NDLI: Evaluation of the Power Output of a Wind Turbine With a Brimmed Diffuser Shroud in Fluctuating Flows

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	A, S. Roberto Gonzalez Ohya, Yuji Karasudani, Takashi Iba, Shusaku Watanabe, Kimihiko
Copyright Year	2007
Abstract	Fossil fuels have been used extensively all over the world to satisfy energy demands. However, their availability is limited and their negative impact on the environment undeniable. Due to this, the need to develop alternative energy resources was recognized a few decades ago. Among different alternatives that have been developed, wind energy appears as a promising option to be implemented in many parts of the world. Nonetheless, its development and the cost per kW are still higher than that from fossil fuels. The intermittence of its capability to produce energy and the size of the wind power plant (as compared to a coal or nuclear power plant of the same energy output) have not made its implementation easier. In order to make wind energy more competitive and attractive to investors, new energy systems are desired. Specifically, it is desired to have a higher energy output. In this study a brimmed-diffuser shroud was incorporated into a 1 kW wind turbine. The turbine was then evaluated under fluctuating wind conditions. The experiments were conducted at the large boundary wind tunnel of Kyushu University. It is shown that power output increases for a fluctuating flow as opposed to a steady flow. The turbine power output is capable of following the changes in the wind speed accurately in the range of wind speed fluctuations tested. This is shown by correlation analysis and supported by the frequency spectrum. This study is part of a larger research work aimed at evaluating a novel wind turbine design. The current results are very encouraging. Possible wind sites of wind speed average lower than the current minimum accepted values can be exploited by using a turbine like the one evaluated in this work.
Sponsorship	Fluids Engineering Division
Starting Page	1063
Ending Page	1068
Page Count	6
File Format	PDF
ISBN	0791842894
DOI	10.1115/FEDSM2007-37466
e-ISBN	0791838056
Volume Number	Volume 2: Fora, Parts A and B
Conference Proceedings	ASME/JSME 2007 5th Joint Fluids Engineering Conference
Language	English
Publisher Date	2007-07-30
Publisher Place	San Diego, California, USA
Access Restriction	Subscribed
Subject Keyword	Wind Wind tunnels Wind velocity Fossil fuels Energy / power systems Flow (dynamics) Design Wind energy Renewable energy Coal Fluctuations (physics) Wind farms Diffusers Wind turbines Nuclear power stations Turbines
Content Type	Text
Resource Type	Article

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