Open AccessDesign considerations for a small ducted wind turbine
Author(s) -
Daniel Valyou,
Kenneth D. Visser
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1452/1/012019
Subject(s) - turbine , thrust , control theory (sociology) , rotor (electric) , torque , wind power , maximum power principle , power (physics) , electricity generation , automotive engineering , engineering , computer science , aerospace engineering , mechanical engineering , physics , electrical engineering , voltage , control (management) , quantum mechanics , artificial intelligence , thermodynamics
While ducted wind turbines (DWTs) have not yet enjoyed commercial success, theory has shown their potential and suggests a need to identify and explore key drivers of the design space for DWTs. A governing optimization metric of cost/annual energy production (AEP) was examined and a key cost driver for DWT of turbine thrust identified. A review of generalized actuator disc theory indicated that increasing the axial induction of the duct increases the power/thrust ratio and reduces the cost/AEP. It was shown that the particular selection of the rotor power coefficient, C P, Rotor or the total power coefficient C P, Rotor , as a design parameter, changes the nature of the AEP optimization, either maximizing AEP with C P, Rotor or optimizing C P /C T and minimizing turbine size with C P, Total . Increasing the blade number to raise Cp and lower tip speed ratio optimizes rotor torque as well for generator matching. Iterative interaction between the wind resource, generator specifications, and design elements to minimize cost/AEP is introduced. The relationship between turbine maximum power output and AEP was explored and it was observed that increasing generator size raises AEP/rotor diameter.