Light and Thermal Management by the Kirigami-Based Dynamic Shading Envelopes

Conventional heating, ventilation, and air conditioning (HVAC) systems in buildings not only consume substantial energy but increase the heat-trapping gases in the atmosphere, which further aggravates global warming. To improve building energy efficiency and thus reduce negative environmental impacts, we investigate kirigami structures as adaptive building envelopes as a promising alternative to manage building heating and cooling. Numerical simulations are performed to study the mechanisms of light and thermal modulation by the kirigami-based dynamic envelopes by taking into consideration of building locations and occupants needs. We then design outdoor test chambers with thermo- and lux- sensors installed outdoor to demonstrate the effect of kirigami structures with variable cut dimensions on light modulation and temperature inside of chambers. By comparing experimental results and simulation, we gain insights to optimize indoor light and heat management by fine-tuning kirigami designs.