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Passive Variable Geometry

An energy conversion solution that allows efficient energy production by low-altitude (urban) blowing winds

November 2022
Gallery Passive Variable Geometry  1
Gallery Passive Variable Geometry  1


Until now, standard wind energy solutions have focused on the predictable behaviour of winds: the regular, laminar flow found only at high altitudes. However, winds can have much more varied behaviours. Windcity has developed, patented and produces a Passive Variable Geometry turbine, an energy conversion solution to allow efficient energy production by low-altitude blowing winds, enabling the utilisation of wind in urban areas for the benefit of society.

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Label Date November 14, 2022
From Italy
Maturity stage Prototype testing in the real world
Looking For New clients, Visibility, Funding, Partners

The environmental benefits

  • Urban wind applications have a great potential increase in energy harvesting: the turbulent wind power lost with conventional tech is fully recovered as a circular input by our solution, which offers up to a net +67% energy production.
  • Urban winds come in many short gusts of 3-5 minutes duration: conventional wind tech use this time to slowly speed-up before starting to produce
  • Being fast to speed-up and starting to produce during the short wind gust requires acceleration: in a turbulent average wind of 18 km/h our solution displays up to 8 times (800x) higher acceleration compared to standard wind tech..
  • Up to 100% of the urban wind today wasted can be recovered: this translates to +65% overall energy production in the urban environment
  • Up to 45% CO2 emission reduction in wind turbine production
  • Average 60% of the blade materials from recycled fibers

The Financial benefits

  • in an urban wind site, pay 0,108 €/kWh equivalent energy price, that is only a 30% of the average 2022 energy price
  • Save up to 40% of the wind energy installed costs: our rooftop installation uses the existing building as a wind tower

Activity Region

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  • Headquarters
  • Activity

Company Profile


Nature variability reduces renewable energy efficiency. The solution is always adapting to change: Windcity.

View company profile Solution website
Headquarters 38068 Autonomous Province of Trento, Italy

Networking Partner

Horizon Results Platform - European Commission

The Horizon Results Platform is a new European Commission platform helping EU Research & Innovation funding beneficiaries to valorise their results with a view to creating socio-economic impact.

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The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator Windcity has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.