Geo-Climatic Applicability of Direct Evaporative Cooling in Italy

  • Giacomo ChiesaEmail author
  • Fabio Acquiletti
  • Mario Grosso
Conference paper


This chapter focuses on the climatic applicability of passive direct (downdraught) evaporative cooling (PDEC) techniques in the provincial capital cities of Italy. First, a PDEC potentiality map was produced using a previously developed method based on three variables: wet bulb depression, summer comfort air temperature threshold (25 °C) and cooling degree hours (CDHs). Second, an applicability map was produced by comparing the PDEC potentiality map to the local cooling energy demand. Third, a new method is presented including a calculation of the residual local cooling energy demand, i.e. residual CDH, related to air treatment by direct evaporative cooling. These residual CDH values were calculated considering different step-wise increasing outlet temperatures (WBT; WBT + 1 °C; …; WBT + 5 °C) as a function of the covered amount of wet bulb depression. Finally, three cities chosen as being representative of their respective Italian climatic macro-zones were selected in order to assess in greater detail the yearly variation of CDH aimed at supporting specific design strategies for ventilative passive cooling solutions.


Climatic applicability Direct evaporative cooling Passive cooling GIS analysis 



Wet bulb temperature


Dry bulb temperature


Wet bulb depression


Cooling degree hours






Set-point temperature


Temperature of comfort for adaptive model


External running mean temperature


Humidity rate [%]


Water vapour in mass unit of dry air [kg/kg]


Passive direct (downdraught) evaporative cooling


  1. 1.
    Santamouris M (2007) Preface: why passive cooling? In: Santamouris M (ed) Advances in passive cooling. Earthscan, London, pp xix–xxxiiGoogle Scholar
  2. 2.
    Unità centrale Studi e strategie dell’ENEA (2013) Verso un’Italia low carbon: sistema energetico, occupazione e investimenti, Rapporto Energia e Ambiente. Scenari e strategie, ENEA, RomaGoogle Scholar
  3. 3.
    European Commission (2010) How to develop a sustainable energy action plan (SEAP)—guidebook. Publications Office of the European Union, Luxembourg, p 63Google Scholar
  4. 4.
    Ford B, Schiano-Phan R, Francis E (eds) (2010) The architecture & engineering of downdraught cooling. A design sourcebook. PHDC Press, LondonGoogle Scholar
  5. 5.
    Moura R, Ford B (2003) ALTENER FINAL REPORT. Part 1: market assessment of passive downdraught evaporative cooling in non-domestic buildings in southern Europe, final report. ALTENER II project on solar passive heating and cooling. European Commission—DG ResearchGoogle Scholar
  6. 6.
    Salmeron JM, Sànchez FJ, Sànchez J, Alvarez S, Molina LJ, Salmeron R (2012) Climatic applicability of downdraught cooling in Europe. Arch Sci Rev 55(4):259–272CrossRefGoogle Scholar
  7. 7.
    Xuan H, Ford B (2012) Climatic applicability of downdraught cooling in China. Arch Sci Rev 55(4):273–286. doi: 10.1080/00038628.2012.717687 CrossRefGoogle Scholar
  8. 8.
    Bom GJ, Foster R, Dijkstra E, Tummers M (1999) Evaporative air-conditioning: applications for environmental friendly cooling. Word Bank Technical Paper No. 421. Energy Series, WashingtonCrossRefGoogle Scholar
  9. 9.
    Comitato Termotecnico Italiano (CTI) (2014) Hourly typical meteorological data for Italian Provincial Capital cities, in accordance with ENEA and Italian Ministry of economic development.
  10. 10.
    Chiesa G, Grosso M (2015) The influence of different hourly typical meteorological years on dynamic simulation of buildings. Energy Procedia 78:2560–2565CrossRefGoogle Scholar
  11. 11.
    Costelloe B, Finn D (2003) Indirect evaporative cooling potential in air-water systems in temperate climates. Energy Build 35:573–591CrossRefGoogle Scholar
  12. 12.
    Erell E (2007) Evaporative cooling. In: Santamouris M (ed) Advances in passive cooling. Earthscan, London, pp 228–261Google Scholar
  13. 13.
    Givoni B (1994) Passive and low energy cooling of buildings. Van Nostrand Reinhold, New YorkGoogle Scholar
  14. 14.
    Stull R (2011) Wet-bulb temperature from relative humidity and air temperature. J Appl Meteorol Climatol 50:2267–2269CrossRefGoogle Scholar
  15. 15.
    Chiesa G, Grosso M (2015) Direct evaporative passive cooling of building. A comparison amid simplified simulation models based on experimental data. Build Environ 94:263–272. doi: 10.1016/j.buildenv.2015.08.014 CrossRefGoogle Scholar
  16. 16.
    Chiesa G, Grosso M (2015) Geo-climatic applicability of natural ventilative cooling in the Mediterranean area. Energy Build 107:376–391. doi: 10.1016/j.enbuild.2015.08.043i CrossRefGoogle Scholar

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Authors and Affiliations

  • Giacomo Chiesa
    • 1
    Email author
  • Fabio Acquiletti
    • 1
  • Mario Grosso
    • 1
  1. 1.Department of Architecture and Design—DADPolitecnico di TorinoTurinItaly

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