Fig. 6 presents the results of the row house for Barcelona,
Palermo and Cairo. Barcelona is the cooler among the three selected
cities and this affects the final results. The most efficient solution for
the insulated configuration is the metallic cool roof a total energy
saving close to 7%; slightly lower savings (6.2%) are calculated for
GR. Green roof is the most effective technique for the not insulated
configuration, with an energy demand reduction of close to 12%;
due to the extra insulation of the soil and vegetation layer. Cool
roof are by far the best cooling efficient technique for both configurations,
with almost no need of cooling systems for the two
configurations. The impact on the energy demand is negative for
the two configurations, because of the increase of heating demand
due to the reduced solar gains through the roof. CR is the most
performing solution for the insulated row house in Palermo, with
global savings close to 15%. The CR low-e application gives a 10%
energy savings, while limited advantages are obtained with GR.
Very close results, around 11% of energy savings, are obtained for
the three roof solutions for the not insulated configuration. The
energy reduction is all in cooling mode for CR, while metallic cool
and green roof reduce both, the heating and the cooling demand.
Cairo is cooling dominated and CR gives the best results in summer
and in the whole year, with a reduction of total energy demand
between 30% and 40% for the two building configurations. CR lowe
and GR ensure energy savings between 11% and 18%, except for
GR for the insulated configuration, since the extra insulation does
not lead to cooling reduction in hot climates.