Civil Engineering Reference
In-Depth Information
8 Conclusions
The assessment methodologies to evaluate the energy performance of a building
are associated with very detailed and complex procedures and require a large
number of input data. The possibility of choosing among different calculation
methodologies which can be defined at national or regional level is provided by
EN ISO 13790 and EN 15316.
The aim of the analysis is to point out the complexity of the application of the
different methodologies provided by Italian Standards in correlation with partic-
ular aspects that can be significant in the performance indicators definition.
Lots of typical refurbishment actions on building envelope and heating system
have been simulated in order to evaluate the energy performance improvement.
The results highlight that the assessment methods and the parameters evaluation
significantly affect global energy performance. Therefore, in order to evaluate the
effectiveness of refurbishment actions, the uncertainties related to calculation
procedures have to be considered, since in some cases, they determine a different
energy class.
Finally, the analyses are related to specific case studies, and further investi-
gations have to be developed considering different building typologies and
construction features. Nevertheless, the approach represents a methodological base
for energy performance assessment and energy conservation measures evaluation.
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