SheerWind and City College of New York’s peer-reviewed paper has been released in Energy-The International Journal. The paper “Invelox: Description of a new concept in wind power and its performance evaluation” was co-authored by Dr. Daryoush Allaei, SheerWind and Professor Yiannis Andreopoulos, City College of New York.
Highlights from the paper include:
• A new wind energy harnessing concept is described.
• Models of the flow by using computational fluid dynamics for turbulent flows is presented.
• Field measurements in a prototype are shown.
• Results indicate very little sensitivity to wind direction.
• Greater power output has been measured in comparison to conventional wind turbines.
The paper describes a new concept in wind power harnessing, which significantly outperforms traditional wind turbines of the same diameter and aerodynamic characteristics under the same wind conditions and it delivers significantly higher output at a reduced cost.
- Elimination of tower-mounted turbines
- Captures wind flow through an omnidirectional intake; no need for a passive or active yaw control.
- Accelerates the flow within a shrouded Venturi section, which is subsequently expanded, and released into the ambient environment through a diffuser.
According to the paper, simulating the performance of this wind delivery system is challenging because of the complexity of the wind delivery system and its interaction with wind at the front end and with a turbine at the back end. The objectives of the present work are to model and understand the flow field inside the Invelox where the actual wind turbine is located as well the external flow field, which not only provides the intake flow, but also has to match the exhaust flow of the system.
The present computations cases with different incoming wind directions and changes in the intake geometry. The results discussed in the paper show that it is possible to capture, accelerate and concentrate the wind. These results led to the design of a demonstration facility, which has provided actual data, which verified the significantly increased power expectations. View the full paper here.
“It is gratifying to share our findings with the world in peer-reviewed publications such as Energy. Using commercially available generators and turbines with much smaller blades inside the Invelox systems is a win for those already in the wind industry,” says Allaei.
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