(cest2017_00452)Indoor air quality and thermal comfort in a typical Mediterranean primary school with a green roof system

摘要

This paper presents experimental results from a typicalschool building in Athens equipped with a green roofsystem (GRS). The GRS covers 1/3 of the school's totalarea, while the rest is used for reference purposes.Environmental monitoring took place in six classroomslocated under the concrete reference roof and the greenroof sectors as well as in the immediate externalenvironment during warm and cold periods of the year.Measurements of CO2, VOCs, PM1, PM2.5, PM10,ambient temperature (T) and relative humidity (RH) wereperformed. Preliminary results highlight that duringsummer, the green roof reduces T in a classroom on the topfloor by about 2.8 0C while RH is increased by 5.9 %, incomparison with respective classrooms under concreteroof. Amid winter, a reverse behavior occurs.Concentrations of PM1, PM2.5, PM10, CO2 and VOCslevels were found to be elevated during class hours withaverage values of 0.85 μg m-3, 3.11 μg m-3, 22.68 μg m-3,589 ppm and 7.69 ppm respectively. The examination ofthe indoor/outdoor ratio of air pollutants, demonstrated thatthe outdoor meteorology affects only PM1 and PM2.5, asPM10 and VOCs are strongly affected by internal emittingsources and the activities of pupils.