A super cool roof solution to being hot in the city
A research team from the University of Technology in Sydney, Australia is claiming a first in super cool roof technology with a surface that stays cooler than the ambient air temperature even under full summer sun.
The test roof was placed above busy Harris St on top of the UTS Faculty of Science building with a clear view of the sky and no shadowing.
Data was collected for an unprotected new surface and one aged over several days in a polluted outdoor summer environment for assessment of the impact of the build-up of dust and grime.
Professor Smith said the surface maintained its high performance in all conditions. "Extensive dew formation is inevitable for a super cool roof and dew drops precipitate dirt. This roof site being 25 metres above a busy city transit road was a stern test. Results show that excellent thermal performance can be maintained.
"Much of the world’s population lives in warm climates. Keeping a roof cool saves energy and makes building interiors comfortable in summer. If enough roofs in a precinct are kept cool then the local climate can also be beneficially influenced," he said.
The work has been supported by an Australian Research Council Discovery Project grant.
The paper, "A Sub-ambient Open Roof Surface Under the Mid-summer Sun", is available from Advanced Science online as an open access article.
Originally published in the UTS Newsroom.