The Coupled Vortex Effect: Wind Harvest's Early Breakthrough for More Efficient Wind Turbines

An early breakthrough of the original Wind Harvest Company (now Wind Harvest International) was the discovery of the Coupled Vortex Effect, which can boost the efficiency of vertical axis wind turbines (VAWTs). Inspired by his recurring dream of a star, co-founder Bob Thomas designed the Windstar turbine. His observations of the Windstar in operation led him to the Coupled Vortex Effect. With this effect, synergy between closely spaced vertical axis turbines increases the energy output of each turbine in the pair. The Coupled Vortex Effect can even be used to increase the efficiency of horizontal axis wind turbines (HAWTs) by strategically placing smaller VAWTs below them. The coupled vortices produced by the smaller turbines draws faster moving air down through the rotors of the taller turbines, increasing their energy output by as much as 10%.
Read more about the Coupled Vortex Effect: bit.ly/3SemihP
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[@windharvest2341]

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[@Xingqiwu387]

It's really too bad that engineers have not been able to come up with affordable wind turbines for home use that can really exploit the wind to the fullest. Many of us who live in coastal areas with constant winds see the potential, but also understand that NOTHING currently on the market is really viable. The devices either cost so much that they payoff wouldn't come for 50 years, or they generate just enough electricity to power a table lamp. Solar and biogas are clearly the only viable options.

[@windharvest2341]

There are two problems with wind energy for residential applications. The biggest is that people don't like to live in truly windy areas. The energy in the wind is the cube of the wind speed. Wind speeds should average above 6m/s to be profitable. If energy prices are high enough wind speeds average as low as 5.5 m/s might work. Here is what Wind Harvesters will produce per MW
5 m/s 957 kWh per MW
5.5 m/s 1,743 kWh per MW
6 m/s 2,157 kWh per MW
6.5 m/s 2,586 kWh per MW
7 m/s 3,000kWh per MW
The second problem is in the cost per kW for installation is much higher in small projects (like homes) than in large multi-turbine projects.
Kevin