solar potential in urban areas: a new approach to solar and sustainable urban planning
TRANSCRIPT
Solar potential in urban areas: A new approach to solar and sustainable urban planning
Energy Forum 2013Conference on Advanced building skins6th November 2013, Bressanone (Italy)
Gabriele LobaccaroPostdoctoral Research Fellow
IntroductionOpen questions and objectives
IEA Task 41 “Solar Energy and Architecture” Aims and results of the research conducted in Subtask B
Theory, calculation and results on the case studyApplicability and the results in the use of the methods and tools for solar design
Development a new urban design & simulation toolA beta version of urban design and analysis tool controlled by devices
Conclusion
Outlines
European directive on the energy performance of buildings (EPBD)
Renewable Energy Sources
20-20-20 plan - EU-27 2020:
In Europe the buildings produce:
36% emissions CO 2
40% energy consumptions
The cities are responsible for…
75%75% Energy consumedEnergy consumed
Emissions Emissions 80%80%
…why not using the façades for producing the energy
From Urban sprawl…
Rio de janeiro
Masdar City
To Dense Urban City
IEA - SHC International research activities
The total solar energy absorbed from the earth is equal:
3,850,000 EJ
The use of primary energyin 2009 was equal to:
510 EJ
Electricity:
62EJ
Energy Unused
IEA - SHC International research activities
http://task41.iea-shc.org/
http://task51.iea-shc.org//
May 2013 - Apr 2017
May 2009 - Apr 2012
IEA Task 41 “Solar Energy and Architecture”
CAAD Tools
Conceptual phase Preliminary design phase
Detailed design phase
Construction drawings phase
Autocad 28% 35% 45% 50%Google SketchUp 25% 16% 8% 5%Revit Architecture 10% 12% 14% 13%
Archicad 10% 11% 12% 13%
Vectorworks 5% 6% 7% 8%
Simulation Tools
Conceptual phase
Preliminary design phase
Detailed design phase
Construction drawings phase
Ecotect 26% 33% 22% 19%RETScreen 16% 12% 7% 5%Radiance 8% 9% 10% 9%Polysun 7% 8% 12% 19%PVsyst 8% 4% 7% 9%
1 – Solar optimization process of the building shape
2 – Solar optimized design: evaluation of solar irradiation in the isolated scenario
3 – Validation of the process: evaluation of solar irradiation in the district analysis
Objectives of the research
Methodology of the solar optimization processApplicability and the results in the use of the methods and tools for solar design
Initial Scenario Current Design Scenario
Does exist a solar optimized scenario maintaining the constant volume
?
Source: Google Earth
Case study - Milan (Italy)
Generative parametric solar optimization process
Generative parametric solar optimization process
Solar irradiation simulations – Building A isolated
Irrg = 2,881,181 kWh/yr
+ 18%
Solar irradiation simulations – Building B isolated
Irrg = 1,270,337 kWh/yr
+ 22%
Design Scenario Solar optimized design scenario
+ 12%
- 8%
Building A
Building B
(compared to the isolated volume)
+ 36%+ 27%
A
B
A
B
Solar irradiation simulations - District analysesConsidering the surrounding (mutual reflections)
Development a new urban design & simulation toolA beta version of urban design and analysis tool controlled by devices
METHODA New Urban Planning approach for planners, architects and engineers
UTILITYUse of the tool for supporting design decisions during the early design phases
ANALYSESHolistic design approach for sustainable and integrated design
Conclusion
