Yazar "Elbreki, A.M." seçeneğine göre listele

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    A novel passive cooling for photovoltaic module temperature reduction using truncated fins: Simulation study
    (Institute of Electrical and Electronics Engineers Inc., 2022) Elbreki, A.M.; Mohamed, F.; Almaktar, M.
    This paper aims to evaluate a novel passive thermal regulation technique for a PV module using an extended surface area called "truncated fins". Enhanced solar irradiance intensity on the top surface of the PV module was achieved using a planner reflector with an optimum angle of 60°. The ANSYS, FLUENT software was employed to perform the computational fluid dynamics (CFD) analysis to predict the PV module temperature. To actively cool the PV module, a parametric study in terms of number, thickness, and height of fins was investigated. The distance between the fins also taken into consideration. Engineering equation solver (EES) software was also used to calculate the temperature of the bare PV module i.e., without cooling system. Meanwhile, Response Surface Method is used to determine the optimum number, height, and thickness of fins. The novel passive cooling method showed that the PV system temperature significantly dropped from 64.3 °C without cooling to 44.14 °C with cooling using truncated fins, with a temperature difference of approximately 20.16 °C in comparison to the bare PV module. Additionally, the PV electrical efficiency with truncated fins improved by 9.2% under natural convection. © 2022 IEEE.
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    Optimal Placement and Sizing of Static Var Compensators in Radial Distribution Networks Using Artificial Intelligence Techniques
    (Institute of Electrical and Electronics Engineers Inc., 2023) Jafrouni, H.; Almaktar, M.; Mohamed, F.A.; Elbreki, A.M.; Rajab, Z.
    Energy conservation and efficiency are necessary actions in electrical power system. Therefore, the wasted energy that is dissipated in the transmission network needs to be minimized. The power loss can be reduced by using many techniques, including the use of reactive compensators. In this paper, intelligent algorithms are examined to find the best site and size of reactive compensators so as to improve the performance, power quality and economics of radial electrical networks. A Matlab program has been developed to find the status of a radial distribution network in terms of power flow, losses, and bus voltages. Two artificial intelligence (AI) algorithms namely genetic algorithm (GA) and particle swarm optimization (PSO) have been developed to cater for the optimal position and amount of reactive power compensation. The programmed approaches were tested in reference network of IEEE 15-bus system and then implemented on the Syrian network, specifically Al-Mayadeen distribution network comprising 64-bus. Transient Electrolyzer Program (ETAP) was used to simulate the different power systems. The study showed that the GA is superior and outperforms PSO in reducing total power loss hence the cost and also improving voltage profile. Overall, the two examined techniques can be used in any radial electrical network. © 2023 IEEE.
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    Power Quality Assessment of Karabuk University'S Grid-Connected Microgrid under High Penetration of PV Generation
    (Institute of Electrical and Electronics Engineers Inc., 2022) Almaktar, M.; Falah, A.; Hasan, Z.; Elbreki, A.M.; Mohamed, F.A.
    As the cost of photovoltaic (PV) systems has sharply fallen over the recent years, they have been enormously installed, whether in open racks, rooftop or even floating on water. Today, the integration of PV systems into the power system is mostly seen on the low voltage distribution network. This adoption is envisaged to bring both technical and environmental benefits to the traditional distribution network such as reliability, minimization of line loss, line capacity improvement, and investment deferement associated with network upgrade. However, extensive integration may also bring some detrimental impacts such as voltage rise, reverse power flow, harmonics, etc. Therefore, the limit of penetration needs to be determined so as all the desired benefits are acquired. Lately, Karabuk University has begun installing PV generators on some of its buildings, aiming ultimately for autonomus supply; yet, the effect of increasing the capacity of such systems is not yet investigated. In this paper, Electrical Transient and Analysis Program (ETAP) software is used to simulate and analyze the low voltage distribution grid of Karabuk University under multiple PV penetration levels. It is concluded that, considering different power quality metrics, the penetration level of PV as distributed generations should not exceed 75% of the maximum demand of Karabuk University. © 2022 IEEE.