22/01/2025
https://www.facebook.com/share/12CNauRsqKR/?mibextid=wwXIfr
Researchers from Germany’s universities of Stuttgart and Freiburg have drawn inspiration from the humble pine cone to develop the Solar Gate window facade system, a self-shading setup that uses no electricity. Similar to how pine cones open in hot, dry conditions and close in damp weather, these 4D-printed window elements respond to changing moisture levels in the air.
Each element is constructed with three layered filaments—cellulose-based strands that expand when wet, thermoplastic fibers that keep the structure in line, and a diagonal mesh for stability. When the air is moist, the elements curl upward, allowing more sunlight to pass through; in drier conditions, they flatten to reduce heat and glare. Tested for over a year in a south-facing skylight, the system consistently regulated indoor temperatures, showcasing a nature-inspired, energy-free solution for modern building design.
