Civil Engineering Reference
In-Depth Information
Fig. 9 GER compared to the
total energy saving in Vilnius
case study
4 Discussion of the Results and Conclusions
Looking at the assessment outcomes, the most significant benefits (energy saving
and avoided GWP) are related to the improvement of the quality of envelope
thermal insulation (high-efficiency windows and thermal insulating boards).
Substitution of insulation, lighting and glazing components were the most efficient
solutions.
In all the case studies, renovation of HVAC plants and lighting systems pro-
vides significant energy benefits. Both for solar and wind plants, a generally
overestimated energy production at the design stage was observed with regards to
the monitored one. This involved lower energy savings and higher payback indices
than the predicted ones.
In detail, the following key considerations can be traced. For each case study,
the retrofit actions involve about 50 % of energy saving for heating, except for
Fig. 10
Contribution of each retrofit actions to the GER in Vilnius case study
