IJE_Vol 03 N 02

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    Optimal Planning of On-Grid Hybrid Microgrid for Remote Island Using HOMER Software, Kish in Iran
    (جامعة الوادي - university of el oued, 2018-10-19) Ebrahimi, Saeedeh; Jahangiri, Mehdi; Raiesi, Heidar Ali; Ariae, Afrooz Rahimi
    HOMER software functions as a tool for modeling and optimization of an energy generation micropower system based on renewable technologies. In this paper for the first time the monthly real load data have been used in HOMER to design a renewable-based microgrid in grid-connected mode for Kish Island, Iran. The calculations were performed in a way that the designed system could supply the load demand of the studied area with the lowest cost, least pollution, and highest reliability. To overcome the intermittency of renewable energy sources such as wind and solar, a combination of these sources in a hybrid system and installation of battery storage systems were considered. The solar radiation and wind speed data required by the software were obtained from the country’s meteorology and NASA website and used in the software. The analysis results of four scenarios, including national grid/diesel generator, national grid/diesel generator/solar cell, national grid/diesel generator/wind turbine, and national grid/diesel generator/solar cell/wind turbine, showed the prices per kWh of $0.483, $0.505, $0.472, $0.537, respectively. In these scenarios, the share of renewable energies was 0%, 8%, 11%, and 26%, respectively. The highest amount of electricity sold to the national grid was 1597095 kWh/y for the fourth scenario which had also the lowest rate of CO2 emissions by 4128650 kg/y.
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    Modeling and Comparative Study of Speed Sensor and Sensor-less based on TSR-MPPT Method for PMSG-WT Applications
    (جامعة الوادي - university of el oued, 2018-11-13) Saidi, Y; Mezoua, A; Miloud, Y; Benmahdjoub, M; Yahiaoui, A; Modeling, M
    This paper aims to present a study and comparison between two approaches for maximizing the power delivered by the WT-S (wind turbine system) which is called (MPPT-Control) based on TSR method (tip-speed ratio): first method is based on MPC (maximum power control) with wind speed measurement (TSR-MPCWSM) and the second one based on MPC with wind speed estimation (TSR-MPCWSE). These methods are analytically compared to illustrate TSRMPPT and power smoothing capability delivered by the aerodynamic turbine system. The dynamic performance, robustness and fast approximation of the optimal value are proved with the simulations (MATLAB/Simulink® software).
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    Effect of the Preheating Inlet Air on the G222 Fuel Combustion
    (جامعة الوادي - university of el oued, 2018-11-25) Attia, HadiMohammed El Hadi; Driss, Zied; Khechekhouche, Abderrahmane
    In this paper, a numerical simulation is developed to study the preheating effect of the air in a three-dimensional cylindrical combustion chamber using the FLUENT-CFD code. Particularly, we are interested on the calculation of the characteristic parameters such as the axial velocity, the temperature and the mass fraction of carbon monoxide. This study consists of a special treatment of mathematical models. The considered approaches resolve the governing equations of system. The main objective of this work is to study the behavior of the parameters considered previously during the variation of the air inlet temperature. The obtained results show that the variation of the inlet temperature presents a direct effect on the considered parameters
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    CFD simulation of natural convection and heat transfer in a flat solar thermal collector with fins on the glazing - horizontal case
    (جامعة الوادي - university of el oued, 2018-12-06) Laaraba, Adel
    This study is based on a CFD simulation of a flat horizontal solar thermal collector containing fins on its inner face of the glazing. The walls of the solar collector with insulation are considered adiabatic and the rest of the walls are at constant different temperatures. The principal objective of this work is to study the effects of the number of fins that changed from 0 to 30, as well as their length varied from 0 to 0.8 on the air flow and heat transfer characteristics. It has been observed that the heat transfer rate is strongly affected by the number of fins and the length of the fins. The obtained result showed that the increase of the fins reduces the heat loss by convection by 54 %.
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    Comparative Study between Sliding Mode Control and the Vectorial Control of a Brushless doubly fed induction generator
    (جامعة الوادي - university of el oued, 2018-12-17) Oussama, Moussa; Rachid, Abdessemed; Said, Benaggoune; Benguesmia, Hani
    Brushless doubly fed induction generators (BDFIG) show commercial promise for wind-power generation due to their lower capital and operational costs and higher reliability as compared with doubly fed induction generators. This paper proposes a robust sliding mode control of grid-connected brushless doubly fed induction generator (BDFIG). The developed algorithm is based on the decoupling control by using oriented grid flux vector control strategy. The decoupling of the active and the reactive stator powers insures an optimal performance of the BDFIG at the sub-synchronous region. The stator of this machine incorporates two sets of three phase windings with different number of poles, power winding (PW) and control winding (CW). The proposed method is tested with the Matlab/Simulink software. Simulation results illustrate the performances and the feasibility of the designed control
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    Numerical Study of a Turbulent Burner by Means of RANS and Detailed Chemistry
    (جامعة الوادي - university of el oued, 2018-12-27) Hafid, Mohamed; Hebbir, Nacer; Bouarour, Kamel; Trabelsi, Senda
    The present paper shows a numerical study of the Co-flow turbulent flame configuration using the Reynolds Averaged Navier-Stokes (RANS) modelling with detailed chemistry. The presumed Probability Density Function (PDF) model combined with the k-Ɛ turbulence model is adopted. The GRI Mech-3.0 mechanism that involves 53 species and 325 reactions is used. The effect of the turbulent Schmidt number Sct and the C1ε constant in the turbulent dissipation transport equation is highlighted. Despite the simplicity of RANS approach compared to other complex models such as LES and DNS, the results show that this approach is still able to simulate the turbulent flame