165
Summer Sunshine
In order to contain the phenomenon of “Urban Heat Island”, and the resulting overheating in the summer, it is necessary to simultaneously control the shading and
manage a strategic relationship between the paved and built areas and green spaces,
their position with reference to constructed and which finishing materials the outer
surfaces have been chosen, within those with high reflectance characteristics of
solar radiation. The shell of the buildings must be protected from the effects of solar
radiation with specific solutions, such as ventilation of the same or with a double
ventilated outer covering, green roofs, etc.
The external parking spaces and pedestrian paths, should be properly shaded. An
obvious shielding effect is given by trees and vegetation. It’s important to choose the
essences in terms of their form and content of their character but also of their cast
shadow. The beneficial effect of shading is more significant if the trees provide
shade in the heated season, especially for deciduous plants that do not interfere with
the winter sunshine. The use of green roofs is an excellent solution to reduce the load
on summer thermal cover and to limit the “heat island phenomenon” in a neighbourhood next to the intervention. And through the appropriate placement of plants, the
local microclimate can be optimized by choosing the type of paved surfaces. The
surfaces with which the user can come into contact have to submit poor attitude to
overheating, through a feature of high reflectance of solar radiation and emissions.
Winter Sunshine
The only access to the building structures and outdoor spaces (in particular the stopping places) must be carefully controlled in relation to any external obstructions.
If there are areas devoted to active or passive solar house systems is required to
control the sun exposure of the same. It is required that is guaranteed exposure to
the sun more than 80 % occurred at 12 pm on December 21.
Method of Verification at the Design Stage
Technical report which explains the design process carried out,with reference to the
performance specifications as above and giving reasons for decisions taken.
This report will demonstrate the control design through the use of daylight control
tools (for instance: solar axonometriy) to analyze and document the effect of strategies
on the control of energy intake on the aggregation of buildings and on outdoor spaces.
To control the effects of shading is to analyze the shielding (artificial plants or
mixed) that restrict access of direct solar radiation on the outdoor areas of the site
and on the fronts of buildings and roofs of the various projects.
The distance between the buildings or the placement of other obstructions
induced by the intervention should be calculated on the basis of the above effects.
The verification tools with daylight control is mandatory in the case are provided
for passive and active solar systems, the “solar access” must be assessed in places
(roofs, roofs, etc. …) in which it is expected they will be installed. This verification
will be aimed to the definite project of every single building of the area.
Method of Verification at Work Completed
Declaration of conformity of the work carried out with respect to the project.
6 UHI in the Metropolitan Cluster of Bologna-Modena...
Summer Sunshine
In order to contain the phenomenon of “Urban Heat Island”, and the resulting overheating in the summer, it is necessary to simultaneously control the shading and
manage a strategic relationship between the paved and built areas and green spaces,
their position with reference to constructed and which finishing materials the outer
surfaces have been chosen, within those with high reflectance characteristics of
solar radiation. The shell of the buildings must be protected from the effects of solar
radiation with specific solutions, such as ventilation of the same or with a double
ventilated outer covering, green roofs, etc.
The external parking spaces and pedestrian paths, should be properly shaded. An
obvious shielding effect is given by trees and vegetation. It’s important to choose the
essences in terms of their form and content of their character but also of their cast
shadow. The beneficial effect of shading is more significant if the trees provide
shade in the heated season, especially for deciduous plants that do not interfere with
the winter sunshine. The use of green roofs is an excellent solution to reduce the load
on summer thermal cover and to limit the “heat island phenomenon” in a neighbourhood next to the intervention. And through the appropriate placement of plants, the
local microclimate can be optimized by choosing the type of paved surfaces. The
surfaces with which the user can come into contact have to submit poor attitude to
overheating, through a feature of high reflectance of solar radiation and emissions.
Winter Sunshine
The only access to the building structures and outdoor spaces (in particular the stopping places) must be carefully controlled in relation to any external obstructions.
If there are areas devoted to active or passive solar house systems is required to
control the sun exposure of the same. It is required that is guaranteed exposure to
the sun more than 80 % occurred at 12 pm on December 21.
Method of Verification at the Design Stage
Technical report which explains the design process carried out,with reference to the
performance specifications as above and giving reasons for decisions taken.
This report will demonstrate the control design through the use of daylight control
tools (for instance: solar axonometriy) to analyze and document the effect of strategies
on the control of energy intake on the aggregation of buildings and on outdoor spaces.
To control the effects of shading is to analyze the shielding (artificial plants or
mixed) that restrict access of direct solar radiation on the outdoor areas of the site
and on the fronts of buildings and roofs of the various projects.
The distance between the buildings or the placement of other obstructions
induced by the intervention should be calculated on the basis of the above effects.
The verification tools with daylight control is mandatory in the case are provided
for passive and active solar systems, the “solar access” must be assessed in places
(roofs, roofs, etc. …) in which it is expected they will be installed. This verification
will be aimed to the definite project of every single building of the area.
Method of Verification at Work Completed
Declaration of conformity of the work carried out with respect to the project.
6 UHI in the Metropolitan Cluster of Bologna-Modena...