Page 90 - New Trends in Green Construction

Energy Efficient Building
𝑃𝑖 𝑥 100 (1) The results of energy saving of the three plots with green roofs, compared to the reference plot, are
𝐸𝑛𝑒𝑟𝑔𝑦 𝑠𝑎𝑣𝑖𝑛𝑔(%) =
𝑄´
−𝑄´
𝑃𝑖
𝑟𝑒𝑓 𝑄´
shown in Figure 2.
o
Figure 2. Energy saving of the three green roofs.
It can be observed that all plots with green roofs achieved energy saving greater than 67.5 %, w i t h respecttothereferenceplot.TheplotthatachievedthebestresultswasP1,withameanvalue of energy saving of 90.0%. The greater reduction was obtained in August, with a value of 92.3%. This behavior is mainly due to the capacity of the substrate to retain water. The results suggested that all the green roofs allow a significant reduction of energy gains during the summer months. In conclusion, green roofs can be considered as an interesting passive construction system to achieve energy saving in buildings located in South European climates.
3. Acknowledgements
Weather data from the Agroclimatic Information Network of Andalusia which have been supplied by the Institute of Research and Agricultural and Fisheries Training of the CAPDR of the Andalucía Regional Administration, Junta de Andalucía. The authors would like to express appreciation for the financial support of the European Regional Development Fund (ERDF).
4. References
Besir, A.B., Cuce, E., 2018. Green roofs and facades: A comprehensive review. Renew. Sustain. Energy Rev. 82, 915–939.
Li, D.H.W., Yang, L., Lam, J.C., 2013. Zero energy buildings and sustainable development implications - A review. Energy 54, 1–10.
Shafique, M., Kim, R., Rafiq, M., 2018. Green roof benefits, opportunities and challenges – A review. Renew. Sustain. Energy Rev. 90, 757–773.
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