Scientific Papers

INVELOX with multiple wind turbine generator systems

15 December 2015, Pages 1030–1040
Dr.Daryoush Allaei, SheerWind
Professor Yiannis Andreopoulos, City College of New York
David Tarnowski,  QRDC

HIGHLIGHTS

• Performance of multi stage wind turbines installed in a new wind energy harnessing concept is described.
• Two and three turbines have been considered.
• We carried out field measurements in a prototype.
• Higher power output has been measured in comparison to single wind turbine.
• There is interference among the wind turbines affecting output.

Abstract

INVELOX is a wind delivery system suitable for wind power harnessing. One of its innovative features is its capability of incorporating multiple wind turbine generator systems in the Venturi section. INVELOX captures wind flow through an omnidirectional intake or multi-unidirectional intakes and thereby there is no need for a passive or active yaw control to orient the wind turbine. It accelerates the flow within the Venturi section which is subsequently expanded and released into the ambient environment through a diffuser. This allows for harnessing wind power at multi stages. When two or three turbines are in the Venturi section, the second and third turbine harness the wind power that otherwise cannot be harnessed by the first turbine due to its power conversion limitations. The objective of the present work is to report on measured performance of the system when single, double and triple turbines are placed in the Venturi section. The results show that it is possible to harness wind power using multi-stage turbine configurations and therefore increase the total harnessed power of the system.

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INVELOX: Description of a new concept
in wind power and its performance evaluation

Energy
Volume 69, 1 May 2014, Pages 336–344
Dr.Daryoush Allaei, SheerWind, Inc.
Professor Yiannis Andreopoulos
City College of New York

HIGHLIGHTS

• A new wind energy harnessing concept is described.
• We model the flow by using computational fluid dynamics for turbulent flows.
• We carried out field measurements in a prototype.
• Results indicate very little sensitivity to wind direction.
• Higher power output has been measured in comparison to conventional wind turbines

ABSTRACT

A new concept in wind power harnessing is described 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 reduced cost. Its first innovative feature is the elimination of tower-mounted turbines. These large, mechanically complex turbines, and the enormous towers used to hoist them into the sky, are the hallmark of today’s wind power industry. They are also expensive, unwieldy, inefficient, and hazardous to people and wildlife. The second innovative feature of INVELOX is that it captures wind flow through an omnidirectional intake and thereby there is no need for a passive or active yaw control. Third, it accelerates the flow within a shrouded Venturi section which is subsequently expanded and released into the ambient environment through a diffuser. In addition, INVELOX provides solutions to all the major problems that have so far undermined the wind industry, such as low turbine reliability, intermittency issues and adverse environmental and radar impact. Simulating the performance of this wind delivery system is quite 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 involved cases with different incoming wind directions and changes in the intake geometry. The results show that it is possible to capture, accelerate and concentrate the wind. Increased wind velocities result in significant improvement in the power output. These results led to the design of a demonstration facility which has provided actual data which verified the significantly increased power expectations.  VIEW PAPER

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Published:

Energy

The International Journal

Energy is an international, multi-disciplinary journal in energy engineering and research. The journal aims to be a leading peer-reviewed platform and an authoritative source of information for analyses…

Editor-in-Chief: H. Lund
View full editorial board

INVELOX: A NEW CONCEPT IN WIND ENERGY HARVESTING

Dr.Daryoush Allaei       Professor Yiannis Andreopoulos
SheerWind, Inc.            City College of New York
ABSTRACT
The results of multi physics simulations involving Computational Fluid Dynamics, used to evaluate a highly acclaimed innovative wind power generation system known as INVELOX, are presented. This patented technology significantly outperforms traditional wind turbines and it delivers superior power output, at reduced cost. Furthermore, INVELOX solves all the major issues, such as low turbine reliability, intermittency issues and adverse environmental and radar impact that have so far undermined the wind industry.  VIEW PAPER

 

Presented:
ASME 2013 7th International Conference on Energy Sustainability
& 11th ASME Fuel Cell Science, Engineering and Technology Conference

ES FuelCell2013
July, 2013   Minneapolis, MN, USA