TITLE:
The Design of Stall-Regulated Wind Turbine Blade for a Maximum Annual Energy Output and Minimum Cost of Energy Based on a Specific Wind Statistic
AUTHORS:
W. Sridech, T. Chitsomboon
KEYWORDS:
Component, Wind Turbine Blade Design, Annual Power Yield, Local Wind Statistic, Cost of Energy
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.2 No.6,
June
9,
2014
ABSTRACT:
The design of a stall-regulated wind turbine
to achieve a maximum annual energy output is still a formidable task for engineers.
The design could be carried out using an average wind speed together with a standard
statistical distribution such as a Weibull with k = 2.0. In this study a more elaborated
design will be attempted by also considering the statistical bias as a design criterion.
The wind data used in this study were collected from three areas of the Lamtakong
weather station in Nakhonratchasima Provice, the Khaokoh weather station in Phetchaboon
and the Sirindhorn dam weather station in Ubonratchathani, Thailand. The objective
is to design a best aerodynamic configurations for the blade (chord, twist and pitch)
using the same airfoil as that of NREL Phase VI wind turbine. Such design is carried
out at a design wind speed point. Wind turbine blades were optimized for both maximum
annual energy production and minimum cost of energy using a method that take into
account aerodynamic and structural considerations. The work will be carried out
by the program “SuWiTStat” which was developed by the authors and based on BEM Theory
(Blade Element Momentum). Another side issue is the credibility of the Weibull statistic
in representing the real wind measurement. This study uses a regression analysis
to determine this issue.