Urban wind energy conversion: The potential of ducted turbines

Grant, Andrew; Johnstone, Cameron; Kelly, Nick

doi:10.1016/j.renene.2007.08.005

Cited by 107 publications

(38 citation statements)

References 12 publications

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“…This kind of wind turbine takes the most of the pressure difference between the vertical wall and the roof, with positive and negative pressures, respectively. Depending on the differential pressure coefficient, power coefficient values close to 1 can be reached (Grant et al, 2008). Fig.…”

Section: Wind Energy Exploitation and Wind Turbine Positioningmentioning

confidence: 99%

Roof region dependent wind potential assessment with different RANS turbulence models

Toja-Silva

Peralta

López-García

et al. 2015

Journal of Wind Engineering and Industrial Aerodynamics

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The analysis of the wind flow around buildings has a great interest from the point of view of the wind energy assessment, pollutant dispersion control, natural ventilation and pedestrians wind comfort and safety. Since LES turbulence models are computationally time consuming when applied to real geometries, RANS models are still widely used. However, RANS models are very sensitive to the chosen turbulence parametrisation and the results can vary according to the application. In this investigation, the simulation of the wind flow around an isolated building is performed using various types of RANS turbulence models in the open source code OpenFOAM, and the results are compared with benchmark experimental data. In order to confirm the numerical accuracy of the simulations, a grid dependency analysis is performed and the convergence index and rate are calculated. Hit rates are calculated for all the cases and the models that successfully pass a validation criterion are analysed at different regions of the building roof, and the most accurate RANS models for the modelling of the flow at each region are identified. The characteristics of the wind flow at each region are also analysed from the point of view of the wind energy generation, and the most adequate wind turbine model for the wind energy exploitation at each region of the building roof is chosen.

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Section: Wind Energy Exploitation and Wind Turbine Positioningmentioning

confidence: 99%

Roof region dependent wind potential assessment with different RANS turbulence models

Toja-Silva

Peralta

López-García

et al. 2015

Journal of Wind Engineering and Industrial Aerodynamics

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“…The wind rose data were fitted using the Weibull distribution, which is a good fit to the measured wind speed data [57], for each wind direction [58,59]. In addition, the applied system was assumed to generate electric power from the approaching wind within an angle of 90 • .…”

Section: Cfd Analyses and Calculation Assumptions For Wind Turbinementioning

confidence: 99%

Renewable Energy Potential by the Application of a Building Integrated Photovoltaic and Wind Turbine System in Global Urban Areas

et al. 2017

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Globally, maintaining equilibrium between energy supply and demand is critical in urban areas facing increasing energy consumption and high-speed economic development. As an alternative, the large-scale application of renewable energy, such as solar and wind power, might be a long-term solution in an urban context. This study assessed the overall utilization potential of a building-integrated photovoltaic and wind turbine (BIPvWt) system, which can be applied to a building skin in global urban areas. The first step of this study was to reorganize the large volume of global annual climate data. The data were analyzed by computational fluid dynamic analysis and an energy simulation applicable to the BIPvWt system, which can generate a P max 300 Wp/module with a 15% conversion efficiency from a photovoltaic (PV) system and a 0.149 power coefficient/module from wind turbines in categorized urban contexts and office buildings in specific cities; it was constructed to evaluate and optimize the ratio that can cover the current energy consumption. A diagram of the distribution of the solar and wind energy potential and design guidelines for a building skin were developed. The perspective of balancing the increasing energy consumption using renewable energy in urban areas can be visualized positively in the near future.

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“…By applying the acceleration factor of 1.5 in average wind velocities per day [18], it will reveal that we had 240 days in 2007 which had an effective wind speed greater than the cut-in of the "FDCS-15B". Given the increase of the wind speed through the wind-arrester, as is calculated in (2), and the generation of 5760 hours a year, the installation of one smallscale wind turbine in 900 wind-arresters, which have adequate space for the selected wind turbine, across the town could generate the following output in one year as shown in (3).…”

Section: Total Power Generation Of Ardakanmentioning

confidence: 99%

Hidden wind farms potential for residential households having roof-mounted wind arrester

Amini

Kamoona

2014

2014 International Conference on Renewable Energy Research and Application (ICRERA)

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Abstract-Small-scale energy-generating systems are being increasingly integrated into built environment, and the use of renewable energies is now spreading to old towns in developing countries. Despite the promise of free energy, the high-tech appearance of the harnessing tools of renewables has provoked criticism because of the incompatibility with the cultural/environmental characteristics of older towns in Iran. This paper presents a new concept of novel hidden wind farms in the residential households of Iranian desert-edge towns with roofmounted wind-arresters. The results of this study show that a hidden wind farm integrated into old towns with the potential of tourism can eliminate the concern over the visibility and bird collisions as well as the use of land. In the present study, the old city of Ardakan, Yazd, with an arid climate located at the edge of a desert in the center of Iran, is selected as target case study. Calculations show that the application of one small-scale wind turbine per wind-arrester across the town can generate approximately 2.90 GWh a year. Moreover, the proposed concept could also be applied in other countries such as Afghanistan, Egypt, Pakistan, Iraq, UAE and some African countries.

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Urban wind energy conversion: The potential of ducted turbines

Cited by 107 publications

References 12 publications

Roof region dependent wind potential assessment with different RANS turbulence models

Roof region dependent wind potential assessment with different RANS turbulence models

Renewable Energy Potential by the Application of a Building Integrated Photovoltaic and Wind Turbine System in Global Urban Areas

Hidden wind farms potential for residential households having roof-mounted wind arrester

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