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Article

Conceptual Synthesis of Speed Increasers for Wind Turbine Conversion Systems

1
Design of Mechanical Elements and Systems R&D Centre, Transilvania University of Brasov, Brasov 500036, Romania
2
Renewable Energy Systems and Recycling R&D Centre, Transilvania University of Brasov, Brasov 500036, Romania
*
Author to whom correspondence should be addressed.
Energies 2018, 11(9), 2257; https://doi.org/10.3390/en11092257
Received: 30 June 2018 / Revised: 9 August 2018 / Accepted: 22 August 2018 / Published: 27 August 2018
(This article belongs to the Collection Wind Turbines)
Most wind turbines (WT) are of the single-rotor type, which means they are simple, reliable and durable, but unlikely to convert more than 40% of the available wind energy. Different solutions are proposed to minimize WT energy loss and improve performance, such as the use of speed increasers, counter-rotating wind rotors or counter-rotating electric generators. Downsizing the design, saving weight and reducing the cost of WT conversion systems, while increasing their efficiency, have posed constant challenges to WT designers. Nevertheless, very little research in the field is concerned with, and partially recommends, the design of conversion systems. Therefore, the aim of this paper is to propose a specific algorithm for the conceptual synthesis of speed increasers integrated in WT conversion systems, starting with an inventory of all combinations of the main components of a conversion system that prove compatible for efficient functioning. The algorithm is structured in two sections: the first one includes a four-step approach to WT system design, while the second one follows a three-step procedure for identifying the speed increaser concept. Twenty-two variants of speed increasers are further generated and analyzed, four of which are innovative solutions proposed by the authors. The paper also provides guidelines for identifying the WT conversion system concept according to the circumstances of its application. View Full-Text
Keywords: wind energy conversion system; wind turbine; conceptual synthesis; speed increaser; counter-rotating wind rotors; counter-rotating electric generator; structural, kinematic, static analysis wind energy conversion system; wind turbine; conceptual synthesis; speed increaser; counter-rotating wind rotors; counter-rotating electric generator; structural, kinematic, static analysis
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MDPI and ACS Style

Saulescu, R.; Neagoe, M.; Jaliu, C. Conceptual Synthesis of Speed Increasers for Wind Turbine Conversion Systems. Energies 2018, 11, 2257. https://doi.org/10.3390/en11092257

AMA Style

Saulescu R, Neagoe M, Jaliu C. Conceptual Synthesis of Speed Increasers for Wind Turbine Conversion Systems. Energies. 2018; 11(9):2257. https://doi.org/10.3390/en11092257

Chicago/Turabian Style

Saulescu, Radu, Mircea Neagoe, and Codruta Jaliu. 2018. "Conceptual Synthesis of Speed Increasers for Wind Turbine Conversion Systems" Energies 11, no. 9: 2257. https://doi.org/10.3390/en11092257

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