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The interventions that can be implemented in the walls of the building are:
green wall with frame on wall, green wall integrated into the wall, ventilated wall
with frame on wall, light plaster, dark plaster, wall with exposed brick.
The interventions that can be implemented on the roof of the building are:
green roof, “cold” roof, tiled “cold” roof, photovoltaic roof, tiled roof, light flat
roof, dark flat roof.
2. identifying a physical quantity, as an indicator, and a calculation methodology.
The indicator chosen to estimate the index “rate” is the thermal energy absorption of each surface of the lot, due to the incident solar radiation.
The absorption of thermal energy of a surface represents the amount of energy
that that area is not able to reflect and disperse instantaneously, and therefore
represents the amount of thermal energy that will be released for a certain period
of time. The absorption of thermal energy is therefore able to highlight the capacity of a material to affect the Urban Heat Island.
In order to calculate the absorption of thermal energy a formula is used, which
correlates the technical and physical characteristics of a surface with the incident
solar radiation.
The technical and physical features used for the calculation of a generic surface, are: solar reflectance, emissivity and thermal resistance.
The index “RATE” calculates the sum of the absorption of thermal energy of
all surfaces that constitute the urban lot.
3. analysing the technical and physical features of every surface in the list and of
the existing context, to estimate the indicator. For each of the 20 types of interventions, the respective values of solar reflectance, emissivity and thermal resistance have been estimated. As for walls and roof, different values of thermal
resistance have been calculated, depending on the year of construction.
To quantify the incident solar radiation, the values defined by the norm UNI
10349 are used. Municipality of Modena has obtained a value to be applied on
the roof and different values to be applied to the walls, depending on their orientation. Regarding courtyard areas, an average value was estimated, taking into
account the loss of energy caused by the shading by building volume.
4. adopting the typical/needed approximations of urban indexes.
The Artisan Village Guidelines “Feasibility study of environmental quality
indexes to be applied to building lots”, made by Municipality of Modena, are
attached in Appendix C and the link to the calculation software can be found on the
website of the Municipality of Modena:
http://www.comune.modena.it/laboratoriocitta/laboratoriocitta/pubblicazionieventi/villaggio-artigiano-di-modena-ovest/esiti-del-progetto
and on the website of the Emilia-Romagna Region:
http://territorio.regione.emilia-romagna.it/programmazione-territoriale
6 UHI in the Metropolitan Cluster of Bologna-Modena...
The interventions that can be implemented in the walls of the building are:
green wall with frame on wall, green wall integrated into the wall, ventilated wall
with frame on wall, light plaster, dark plaster, wall with exposed brick.
The interventions that can be implemented on the roof of the building are:
green roof, “cold” roof, tiled “cold” roof, photovoltaic roof, tiled roof, light flat
roof, dark flat roof.
2. identifying a physical quantity, as an indicator, and a calculation methodology.
The indicator chosen to estimate the index “rate” is the thermal energy absorption of each surface of the lot, due to the incident solar radiation.
The absorption of thermal energy of a surface represents the amount of energy
that that area is not able to reflect and disperse instantaneously, and therefore
represents the amount of thermal energy that will be released for a certain period
of time. The absorption of thermal energy is therefore able to highlight the capacity of a material to affect the Urban Heat Island.
In order to calculate the absorption of thermal energy a formula is used, which
correlates the technical and physical characteristics of a surface with the incident
solar radiation.
The technical and physical features used for the calculation of a generic surface, are: solar reflectance, emissivity and thermal resistance.
The index “RATE” calculates the sum of the absorption of thermal energy of
all surfaces that constitute the urban lot.
3. analysing the technical and physical features of every surface in the list and of
the existing context, to estimate the indicator. For each of the 20 types of interventions, the respective values of solar reflectance, emissivity and thermal resistance have been estimated. As for walls and roof, different values of thermal
resistance have been calculated, depending on the year of construction.
To quantify the incident solar radiation, the values defined by the norm UNI
10349 are used. Municipality of Modena has obtained a value to be applied on
the roof and different values to be applied to the walls, depending on their orientation. Regarding courtyard areas, an average value was estimated, taking into
account the loss of energy caused by the shading by building volume.
4. adopting the typical/needed approximations of urban indexes.
The Artisan Village Guidelines “Feasibility study of environmental quality
indexes to be applied to building lots”, made by Municipality of Modena, are
attached in Appendix C and the link to the calculation software can be found on the
website of the Municipality of Modena:
http://www.comune.modena.it/laboratoriocitta/laboratoriocitta/pubblicazionieventi/villaggio-artigiano-di-modena-ovest/esiti-del-progetto
and on the website of the Emilia-Romagna Region:
http://territorio.regione.emilia-romagna.it/programmazione-territoriale
6 UHI in the Metropolitan Cluster of Bologna-Modena...