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A novel wake energy reuse method to optimize the layout for Savonius-type vertical axis wind turbines.
- Source :
-
Energy . Feb2017, Vol. 121, p341-355. 15p. - Publication Year :
- 2017
-
Abstract
- The long wake of a wind turbine has a significant impact on the performance of downstream turbines. Under the inspiration of migrating geese flying in a V or I formation to save energy, a novel wake energy reuse method is proposed to optimize the layout for Savonius-type vertical axis wind turbines (S-VAWT). VAWT wakes include a series of high speed and energy zones. On both sides of the upstream turbine, 7 × 16 transient two-dimensional numerical simulations are performed with Fluent to investigate wake structure, interaction effect and power coefficients ( C p ) of downstream turbines. Based on Kriging Method, a response surface model (Surrogate model) is created to describe the relationship between the optimization objective C p and layout positions. Finally, particle swarm optimization algorithm is applied to find the optimal relative layout position (5.25 m, −2.18 m) of the downstream turbine. The optimal position is located in the periodic high speed zone of the wake on the advancing blade side. And the optimal position is suitable for multi-turbines in a large wind farm. The optimization results show that C p of downstream turbines at optimal layout position is significantly increased from 0.2477 to 0.3044 (22.89% higher). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03605442
- Volume :
- 121
- Database :
- Academic Search Index
- Journal :
- Energy
- Publication Type :
- Academic Journal
- Accession number :
- 121454286
- Full Text :
- https://doi.org/10.1016/j.energy.2017.01.004