VAWTs Can Double the Output of Wind Farms Using Existing Infrastructure

Wind Harvest International (WHI) believes Vertical Axis Wind Turbines (VAWTs) are powerful tools that will help convert our world to renewable energy and reverse the buildup of greenhouse gases in our atmosphere.  The new WHI VAWT Model G168 will be the key to achieving our goal of stimulating the development of 100,000 MWs of this new energy source by 2030.  Our placement patents will allow VAWTs to be installed under and around traditional Horizontal Axis Wind Turbines (HAWTs) so as to increase their energy output while making use of the same roads and infrastructure on the windiest land available.

VAWTs, with our Model G168 in the lead, will soon enter the world market for wind turbines. Here's why:

  • Advances in Technology. The aeroelastic modeling needed to properly engineer VAWTs has been validated with field data. WHI has used this computer modeling capability and validating data from its prototypes to design its soon-to-be-certified Model G168 to have the same fatigue life as HAWTs.
  • Physics Favors VAWTs. We know how the placement of VAWTs in the “coupled vortex” position increases their efficiencies (Cp max) to the levels of HAWTs. VAWTs generate more power the closer they are placed to one another, unlike HAWTs that require large empty spaces between turbines. This power enhancement for VAWTs is featured in WHI's patented coupled vortex effect.
  • Smarter Wind Energy: Use the Best Land Better. Field research and modeling has begun that will allow VAWTs to be safely placed around HAWTs and in positions that will increase the energy output of these existing turbines.
  • Wildlife Friendly. Many wildlife experts hypothesize that both birds and bats will detect and avoid three-dimensional VAWTs better than they do two-dimensional HAWTs. If not, motion detection and avoidance technologies can be installed.

Because VAWTs can make double use of land, are less expensive to transport, install and maintain, and because their efficiencies can be as high as traditional turbines, they will become a major factor in the wind industry's future growth.  And just in time to help double the world's wind energy.

The founding of the Wind Harvest Company in 1976 is an interesting story that you can read in the About Us - History section. On the left in this photo is Sam Francis, internationally renowned painter. George Wagner, the attorney and environmental activist, is in the middle. Smiling on the right is Bob Thomas, aeronautical engineer and inventor. The year is 1985.  The location is the Windstar 480 VAWT project site in Concord, Calif.

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