Civil Engineering Reference
In-Depth Information
120%
Baseline scenario
100%
80%
60%
40%
20%
0%
-
20%
-40%
OPD
[kg CFC-
11eq]
GWP
[kg CO2eq]
POCP
[kg C2H4eq]
AP
[kg SO2 eq.]
NP
[kg PO43-eq]
Transports
56,106
0.01
86
220
71
End of life
-203,815
-0.04
-196
-795
334
Replacement
400,997
0.05
447
1,381
542
Operation
91,081
0.02
40
216
59
Production
580,689
0.06
488
1,819
744
Fig. 8 Contribution analysis of the different life cycle phases to the other environmental impact
indicators in the baseline scenario
impacts. This fact is essentially due to the assessment of the energy and envi-
ronmental benefits arisen from the C&D waste recycling.
With regard to the transport phase, it involves a slight decrease in all the
environmental indicators (not more than 2 %).
3.5 Energy and Environmental Benefits Arisen
from the Refurbishment Scenario
The one-year monitoring activity was carried out to quantify the annual energy
input and output flows across the existing building. The outcomes allowed to
perform the annual net energy balance at final use level (see Sect.
2.1
).
Taking into account a service life of 70 years, the net primary energy con-
sumption for electricity during the building operation is assessed in both scenarios
(Fig.
10
). No variation is taken into account for the primary energy consumption
related to the auxiliary thermal need, as well as that one due to the water use
during the building life cycle, when moving from the Baseline scenario to the
Refurbishment one.
Figure
11
shows the GWP balance during the operation phase of the building in
both scenarios. In detail, the GWP due to the primary energy consumption during
