Thermal performance of an extensive green roof under semi-arid conditions in central Argentina

IMHOF, LELIA; SUÁREZ, EDGARDO; CÁCERES, NATALIA; ROBBIATI, FEDERICO; CÁCERES, C; BROILO, A; PELLIZARI L; SUÁREZ, MARIO; HICK, EMMANUEL C; MATOFF, EVANGELINA E; GALETTO, LEONARDO

Journal of Green Building

College Publishing

Lugar: Glen Allen; Año: 2021

Extensive green roofs improve the provision of ecosystem services in urban environments,particularly in semiarid regions. The aim of this paper is to compare the thermal performance duringsix months between two rooms, one with a green roof and the other with a conventional roof, inCórdoba (Argentina). The room with green (planting) roof showed lower inside surface temperaturesince the beginning of the essay than the control room (between 5-6°C of difference). During selectedperiod the indicators such as temperature amplitude (the difference between the maximum and theaverage temperature) and the anti-interference characteristics of the layers to the outdoor airtemperature are evidencing a better performance for the green roof compared to the conventionalroof. The pattern of a better performance was consistent across the essay for the green roof,characterized by a higher cooling and warming of the roof surface during the day and night,respectively. Green roof was more effective blocking upward heat flux during daytime andsuppressing heat loss during the night. Evaporation, conductive flux and climatic conditions seem todominate the thermal performance of green roofs in areas with semiarid climate conditions.