Vlad Tudor DOBRA, Mugur Ciprian BĂLAN, Viorel MITRE


The purpose of this paper is to realize a comparative study between the temperature regimes of a green roof and a conventional roof. The experimental system used for monitoring both the classic roof and the green roof, includes 9 digital temperature sensors, a data acquisition board and a PC. The measurements were made between 1 and 14 July 2012. It was highlighted the thermal inertial effect of the green roof, by reducing the variation range and by inducing a phase shift of the inside air temperature variation and waterproof membrane temperature variation. It was also observed the cooling effect to the outside air above the green roof.

Keywords: green roof, air temperature, roof temperature, heat transfer, data acquisition system

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Oberndorfer, E., Lundholm, J., Bass, B., Coffman, R., Doshi, H., Dunnett, N., et al., Green roofs as urban ecosystems: ecological structures, functions, and services, Bioscience 57 (10), pp. 823–833, 2007

Dvorak, B., Volder, A., Green roof vegetation for North American ecoregions: A literature review, Landscape and Urban Planning 96, pp. 197–213, 2010

Berndtsson, J.C., Emilsson, T., Bengtsson, L., The influence of extensive vegetated roofs on runoff water quality, Science of the Total Environment 355, pp. 48– 63, 2006

Alexandri, E., Jones, P, Developing a one-dimensional heat and mass transfer algorithm for describing the effect of green roofs on the built environment: Comparison with experimental results, Building and Environment 42, pp. 2835–2849, 2007

Alexandri, E., Jones, P., Temperature decreases in an urban canyon due to green walls and green roofs in diverse climates, Building and Environment 43, pp. 480–493, 2008

Kosareo, L.M., The thermal performance and life cycle assessment of a green roof in Pittsburgh, Pennsylvania, University of Pittsburg, pp. 1 – 163, 2007

Velazquez, L.S., Organic Greenroof Architecture: Sustainable Design for the New Millennium, Wiley Periodicals, Inc., Environmental Quality Management/Summer, pp. 1-20, 2005

Ray, S. D., Energy saving potential of various technologies, Massachusetts Institute of Technology, pp. 1 – 168, 2010

Lui, S. T. E., Life Cycle Assessment of Green Roof Systems in Hong Kong, The University of Hong Kong, pp. 1 – 107, 2008

Castleton, H.F., Stovin, V., Beck, S.B.M., Davison, J.B., Green roofs; building energy savings and the potential for retrofit, Energy and Buildings 42, pp. 1582–1591, 2010

Krauter, S., Araújo, R.G., Schroer, S., Hanitsch, R., Salhi, M.J., Triebel, C., Lemoine, R., Combined photovoltaic and solar thermal systems for facade integration and building insulation, Solar Energy Vol. 67, Nos. 4–6, pp. 239–248, 1999

Kumar, R., Kaushik, S.C., Performance evaluation of green roof and shading for thermal protection of buildings, Building and Environment 40, pp. 1505–1511, 2005

Berndtsson, J.C., Bengtsson, L., Jinno, K, Runoff water quality from intensive and extensive vegetated roofs, Ecological engineering 35, pp. 369–380, 2009

Carter, T., Jackson, C.R. Vegetated roofs for stormwater management at multiple spatial scales, Landscape and Urban Planning 80, pp. 84–94, 2007

Carter, T., Keeler, A., Life-cycle cost–benefit analysis of extensive vegetated roof systems, Journal of Environmental Management 87, pp. 350–363, 2008

Porsche, U., Köhler, M., Life cycle costs of green roofs - a comparison of Germany, USA, and Brazil, RIO 3, World Climate & Energy Event, Rio de Janeiro, Brazil, pp. 461 - 467, 1-5 December 2003

Van Renterghem, T., Botteldooren, D., Numerical evaluation of sound propagating over green roofs, Journal of Sound and Vibration 317, pp. 781–799, 2008

Van Renterghem, T., Botteldooren, D., Reducing the acoustical façade load from road traffic with green roofs, Building and Environment 44, pp. 1081–1087, 2009

Yang, H.S., Kang, J., Choi, M.S., Acoustic effects of green roof systems on a low-profiled structure at street level, Building and Environment 50, pp. 44-55, 2012

Pearlmutter, D., Rosenfeld, S., Performance analysis of a simple roof cooling system with irrigated soil and two shading alternatives, Energy and Buildings 40, pp. 855–864, 2008

Bin Ahmed, H. Rashid, R. Thermal Performance of Rooftop Greenery system in Tropical Climate of Malaysia, Conference On Technology & Sustainability in the Built Environment, Vol 37, No 1, pp. 391 – 408, 2009, King Saud University - College of Architecture and Planning

Liu, K.; Baskaran, B., Thermal performance of green roofs through field evaluation, Proceedings for the First North American Green Roof Infrastructure Conference, Awards and Trade Show, pp. 1-10, May, 2003, Chicago, IL

Onishi, A., Cao, X., Ito, T., Shi, F., Imura, H., Evaluating the potential for urban heat-island mitigation by greening parking lots, Urban Forestry & Urban Greening 9, pp. 323–332, 2010

Niachou, A., Papakonstantinou, K., Santamouris, M., Tsangrassoulis, A., Mihalakakou, G., Analysis of the green roof thermal properties and investigation of its energy performance, Energy and Buildings 33, pp. 719-729, 2001

Rajasekar, U., Wen, Q., Urban heat island monitoring and analysis using a non-parametric model: A case study of Indianapolis, ISPRS Journal of Photogrammetry and Remote Sensing 64, pp. 86-96, 2009

Getter, K.L., Rowe, D. B., The Role of Extensive Green Roofs in Sustainable Development, HORTSCIENCE 41(5), pp. 1276–1285, 2006


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