188
In order to assess the effects of trees, the shading in the yards due to the tree
crowns (also with reference to the loss of shading due to proximity of trees with the
property limits) is assessed, as well as the consequent loss of energy on the garden.
In the calculation, the thermal energy absorbed by the tree crowns is also calculated,
but the shades, if any, on the building walls is not assessed.
4.3 Index Output
Calculating the index, the total thermal energy absorbed by the surfaces making up
the building lot (kWh/year) is calculated in the Actual State and in the Planned
State. The ratio between these values and the Land Area (SF) is the index reference
parameter (kWh/year per m 2 of SF). By associating the thermal energy absorbed by
all the surfaces in the building lot with the Land Area only, we take into consideration the “weight” of the building volume (if the volume grows, the index grows, the
SF being the same).
The output value is the measure of specific “performances” of the building lot
and can be highlighted depending on various features.
• the class of the planned scenario (SDP) identifies the quality of the action;
• by processing the different classes of energy performance which output values
are associated with, the number of reduced classes between the initial scenario
(SDF) and the planned scenario (SDP) highlights the improvements achieved;
• the total reduction of thermal energy absorbed (kWh/year) in the planned scenario (SDP), in comparison with the initial scenario (SDF) highlights the extent
of the improvements with reference to the building lot size.
Software output
S. Zauli Sajani et al.
In order to assess the effects of trees, the shading in the yards due to the tree
crowns (also with reference to the loss of shading due to proximity of trees with the
property limits) is assessed, as well as the consequent loss of energy on the garden.
In the calculation, the thermal energy absorbed by the tree crowns is also calculated,
but the shades, if any, on the building walls is not assessed.
4.3 Index Output
Calculating the index, the total thermal energy absorbed by the surfaces making up
the building lot (kWh/year) is calculated in the Actual State and in the Planned
State. The ratio between these values and the Land Area (SF) is the index reference
parameter (kWh/year per m 2 of SF). By associating the thermal energy absorbed by
all the surfaces in the building lot with the Land Area only, we take into consideration the “weight” of the building volume (if the volume grows, the index grows, the
SF being the same).
The output value is the measure of specific “performances” of the building lot
and can be highlighted depending on various features.
• the class of the planned scenario (SDP) identifies the quality of the action;
• by processing the different classes of energy performance which output values
are associated with, the number of reduced classes between the initial scenario
(SDF) and the planned scenario (SDP) highlights the improvements achieved;
• the total reduction of thermal energy absorbed (kWh/year) in the planned scenario (SDP), in comparison with the initial scenario (SDF) highlights the extent
of the improvements with reference to the building lot size.
Software output
S. Zauli Sajani et al.