Gallery: Venger Wind Unveils World’s Largest Rooftop Wind Farm in Oklah...


Venger Wind and US renewable distributor SWG Energy just installed the world’s largest rooftop wind farm atop the Oklahoma Medical Research Foundation (OMRF) in Oklahoma City. The project saw Venger Wind construct 18 V2 vertical axis wind turbines on the medical center’s roof as part of OMRF’s sustainability strategy to create a zero emissions research tower.

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  1. G.Mamulashvili September 16, 2012 at 1:59 pm

    V2 turbines are based on the work of Finnish engineer Sigurd Johannes Savonius. Where you will find the text or drawings of the invention of the Finnish inventor Savinius you will see only two vertical plane as the volume buckets rotating in a horizontal wind flow. Savonius says: “The rotor cannot turn faster than the wind”. The Sovinius Turbine perceives only the horizontal wind flow and all. And ideally applied here just turbine V2 rotates faster than the wind … horizontal. Why did they do all of the vortex turbine again called Sovinius’s turbines? To hide the truth or what? But this is not the Sovinius’s turbine because they just spin faster current wind speed, since in addition to the horizontal wind flows are perceived and updrafts, which are patented as once in my invention for example SU 1319654. Certainly convenient to call each new technology named inventor who has died long ago and like Sovinius or Tesla. This is done essentially saying shifty businessmen who do not want to pay the true inventor deserved reward. All over the internet in all the important sites and some articles mention my invention with a vortex turbine. This is exactly the vortex turbine Georgian Mamulashvili, not Finn Sovinius where just used simultaneously with horizontal vertical updrafts and this is called a vortex Mamulashvili and do not be surprised that the turbines begin operation at wind speeds of about 2 meters per second, which is much below that threshold where I start to work simple turbine blade, see for example:ée)…/passive-sola…ependence.html…olaire.php…/c_08_10_w…uwerk.htm

  2. August 22, 2012 at 12:56 pm

    Here here… Mike Barnard,

    Modern high-rise buildings consume 76% of all electricity from the power Grid. If we are going to deal with global warming and energy efficiency we need to start with our buildings. Any innovation to create building integrated wind and PV needs to be lauded and encouraged while critically reviewed for its return on investment.

    The Oklahoma Medical Research Foundation is the largest building-integrated wind farm in the world. As the renewable energy designer for the building I can assure you that it also has provisions for PV on the top of the building’s “shrouds” which act to channel and accelerate the mass flow of turbulent wind through the building’s roof. This is part of the design strategy of this demonstration project showing that any building can become a giant solar and wind collector. Ultimately the quest is to build and retrofit net-zero energy buildings where all energy consumed will be produced on site! We must start with energy conservation through the creation of nega-watts.

    Our design decisions have to be functional as well as aesthetic. In this regard the wind turbines on the OMRF are what we consider to be an elegant solution… merging beauty with functionality.

    No one is suggesting that we should eliminate the wind farms in the countryside. What Mr. Morgan was referring to is the strategy, when possible, of Localization. We need to produce our energy as well as our food locally instead of from sources thousands of miles away. Energy integrated buildings are key to this new paradigm.

    For the record: any wind machine that makes electricity is a wind turbine. In the discussion of whether vertical or horizontal axis turbines are best…it has been shown that vertical axis rotors, while less efficient than horizontal axis rotors, do not have to track into the oncoming wind. This results in no precessional vibrations transferred into the building. This leads to greater power availability, especially in the urban environment where there is more turbulence. Finally, slow-speed, axial-flux alternators have eliminated the need for transmissions resulting in much lower noise and lifecycle cost.

    As we say in the renewable energy business, “More power to you.”

    Reinhold Ziegler,
    Solar and Wind Energy Design-Engineer
    Project OMRF

  3. mikebarnard August 18, 2012 at 11:15 am

    At this tiny scale of 4.5 KW wind generators, horizontal-axis triblade wind turbines do not require electricity to start. Modern wind turbines which generate 200 to 2000 times the electricity often draw energy from the grid due to the inertia of the blades. Small wind generators do not.

    Secondly, wind energy is distributed generation. It’s disingenuous of Mr. Morgan to assert that wind energy is installed a long way from population. Compared to the hundreds and thousands of kilometers that electricity is transmitted from dams, major coal plants and nuclear plants, most wind farms are very local to use. They are tied into the distribution grid, not the transmission grid, and their electricity is first used by local consumers, then by nearby consumers and then by remote consumers.

    Unfortunately, proponents of generally less cost-effective vertical-axis wind turbines often resort to attacking wind energy, possibly winning the battle, but helping anti-wind lobbyists win the larger war.

    And for the record, these designs are not wind turbines, but a modern variant of a Savonius windmill. There are small niche areas where they have a slight advantage over horizontal axis wind turbines. This one, where the aesthetics are nicely integrated into the building is one, as the aesthetic value makes up for the much greater lifecycle cost of electricity that inefficient Savonius-designs invariably result in.

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