Effects of green roofs and vertical greenery systems on building thermal comfort in dry climates: an experimental study

This article discusses in detail the effectiveness of using the green walls and roofs on the internal thermal comfort to reduce the building’s temperature in the desert regions like Ouargla in Algeria, using a model room and experiments in the summer. The investigation is based on a measurement campaign carried out every half hour. Several physical parameters have been treated, such as air and surface temperatures, and air humidity. The effect of vegetation on the hygro-thermal environment of buildings was studied by comparing the performance and quality between five rooms “a, b, c, d, and e. The results showed that the use of vegetation on the walls for rooms “a, c,” also the wall/roof of room “e,” decreases the temperature of the air by evapotranspiration of water. In addition, the vegetation reduces the surface temperature by the shade it provides, with a temperature difference between the three rooms. The lowest value of air temperature reduction is 2.8 ℃ in room “e”.