Environmental Engineering Reference
In-Depth Information
Table 6.4 EPI limits for the determination of the energy performance class of the test house
Energy
performance class
Lower limit
of the EPI (kWh/m 2 )
Higher limit
of the EPI (kWh/m 2 )
A+
0
16.05
A
16.05
23.10
B
23.10
33.15
C
33.15
46.20
D
46.20
56.25
E
56.25
73.35
F
73.35
100.5
G
100.5
-
systems, so as to minimize the heat losses during winter and the thermal gains
during summer. A purely passive project would exclude any mechanical means
(i.e. pumps, ventilation systems,…), but this would result not appropriate in many
cases, since the consideration of electrical or mechanical appliances is normally
desirable to allow the passive elements to work correctly and efficiently.
6.6
Case Study
The test house is located in a Euro Mediterranean area in the city of Palermo,
Sicily Italy, and is a single-family house. In what follows according to the regu-
latory and scientific framework described above, the economic evaluation about
the impact of both active and passive measures is carried out. A further example
can be found in (Riva Sanseverino et al. 2013 ).
6.6.1
Active Measures
The test house is reported in Fig. 6.4 . It is a medium size Italian house of about
140 m 2 floor area, indoor and outdoor lighting system and a conditioning system
based on fan-coil units, hot or cold water are provided by a centralized thermal/
cooling system. The house is a cottage located in a Mediterranean city, Palermo,
inside the climatic zone B with HDD = 751. The ratio S/V for the house is 0.3.
The EPIL for the case study, calculated from Table 6.1 is 15.1 kWh/m 2 per year.
In Table 6.4 , are reported the ranges of the EPI for each energy performance
class for the case study, calculated on the basis of Table 6.2 .
The characteristics of the supply are:
• Single-phase system;
• Rated Voltage and frequency: 230 V/50 Hz.
The electric loads in the house are listed in Table 6.5 .
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