The insight investigation on the performance affecting parameters of Micro wind turbines

[摘要] The large to small wind turbines have been investigated for past few decades, but only a few have conducted the investigation on micro wind turbines, whose power rating and rotor diameters are less than 1 kW and 1.5 m respectively. The growing utilization of power electronic devices creates space for the development of micropower harvesting that could be used for standalone charging applications. The theoretical investigation is conducted on rotor diameter of 30 cm and which is targeted to operate at the cut in, rated and cut out wind speed of 4 ms -1 , 7 ms -1 and 11 ms -1 respectively with the rated tip speed ratio ranging from 2.5 to 4. The airfoils SD7037, E193, RG15, SG6041, SG6051 and S7012 are shortlisted on the basis of the prior aerodynamic investigation, and this study aims to improve the performance of MWT rotor at 7 ms -1 . The different chord and twist equations are used to determine the optimum blade geometry with trade-offs between the better starting and maximum performance. The turbines with RG15 and SD7037 attains the maximum power of 2.3 W at a wind speed of 7 ms -1 of wind speed and design TSR of 2.5 leading to better annual energy production.

[发布机构] National Institute of Technology, Tiruchirappalli, India^1

[效力级别] 生态环境科学 [学科分类] 环境科学（综合）

[关键词] Annual energy productions;Blade geometry;Micro-wind turbines;Power electronic devices;Rotor diameter;Small wind turbine;Theoretical investigations;Tip speed ratio