Study of High Efficiency Small Diameter Annular Wind Turbines by Means of CAE Techniques

Author

Pitzalis, Francesco ; Corino, Nicola ; Ottella, Marco ; Perlo, Pietro ; Guglielmi, Paolo

Author_Institution

Centro Ricerche Fiat, Orbassano

fYear

2007

Firstpage

706

Lastpage

713

Abstract

The report describes the design criteria for high efficiency small-scale wind turbines. While the overall wind to electrical conversion efficiency for large diameter rotors can be set at around 50%, the design of conventional wind turbines with diameters below 0,5 m is limited by air turbulence and low electrical efficiency. Coupling a ring shaped generator with ducted blades an overall efficiency of the order of 32% for a diameter of 200 mm is feasible. This together with low friction bearings allows a starting operation at wind speeds of 1m/s.

Keywords

permanent magnet generators; wind power plants; CAE techniques; air turbulence; annular wind turbines; efficiency 32 percent; efficiency 50 percent; electrical conversion efficiency; large diameter rotors; ring shaped generator; size 0.5 m; size 200 mm; Aerodynamics; Blades; Computer aided engineering; Friction; Propellers; Rotors; Wind energy generation; Wind power generation; Wind speed; Wind turbines;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 2007. 42nd IAS Annual Meeting. Conference Record of the 2007 IEEE

Conference_Location

New Orleans, LA

ISSN

0197-2618

Print_ISBN

978-1-4244-1259-4

Electronic_ISBN

0197-2618

Type

conf

DOI

10.1109/07IAS.2007.112

Filename

4347861