IOP CONFERENCE SERIES. EARTH AND ENVIRONMENTAL SCIENCE
Abstract
The objective of this work is to quantify the effects of the short-term climate change
with a multiyear (MY) approach on the results of the heat and moisture transfer simulations of
an historic building located in Udine (Italy) and to evaluate if a single year simulation could be
representative of the results obtained with the MY. The hygrothermal performance and the
moisture related risk are evaluated for a brick wall with and without insulation, with a MY of 25
years and with three single years selected form the MY. The software DELPHIN is used for the
simulations and the damage indicators are calculated using simplified methods (number of days
with unfavourable conditions). Depending on the damage considered, the years have different
effects on the studied wall. The simulations that use the MY weather file allow to obtain more
accurate results than using one-year simulations, but the effort and time required for the
interpretation of the simulation results could be not acceptable. It is then shown that the choice
of a representative weather file is crucial to the results of the risk analysis and that considering
more than one weather file is necessary to obtain representative results for different damages
mechanisms.
