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| Predicting output power of roof wind turbine with different inflow conditions |
| JING Kunyao1, WANG Jianwen1,2, ZHANG Liru1,2, HE Lingli2 |
| 1.College of Energy and Power Engineering Inner Mongolia University of Technology, Hohhot, Inner Mongolia 010051, China; 2.Key Laboratory for Wind and Solar Power Energy Utilization Technology, Ministry of Education and Inner Mongolia Construction, Hohhot, Inner Mongolia 010051, China |
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Abstract In the light of the complex and variable of terrain and wind energy on the the city building, the index, logarithmic and semilogarithmic wind profiles were established according to 3 kinds of typical surface roughness of urban and suburban to explore the influence of inflow condition on output po-wer of roof wind turbine.An S airfoil horizontal axis wind turbine was selected as the calculation modle, which was mounted at the appropriate location on the flat roof. User Defined Functions was used to load three kinds of inflow conditions, and the turbulence characteristics of the flow field and the output power of the wind turbine were numerically calculated. Results show that under the index, the accelera-tion effect is smaller and the turbulence intensity is higher, not suitable for wind turbine installation. Although the power of wind turbine is higher under logarithmic inflow, turbulence intensity is bigger, the number of wind turbine installation and appropriate location will be reduced, and there exist the problems such as structural damage and cost increase The flow separation,speed block and the turbulence intensity are all small under semi logarithmic inflow, the building wind-collecting effect is obvious, which is suitable to install more wind turbines, and can avoid the damage of wind turbine structure.
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Received: 29 August 2016
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