Heat Fluxes in a Green Façade System: Mathematical Relations and an Experimental Case

  • Fabiana ConvertinoEmail author
  • Giacomo Scarascia Mugnozza
  • Evelia Schettini
  • Giuliano Vox
Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 67)


The need of greater environmental sustainability in today’s living contexts can be significantly coped through the introduction of green infrastructures. Their benefits concern improvement of climate and comfort conditions. Among green infrastructures, vertical greenery systems, applied to buildings, contribute to the energy efficiency of buildings and to the improvement of outdoor and indoor microclimatic conditions. Green façades, a typology of vertical greenings, allow a considerable energy saving for air conditioning, by reducing the surfaces temperature of buildings and increasing the envelope thermal insulation. A realistic description of the functioning of green façades is essential to comprehend the real extent of their advantages. This paper aims to provide a first answer to the need of energy simulation models for green façades’ thermal behavior. The paper proposes a theoretical and an experimental approach. The main heat fluxes involved into the green façade system are investigated and described, by resorting to a schematic representation. The defined mathematical relations are applied to data collected during an experiment on a green façade conducted at the University of Bari. This work represents a contribution to the development of a model to forecast the thermal behavior of green façades and of the microclimate of buildings equipped with them.


Vertical greenings Energy saving Heat flux Green layer Evapotranspiration 



The contribution to programming and conducting this research must be equally shared between the Authors. The present work has been carried out under the “Studio di tecniche di realizzazione di un prototipo di edificio con parete verde a microclima controllato per testare il modello del flusso energetico tra la parete verde e la superficie dell’edificio”; Sistema Elettrico Nazionale, Progetto D.1 ‘Tecnologie per costruire gli edifici del futuro’, Piano Annuale di Realizzazione (PAR) 2018”, Accordo di Programma Ministero dello Sviluppo Economico—ENEA funded by the Italian Ministry of Economic Development.


  1. Bianco, L., Serra, V., Larcher, F., & Perino, M. (2017). Thermal behaviour assessment of a novel vertical greenery module system: First results of a long-term monitoring campaign in an outdoor test cell. Energy Efficiency, 10, 625–638.CrossRefGoogle Scholar
  2. Blanco, I., Schettini, E., Scarascia Mugnozza, G., Campiotti, C. A., Giagnacovo, G., & Vox, G. (2017). Vegetation as a passive system for enhancing building climate control. Acta Horticulturae, 1170, 555–561.CrossRefGoogle Scholar
  3. Bowler, D. E., Buyung-Ali, L., Knight, T. M., & Pullin, A. S. (2010). Urban greening to cool towns and cities: A systematic review of the empirical evidence. Landscape and Urban Planning, 97, 147–155.CrossRefGoogle Scholar
  4. Cameron, R. W. F., Taylor, J. E., & Emmett, M. R. (2014). What’s “cool” in the world of green façades? How plant choice influences the cooling properties of green walls. Building and Environment, 73, 198–207.CrossRefGoogle Scholar
  5. Convertino, F., Vox, G., & Schettini, E. (2019). Heat transfer mechanisms in vertical green systems and energy balance equations. International Journal of Design & Nature and Ecodynamics 14, 7–18.Google Scholar
  6. European Commission. (2013). Building a Green Infrastructure for Europe.Google Scholar
  7. Ip, K., Lam, M., & Miller, A. (2010). Shading performance of a vertical deciduous climbing plant canopy. Building and Environment, 45, 81–88.CrossRefGoogle Scholar
  8. Jim, C. Y., & He, H. (2011). Estimating heat flux transmission of vertical greenery ecosystem. Ecological Engineering, 37, 1112–1122.CrossRefGoogle Scholar
  9. Kontoleon, K. J., & Eumorfopoulou, E. A. (2010). The effect of the orientation and proportion of a plant-covered wall layer on the thermal performance of a building zone. Building and Environment, 45, 1287–1303.CrossRefGoogle Scholar
  10. Malys, L., Musy, M., & Inard, C. (2014). A hydrothermal model to assess the impact of green walls on urban microclimate and building energy consumption. Building and Environment, 73, 187–197.CrossRefGoogle Scholar
  11. Norton, B. A., Coutts, A. M., Livesley, S. J., Harris, R. J., Hunter, A. M., & Williams, N. S. G. (2015). Planning for cooler cities: A framework to prioritise green infrastructure to mitigate high temperatures in urban landscapes. Landscape and Urban Planning, 134, 127–138.CrossRefGoogle Scholar
  12. Pérez, G., Coma, J., Martorell, I., & Cabeza, L. F. (2014). Vertical Greenery Systems (VGS) for energy saving in buildings: A review. Renewable and Sustainable Energy Reviews, 39, 139–165.CrossRefGoogle Scholar
  13. Perini, K., Ottelé, M., Fraaij, A. L. A., Haas, E. M., & Raiteri, R. (2011). Vertical greening systems and the effect on air flow and temperature on the building envelope. Building and Environment, 46, 2287–2294.CrossRefGoogle Scholar
  14. Schettini, E., Vox, G., Blanco, I., Campiotti, C. A., & Scarascia Mugnozza, G. (2018). Green walls for building microclimate control. Acta Horticulturae, 1215, 73–76.CrossRefGoogle Scholar
  15. Susorova, I., Angulo, M., Bahrami, P., & Stephens, Brent. (2013). A model of vegetated exterior facades for evaluation of wall thermal performance. Building and Environment, 67, 1–13.CrossRefGoogle Scholar
  16. Vox, G., Blanco, I., & Schettini, E. (2018). Green façades to control wall surface temperature in buildings. Building and Environment, 129, 154–166.CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Fabiana Convertino
    • 1
    Email author
  • Giacomo Scarascia Mugnozza
    • 1
  • Evelia Schettini
    • 1
  • Giuliano Vox
    • 1
  1. 1.Department of Agricultural and Environmental Science (DISAAT)University of Bari “Aldo Moro”BariItaly

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