%0 Journal Article
%T Surface-layer Wind Energy Resources over the Poyang Lake Area<br>鄱阳湖区近地层风能资源特征研究
%A HE Zhiming
%A NIE Qiusheng
%A LIU Ximing
%A WU Qing
%A <br>贺志明
%A 聂秋生
%A 刘熙明
%A 吴琼
%J 资源科学
%D 2011
%I 
%X Based on ten-minute gradient wind observations of the latest year obtained from four meteorological towers in the Poyang Lake area, characteristics of average wind speed and parameters associated with wind energy resources were comprehensively analyzed. In terms of numerical simulation results from the MM5 model which were validated, we calculated wind energy resources around the Poyang Lake area covering an area of 30 344.2 km2. It was found that there are approximately 54 559 ×106 W exploitable wind energy resources in terms of wind power density larger than 150W/m2 at a 50 m height. Using the numerical simulations combined with ground-based measurements, it was found that the most abundant wind resources are primarily distributed over the lakeshore and mountain around the lake in the northern Poyang Lake area. In long and narrow areas of the lake, such as Zhaohu, Changling, Daling, Jishanhu, and Laoyemiao, the mean annual average wind speed is generally over 6.0 m/s and the mean annual wind power density was estimated to be 300 W/m2 at a 10 m height. But in areas around the long and narrow lake and around the southern portion of the lake, the wind speed decreases significantly, suggesting a mean annual speed of (4~ 5) m/s, and a mean annual wind power density ranging from 120 to 180 W/m2. As far as temporal distribution is concerned, the wind speed is largest in winter and smallest in June. It was also found that over the Poyang lake area, the wind speed increases incrementally with height, so the wind shear index is significantly smaller than that in the plain. The average wind shear index of the four meteorological towers is 0.083, 0.094, 0.009, and 0.020, respectively. The effect of narrow tube makes the wind speed increase significantly. As for the topographic effects on near-surface wind energy resources, the distribution of wind profile maintains almost the same in northern Poyang Lake, but varies greatly outside and inside the narrow tube area. The turbulence intensities at low elevations are essentially stronger than that at high elevations, and vary slightly with height in the ridge. The turbulence intensities in the narrow tube area are smaller than that in other open areas. In the Poyang Lake area, the values of the Weibull scale factor are generally between 1.49 and 1.84 at all levels. The values of the Weibull shape parameter are from 1.49 to 1.84. The shape parameter at Changling and the scale factor at Sheshan are different from the other two wind towers.
%K Wind energy resources
%K Characteristics
%K Poyang Lake Area<br>风能资源
%K 特征
%K 鄱阳湖区
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=9DEEAF23637E6E9539AD99BE6ABAB2B3&aid=B8298E4428B3B9256F4B721617D8724E&yid=9377ED8094509821&vid=27746BCEEE58E9DC&iid=CA4FD0336C81A37A&sid=798FBE8DE1A255B1&eid=AC1578C6BB9EBDEF&journal_id=1007-7588&journal_name=资源科学&referenced_num=0&reference_num=12