Advertisement

The Energy Performance of Green Roof in Sub-arctic Climate

  • Jutta SchadeEmail author
  • Farshid Shadram
Conference paper
Part of the Springer Proceedings in Energy book series (SPE)

Abstract

Green roofs are complex technology systems, adopting a vegetation layer on the outermost surface of the building shell. A proper design implement environmental and energy benefits. Green roof are aimed to reduce roof temperature and thus the summer solar gains, without worsening the winter energy performance. Most studies evaluating green roof performance have been conducted in warmer climates. There are very limited studies of green roofs in cold climate. Some research has investigated the thermal effect of the snow layer on green roof. But no study has so far evaluated the energy performance of green roof in sub-arctic climate. This study evaluates the heat flow and thermal effect on a green roof situated on a passive house building in the sub-arctic town Kiruna, Sweden for a period from 25th of October—4th of January. The ongoing measurements of temperature and heat flux is done on an extensive green roof and compared to the same roof covered solely by a roofing felt layer. The fluctuation in temperature was consistently higher for the roof with the roofing felt layer than for the green roof. But the surface temperature of both roofs was getting more and more align as the roofs are covered by snow during November and December. However during December month the green roof had a higher heat flux out of the building compared to the black roof.

Keywords

Green roof Building energy 

Notes

Acknowledgements

We greatly acknowledge the financial support of the Swedish Research Council Formas grant 2014-854.

References

  1. 1.
    J. Mentens, D. Raes, M. Hermy, Green roofs as a tool for solving the rainwater runoff problem in the urbanized 21st century? Landscape Urban Plann. 77, 217–226 (2006)CrossRefGoogle Scholar
  2. 2.
    R. Fioretti, A. Palla, L.G. Lanza, P. Principi, Green roof energy and water related performance in the Mediterranean climate. Build. Environ. 45, 1890–1904 (2010)CrossRefGoogle Scholar
  3. 3.
    J.C. Berndtsson, L. Bengtsson, K. Jinno, Runoff water quality from intensive and extensive vegetated roofs. Ecol. Eng. 35, 369–380 (2009)CrossRefGoogle Scholar
  4. 4.
    J. Yang, Q. Yu, P. Gong, Quantifying air pollution removal by green roofs in Chicago. Atmos. Environ. 42, 7266–7273 (2008)CrossRefGoogle Scholar
  5. 5.
    D. Banting, H. Doshi, J. Li, P. Missios, Report on the Environmental Benefits and Costs of Green Roof Technology for the City of Toronto (2005)Google Scholar
  6. 6.
    T. Van Renterghem, D. Botteldooren, In-situ measurements of sound propagating over extensive green roofs. Build. Environ. 46, 729–738 (2011)CrossRefGoogle Scholar
  7. 7.
    M. Santamouris, C. Pavlou, P. Doukas, G. Mihalakakou, A. Synnefa, A. Hatzibiros et al., Investigating and analysing the energy and environmental performance of an experimental green roof system installed in a nursery school building in Athens, Greece. Energy 32, 1781–1788 (2007)CrossRefGoogle Scholar
  8. 8.
    T.G. Theodosiou, Summer period analysis of the performance of a planted roof as a passive cooling technique. Energy Build. 35, 909–917 (2003)CrossRefGoogle Scholar
  9. 9.
    Q. Meng, W. Hu, Roof cooling effect with humid porous medium. Energy Build. 37, 1–9 (2005)CrossRefGoogle Scholar
  10. 10.
    S. Ouldboukhitine, R. Belarbi, R. Djedjig, Characterization of green roof components: measurements of thermal and hydrological properties. Build. Environ. 56, 78–85 (2012)CrossRefGoogle Scholar
  11. 11.
    N.H. Wong, D.K.W. Cheong, H. Yan, J. Soh, C.L. Ong, A. Sia, The effects of rooftop garden on energy consumption of a commercial building in Singapore. Energy Build. 35, 353–364 (2003)CrossRefGoogle Scholar
  12. 12.
    O. Saadatian, K. Sopian, E. Salleh, C.H. Lim, S. Riffat, E. Saadatian et al., A review of energy aspects of green roofs. Renew. Sustain. Energy Rev. 23, 155–168 (2013)CrossRefGoogle Scholar
  13. 13.
    K.L. Getter, D.B. Rowe, J.A. Andresen, I.S. Wichman, Seasonal heat flux properties of an extensive green roof in a Midwestern U.S. climate. Energy Build. 43, 3548–3557 (2013)CrossRefGoogle Scholar
  14. 14.
    G. Spolek, Performance monitoring of three ecoroofs in Portland, Oregon. Urban Ecosyst. 11, 349–359 (2009)CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of Civil, Environmental and Natural Resources EngineeringLuleå University of TechnologyLuleåSweden

Personalised recommendations