Z E M C H 2 0 1 2 I n t e r n a t i o n a l C o n f e r e n c e
366
there comfortably, without cooling plants or other kind of aid. Their health quality makes
them an architectonic element which is very appreciated; in fact during the years the
islands have chosen by VIPs and
Archistars
for their holidays; and many of them have
bought a traditional home and refurbished it.
GENERAL INPUTS
Climatic area (A-F)
B
Daily Degree
758
Type of the building
residential
Volumes
m³
954,00
COOLING
Energy requirement for cooling the building
kWh
2818,141
Floor area
m²
159,00
Quality judigment
very good
Class of the envelope (I-IV)
II
EPI
kWh/(m²·a)
17,724
Figure 6: indicators of the energy performance of the study case.
However I think that it is a good rule to transform the pragmatic knowledge in scientific
expertise through the measurement of the most significant thermotechnical parameters.
The Energy Performance Index (EPI) is certainly the most important of these. I have
calculated it for a specific Filicudian house, chosen as case study, obtaining values
rounding to 17 KWh/m
2
·
y
(fig. 6), restricting the time to the summer season. This
limitation is correct because, as you can well understand, these type of houses are used
primarily during this period. So it is very close to the Passive House standard, especially
in the versions studied for the southern European countrie
. As you know this value is
strictly influenced by the following aspects:
- the orientation of windows,
- the type of the building envelope,
- the existence of shading systems,
- the possibility of natural ventilation.
All these are qualifying characteristics of Filicudian house.
You must consider also that the values of the temperature offset and attenuation of its
peak are very positive (Fig. 7); in fact they move around more than 15 hours and 5%, for
vertical elements and less than 10 hours and 15%,for horizontal ones.
So the mathematic approach has confirmed the intuitive observations.
Conclusion
The good organization of the buildings, from architectonical and constructive point of
view, is the most important requirement to reduce the energy cost of them, as the
analysis of the Filicudian house has showed. This advantage is greater during the
summer season, but it is not a limitation, because it is often the period in which they are
inhabited.
So the Filicudian house should become a reference model for the seasonal buildings as
holiday houses, residences and resorts etc. Generally the orientation of this type of
building is guided by the panoramic view, light materials are preferred for the envelope to
minimize the economic costs and the forced ventilation to minimize the frontal area. But
in the actual World situation regarding energy consumptions and pollution suggests that
we have to rediscover the Aeolian houses and other similar magnificent examples.
14
Massimiliano Fuxas spends his holidays here, as well as the late Ettore Sottosas. You have to add to
them a large number of jet-set members and political men.
15
The computation was carried out with MASTERCLIMA, a open source software; it is designed by
‘AERMEC MC Impianti’ and based on the actual standard (see UNI/TS 11300).
16
Regarding this subject I suggest you see Passive-On Project.
