Wind energy is a key component of the mix of renewables that many countries are adopting to free themselves from fossil fuels. But to achieve maximum performance, wind turbines have become increasingly larger, forcing large-scale installations far from urban centers. This is why there are several startups studying more compact wind technologies. I told you about Aeromines, and above all Italian Airon, both interesting.
Now comes a solution that I find quite interesting: it's called Wind Fence. It is a modular enclosure system of mini vertical propeller turbines. It is the result of two years of research and wind tunnel tests with the aim of combining efficiency, silence and aesthetics to encourage the widespread adoption of wind energy even in urban contexts.
The problem of urban wind power
Let's start with a fact: Wind power is a rapidly growing sector globally, with installed power exceeding 743 GW in 2021. But the vast majority of these plants are located in rural or offshore areas, far from consumption centers. The reason? It's simple: to maximize efficiency, wind turbines have become increasingly larger, with blades that can exceed 100 meters in length. Dimensions frankly incompatible with limited spaces and the urban landscape.
How then can we bring wind energy to the city too, bringing it closer to the places of use and reducing transmission losses? The answer, according to the New Yorker Joe doucet, it's in the vertical wind turbines (VAWT): more compact, less invasive and suitable for exploiting the multidirectional winds typical of urban environments. But the VAWTs proposed so far they suffered from efficiency, noise and visual impact limits which slowed down their diffusion. That's why Doucet decided to roll up his sleeves and find a solution.
Form, function and integration
The first step was to identify the optimal shape for the mini turbine blades. After testing 16 different configurations in the wind tunnel, Doucet and his team concluded that the helical structure was the most efficient. A result which is not new in itself, but which Airiva (the startup co-founded by Doucet with the energy expert Jeff Stone) has been able to optimize by finding a way to arrange multiple helical blades to obtain maximum performance.
The second key aspect was architectural and landscape integration. Instead of proposing single isolated turbines, Doucet imagined real modular enclosures made up of multiple units placed side by side. A solution that allows you to increase the installed power without sacrificing the aesthetics and functionality of the "fence" element. With its minimal lines and the silent movement of the propellers, the Wind Fence presents itself as urban furniture capable of producing energy without defacing the surrounding environment.
Wind fences: performance and prospects
And here comes the classic one-hundred-gun question: how much energy can Wind Fence fences actually generate? According to data released by Airiva, a single unit with eight optimally arranged helical blades can reach 2.200 kWh per year. A significant value. Of course, not enough to cover the needs of an average house, which would require at least five units, but capable of participating very well in the energy mix.
In any case, I don't see Wind Fence as suitable for the residential market as much as for the commercial and institutional one. With larger surfaces to "barricade" the benefits would be more significant, using (says the company) up to 80% recycled materials.
The first orders are expected next year: extra time that Airiva plans to use to further optimize design and materials.
Will we really see these wind fences around in the future?
Beyond the technical and commercial specifications, Wind Fence has the merit of opening a glimpse into a future in which wind energy will no longer be confined to remote rural areas or offshore platforms, but will become an integral part of the urban landscape. A future in which cities will not only be centers of consumption, but also of widespread production of clean and renewable energy.
Somehow, I see from the multiplication of these attempts, a new wind will blow even among the skyscrapers of our cities. We just have to decide how we want to harvest it.
