Microclimatic Effects of Green Facades in Urban Environment

Abstract:

The processes of the last decades’ – such as climate change, growth of cities, and the decreasing of urban green spaces – increase the risk of overheating during the summer. The significance of vegetable shading is, that through evapotranspiration it can minimise the risk of overheating and the negative effects of urban heat island. Although there are some previous data about the effect of vegetation, there are still questions in the scope of the microclimatic and energetic effect of vegetation planted in front of the façades. The effectiveness of urban vegetation varies on a large scale depending on environmental conditions. For example the effect of street tree lines on wind speed changes in relation with the angle of the axis of the street and the prevailing wind direction. The mentioned dilemma is a major issue of planning urban ventilation. That is why more precise calculations are needed to be able to use urban vegetation properly and most effectively. Scientific research should provide a background for quantifying the effect of urban vegetation so that designers could be helped to use more confidentially the vegetation as an important “building element” in the build-up environment. In order to facilitate vegetable shading the paper presents an attempt for the quantitative evaluation of green facades.

• Periodical: Advanced Materials Research (Volume 899)
• Pages: 415-420
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.899.415
• Online since: February 2014
• Authors: Flóra Szkordilisz*
• Keywords: Energetic Effects of Vegetation, Mitigation of Urban Heat Island by Plantation of Green Areas, Urban Microclimate

References

[1] Meyer, F. H.,: Bäume in der Stadt, Verlag Eugen Ulmer, Stuttgart, (1978).

[2] http: /www. greenscreen. com/Resources/download_it/IntroductionGreenWalls. pdf; 10. 12. (2013).

[3] Taha, H.: Urban Climates and Heat Islands: Albedo, Evapotranspiration and Anthropogenis Heat, in: Energy and Buildings, 1997, Vol. 25. pp.93-103.

DOI: 10.1016/s0378-7788(96)00999-1

[4] James R. Simpson: Improved estimates of tree-shade effects on residential energy use, Energy and Buildings, 2002, Vol. 34, pp.1067-1076.

DOI: 10.1016/s0378-7788(02)00028-2

[5] DeWalle, D.R., and Heisler, G., Windbreak effects on air infiltration and space heating a mobile house, Energy and Buildings, 1983, Vol. 5, pp.279-288.

DOI: 10.1016/0378-7788(83)90015-4

[6] M. Santamouris: The Role of green spaces, in: M. Santamouris: Energy and Climate in the Urban Built Environment, James & James Ltd, London, 2001, p.148.

[7] Dr. Kinga Szilágyi and Dr. Imre Jámbor: A fenntartható városfejlődés környezeti kérdései. A fenntartható városfejlesztés szempontjainak érvényesítése a speciális rehabilitációs szabályozást igénylő fővárosi területeken., 1995. Research report, KTM, Budapest.