2022 MAY 24 (NewsRx) -- By a News Reporter-Staff News Editor at Energy Daily News -- Investigators publish new report on Energy - Energy Conversion and Management. According to news originating from Shenzhen, People’s Republic of China, by NewsRx correspondents, research stated, “Although freestream turbulence is believed to improve the efficiency of vertical axis wind turbines (VAWTs), few studies have systematically assessed VAWT performance in turbulent environments. In this study, steel and aluminum grids were used to simulate the turbulence field.”
Funders for this research include Shenzhen Science and Technology Innovation Committee, National Natural Science Foundation of China (NSFC), Characteristic and Innovation Projects of Universities in Guangdong Province.
Our news journalists obtained a quote from the research from the Harbin Institute of Technology, “Three turbulence levels of I-u = 5.1%, 10.9% and 14.6% were generated, together with one low turbulence level of 0.9%. First, the parametric effects of solidity ratio sigma, pitch angle beta, and aspect ratio eta were examined in 48 cases in various flow regimes. Then, the Taguchi method with an L-16(4(4)) orthogonal table was implemented to comprehensively and effectively investigate the parametric effects and their extent of impact on VAWT turbine performance. This reduced the number of cases from 256 to 16. Unlike smooth flow, turbulence enhanced the efficiency of the VAWTs, with improvements ranging from 7.9% to 38.0%. The factors influenced efficiency in the following order: beta > sigma > eta > I-u. The VAWT performance peaked at beta = - 6.5 & nbsp;, and revealed that a toe-out pitch ranging from - 9.5 & nbsp; to - 6.5 is required for maximal performance.”
According to the news editors, the research concluded: “The improvements in VAWT efficiency caused by turbulence decreased as a factor approached its optimal value.”
This research has been peer-reviewed.
For more information on this research see: Optimization Analysis of Straight-bladed Vertical Axis Wind Turbines In Turbulent Environments By Wind Tunnel Testing. Energy Conversion and Management, 2022;257. Energy Conversion and Management can be contacted at: Pergamon-elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; Energy Conversion and Management - http://www.journals.elsevier.com/energy-conversion-and-management/)
The news correspondents report that additional information may be obtained from G. Hu, Harbin Institute of Technology, School of Civil and Environmental Engineering, Shenzhen, People’s Republic of China. Additional authors for this research include H. Y. Peng, B. W. Zhong and H. J. Liu.
The direct object identifier (DOI) for that additional information is: https://doi.org/10.1016/j.enconman.2022.115411. This DOI is a link to an online electronic document that is either free or for purchase, and can be your direct source for a journal article and its citation.
(Our reports deliver fact-based news of research and discoveries from around the world.)