High-resolution numerical simulation of the performance of vertical axis wind turbines in urban area: Part II, array of vertical axis wind turbines between buildings

Xu, Wenhao; Li, Ye; Gaohua, Lu; Li, Shoutu; Zhang, Chen; Wang, Fuxin

doi:10.1016/j.renene.2021.05.011

Cited by 33 publications

(16 citation statements)

References 42 publications

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“…In the case of the HAWT it has a fixed Aspect ratio since the rotor has a regular circular shape, on the contrary, VAWT can have a large blade length and a small radius, or vice versa, and this means that it has a different aspect ratio and is not necessarily equal to one, as is the case of the HAWT [37]. VAWT extracts wind energy that flows from every direction and is suitable for difficult working conditions and in urban areas and can also, be placed at a certain height without problems for pedestrians and vehicles [38]. VAWT is usually used for low load requirements, unlike the HAWT which is usually used for remote areas and in the offshore witch works in undisturbed wind conditions and clean [39].…”

Section: Vertical Axis Wind Turbine Vawtmentioning

confidence: 99%

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Comparison between horizontal and vertical axis wind turbine

Al-Rawajfeh

Gomaa²

2023

IJAPE

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Since ancient times, wind energy has been exploited in various fields, it was at the beginning used to rotate pumps for the purposes of agriculture and irrigation. At the beginning of the 18th century, wind turbines began to produce electricity with modest capacities. In the following years, the capacities of the turbines increased and it became necessary to deal with this increase by reducing losses and inventing new designs for turbines Suitable for working conditions and installation location. The rotor power coefficient in a wind turbine can reach 0.59 which is called the bets limit. The vertical axis wind turbine (VAWT) design was invented for working conditions, capacities, and places, in which it may be difficult to install older Horizontal axis wind turbines (HAWT). The efficiency of the HAWT is still higher than the VAWT, in addition, the amount of efficiency in the HAWT is greater than the VAWT by 25% but the VAWT has the amount of torque more than the HAWT. The main objective of this research is to compare the VAWT and the HAWT, taking into account several aspects which have been reviewed to try to understand the importance of the two designs.

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Section: Vertical Axis Wind Turbine Vawtmentioning

confidence: 99%

“…Maintenance is complicated in the HAWT due to highs above the ground, also it is need special elevators, and unlike the VAWT it is low highs above the ground as well it is easier to maintenance. [23], [38], [41] Yaw control mechanism Available for this type and raise its efficiency of wind turbine.…”

Section: Appendix Table 3 Comparison Between Hawt and Vawtmentioning

confidence: 99%

Comparison between horizontal and vertical axis wind turbine

Al-Rawajfeh

Gomaa²

2023

IJAPE

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“…From measuring the power and torque performances of the VAWT, output results provide a theoretical guiding to the development of VAWT. Xu et al (2021) conducted a numerical investigation to examine the wind turbines performances in an array by arranging them between two buildings, in urban areas. Two arrays of wind turbines uniformly arranged in a line, perpendicular to the free stream.…”

Section: Introductionmentioning

confidence: 99%

Renewable solar and wind energies on buildings for green ports in Egypt

Tawfik

Shehata

Hassan

et al. 2023

Environ Sci Pollut Res

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Energy management plan is utilized as an optimum strategy by using solar and wind energies, as a new preliminary implementation. The aim of the study is to create an optimum strategy through an optimization of an energy management system. The study implemented an onsite model, two numerical approaches, and an optimization analysis on a Mediterranean port. Two approaches have been used: solar energy is applied experimentally and numerically, and then wind energy is simulated. An optimization analysis integrated the two approaches together to control their operation. The results showed the installed solar panels provided sufficient generated power for the buildings. Also, the simulated wind arrays showed good behavior with increased power coefficient for the wind turbines, for future implementation. These results were validated using the DesignBuilder software and showed accurate values regarding the experiment for solar panels and CFD simulation. Eventually, a Pareto optimality analysis is applied between the solar and wind energies to reveal an energy management plan. Renewable energy offered energy to support the consumption of the port’s buildings.

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“…Newer concepts in wind turbines, such as greater hub height installation, can improve the utilization rate of wind farm energy and land resources (Rinne et al, 2018). Nevertheless, the problem of wind turbine wake interference caused by the array arrangement is becoming more significant (Azlan et al, 2021;Sun et al, 2021;Xu et al, 2021), as configurations of turbines must not only be space but also economic efficient. The spacing between wind turbine rotors is the most direct factor affecting the overall output power.…”

Section: Introductionmentioning

confidence: 99%

Research on complex wake interference of aligned rotors considering the precone variation of the upstream wind turbine

Zhang

Sun

et al. 2022

Front. Mar. Sci.

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To understand the interaction wake effects of aligned horizontal-axis wind turbines, a refined and low-cost wake simulation framework is developed by combining the actuator line (AL) with a local dynamic Smagorinsky (LDS) model. Firstly, the published performance of the NREL-5MW wind turbine is used to corroborate the accuracy of the AL-LDS coupling model. Secondly, the research is extended to predict the interference between two tandem rotor wakes. The influence of the precone characteristics on the overall wake and power output of the tandem wind turbines is explored by modifying the upstream wind turbine and introducing the latest third-generation Ω vortex identification method in the post-processing procedure. According to results, the tandem wind turbines have complex wake interference, with the precone angle variation always reducing the global output power, and leading to an unstable downstream turbine wake. This is detrimental to system lifespan due to high performance fluctuation and stress and as well may have ecological implications due to sediment alteration. From results, an upwind turbine with precone angle (negative) can lead to higher downstream but lower upstream turbine performance, compared with a non-tilted turbine. Despite the optimal precone angle of the upstream wind turbine is 0°, a -2.5° proves more advantageous owing to the large flexible deformation of the turbine wingtips. The findings can serve as a continuous incentive for improving wind farm numerical simulation.

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High-resolution numerical simulation of the performance of vertical axis wind turbines in urban area: Part II, array of vertical axis wind turbines between buildings

Cited by 33 publications

References 42 publications

Comparison between horizontal and vertical axis wind turbine

Comparison between horizontal and vertical axis wind turbine

Renewable solar and wind energies on buildings for green ports in Egypt

Research on complex wake interference of aligned rotors considering the precone variation of the upstream wind turbine

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