Location of aerodynamic noise sources from a 200 kW vertical-axis wind turbine

Ottermo, Fredric; Möllerström, Erik; Nordborg, Anders; Hylander, Jonny; Bernhoff, Hans

doi:10.1016/j.jsv.2017.03.033

Cited by 22 publications

(15 citation statements)

References 28 publications

(41 reference statements)

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“…The difference is especially large for the more complex-terrain central highland sites where GWA results, Besides using the results from this study to map suitable areas for wind power, it can also be used to assess wind turbine noise if wind turbines were to be erected at the studied sites, for example, with the methods proposed in [23,24]. Noise is one of the most impactful environmental aspects limiting the growth of wind power, but it can be handled through proper wind farm layout [25,26], or possibly by using the more quiet vertical axis wind turbine technology in the future [27,28].…”

Section: Discussionmentioning

confidence: 99%

An Assessment of Wind Energy Potential for the Three Topographic Regions of Eritrea

2020

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This paper presents the wind energy potential and wind characteristics for 25 wind sites in Eritrea, based on wind data from the years 2000–2005. The studied sites are distributed all over Eritrea, but can roughly be divided into three regions: coastal region, western lowlands, and central highlands. The coastal region sites have the highest potential for wind power. An uncertainty, due to extrapolating the wind speed from the 10-m measurements, should be noted. The year to year variations are typically small and, for the sites deemed as suitable for wind power, the seasonal variations are most prominent in the coastal region with a peak during the period November–March. Moreover, Weibull parameters, prevailing wind direction, and wind power density recalculated for 100 m above ground are presented for all 25 sites. Comparing the results to values from the web-based, large-scale dataset, the Global Wind Atlas (GWA), both mean wind speed and wind power density are typically higher for the measurements. The difference is especially large for the more complex-terrain central highland sites where GWA results are also likely to be more uncertain. The result of this study can be used to make preliminary assessments on possible power production potential at the given sites.

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Section: Discussionmentioning

confidence: 99%

An Assessment of Wind Energy Potential for the Three Topographic Regions of Eritrea

2020

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“…Noise emission at 8 m/s at 10 m above the ground surface is 96.2 dBA, whereas the noise level for 6 m/s is 94.1 dBA. It was also found that trailing edge vortex and the turbulence is the key source of noise in the H-rotor [60]. The noise propagation study shows that noise from VAWT decreases rapidly compared to a similar size HAWT [61].…”

Section: Aerogeneratormentioning

confidence: 93%

Review on the Evolution of Darrieus Vertical Axis Wind Turbine: Large Wind Turbines

et al. 2019

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The objective of the current review is to present the development of a large vertical axis wind turbine (VAWT) since its naissance to its current applications. The turbines are critically reviewed in terms of performance, blade configuration, tower design, and mode of failure. The early VAWTs mostly failed due to metal fatigue since the composites were not developed. Revisiting those configurations could yield insight into the future development of VAWT. The challenges faced by horizontal axis wind turbine (HAWT), especially in the megawatt capacity, renewed interest in large scale VAWT. VAWT provides a solution for some of the immediate challenges faced by HAWT in the offshore environment in terms of reliability, maintenance, and cost. The current rate of research and development on VAWT could lead to potential and economical alternatives for HAWT. The current summary on VAWT is envisioned to be an information hub about the growth of the Darrieus turbine from the kW capacity to megawatt scale. turbine to avert the wind load [2] has opened up new areas of application. Innovative turbines are continuing to emerge to address the shortcomings of the original Darrieus design [3,4]. Tailored airfoils are developed for the Darrieus rotor to enhance self-starting capability [5][6][7][8]. Various mathematical models [3,7] are developed to assess the rotor performance. Computational simulation is extensively used to optimise the Darrieus turbine and serves as an alternative for costly prototyping [9]. The evolution of small VAWTs with the capacity of less than 50 kW are reviewed by the author in previous work [10]. This review has been categorised based on the timeline of development. The turbines are examined on their configuration, type of support, specifications, the reason for failure, and current status. The current study is a knowledge hub on past projects that yields valuable information on the failure to develop efficient and cost-effective VAWTs. Though the paper aims to cover most of the turbines that were developed in the past and current ongoing projects, there may be missing projects of which the author is unaware.

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“…As there were problems with the attachment of the wooden tower to the foundation, guy cables were added after two years [50]. After operating at limited wind speeds for nearly a full year from 2011 to 2012, the turbine was used sporadically for experimentation for several years [51][52][53]. After a minor overhaul in 2018, it once again commenced automatic operation.…”

Section: Vertical Windmentioning

confidence: 99%

Wind Turbines from the Swedish Wind Energy Program and the Subsequent Commercialization Attempts—A Historical Review

Möllerström

2019

Energies

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This paper summarizes wind turbines of Swedish origin, 50 kW and above. Both the large governmental-funded prototypes from the early 1980s and following attempts to build commercial turbines are covered. After the 1973 oil crisis, a development program for wind turbine technology was initiated in Sweden, culminating in the early 1980s with the 2 and 3-MW machines at Maglarp and Näsudden. However, government interest declined, and Sweden soon lost its position as one of the leading countries regarding wind turbine development. Nevertheless, several attempts to build commercial wind turbines in Sweden were made in the following decades. Most attempts have, like the earlier prototypes, used a two-bladed rotor, which has become synonymous with the Swedish wind turbine development line. The current ongoing Swedish endeavors primarily focus on the niche-concept of vertical axis wind turbines (VAWTs), which is a demonstration of how far from the broad commercial market of Sweden has moved. Thus far, none of the Swedish attempts have been commercially successful, and unlike countries like Denmark or Germany, Sweden currently has no large wind turbine producer. Suggested reasons include early government interventions focusing on two-bladed prototypes and political disinterest, with wind power grants cut in half by 1985, and the domestic industry not being favored in government policies for deploying wind power.

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Location of aerodynamic noise sources from a 200 kW vertical-axis wind turbine

Cited by 22 publications

References 28 publications

An Assessment of Wind Energy Potential for the Three Topographic Regions of Eritrea

An Assessment of Wind Energy Potential for the Three Topographic Regions of Eritrea

Review on the Evolution of Darrieus Vertical Axis Wind Turbine: Large Wind Turbines

Wind Turbines from the Swedish Wind Energy Program and the Subsequent Commercialization Attempts—A Historical Review

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