quebec at Rimouski
2011 IEEE Electrical Power and Energy Conference, EPEC 2011 | Year: 2011

In remote areas and small islands, diesel generators are often the main source of electric power. A hybrid system of wind power and genset can benefit islands or other isolated communities and increase fuel savings. In order to understand the effect of wind power regarding to reducing the rate of power supplied by the diesel generator especially when the wind turbine and genset operate simultaneously, we studied a no-storage wind-diesel system by using a power flow model tested on different operation modes of the hybrid system. © 2011 IEEE.


Belmokhtar K.,TechnoCenter eolien | Ibrahim H.,TechnoCenter eolien | Merabet A.,Saint Mary's University, Halifax
Canadian Conference on Electrical and Computer Engineering | Year: 2015

This paper describes a fault detection system strategy, which is suitable for wind generators, and may contribute to prevent failures occurring in wind energy conversion systems such as short-circuit. Indeed, the reliability of wind turbines is important in order to capture the maximum power. The proposed strategy is based on the recursive least square method for on-line identification of the generator parameters. Moreover, this approach helps to improve the model-based controller performance. The effectiveness of the proposed strategy is established through Matlab/Simulink environment. © 2015 IEEE.


Belmokhtar K.,TechnoCenter eolien | Ibrahim H.,TechnoCenter eolien
2015 IEEE Electrical Power and Energy Conference: Smarter Resilient Power Systems, EPEC 2015 | Year: 2015

This paper deals with the issue of the reactive power compensation in microgrid (MG) based on Wind Turbine Generator driving a Doubly-Fed Induction Generator (DFIG). Wind generators such as the majority of Distributed Generation (DG) systems are sensitive to the disturbances of the frequency and/or voltage. Subsequently, these systems must to be disconnected in case of voltage dip, typically where the voltage is less than 80% of rated value. DG which contributes to reduce energy loss during transmission can increase the capability of the voltage control in the power system by generating the reactive power support. In the case of the off-grid applications, sources of production may participate to the voltage control by providing or absorbing reactive power. In this work, a new strategy for determining the reference of reactive power in order to contribute to the correction of the grid voltage deviation during low or high voltage ride through is proposed. Then, the performances of both active and reactive power control of the DFIG under grid faults are analyzed through Matlab/Simulink software. © 2015 IEEE.


Ibrahim H.,TechnoCenter eolien | Ghandour M.,Lebanese University | Dimitrova M.,TechnoCenter eolien | Ilinca A.,University of Quebec at Rimouski | Perron J.,University of Quebec at Chicoutimi
Energy Procedia | Year: 2011

Wind energy is the current "star" in the field of renewable energy for electrical production. Still, the power generated by wind turbines over time is characteristically uneven due to the unpredictable nature of their primary source of power. This only increases the problems inherent to the integration of a great number of wind turbines into power networks, making their contribution rather difficult to manage (regulating voltage and frequency, wind-farm operation, etc.) The integration of wind power in the power system is now an issue in order to optimize the utilization of the resource and in order to continue the high rate of installation of wind generating capacity, which is necessary in order to achieve the goals of sustainability and security of supply. This paper presents the main technical challenges that are associated with the integration of wind power into power systems. These challenges include effects of wind power on the power system, the power system operating cost, power quality and power imbalances (stability of grid). In addition, the paper presents the solutions will be offered to improve the management of wind power generation and increase its penetration in the overall electrical energy production. © 2011 Published by Elsevier Ltd.

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