Abstract
The current direction of wind turbine development is more on horizontal wind turbine types because of its efficiency, which is better than vertical wind turbines. But there are some advantages of this vertical wind turbine in the kind of array turbines and small-sized turbines. In this paper, the research focuses on developing a vertical wind turbine between Savonius and Darrieus turbines and has a dual shaft on one wind energy generating unit.Vertical turbine design with two turbine shafts placed close together is intended to increase turbine efficiency and increase power density. But this design also affects the omnidirectional nature of the vertical single shaft turbine.This research investigates the change in the omnidirectional nature of the hybrid vertical turbine dual shaft design and the influence of models of a fin to restore the properties of the omnidirectional turbine. Then tests the performance between prototype using the directional fins and without using the directional fins.Omnidirectional nature is one of the advantages in vertical turbines, but in the design with two axes, the omnidirectional nature changes and can affect the overall vertical turbine performance.The experiment results show that the vertical shaft hybrid turbines still have omnidirectional properties, and the use of fins increases the TSR (Tips Speed ratio) value of wind speed, increases the Cp (Power coefficient) of the wind turbine and increases the mechanical power potential of the turbine.
Highlights
The development of research in vertical wind turbines is not as fast as the development of horizontal turbines, but vertical turbines have several advantages over horizontal turbines, namely better power density, shorter wake effect than horizontal [1, 2].Investigation of the suitability of wind turbine types in the tropical country shows that vertical wind turbines of small size are more appropriate than horizontal wind turbines [3].Improvement of hybrid vertical wind turbines with two turbine shafts in one turbine unit is aimed at improving turbine performance and efficiency [4], intended for wind hybrid renewable energy generation and biomass gasification [5]
Vertical turbines have great potential to be used as farm arrays, but the questions connected with turbine performance with changes in wind direction remained unresolved
Eastern-European Journal of Enterprise Technologies ISSN 1729-3774. All this allows us to argue that it is advisable to conduct a study on the analysis of changes in vertical wind turbine performance using directional fin
Summary
The development of research in vertical wind turbines is not as fast as the development of horizontal turbines, but vertical turbines have several advantages over horizontal turbines, namely better power density, shorter wake effect than horizontal [1, 2]. Improvement of hybrid vertical wind turbines with two turbine shafts in one turbine unit is aimed at improving turbine performance and efficiency [4], intended for wind hybrid renewable energy generation and biomass gasification [5]. New problems arise with the changing omnidirectional nature of single shaft turbines to dual-shaft turbines. Vertical hybrid turbines have been developed by the authors to be combined with thermal biomass [5]. The wake effect that arises in farm array has been investigated by using computational fluid dynamics [6]
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