Impacts of solidity and hybrid system in small wind turbines performance
Impacts of solidity and hybrid system in small wind turbines performance
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DOI：
10.1016/j.energy.2013.06.004
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发表时间：
2013-08
期刊：
影响因子：
9
通讯作者：
M. H. Mohamed
中科院分区：
文献类型：
--
作者：
M. H. Mohamed
风能是当今许多国家非常重要的能源。风能为减少燃料消耗和污染物排放提供了一种高效有效的解决方案。VAWTs（垂直轴风力涡轮机）最初被认为是非常有前途的，直到被现在的水平轴风力涡轮机所取代。现在，人们对vawt的兴趣重新抬头，尤其是Darrieus涡轮机。VAWTs（垂直轴风力涡轮机）像Darrieus涡轮机似乎特别有希望在低风速的条件下，但与水平轴涡轮机相比，其效率较低。此外，vawt并不总是自动启动，这是一个主要缺点。本文介绍了达瑞乌斯水轮机自稳态能力存在的主要问题，并探讨了改进这一缺陷的技术。本文采用计算流体力学（CFD）技术和实验方法，研究了涡轮固体度的影响以及阻力和升力混合系统的使用情况。通过这些技术，h转子达瑞乌斯涡轮的自启动能力得到了相当大的提高。
Wind energy represents a very important source of energy for many countries nowadays. Wind energy provides an efficient and an effective solution to reduce fusel fuel consumption as well as pollutant emissions. VAWTs (vertical axis wind turbines) were originally considered as very promising, before being subrogated by the present, horizontal axis turbines. There is now a resurgence of interests for VAWTs, in particular Darrieus turbines. VAWTs (vertical axis wind turbines) like the Darrieus turbine appear to be particularly promising for the conditions of low wind speed, but suffer from a low efficiency compared to horizontal axis turbines. Additionally, VAWTs are not always self-starting, which is a major drawback. The present paper introduces the main problem of the self-stating capability of Darrieus turbine and investigates some techniques to improve this drawback. The effect of the turbine solidity and the usage of hybrid system between drag and lift types have been investigated in this paper numerically using CFD (Computational Fluid Dynamics) technique and experimentally. A considerable improvement of the H-rotor Darrieus turbine self-starting capability can be obtained by these techniques.