The Liam F1 Urban Wind Turbine: Archimedes Spiral Geometry, Aerodynamic Performance, and Applications in Urban Renewable Energy Systems

The Liam F1 Urban Wind Turbine (UWT), developed by The Archimedes (Rotterdam, Netherlands), represents a paradigmatic advancement in small-scale distributed wind energy technology. Drawing inspiration from the Archimedean screw and the logarithmic geometry of the nautilus shell, the turbine features a three-blade conical–helical rotor capable of self-aligning with multi-directional and turbulent wind flows characteristic of urban environments. This paper presents a comprehensive technical review of the Liam F1 UWT, encompassing its geometric and aerodynamic design principles, performance metrics (including power coefficient Cₚ, acoustic emissions, and annual energy yield), a comparative analysis with conventional small horizontal-axis and vertical-axis wind turbines, computational fluid dynamics (CFD) findings from the scientific literature, and an assessment of installation scenarios, economic viability, and hybrid photovoltaic integration. Special attention is given to the turbine’s dual lift–drag energy conversion mechanism and its theoretical relationship to the Betz limit. Results from independent studies indicate a maximum power coefficient (Cₚ) of approximately 0.293, corresponding to an annual energy production of roughly 1,500 kWh at a mean wind speed of 5 m/s. The paper further discusses ongoing research into aerodynamic optimization, including blade surface modifications, winglet geometries, and shroud/concentrator configurations. Collectively, these findings affirm the Liam F1 UWT as a viable and efficient component within urban building-integrated renewable energy systems.