WHI Patents

Coupled Vortex Vertical Axis Wind Turbine

6784566, Robert N. Thomas, 25 January 2002

A pair of vertical axis wind turbines are arranged in close proximity to each other so that their vortices interact with each other to provide enhanced aerodynamic efficiency. The wind turbines are spaced as closely as possible while providing for machine and personnel safety. Adjacent wind turbines rotate in opposite directions to enhance the coupled vortex effect. The vertical axis wind turbines may be located underneath a row of horizontal axis turbines in a "bush-tree" configuration to provide greater energy extraction from a parcel of land. The vertical axis turbine includes a simple...

Vertical Windmill With Omnidirectional Diffusion 

5332925A, Robert N. Thomas, 28 July 1994

 

A vertical windmill employing aerodynamic lift includes stators that form an omnidirectional diffuser and can rotate out of the wind to reduce the destructive tendencies in high winds. A braking mechanism included in the windmill uses rotation of the airfoils to reduce the lift caused by the wind and disengagement of the airfoils to reduce nearly all lift on the airfoils. Centrifugal force is used to activate the brake in high winds, both to slow the rotor speed and, in extreme winds, to stop the rotor. A motor is provided to drive the windmill to simplify controls and increase energy...

.

Vertical and Geographic Placements of Arrays of Vertical Axis Wind Turbines (not available to the public)

Provisional Application Serial Number 62/243,373, Kevin J. Wolf and Robert N. Thomas

 

“[0002]  Example embodiments of processes, apparatuses and systems for placing vertical axis wind turbines within wind farms and/or around horizontal axis wind turbines are discussed. As a non-provisional patent, this patent is not publically available until spring of 2018. At that point, WHI and the patent office will publish the full text and drawings. Until then WHI has chosen to only share a couple of the drawings and the description in the Patent section under Technology.

Vertical Windmill

4115027, Robert N. Thomas, 19 September 1978

 

A vertical windmill employing aerodynamic lift includes stators that form an omnidirectional diffuser and can rotate out of the wind to reduce the destructive tendencies in high winds. A braking mechanism included in the windmill uses rotation of the airfoils to reduce the lift caused by the wind and disengagement of the airfoils to reduce nearly all lift on the airfoils. Centrifugal force is used to activate the brake in high winds, both to slow the rotor speed and, in extreme winds, to stop the rotor. A motor is provided to drive the windmill to simplify controls and increase energy...

.

Vertical and Geographical Placements of Arrays of Vertical-Axis Wind-Turbines (VAWTs)

20170107975, Robert N. Thomas and Kevin J. Wolf, 20 April 2017

 

This patent covers ways in which tightly spaced VAWTs in arrays can increase vertical mixing and enhance near-ground wind speeds. The patent also covers the porous wind fence effect where different shapes and heights of rows of VAWTs placed directly under or behind a HAWT can speed up the wind through the HAWT rotor by acting as a porous wind fence. In such a fence, some of the wind is blocked, in this case by the VAWT blades. As a result the wind moves faster over, around, under and through the gaps in the wall of VAWT rotors.[6] The tighter the gaps between the rotors and the higher the “solidity”[7] of the VAWTs, the faster the wind moves around the denser (less porous) “fence” of VAWTs.

WordPress Theme built by Shufflehound. © Wind Harvest International 2016. All rights reserved.