Optimization of stall regulated rotors
- Risoe National Laboratory, Roskilde (Denmark). Test Station for Wind Turbines
The present work deals with the optimization of stall regulated rotors for wind turbines. Two different optimization methods are presented. The first method is a single design point optimization procedure, whereas the second is a multi pointed optimization technique which is founded on a general optimization algorithm. The use of an optimization algorithm offers the possibility to treat complex optimization problems concerning the entire rotor geometry. The two methods are compared through design of a 20 kW rotor showing good agreement. By use of the optimization algorithm, different aspects of modern wind turbine design layout are investigated. The improvement of the annual energy production by optimizing the airfoil characteristics in addition to the blade chord and twist has been found marginal compared to a case where a standard NACA 634x airfoil family is used. The optimal ratio of swept area to rated power is found depending strongly on the value of the specified maximum loads. Optimization of rotors to specific wind regimes has not been found favorable. In general, the results show that the optimization algorithm is an useful aid to the design.
- OSTI ID:
- 93004
- Report Number(s):
- CONF-950116-; ISBN 0-7918-1294-4; TRN: IM9537%%47
- Resource Relation:
- Conference: 1995 American Society of Mechanical Engineers (ASME) energy sources technology conference and exhibition, Houston, TX (United States), 29 Jan - 1 Feb 1995; Other Information: PBD: 1995; Related Information: Is Part Of Wind energy 1995. SED-Volume 16; Musial, W.D.; Hock, S.M. [eds.] [National Renewable Energy Lab, Golden, CO (United States)]; Berg, D.E. [ed.] [Sandia National Labs., Albuquerque, NM (United States)]; PB: 298 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Peak power and blade loads on stall-regulated rotors as influenced by different airfoil families
An evaluation of an empirical model for stall delay due to rotation for HAWTS