A New Method for Horizontal Axis Wind Turbine (HAWT) Blade Optimization

Abstract

Iran has a great potential for wind energy. This paper introduces optimization of 7 wind turbine blades for small and medium scales in a determined wind condition of Zabol site, Iran, where the average wind speed is considered 7 m /s. Considered wind turbines are 3 bladed and radius of 7 case study turbine blades are 4.5 m, 6.5 m, 8 m, 9 m, 10 m, 15.5 m and 20 m. As the first step, an initial design is performed using one airfoil (NACA 63-215) across the blade. In the next step, every blade is divided into three sections, while the 20 % of first part of the blade is considered as root, the 5% of last the part is considered as tip and the rest of the blade as mid part. Providing necessary input data, suitable airfoils for wind turbines including 43 airfoils are extracted and their experimental data are entered in optimization process. Three variables in this optimization problem would be airfoil type, attack angle and chord, where the objective function is maximum output torque. A MATLAB code was written for design and optimization of the blade, which was validated with a previous experimental work. In addition, a comparison was made to show the effect of optimization with two variables (airfoil type and attack angle) versus optimization with three variables (airfoil type, attack angle and chord) on output torque increase. Results of this research shows a dramatic increase in comparison to initial designed blade with one airfoil where two variable optimization causes 7.7% to 22.27 % enhancement and three variable optimization causes 17.91% up to 24.48% rise in output torque .Article History: Received Oct 15, 2015; Received in revised form January 2, 2016; Accepted January 14, 2016; Available online How to Cite This Article: Mohammadi, M., Mohammadi, A. and Farahat, S. (2016) A New Method for Horizontal Axis Wind Turbine (HAWT) Blade Optimization. Int. Journal of Renewable Energy Development, 5(1),1-8. http://dx.doi.org/10.14710/ijred.5.1.1-8

Kajian Perbandingan Performance Energi Turbin Angin Model Ducted Dengan Un-Ducted

“…Ada dua tipe turbin yakni Turbin Angin Sumbu Horizontal (TASH) [9][10] [11] [12] dengan Turbin Sumbu Vertical (TASV) [13][14][15] [16].…”

Parametric study of a horizontal axis wind turbine with similar characteristics to those of the Villonaco wind power plant

“…The following airfoils are used: NACA 4415, 4418, 4421, 4424, 4430 and 4436 (Fuglsang et al, 2004;Khaled et al, 2017;Mamadaminov, 2013;Manwell et al, 2009). These are located in the blade according to defined considerations used by (Mohammadi et al, 2016) and (Adaramola, 2014). Using the XFOIL software the lift and drag coefficients are evaluated (Manwell et al, 2009; Massachusetts Institute of Technology, 2013).…”

Nonlinear backstepping control for PMSG wind turbine used on the real wind profile of the Dakhla‐Morocco city

“…The power coefficient C p depends on the tip speed ratio (TSR) denoted by ( λ ) and the pitch angle ( β ) according to the relation below: where β represents the blade pitch angle (in degrees). The TSR can be defined according to the relationship of Equation (4): …”

“…The power coefficient C p depends on the tip speed ratio (TSR) denoted by (λ) and the pitch angle (β) according to the relation below 25 :…”