Effect of roof-mounted solar panels on the wind energy exploitation on high-rise buildings

Toja-Silva, Francisco; Peralta, C.; López-García, Óscar; Navarro, Jorge; Cruz, Ignacio

doi:10.1016/j.jweia.2015.06.010

Cited by 35 publications

(19 citation statements)

References 38 publications

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“…The spherical roof shows the lowest values in k, although the lower values at z/H < 1.05 are observed for shed and pitched roofs. As is shown in Figure 11c, the effect of the different roof shapes on the wind flow is clearly appreciated at the height of the turbulence intensity limit for horizontal axis wind turbines (HAWT) of T I < 0.15 [18,40,41]. Compared with the flat roof, there is a moderate increase for pitched and shed roofs (15.2% and 26.6%, respectively), a moderate decrease for the vaulted roof (11.4%) and a significant decrease for the spherical roof (40.5%).…”

Section: State-of-the-art Roof Shapesmentioning

confidence: 92%

“…The value of k at the curved edge significantly decreases at 1.03 < z/H < 1.35, especially at the center and downstream, reaching decrease rates close to 30%. Therefore, the curved edge has a very positive effect also on k. The effect of the different edge types tested is clearly appreciated at the height of the turbulence intensity threshold for a HAWT of T I < 0.15 [18,40,41], which remains rather constant at the cantilever and the simple edge, significantly increases for the railing edge and decreases for the curved edge (see Figure 20). For the railing edge, the height of the T I threshold of T I = 0.15 increases up to 20% upstream, 16% at the central region and 10% downstream.…”

Section: Influence Of the Roof Edge Shape On The Wind Flowmentioning

confidence: 93%

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On Roof Geometry for Urban Wind Energy Exploitation in High-Rise Buildings

et al. 2015

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The European program HORIZON2020 aims to have 20% of electricity produced by renewable sources. The building sector represents 40% of the European Union energy consumption. Reducing energy consumption in buildings is therefore a priority for energy efficiency. The present investigation explores the most adequate roof shapes compatible with the placement of different types of small wind energy generators on high-rise buildings for urban wind energy exploitation. The wind flow around traditional state-of-the-art roof shapes is considered. In addition, the influence of the roof edge on the wind flow on high-rise buildings is analyzed. These geometries are investigated, both qualitatively and quantitatively, and the turbulence intensity threshold for horizontal axis wind turbines is considered. The most adequate shapes for wind energy exploitation are identified, studying vertical profiles of velocity, turbulent kinetic energy and turbulence intensity. Curved shapes are the most interesting building roof shapes from the wind energy exploitation point of view, leading to the highest speed-up and the lowest turbulence intensity.

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Section: State-of-the-art Roof Shapesmentioning

confidence: 92%

Section: Influence Of the Roof Edge Shape On The Wind Flowmentioning

confidence: 93%

On Roof Geometry for Urban Wind Energy Exploitation in High-Rise Buildings

et al. 2015

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“…Although many studies [72][73][74][75] have shown that Large Eddy Simulation (LES) presents better agreement with experiments than RANS in particular when predicting the behaviour of the separated flows around buildings, its computational cost for modelling full scale geometries is very high. Hence RANS models are still widely used.…”

Section: Building Scalementioning

confidence: 99%

“…Toja-Silva et al [75] expanded their work by studying the impact of roof solar panels on wind turbines. The solar panels were simulated with tilt angles of 10-30 • .…”

Section: Building Scalementioning

confidence: 99%

A Review of Numerical Modelling of Multi-Scale Wind Turbines and Their Environment

et al. 2018

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Abstract:Global demand for energy continues to increase rapidly, due to economic and population growth, especially for increasing market economies. These lead to challenges and worries about energy security that can increase as more users need more energy resources. Also, higher consumption of fossil fuels leads to more greenhouse gas emissions, which contribute to global warming. Moreover, there are still more people without access to electricity. Several studies have reported that one of the rapidly developing source of power is wind energy and with declining costs due to technology and manufacturing advancements and concerns over energy security and environmental issues, the trend is predicted to continue. As a result, tools and methods to simulate and optimize wind energy technologies must also continue to advance. This paper reviews the most recently published works in Computational Fluid Dynamic (CFD) simulations of micro to small wind turbines, building integrated with wind turbines, and wind turbines installed in wind farms. In addition, the existing limitations and complications included with the wind energy system modelling were examined and issues that needs further work are highlighted. This study investigated the current development of CFD modelling of wind energy systems. Studies on aerodynamic interaction among the atmospheric boundary layer or wind farm terrain and the turbine rotor and their wakes were investigated. Furthermore, CFD combined with other tools such as blade element momentum were examined. Keywords:Computational Fluid Dynamic (CFD); micro to small wind turbine; building integrated with wind turbine; wind farm; aerodynamic interaction; wind energy systems; atmospheric boundary layer (ABL); blade element momentum (BEM)

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“…Even in some cases with both, such as the case of [241] analysis of wind flow around buildings and their effects on roof-mounted solar panels.…”

Section: Aerodynamic Loads On Scale Models For Buildingsmentioning

confidence: 99%

A review on experimental research using scale models for buildings: Application and methodologies

Lirola

Castañeda

Lauret

et al. 2017

Energy and Buildings

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a b s t r a c tA complete review on scale model testing for buildings, considering a wide range of methodologies and new manufacturing techniques, in areas such as statics and dynamics, acoustics, lighting, aerodynamics and thermodynamics for energy efficiency is presented. On the one hand, scale model testing for buildings require different considerations and techniques and are usually focused on one specific physical field contributing to the information scattering. On the other hand, they are sometimes too general, theoretical or unpractical. Although commercial computer simulations are first option among professionals, they necessarily simplify complex phenomena and ignore, among other aspects, size effects and latest findings in fractals. The potential of complementary experiments using new manufactured scale models for buildings is raising, however, it is still missing a practical overview through different physical fields specifically for buildings with these considerations. This review gives a wide perspective and unified scope on uses and possibilities of scale model testing for buildings, from the traditional configurations of Leon Battiste Alberti to new possibilities applying complex physics and new techniques of 3D-modelling.

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Effect of roof-mounted solar panels on the wind energy exploitation on high-rise buildings

Cited by 35 publications

References 38 publications

On Roof Geometry for Urban Wind Energy Exploitation in High-Rise Buildings

On Roof Geometry for Urban Wind Energy Exploitation in High-Rise Buildings

A Review of Numerical Modelling of Multi-Scale Wind Turbines and Their Environment

A review on experimental research using scale models for buildings: Application and methodologies

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