Optimizing Small Wind Turbine Blades: A BEMT Approach Optimizing Small Wind Turbine Blades: A BEMT Approach

Tshepo Sithole, Lukas W. Snyman, Vasudeva R. Veeredhi, Thembelani Sithebe

Abstract


This paper explores the optimization of small wind turbine blades, focusing on the design and utilization of theoretical algorithms such as computational fluid dynamics (CFD), blade elementary method (BEM) theory, and the vortex wake system (VWS). Among these methods, BEM theory has proven to be the most effective in optimizing horizontal-axis wind turbine (HAWT) blades and is commonly employed in modeling and constructing small wind turbine blades. The study centers on designing and optimizing aerofoils to enhance rotor blade pitch angles and determining the optimal number of blades for maximizing power output at various wind speeds using BEMT. Using a NACA-4412 type aerofoil as the starting point, the paper investigates different pitch angles, blade radii, and chord lengths for Designs 1, 2, and 3. Results indicate that at an average wind speed of 0 - 2.3 m/s (8.28 km/h), 3-blade, 5-blade, and 7-blade sets were designed and optimized for performance. The predictions suggest rated outputs of 7.5 W, 20 W, and 40 W for Designs 1, 2, and 3, respectively. The study reveals that Design 3, with a blade radius of 1m, a chord length of 0.1m, and a pitch angle ranging from 12° near the rotor hub to 2° at the blade radius tip, achieved a significant power output of 39.5 W at a wind speed of 4.2 km/h. The findings contribute valuable insights into optimizing wind turbine blade design for enhanced energy efficiency.

Keywords


Aerofoil design, Blade optimization, BEM theory, Small wind turbines, Pitch angle, Wind turbine performance

Full Text:

PDF

References


B. Subhadeep."Wind power technology." In

Sustainable Fuel Technologies Handbook, 2021, pp. 123-170.

B. Lawson. Wind Power (Technology and Econ

omics).(2014),https://fusion4freedom.com/wind-po

wer-technology-and-economics/

U. Dallatu Abbas, C. Tak Yaw, S. Paw Koh, S. Kiong Tiong, A. Ahmed Alkahtani, and T. Yusaf. "Design and optimization of a small-scale horizontal axis wind turbine blade for energy harvesting at low wind profile areas." Energies. Vol. 15, no. 9, 2022, pp. 3033.

S. Ojing, N. Sahoo, and U.K. Saha. "Wind tunnel tests of a model small-scale horizontal-axis wind turbine developed from blade element momentum theory." Journal of Energy Resources Techno

logy. Vol.144, no. 6, 2022, pp. 064502.

A.Suresh, and S.Rajakumar. "Design of small horizontal axis wind turbine for low wind speed rural applications." Materials Today: Proceedings 23, 2020, pp. 16-22.

C. Manoj Kumar. and S. Prakash. "Experimental investigations and aerodynamic shape optimization of small horizontal-axis wind turbine blades.

" Transactions of the Canadian Society for Mechanical Engineering. Vol.45, no.4,(2021), pp. 594-603.

C. Manoj Kumar. and S. Prakash. "Investigation of blade geometry and airfoil for small wind turbine blade." Advanced Science, Engineering and Medicine. Vol.11, no. 5, 2019, pp. 448-452.

O. Emmanuel Yeboah, R. Opoku, A. K. Sunnu, and M.S. Adaramola. "Development of high performance airfoils for application in small wind turbine power generation." Journal of Energy. 2020, pp. 1-9.

Y. El-Okda, K. Adref, M. Chikhalsouk and H. Al Hajjar. Design of a Small Horizontal Axis Wind Turbine. In2019 Advances in Science and Engineering Technology International Conferences (ASET). 2019, pp. 1-7. IEEE.

L.A. Gemaque Miriam, R.P. Jerson Vaz, and O.R. Saavedra. "Optimization of hydrokinetic swept blades." Sustainability”. Vol.14, no. 21, 2022, pp. 13968.

S. Boga, K. Sohan, .L.K. Nallavelli and G.K. Reddy. Design and Analysis of Wind Blades using Blade

Element Momentum Theory. Anveshana’s Int

ernational Journal of Research in Engineering and Applied Sciences. Vol.6. no.6, 2021, pp. 18 - 26

P.J. Schubel, and J.C. Richard. "Wind turbine blade design review." Wind engineering. Vol.36, no. 4, 2012, pp. 365-388.

A.R. Sudhamshu, M.C. Pandey, N. Sunil, N.S. Satish, V. Mugundhan, and R.K. Velamati,. Numerical study of effect of pitch angle on performance characteristics of a HAWT. Engineering Science and Technology, an International Journal. Vol. 19, no. 1, 2016, pp. 632-641.

A. Musyafa, A.J. Adi. and H. Cordova. Implementation of Fuzzy Logic Control (FLC) In Horizontal Axis Wind Turbine Prototype with Airfoil Profile NREL Standard S83 at Low Rate Wind Speed. Australian Journal of Basic and Applied Sciences. Vol.8, no. 13, 2014, pp. 61-68.

M.R. Djalal, A. Imran, and H. Setiadi. “Desain Sistem Kontrol Pitch Angle Wind Turbine Horizontal Axis Menggunakan Firefly Algorithm”. Jurnal Teknik Elektro. Vol. 9, no.1, 2017, pp.1-6.

J.F. Manwell, J.G. McGowan, and A.L. Rogers. Wind energy explained: theory, design and application. John Wiley & Sons, 2010.

T. Ahmed, M. Elgabaili, Z. Rajab, N. Buaossa, A. Khalil, and F. Mohamed. "Optimization of small wind turbine blades using improved blade element momentum theory." Wind Engineering. Vol. 43, no. 3 2019, pp. 299-310.

A. Hamid, S.L. Steen. Numerical calculations of propeller shaft loads on azimuth propulsors in oblique inflow. Sverre Journal of marine science and technology. Vol. 17, no. 4, 2012, pp. 403-421.

H. Arash, W. Jonathan Naughton, C. L. Kelley, and D. C. Maniaci. "Wind turbine blade design for subscale testing." In Journal of Physics: Conference Series, Vol. 753, no. 2, 2016, pp. 022048.

Shanghai Star Creation Group Co. Off-grid wind turbine systems. (2012). https://tinyurl.com/y5aycs5j

T. Sithole, V.R Veeredhi, and T. Sithebe. "The Predictive Study on Soweto Wind Turbine Results and Port-Elizabeth." International Journal of Electrical, Energy and Power System Engineering. Vol. 6, no. 2, 2023, pp. 140-144.




DOI: http://dx.doi.org/10.47238/ijeca.v8i2.227

Refbacks

  • There are currently no refbacks.


Copyright (c) 2023 International Journal of Energetica

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Creative Commons License
The content of this journal is licenced under a Creative Commons Attribution-NonCommercial 4.0 International License