Numerical Investigation of Wind Conditions for Roof-Mounted Wind Turbines: Effects of Wind Direction and Horizontal Aspect Ratio of a High-Rise Cuboid Building
From the viewpoint of installing small wind turbines (SWTs) on rooftops, this study investigated the effects of wind direction and horizontal aspect ratio (HAR = width/length) of a high-rise cuboid building on wind conditions above the roof by conducting large eddy simulations (LESs). The LES result...
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| Format: | Article |
| Language: | English |
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MDPI AG
2016-11-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/9/11/907 |
| _version_ | 1798024587000152064 |
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| author | Takaaki Kono Tetsuya Kogaki Takahiro Kiwata |
| author_facet | Takaaki Kono Tetsuya Kogaki Takahiro Kiwata |
| author_sort | Takaaki Kono |
| collection | DOAJ |
| description | From the viewpoint of installing small wind turbines (SWTs) on rooftops, this study investigated the effects of wind direction and horizontal aspect ratio (HAR = width/length) of a high-rise cuboid building on wind conditions above the roof by conducting large eddy simulations (LESs). The LES results confirmed that as HAR decreases (i.e., as the building width decreases), the variation in wind velocity over the roof tends to decrease. This tendency is more prominent as the angle between the wind direction and the normal vector of the building’s leeward face with longer roof edge increases. Moreover, at windward corners of the roof, wind conditions are generally favorable at relatively low heights. In contrast, at the midpoint of the roof's windward edge, wind conditions are generally not favorable at relatively low heights. At leeward representative locations of the roof, the bottoms of the height range of favorable wind conditions are typically higher than those at the windward representative locations, but the favorable wind conditions are much better at the leeward representative locations. When there is no prevailing wind direction, the center of the roof is more favorable for installing SWTs than the corners or the edge midpoints of the roof. |
| first_indexed | 2024-04-11T18:04:59Z |
| format | Article |
| id | doaj.art-1e859aca37614d788ae558a6d1f2a149 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T18:04:59Z |
| publishDate | 2016-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-1e859aca37614d788ae558a6d1f2a1492022-12-22T04:10:21ZengMDPI AGEnergies1996-10732016-11-0191190710.3390/en9110907en9110907Numerical Investigation of Wind Conditions for Roof-Mounted Wind Turbines: Effects of Wind Direction and Horizontal Aspect Ratio of a High-Rise Cuboid BuildingTakaaki Kono0Tetsuya Kogaki1Takahiro Kiwata2Institute of Science and Engineering, Kanazawa University, Kanazawa 920-1192, JapanNational Instiute of Advanced Industrial Science and Technology, Koriyama 963-0298, JapanInstitute of Science and Engineering, Kanazawa University, Kanazawa 920-1192, JapanFrom the viewpoint of installing small wind turbines (SWTs) on rooftops, this study investigated the effects of wind direction and horizontal aspect ratio (HAR = width/length) of a high-rise cuboid building on wind conditions above the roof by conducting large eddy simulations (LESs). The LES results confirmed that as HAR decreases (i.e., as the building width decreases), the variation in wind velocity over the roof tends to decrease. This tendency is more prominent as the angle between the wind direction and the normal vector of the building’s leeward face with longer roof edge increases. Moreover, at windward corners of the roof, wind conditions are generally favorable at relatively low heights. In contrast, at the midpoint of the roof's windward edge, wind conditions are generally not favorable at relatively low heights. At leeward representative locations of the roof, the bottoms of the height range of favorable wind conditions are typically higher than those at the windward representative locations, but the favorable wind conditions are much better at the leeward representative locations. When there is no prevailing wind direction, the center of the roof is more favorable for installing SWTs than the corners or the edge midpoints of the roof.http://www.mdpi.com/1996-1073/9/11/907roof-topsmall wind turbine (SWT)wind conditionhorizontal aspect ratiowind directionlarge-eddy simulation (LES) |
| spellingShingle | Takaaki Kono Tetsuya Kogaki Takahiro Kiwata Numerical Investigation of Wind Conditions for Roof-Mounted Wind Turbines: Effects of Wind Direction and Horizontal Aspect Ratio of a High-Rise Cuboid Building Energies roof-top small wind turbine (SWT) wind condition horizontal aspect ratio wind direction large-eddy simulation (LES) |
| title | Numerical Investigation of Wind Conditions for Roof-Mounted Wind Turbines: Effects of Wind Direction and Horizontal Aspect Ratio of a High-Rise Cuboid Building |
| title_full | Numerical Investigation of Wind Conditions for Roof-Mounted Wind Turbines: Effects of Wind Direction and Horizontal Aspect Ratio of a High-Rise Cuboid Building |
| title_fullStr | Numerical Investigation of Wind Conditions for Roof-Mounted Wind Turbines: Effects of Wind Direction and Horizontal Aspect Ratio of a High-Rise Cuboid Building |
| title_full_unstemmed | Numerical Investigation of Wind Conditions for Roof-Mounted Wind Turbines: Effects of Wind Direction and Horizontal Aspect Ratio of a High-Rise Cuboid Building |
| title_short | Numerical Investigation of Wind Conditions for Roof-Mounted Wind Turbines: Effects of Wind Direction and Horizontal Aspect Ratio of a High-Rise Cuboid Building |
| title_sort | numerical investigation of wind conditions for roof mounted wind turbines effects of wind direction and horizontal aspect ratio of a high rise cuboid building |
| topic | roof-top small wind turbine (SWT) wind condition horizontal aspect ratio wind direction large-eddy simulation (LES) |
| url | http://www.mdpi.com/1996-1073/9/11/907 |
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