Abstract
We develop a model and prototype for a lightweight roof oculus structure, which integrates two complementing cooling strategies. During the day the roof oculus takes the shape of a downdraft evaporative cooling chimney. A water mist sprays inside the chimney crown, cooling and densifying hot dry air and causing it to fall down the chimney into the indoor space by free convection. During the night, the oculus structure is opened by geometric dilation designed with actuation kinetics to expose a maximum surface of the concrete slab below to the night sky above. The slab then acts as thermal mass, "storing" coolness for the following hot day. The results of the analytical model demonstrate the ability to cool a space in 40°C desert climate to comfort conditions. A scaled prototype was built and demonstrates the operation to evaporative cooling and the structural opening for expanded radiant view factor.
Original language | English (US) |
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Pages (from-to) | 1123-1128 |
Number of pages | 6 |
Journal | Energy Procedia |
Volume | 122 |
DOIs | |
State | Published - 2017 |
Event | International Conference on Future Buildings and Districts - Energy Efficiency from Nano to Urban Scale, CISBAT 2017 - Lausanne, Switzerland Duration: Sep 6 2017 → Sep 8 2017 |
All Science Journal Classification (ASJC) codes
- General Energy
Keywords
- Evaporative Cooling
- Kinetic Architecture
- Radiative Cooling