30
Figure 32. Delivered and primary energy consumption before and after the energy renovation
It appears that the primary energy consumption at Stengårds School is reduced by 34% by implementing
the energy renovation measures. Taking into consideration also the energy production by the PV system on
the school, the primary energy is reduced an additional 49 kWh/m²a down to 39 kWh/m²a, which
corresponds to what is today referred to as "low-energy class 2015" requirements in the present Danish
Building Regulations. "Low-energy class 2015" is expected to become the requirement for new buildings
from 2015 and onwards.
The total CO
2
reduction is 394 tons/year for the energy saving measures and 87 tons/year for the PV
system, i.e. a total CO
2
-reduction of 481 tons/a.
Table 5. Energy consumption before and after the energy renovation of Stengaards School
Annual energy consumption
Heating
Electricity
Total (Primary)
Total (Primary)
[kWh/m
2
a]
[kWh/m
2
a]
[kWh/m
2
a]
[kWh/a]
Before energy renovation
97.7
17.7
142.0
1,254,412
After energy renovation
55.5
13.0
88.0
777,656
Energy saving
42.2
4.7
54.0
476,756