Potential Order-Of-Magnitude Enhancement of Wind Farm Power Density Via Counter-Rotating Vertical-Axis Wind Turbine Arrays

Coupled Vortex Effect, Synergy with Tall and Short Turbines

Author: John DabiriPublication: J. Renewable and Sustainable EnergyYear Published: 2011 Modern wind farms comprised of horizontal-axis wind turbines (HAWTs) require significant land resources to separate each wind turbine from the adjacent turbine wakes. This aerodynamic constraint limits the amount of power that can be extracted from a given wind farm footprint. The resulting inefficiency of…

Wind tunnel experiments of a pair of interacting vertical-axis wind

Coupled Vortex Effect, Synergy with Tall and Short Turbines

Author: A Vergaerde, Tim de Troyer, Joanna Kluczewska-Bordier, Nicolas Parneix, Frederic Silvert and MC RunacresPublication: J. Physics: Conference SeriesYear Published: 2018 Vertical-axis wind turbines (VAWTs) have received a renewed interest in the wind energy research community, mainly for off-shore applications. One advantage is that installing a pair of counter rotating VAWTs on the same floating…

Modeling Blade Pitch and Solidities in Straight Bladed VAWTs – Final Report from IOPARA Inc. to Wind Harvest

Coupled Vortex Effect, Synergy with Tall and Short Turbines

Author: IOPARA Inc.Publication: Wind Harvest InternationalYear Published: 2012 This report is a compilation of the aerodynamic analyses carried out by IOPARA Inc. as part of a contract project called “Modeling Blade Pitch and Solidities in Straight Bladed VAWTs,” realized under the request of Wind Harvest International Inc.

Experimental Validation of Pharwen Code Using Data from VAWT Wind Tunnel Tests with Imposed Motions

Coupled Vortex Effect, Synergy with Tall and Short Turbines

Author: Marianne Dupont, Pitance Denis, Joanna Kluczewska-Bordier, Alexandre Immas, Paul DeglairePublication: WindEurope Conference, At AmsterdamYear Published: 2017 NENUPHAR, in collaboration with IRT Jules Verne and ECN (Ecole Centrale de Nantes) has performed extensive testing in a large wind tunnel (CSTB, Nantes) of a scaled-model of a two-bladed VAWT in the frame of the “MOQUA” project.…

Efficiency Improvement of Vertical-Axis Wind Turbines with Counter-Rotating Lay-Out

Coupled Vortex Effect, Synergy with Tall and Short Turbines

Author: Nicolas Parneix, Rosalie Fuchs, Alexandre Immas, Frederic Silvert, Paul DeglairePublication: EWEAYear Published: 2016 Improving the performance of Vertical Axis Wind Turbines (VAWTs) is key to make VAWTs commercially successful. Scientists have investigated several interesting concepts for that purpose: increasing the swept area, especially to limit the losses due to 3D effects, or using flap…

Data Analysis from Experimental Measurements on a Vertical Axis Wind Turbine

Coupled Vortex Effect, Synergy with Tall and Short Turbines

Author: Raphael ConeuPublication: KTHYear Published: 2017 This thesis presents the analysis of the data measured during the test campaign of a vertical axis wind turbine prototype developed by the company Nenuphar Wind in France. Three studies are presented: the study of the loads measured during the test campaign, the study of the vibrations, and the…

CFD Analysis of Vertical Axis Wind Turbines in Close Proximity

Coupled Vortex Effect, Synergy with Tall and Short Turbines

Author: Marius Paraschivoiu, Chad X. Zhang, Selvanayagam Jeyatharsan, Norbert V. Dy, Farooq Saeed, Robert N. Thomas, Ion ParaschivoiuPublication: IOPARA, Inc.Year Published: 2011 This paper presents an analysis based on computational fluid dynamics of vertical axis wind turbines when placed in close proximity in a linear array. It has been noticed that VAWTs placed close to…

Aerodynamically Interacting Vertical-Axis Wind Turbines: Performance Enhancement and Three-Dimensional Flow

Coupled Vortex Effect, Synergy with Tall and Short Turbines

Author: Ian Brownstein, Nathaniel Wei and John DabiriPublication: EnergiesYear Published: 2019 This study examined three-dimensional, volumetric mean velocity fields and corresponding performance measurements for an isolated vertical-axis wind turbine (VAWT) and for co- and counter-rotating pairs of VAWTs with varying incident wind direction and turbine spacings. The purpose was to identify turbine configurations and flow…