Abstract

OSUNA-MOTTA, Iván; HERRERA-CACERES, Carlos  and  LOPEZ-BERNAL, Oswaldo. Green roofs as a passive cooling device in the tropics. Rev. Arquit. [online]. 2017, vol.19, n.1, pp.42-55. ISSN 1657-0308.  https://doi.org/10.14718/revarq.2017.19.1.1109.

The study aims to determine the thermal performance of an experimental green-roof prototype that can be installed on pitched roofs of fiber cement corrugated sheets, widely used in our environment. Research results showed the advantages of using green roofs as a passive cooling device in the specific climate and weather conditions of a place such as Cali, Colombia, where roofs are the greatest source of heat gain. During the experimental phase, a control module and two test modules were built, where the green-roof prototypes were installed; surface temperature of the envelope and temperature and relative humidity of indoor and outdoor air were periodically recorded. Using a comparative method, it was possible to establish and quantify the positive effect of the prototype on the thermal performance of the envelope in local conditions, demonstrating its usefulness.

Keywords : Green roofs; heat transfer; passive cooling; sustainability; thermal comfort.

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