Influence of Roof Shape on Micrositing of Rooftop Wind Turbine in the Building Group

doi:10.3901/JME.2018.02.191

Journal of Mechanical Engineering ›› 2018, Vol. 54 ›› Issue (2): 191-200.doi: 10.3901/JME.2018.02.191

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Influence of Roof Shape on Micrositing of Rooftop Wind Turbine in the Building Group

HOU Yali^1,2, WANG Jianwen^1,2, WANG Qiang³, WANG Xinting¹

1. College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051;
2. Key Laboratory of Wind Energy and Solar Energy Technology of Ministry of Education, Inner Mongolia University of Technology, Hohhot 010051;
3. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027

Received:2016-10-10 Revised:2017-05-09 Online:2018-01-20 Published:2018-01-20

Abstract

Abstract: The purpose is to explore the flow pattern, wind velocity and turbulence intensity over the aligned arrays buildings with flat roof, gabled roof, pyramidal roof, and pitch roof, respectively. The suitable wind profile based on urban rough atmospheric boundary layer is applied in the inflow condition and Realizable k-ε turbulence model is utilized in the simulations. Results from this investigation shown that the flat roof is the best for installation of the wind turbine, then the pyramidal roof is the secondary, and the pitch and gabled roof are the worst. Meanwhile, the installation height must be higher than 1.1 times of these four rooftop. For the non-flap buildings, it is not suitable to install the wind turbine at the height lower than the top of the building, while the eaves of the rooftop are the best installation locations. Moreover, for the height is higher than 1.2H, the wind turbine should be installed at the front row of the building group, where the wind turbine exposes to the wind flow without high turbulence intensity, and the capability of wind flow recovery varies with the different roof shape. For the height is higher than 1.5H, the influence of the roof shape can be ignored, and the wind turbine can be installed at the arbitrary locations at the rooftop in the building group.

Key words: micrositing, roof shape, rooftop wind turbine, turbulence intensity, wind acceleration factor

CLC Number:

TK513

HOU Yali, WANG Jianwen, WANG Qiang, WANG Xinting. Influence of Roof Shape on Micrositing of Rooftop Wind Turbine in the Building Group[J]. Journal of Mechanical Engineering, 2018, 54(2): 191-200.

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Influence of Roof Shape on Micrositing of Rooftop Wind Turbine in the Building Group

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