2021 Prototype Installation and Testing Awardee: XFlow Energy Company

Research output: NRELFact Sheet


XFlow Energy Company (XFlow Energy) aims to reduce the cost of wind energy by designing vertical-axis wind turbines (VAWTs), which have a cheaper blade manufacturing process and a mechanically simpler design than traditional wind turbines, among other cost-saving advantages. However, a lack of modeling or simulation tools that can predict the coupling between aerodynamic and structural forces poses a significant challenge to developers of VAWTs. Known as aeroelastic models, these are not just important design tools - they're critical for certifying VAWTs of 25 kilowatts (kW), which is the size of XFlow Energy's prototype wind turbine. Without certification, XFlow Energy will not be able to deliver an independently validated product to its customers, and those customers will not be eligible for state and federal incentives. An accurate aeroelastic model could provide less-conservative structural optimization tactics than are currently used, resulting in a wind turbine with lower capital costs.
Original languageAmerican English
Number of pages2
StatePublished - 2022

NREL Publication Number

  • NREL/FS-5000-84293


  • CIP
  • Competitiveness Improvement Project
  • distributed wind
  • midsized wind turbines
  • small wind
  • wind turbine certification
  • wind turbine innovation


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