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PhD candidate in Energy Dept. University of Oviedo, Spain. He received his B.Sc from Port Said university (Mechanical Power Engineering) in 2012 and his M.Sc dual degree from the University of Oviedo and Port Said University in 2017. His research interests are in Renewable and sustainable energies, Fluid dynamics, design and experimental testing of wind and tidal turbines, CFD simulations (Fluent & OpeFoam).
Smart cities have a significant impact on the future of renewable energies as terms such as sustainability and energy saving steadily become more common. In this regard, both wind and hydrokinetic compact-size turbines can play important roles in urban communities by providing energy to nearby consumption points in an environmentally suitable manner. To evaluate the operation of a Darrieus turbine rotor as a wind or hydro microgenerator, a series of wind tunnel and water current flume tests were performed. Power and characteristic curves were obtained for all test conditions. In the wind tests, all curves seemed to be identical, which means that the turbine rotor works properly under open-field conditions. Two blockage correction equations were applied to the water channel tests that were performed under blockage values ranging from 0.2 to 0.35 to estimate the operational behavior in open water. Finally, it has been demonstrated that, with the condition of maintaining the Reynolds number between experiments in the wind tunnel and water flume, the turbine wind characteristics represents the its operation in open-water conditions.
Ahmed Gharib-Yosry; Eduardo Blanco-Marigorta; Aitor Fernández-Jiménez; Rodolfo Espina-Valdés; Eduardo Álvarez-Álvarez. Wind–Water Experimental Analysis of Small SC-Darrieus Turbine: An Approach for Energy Production in Urban Systems. Sustainability 2021, 13, 5256 .
AMA StyleAhmed Gharib-Yosry, Eduardo Blanco-Marigorta, Aitor Fernández-Jiménez, Rodolfo Espina-Valdés, Eduardo Álvarez-Álvarez. Wind–Water Experimental Analysis of Small SC-Darrieus Turbine: An Approach for Energy Production in Urban Systems. Sustainability. 2021; 13 (9):5256.
Chicago/Turabian StyleAhmed Gharib-Yosry; Eduardo Blanco-Marigorta; Aitor Fernández-Jiménez; Rodolfo Espina-Valdés; Eduardo Álvarez-Álvarez. 2021. "Wind–Water Experimental Analysis of Small SC-Darrieus Turbine: An Approach for Energy Production in Urban Systems." Sustainability 13, no. 9: 5256.
Small tidal turbines are considered economical and reliable for distributed electricity generation. Low initial cost and ease of installation make them cover all sides of the economic viability triangle in the energy market. However, operating these turbines under realistic tidal velocities remains a great challenge. The work presented herein involves the design and assessment of a micro vertical axis hydrokinetic turbine, operating at low water velocities. The blade profile, solidity and aspect ratio of the turbine model have been selected looking for a self-starting and efficient operation. Thanks to the continuous development in the additive manufacturing technology, the model can be precisely fabricated at a fraction of the cost offered by traditional machining technologies. Experiments have been performed at three flow rates with a range of inlet velocities from 0.3 to 0.7 m/s. Power curves have been obtained for each operating condition, from zero load up to the point of maximum power. Additionally, the non-dimensional tip speed ratio and power coefficient have been used to compare the performance of the different parameters. It has been found that the upstream velocity has the most obvious effect on the turbine performance, and that the peak power coefficient is linked to the intensification in the blockage ratio. Furthermore, the actuator disc theory adjusted for open channel flow has been compared and found in consonance with the experimental results. This theory has also been employed to define the turbine efficiency which, from 0.45 m/s upwards, is over 70%, and as high as 81%. Finally, the performance in an inclined channel has been analysed, finding the correlations of the maximum power points and their corresponding tip speed ratios as a function of the slope.
Ahmed Gharib Yosry; Aitor Fernández-Jiménez; Eduardo Álvarez-Álvarez; Eduardo Blanco Marigorta. Design and characterization of a vertical-axis micro tidal turbine for low velocity scenarios. Energy Conversion and Management 2021, 237, 114144 .
AMA StyleAhmed Gharib Yosry, Aitor Fernández-Jiménez, Eduardo Álvarez-Álvarez, Eduardo Blanco Marigorta. Design and characterization of a vertical-axis micro tidal turbine for low velocity scenarios. Energy Conversion and Management. 2021; 237 ():114144.
Chicago/Turabian StyleAhmed Gharib Yosry; Aitor Fernández-Jiménez; Eduardo Álvarez-Álvarez; Eduardo Blanco Marigorta. 2021. "Design and characterization of a vertical-axis micro tidal turbine for low velocity scenarios." Energy Conversion and Management 237, no. : 114144.
Ahmed Gharib Yosry. STUDY OF BIOMASS COMBUSTION USING CYCLONE COMBUSTOR. 2017, 1 .
AMA StyleAhmed Gharib Yosry. STUDY OF BIOMASS COMBUSTION USING CYCLONE COMBUSTOR. . 2017; ():1.
Chicago/Turabian StyleAhmed Gharib Yosry. 2017. "STUDY OF BIOMASS COMBUSTION USING CYCLONE COMBUSTOR." , no. : 1.