A better insight on physics involved in the self-starting of a straight-blade Darrieus wind turbine by means of two-dimensional Computational Fluid Dynamics

Mohamed, Omar S.; El-Baz, Ahmed; Bianchini, Alessandro

doi:10.1016/j.jweia.2021.104793

Cited by 20 publications

(3 citation statements)

References 31 publications

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“…The objective of a study conducted by [20] was to delve into the intricate physics involved during the self-starting phase of a specific system. This was achieved through a two-dimensional CFD approach.…”

Section: Literature Reviewmentioning

confidence: 99%

Design and implementation of smart integrated hybrid Solar-Darrieus wind turbine system for in-house power generation

Alnaimi,

Kazem,

Alzakri

et al. 2024

Renew. Energy Environ. Sustain.

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This paper presents the design and development of an integrated hybrid Solar-Darrieus wind turbine system for renewable power generation. The Darrieus wind turbine's performance is meticulously assessed using the SG6043 airfoil, determined through Q-blade simulation, and validated via comprehensive CFD simulations. The study identifies SG6043 as the optimal airfoil, surpassing alternatives. CFD simulations yield specific coefficients of power (0.2366) and moment (0.0288). The paper also introduces a hybrid prototype, showcasing of 10 W photovoltaic module and improved turbine performance with the SG6043 airfoil. The focus extends to an optimized hybrid PV solar-wind system seamlessly integrated with IoT technology for remote monitoring. Addressing weather challenges, the research suggests blade shape optimizations via Q-blade and an IoT-based solution leveraging the ESP32 Wi-Fi module. Theoretical results project electrical energy generation ranging from 0.88 kW on March 14, 2023, to 0.06 kW on February 20, 2023. Darrieus wind turbines, experiencing increased blade drag, require less lift to operate. Experimental and theoretical results converge well, affirming the model's reasonable assumptions. Beyond advancing renewable energy technologies, this research sets the stage for future investigations aimed at enhancing the efficiency and capabilities of hybrid wind-solar PV systems.

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Section: Literature Reviewmentioning

confidence: 99%

Design and implementation of smart integrated hybrid Solar-Darrieus wind turbine system for in-house power generation

Alnaimi,

Kazem,

Alzakri

et al. 2024

Renew. Energy Environ. Sustain.

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show abstract

“…Due to the fact that the vortex separation could be suppressed or delayed due to offsetting the pitching angle and blade number, the starting performance of the wind turbine will be improved. Mohamed et al [30] investigated the aerodynamics of Darrieus turbines during start-up using a two-dimensional CFD approach. The ANSYS-FLUENT solver was utilized to perform the fluid-structure interaction simulation.…”

Section: Introductionmentioning

confidence: 99%

A Modeling Study Focused on Improving the Aerodynamic Performance of a Small Horizontal Axis Wind Turbine

Khan

2023

Sustainability

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The excessive burning of the fossil fuels has excessively changed the global temperature in the last few decades. The global warming caused due to the burning of the fossil fuels has initiated a need of increasing the use of renewal energy sources. The wind energy is one of the renewable energy sources that can mitigate the excessive global dependency on the fossil fuels. For locations with low-to-medium wind speeds (less than 7 m/s), the main problem is with the starting of the wind turbine. To start a stationary wind turbine, not only is it necessary to overcome the inertia and static friction of the turbine, but the angle of incidence of the wind relative to blade profile also needs to be favorable. Thus, at low wind speeds, the resulting low torque is not enough to start the turbine. It is, therefore, necessary to incorporate a good starting torque in the design requirements of turbines. In this paper, a modeling study is performed using the Pro/E, ADAMS and MATLAB software to improve the starting behavior of a horizontal axis wind turbine for the Cherat location in the northern areas of Pakistan. The yearly average wind speed in the northern areas of Pakistan is less than 5 m/s. The blade element momentum (BEM) theory is used to calculate the optimized wind turbine blade parameters (blade angles and chord lengths) that correspond to the maximum starting torque. Based on the optimized wind turbine blade parameters, Pro/E models were developed and imported to ADAMS software to calculate the torque. As compared to the initial wind turbine model, for the optimized wind turbine model, the starting torque increased from 22.5 N-m to 28 N-m and the coefficient of performance (COP) increased from 0.42 to 0.49 at a tip–speed ratio of 4. The starting torque of the wind turbine should exceed the resistive torques due to bearing friction, generator static, dynamic torque and the inertia of the rotor in order to start the wind turbine. The starting behavior of the horizontal axis wind turbine was successfully improved, and the optimized wind turbine model showed an increased starting torque for low-to-medium wind speed ranges.

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“…(m) u}@ QwD `=aW R '(m=s) O=@ CaQU V '(kg=m 3 ) =wy |r=oJ u; QO xm u=wD w Qw=DWo w xOw@ |Oa@wO |R=Ux}@W QO QDt 1 u}@ QwD |=yxQB `=iDQ= H w |Q=Po}=H (W ) C=w w (N:m) QDtuDw}v ?ULQ@ ? }DQD x@ \@=wQ u}= QO |HwQN u}@ QwD Oa@|@ |v=QwO CaQU x@ |O}OW |oDU@=w u}@ QwD |HwQN u=wD "OwW|t [23] "…”

mentioning

confidence: 99%

کنترل فعال جریان روی پره ی توربین باد محوری عمودی داریوس با استفاده از عملگر پلاسما

ابراهیمی¹,

زارع²

2022

مهندسی مکانیک شریف

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A better insight on physics involved in the self-starting of a straight-blade Darrieus wind turbine by means of two-dimensional Computational Fluid Dynamics

Cited by 20 publications

References 31 publications

Design and implementation of smart integrated hybrid Solar-Darrieus wind turbine system for in-house power generation

Design and implementation of smart integrated hybrid Solar-Darrieus wind turbine system for in-house power generation

A Modeling Study Focused on Improving the Aerodynamic Performance of a Small Horizontal Axis Wind Turbine

کنترل فعال جریان روی پره ی توربین باد محوری عمودی داریوس با استفاده از عملگر پلاسما

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