Roof mounting site analysis for micro-wind turbines

Ledo, Laia; Kosasih, P.B.; Cooper, Paul

doi:10.1016/j.renene.2010.10.030

Cited by 151 publications

(99 citation statements)

References 14 publications

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“…Ledo et al [2] conducted CFD simulations on three different roof profile shapes for understanding the wind velocity flow and turbulence intensity. The experiment was conducted for a set of urban houses of similar roof profile shapes that included a flat, pitched and pyramid roof.…”

Section: Previous Related Workmentioning

confidence: 99%

Numerical investigation of the optimum wind turbine sitting for domestic flat roofs

Ishfaq

Chaudhry

2018

Sust. Build.

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Abstract. The power capacity of roof mounted wind turbines is dependent on several factors which influence its energy yield. In this paper, an investigation has been carried out using Computational Fluid Dynamics (CFD) to determine flow distribution and establish an optimum mounting location for a small wind turbine on a domestic flat roof. The realisable k-e and SST k-v turbulence models were compared to establish their consistency with one another with respect to the physical domain. Nine mounting locations were considered for a pole mounted wind turbine. Three windward positions on the upwind side of the flat surfaced building were considered as viable locations for mounting the small wind turbine. Out of the three windward locations, the central upwind (1,0) mounting position was seen to be producing the highest velocity of 5.3 m/s from the available ambient velocity which was 4 m/s. Therefore, this mounting location provided the highest extractable power for the wind turbine. Conclusively, wind properties along with the mounting locations can play a significant role in either enhancing or diminishing the small wind turbine's performance on a domestic flat roof.

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Section: Previous Related Workmentioning

confidence: 99%

Numerical investigation of the optimum wind turbine sitting for domestic flat roofs

Ishfaq

Chaudhry

2018

Sust. Build.

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“…A building integrated wind turbine has the potential to reduce harmful carbon gas emissions from buildings, and it is suitable for on-site energy generation for urban environments. Despite their great potential, building integrated wind turbines have limited number of installations due to low wind speed, high level of turbulence and aerodynamic noise [26]. Dayan [27] suggested the mounting of wind turbines on top of high-rise buildings for a greater opportunity for wind energy generation in an urban area, and on buildings with special roof shapes [28].…”

Section: Building Integrated Wind Turbinesmentioning

confidence: 99%

“…Dutton et al [30] suggested that the locations of the acceleration effects over different roof shapes should be investigated in order to take advantage of the increased wind speed which translates into more energy yield. Ledo et al [26] studied the flow around pitched, pyramidal and flat roofs under three wind directions (0 • , 45 • , and 90 • ) for the purpose of mounting wind turbines. Gerald et al [31] conducted a study on a Sistan type wind mill energy converter for building integration.…”

Section: Building Integrated Wind Turbinesmentioning

confidence: 99%

“…The CFD gives an insight into the flow patterns that are difficult, and expensive to study using experimental methods. The choice of the method used is generally made based on the details of the flow to be obtained and the computing resources available [26]. The building model for the CFD calculation has a height of 1.36 m and a width of 0.74 m. The simulated streamlines are depicted in Figure 8.…”

Section: Computational Fluid Dynamic (Cfd)mentioning

confidence: 99%

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Design and Testing of a Novel Building Integrated Cross Axis Wind Turbine

et al. 2017

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Abstract:The prospect of harnessing wind energy in urban areas is not promising owing to low wind speeds and the turbulence caused by surrounding obstacles. However, these challenges can be overcome through an improved design of wind turbine that can operate efficiently in an urban environment. This paper presents a novel design of a building integrated cross axis wind turbine (CAWT) that can operate under dual wind direction, i.e., horizontal wind and vertical wind from the bottom of the turbine. The CAWT consists of six horizontal blades and three vertical blades for enhancing its self-starting behavior and overall performance. The study employed a mock-up building model with gable rooftop where both of the developed CAWT and the conventional straight-bladed vertical axis wind turbine (VAWT) are mounted and tested on the rooftop. The height of the CAWT and the VAWT above the rooftop was varied from 100 to 250 mm under the same experimental conditions. The results obtained from the experimental study showed that there is significant improvement in the coefficient of power (C p ) and self-starting behavior of the building integrated CAWT compared to the straight-bladed VAWT. At 100 mm height, the C p,max value of the CAWT increased by 266%, i.e., from 0.0345 to 0.1263, at tip speed ratio (TSR) (λ) of 1.1 and at wind speed of 4.5 m/s. Similar improvements in performance are also observed for all condition of CAWT heights above the rooftop where the CAWT outperformed the straight-bladed VAWT by 196%, 136% and 71% at TSR of 1.16, 1.08, and 1.12 for Y = 150, 200, and 250 mm, respectively. Moreover, the CAWT performs better at 10 • pitch angle of the horizontal blade compared to other pitch angles.

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“…In determining mounted places of wind turbines used in urban areas, turbulence should be minimized by taking into account the surrounding structures. Despite these challenges, there remains a growing interest for roof mounted wind turbines [8,9,10].…”

Section: Introductionmentioning

confidence: 99%