Technology effects in repowering wind turbines
Technology effects in repowering wind turbines
复制标题
风力涡轮机重新供电的技术效果
作者：
Roberto Lacal;A. Uihlein;J. Yusta
本研究调查、分析和量化了风力涡轮机改造的技术效果（即，拆除旧涡轮机，在相同或非常接近的位置安装新涡轮机，包括提高能源生产性能）。在这些情况下，假设新旧涡轮机都受到相同的风况，而不是因为技术因素，如轮毂高度，因此可以将新技术的影响与当地风况变化的影响隔离开来。本研究基于对丹麦和德国涡轮机重新供电的经验数据分析，以及数据集丹麦部分的历史生产数据。预计技术创新将使新的风力涡轮机能够在重新供电现场捕获更多的能量，主要是通过更大的转子和更高的轮毂高度，这就是这项研究所分析的。结果表明，改造项目中的新涡轮机是旧涡轮机的两倍高，转子直径是旧涡轮机的三倍，扫掠面积是旧涡轮机的九倍，标称功率是旧涡轮机的六倍，电力是旧涡轮机的九倍。然而，最显著的改进可能是容量系数在每个涡轮机基础上增加了7.1%，或在每次生产基础上增加了9.7%。
This research investigates, analyses, and quantifies the technological effects of wind turbine repowering (ie, where old turbines are removed and new turbines are installed at the same or a very close location, including the enhanced performance in energy production). In these cases, it is assumed that both old and new turbines are subject to the same wind regime, other than because of technological elements, such as hub height, and thus it is possible to isolate the effects of new technology from the effect of changing local wind conditions. This research is based on the analysis of empirical data on repowering turbines in Denmark and Germany, and on historical production data available for the Danish component of the data set. Technological innovations are expected to enable new wind turbines to capture more energy at the repowering site, mostly through larger rotors and higher hub heights, and this is what this study has analysed. The results show that new turbines in repowering projects are twice as high, have three times the rotor diameter, nine times the swept area, six times the nominal power, and nine times as much electricity as the old turbines. However, the most significant improvement is probably the increase of capacity factor of 7.1% on a per ‐ turbine basis, or 9.7% on a per ‐ production basis.