Definition, analysis and application of a Climatic Severity Index aimed at zoning the Italian territory for summer air conditioning of buildings

L. Terrinoni, P. Signoretti, D. Iatauro, C. Romeo, A. Federici

Research output: Contribution to journalArticle


Italian territory is currently divided into climatic zones on the basis of a winter Climatic Severity Index, the Heating Degree Days, thanks to which bound values for primary energy need of buildings have been fixed (according to the European Directive 2002/91/CE). About summer air conditioning, any zoning of Italian territory does not exist yet, because of the lack of a summer Climatic Severity Index definition: as a consequence, a given building cannot be classified on the basis of its energy need and geographical position. The definition of a Climatic Severity Index for the summer season is more complex with respect to the winter case: indeed, given the combined effect of the different climatic variables, the analysis of the energy performance of a building, is more complex and must be carried out at least on an hourly scale. Thanks to a cluster analysis 20 Italian representative towns, characterized by different climatic profiles, have been selected. Then, some benchmark buildings have been considered and, through a dynamic simulation software, their cooling energy need have been assessed. The analysis of the results has highlighted the opportunity to express the energy need as a function of the observed climatic variables: this way, an index able to subdivide the Italian territory into summer climatic zones has been derived.
Original languageEnglish
Pages (from-to)155 - 162
Number of pages8
JournalInternational Journal of Heat and Technology
Issue number2
Publication statusPublished - 2010
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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