Results 31 to 40 of about 9,873,253 (312)
, 2020 © 2020 The Japan Society of Mechanical Engineers [DOI: 10.1299/jfst.2020jfst0009] Paper No.19-00557 Abstract The output power coefficient of the Savonius rotor needs to be improved in attaining better practical applications.
Takanori Matsui, T. Fukui, K. Morinishi
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Design of Power Location Coefficient System for 6G Downlink Cooperative NOMA Network
Energies, 2022 Cooperative non-orthogonal multiple access (NOMA) is a technology that addresses many challenges in future wireless generation networks by delivering a large amount of connectivity and huge system capacity.
Mohamed Hassan +5 more
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Effect of Trailing Edge Flaps on Power Coefficient of a Horizontal Axis Wind Turbine Model [PDF]
Port Said Engineering Research Journal, 2023 The field of wind energy has made significant progress, yet there is always room for improving the efficiency and the energy extracted from horizontal axis wind turbines HAWTs . There is interest in new renewable energy, including wind energy. This study
Mahmoud Khalil +3 more
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Representation and estimation of the power coefficient in wind energy conversion systems
Revista Facultad de Ingeniería, 2019 This paper aims at summarizing various methods used for representing and estimating the power coefficient in wind turbines, such as exponential, sinusoidal and polynomial models, as well as mathematical tools known as state observers.
J. González-Hernández +1 more
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Numerical Study of Vertical Axis Wind Turbine with Spoiler Based on Orthogonal Experiments [PDF]
Journal of Applied Fluid MechanicsThis paper investigated using spoilers to improve the aerodynamic characteristics of vertical-axis wind turbines. Taking the NACA0012 airfoil as the research object, the orthogonal experimental method design was employed to combine the parameters of the ...
Z. Hao, K. Chen, T. Su, Z. Zhao, Q. Wang
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Note on Power Series with Integral Coefficients [PDF]
Journal of the London Mathematical Society, 1950 25. " The electron theory of the Hall effect and allied phenomena (II)," PM (6), 32 (1916), 200. 26.. " On the mechanical relations of the energy of magnetisation," PRS 93 (1916), 20. 27. " On the mechanical relations of dielectric and magnetic polarization,' PM (6), 32 (1916), 162. 28.
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Numerical study of improving Savonius turbine power coefficient by various blade shapes
Alexandria Engineering Journal, 2019 Many Modifications have been studied for classical Savonius wind turbines in the blade shape to improve the power efficiency. Four rotor blade modifications have been studied in the present study: classical, elliptical, using Fluent Adjoint solver and a ...
Hassan A. Saeed, A. Elmekawy, S. Kassab
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Power coefficient measurements of a novel vertical axis wind turbine
Energy Science & Engineering, 2019 Wind tunnel experiments were performed to evaluate the power coefficients of three vertical axis wind turbines (VAWTs), namely, (a) conventional VAWT (two‐bladed troposkien shape), (b) novel 50% shifted troposkien shape‐vertical axis wind turbine (50 ...
Doma Hilewit +4 more
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Maximum thermodynamic power coefficient of a wind turbine
Wind Energy, 2019 According to the centenary Betz-Joukowsky law, the power extracted from a wind turbine in open flow cannot exceed 16/27 of the wind transported kinetic energy rate.
J. M. Tavares, P. Patrício
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The Coefficients of a Fibonacci Power Series
The Fibonacci Quarterly, 2004 We give a short proof of the result that all the coefficients of the series (1-x)(1-x^2)(1-x^3)(1-x^5)(1-x^8)(1-x^13)(1-x^21)... are equal to -1, 0, or 1, and most of them are equal to 0.
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