The effects of unsteady wind on the performances of a newly developed cross-axis wind turbine: A wind tunnel study
Document Type
Article
Publication Date
1-1-2019
Abstract
For the purpose of meeting the wind field in urban area, the performances of a newly invented cross-axis wind turbine (CAWT), which consists of the advantages of horizontal and vertical axis wind turbines (HAWTs and VAWTs), was examined in a calibrated open-circuit low speed wind tunnel. Firstly, to ensure the quality of the wind tunnel, the evaluations in accordance with the flow uniformity, turbulent intensity and pressure gradient along the test section were conducted within the wind tunnel, based on the IEC61400-12 standard. Furthermore, the CAWT was tested with and without the artificial turbulence generator for examining the static and dynamic performances within the steady/unsteady wind conditions at various Reynolds numbers, and the blockage inside the wind tunnel was additionally taken into account. The results showed that both the static and dynamic performances were improved with the addition of turbulence generator. Moreover, the payback period of the CAWT was calculated associated with its power performance.
Keywords
Wind energy, Wind tunnel experiment, Aerodynamic, Cross-axis wind turbine (CAWT), Vertical axis wind turbine (VAWT), Power coefficient
Divisions
fac_eng
Funders
Ministry of Science and Technology, Taiwan: the grant (National Energy Program-Phase II) 105-3113-E-006 -016 -CC2
Publication Title
Renewable Energy
Volume
131
Publisher
Elsevier