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Back  |  Home  >  Daylight illuminance in Italy  >  Maps

 

Maps of daylight illuminance in Italy

 

The natural light plays a crucial role on the energy and environmental performances of buildings.

The energy need for electric lighting in European buildings, is currently calculated according to the procedure defined in EN15193:2007, but a critical aspect to evaluate the energy saving potential of lighting is the assessment of the daylight contribution.

Climate-based daylight modelling (CBDM) can provide better support for buildings applications, but require a large dataset of daylight data for different zone.

The extensive work, carried out by ENEA, has allowed to build daylight maps for the entire Italian territory. The illuminance values were calculated starting from the solar radiation data, applying a model for luminous efficacy developed in ENEA.

 

Maps of global horizontal illuminance in Italy. Monthly average values (time profile 8:00÷18:00):

January February March April May June
January February March April May June
July August September October November December
July August September October November December

 

Maps of diffuse horizontal illuminance in Italy. Monthly average values (time profile 8:00÷18:00):

January February March April May June
January February March April May June
July August September October November December
July August September October November December

 

Map of global horizontal illuminance in Italy. Annual average values (time profile 8:00÷18:00):

annual annual
(italian) (english)

 

Map of diffuse horizontal illuminance in Italy. Annual average values (time profile 8:00÷18:00):

annual

 

Map of global horizontal illuminance in Italy. Animate GIF image of monthly average values (time profile 8:00÷18:00):

annual

 

Map of global horizontal illuminance in Italy. Overall image of monthly average values (time profile 8:00÷18:00):

annual

 

Translation of Italian terms in the maps:

Italia Italy
Carta dell’illuminamento naturale Daylight Illuminance Map
(Illuminamento) Globale orizzontale Global Horizontal (Illuminance)
(Illuminamento) Diffuso orizzontale Diffuse Horizontal (Illuminance)
Mese Month
Anno Year
Intervallo orario Time profile
Media annua Yearly average
Gennaio January
Febbraio February
Marzo March
Aprile April
Maggio May
Giugno June
Luglio July
Agosto August
Settembre September
Ottobre October
Novembre November
Dicembre December

 

References

F. Spinelli, D. Iatauro, P. Signoretti, L. Terrinoni e M. Zinzi (2017), “Analysys of Daylight Availability in Italy trough Different Louminous Efficacy Models”, International Conference on Solar Heating and Cooling for Buildings and Industry – SHC 2017, Abu Dhabi, October 2017.

F. Spinelli, D. Iatauro, P. Signoretti, L. Terrinoni e M. Zinzi (2019), “Development of Daylight Availability Maps in Italy: methodology and validation”, International Conference on Solar Heating and Cooling for Buildings and Industry – SHC 2019, Santiago, Chile, November 2019.

F. Spinelli, L. Terrinoni, M. Zinzi, D. Iatauro e P. Signoretti (2015), Costruzione degli Anni tipici per l’illuminamento naturale (AMTIN) per il territorio nazionale e delle curve di disponibilità di luce naturale per la stima del fabbisogno di energia elettrica per l’illuminazione artificiale negli edifici, Rapporto ENEA - Ricerca di Sistema Elettrico, Roma, settembre 2015, RdS/PAR2014/085.

F. Spinelli, L. Terrinoni, M. Zinzi, D. Iatauro e P. Signoretti (2016), Definizione di un modello nazionale di efficacia luminosa mediante la misura dei valori di illuminamento naturale e di radiazione solare in tre località italiane, Rapporto ENEA - Ricerca di Sistema Elettrico, Roma, settembre 2016, RdS/PAR2015/124.

F. Spinelli, L. Terrinoni, M. Zinzi, D. Iatauro e P. Signoretti (2017), L’atlante italiano dell’illuminamento naturale. Mappatura del territorio nazionale con la redazione dell’anno tipico per 243 località, Rapporto ENEA - Ricerca di Sistema Elettrico, Roma, settembre 2017, RdS/PAR2016/257.

F. Spinelli, L. Terrinoni, M. Zinzi, D. Iatauro e P. Signoretti (2018), L’atlante italiano dell’illuminamento naturale. Produzione delle mappe d’illuminamento per differenti orari d’uso degli ambienti e ampliamento del sito Solaritaly dell’ENEA con la realizzazione d’una nuova sezione dedicata ai dati dell’illuminamento naturale, Rapporto ENEA – Ricerca di Sistema Elettrico, Roma, settembre 2018, RdS/PAR2017/139.

F. Spinelli e D. Iatauro (2018), Metodi geostatistici per l'elaborazione delle mappe di illuminamento naturale per il territorio italiano, Rapporto ENEA – Ricerca di Sistema Elettrico, Roma, dicembre 2018, RdS/PAR2018/045.

 

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