Analysis of the green roof thermal properties and investigation of its energy performance

The advantages of the planned roofs are undoubtedly numerous from both the ecological and the social point of view. They act positively upon the clima te of the city and its region, as well as upon the interior climate of the buildings beneath them. They give protection from the solar radiation, whic h is the main factor in passive cooling. By reducing thermal fluctuation on the outer surface of the roof and by increasing their thermal capacity, th ey contribute, to the cooling of the spaces below the roof during the summe r and to the increase of their heat during the winter. Due to the decrease of the thermal losses, the green roofs save the energy consumption. This paper refers to the analysis of the thermal properties and energy perf ormance study of the green roof. The investigation were implemented in two phases: during the first phase, extended surface and air temperature measur ements were taken at the indoor and outdoor environment of the buildings wh ere the green roof had installed and during the second phase of the study, the thermal properties of the green roof, as well as, the energy saving wer e examined. through a mathematical approach. (C) 2001 Elsevier Science B.V. All rights reserved.