Abstract
Technology of wind exploitation has been applied widely all over the world and has already reached the level in which manufacturers want to maximize the yield with the minimum investment outlays. The main objective of this paper is the determination of the optimal number of blades in the Cup-Bladed Vertical Axis Wind Turbine. Optimizing the size of the Vertical Axis Wind Turbine allows the reduction of costs. The maximum power of the rotor is selected as the performance target. The optimum number of Vertical Axis Wind Turbine blades evaluation is based on analysis of a single blade simulation and its superposition for the whole rotor. The simulation of working blade was done in MatLab environment. Power spectrum graphs were prepared and compared throughout superposition of individual blades in the Vertical Axis Wind Turbine rotor. The major result of this research is the Vertical Axis Wind Turbine power characteristic. On the basis of the analysis of the power spectra, optimum number of the blades was specified for the analysed rotor. Power spectrum analysis of wind turbine enabled the specification of the optimal number of blades, and can be used regarding investment outlays and power output of the Vertical Axis Wind Turbine.
Highlights
European Union directives, as well as increasing environmental awareness, together with decreasing energy resources of the planet, are forcing us to look for non-conventional and renewable energy sources at the same time
Wind energy has become an important source of electricity production due to its abundance in nature and low environmental pollution
Cup-bladed carousel turbine is operating on the same principle as the Savonius turbine and is one of the simplest wind turbines
Summary
European Union directives, as well as increasing environmental awareness, together with decreasing energy resources of the planet, are forcing us to look for non-conventional and renewable energy sources at the same time. The use of these resources for economic reasons is less profitable than obtaining energy from fossil fuels, so renewables must be subsidized or protected by the government [1]. This does not remove the search for more efficient solutions. Wind energy has become an important source of electricity production due to its abundance in nature and low environmental pollution. High altitude and low altitude winds exploitation. High altitude winds are considered to be the most promising renewable energy source in the future [4], low altitude wind technologies are well settled and developed. The main advantage of VAWT is a single moving part (the rotor) where no yaw mechanisms are required, simplifying the design configurations significantly [5]
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