Inspiration from Pulmonary Architecture
This seminal project, developed by a team of our senior students and faculty, took its primary inspiration from the human lung's alveoli—the tiny, sac-like structures where gas exchange occurs. The design challenge was to create a large public atrium for a humid, polluted urban environment that could provide clean, conditioned air passively. The lung was chosen not for its shape, but for its process: an incredibly efficient, large-surface-area interface for filtering and conditioning air with minimal energy expenditure.
The Facade as an Active Membrane
The building's most striking feature is its facade, which operates as a dynamic, breathable membrane. Instead of a static wall of glass and steel, the facade comprises thousands of hexagonal 'alveolar units.' Each unit is a multi-layered composite structure:
- Outer Mesh Layer: Inspired by nasal hairs, this coarse filter captures large particulate matter.
- Hydrogel Core: A layer of moisture-absorbing hydrogel that regulates humidity, pulling moisture from humid air and releasing it when the air is dry.
- Catalytic Coating: A nano-scale photocatalytic coating (inspired by certain leaf surfaces) that breaks down volatile organic compounds (VOCs) when exposed to sunlight.
- Inner Directional Layer: A shape-memory polymer layer that opens and closes micro-vents in response to temperature and air pressure differentials, driving passive airflow.
System-Wide Integration and Performance
The alveolar units are not independent; they are connected via a network of internal air channels that mimic bronchi and bronchioles. Stale, warm air from the interior rises naturally through these channels, creating a stack effect that draws fresh air through the facade units. The conditioned air is then distributed evenly throughout the atrium space via a floor plenum system inspired by the capillary network in tissue. Data from the building's first two years of operation has been extraordinary. It has demonstrated a 67% reduction in energy used for air conditioning and filtration compared to a conventional building of the same size. Furthermore, indoor air quality metrics consistently show pollutant levels 90% lower than the surrounding outdoor air.
This project stands as a powerful testament to moving beyond form to process-based mimicry. It illustrates how a deep understanding of a biological system's functional principles can lead to an architectural solution that is not just sustainable, but actively restorative for its occupants' health and well-being, fundamentally redefining the relationship between a building and its atmosphere.