Presentation of my new Approach to Solar and Sustainable Urban Planning @ Energy Forum 2013

1. Energy Forum 2013
Conference on Advanced building skins
6th November 2013, Bressanone (Italy)
Solar potential in urban areas:
A new approach to solar and sustainable urban planning
Gabriele Lobaccaro
Postdoctoral Research Fellow

2. Outlines
Introduction
Open 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 study
Applicability and the results in the use of the methods and tools for solar design
Development a new urban design & simulation tool
A beta version of urban design and analysis tool controlled by devices
Conclusion

3. European directive on the energy
performance of buildings (EPBD)
20-20-20 plan - EU-27 2020:
In Europe the buildings produce:
36% emissions CO2
40% energy consumptions
Renewable Energy Sources

4. The cities are responsible for…
75%
Energy consumed
80%
Emissions

5. …why not using the façades for producing the energy

6. From Urban sprawl…
Rio de janeiro

7. To Dense Urban City
Masdar City

8. IEA - SHC International research activities
The total solar energy
absorbed from the earth is equal:
3,850,000 EJ
The use of primary energy
in 2009 was equal to:
510 EJ
Electricity:
62EJ
Energy Unused

9. IEA - SHC International research activities
May 2013 - Apr 2017
http://task41.iea-shc.org/
May 2009 - Apr 2012
http://task51.iea-shc.org//

10. IEA Task 41 “Solar Energy and Architecture”
CAAD
Tools
Autocad
Google SketchUp
Revit Architecture
Archicad
Vectorworks
Simulation
Tools
Ecotect
RETScreen
Radiance
Polysun
PVsyst
Conceptual phase
28%
25%
10%
10%
5%
Preliminary design
phase
35%
16%
12%
11%
6%
Detailed design
phase
45%
8%
14%
12%
7%
Construction
drawings phase
50%
5%
13%
13%
8%
Conceptual
phase
26%
16%
8%
7%
8%
Preliminary design
phase
33%
12%
9%
8%
4%
Detailed design
phase
22%
7%
10%
12%
7%
Construction
drawings phase
19%
5%
9%
19%
9%

11. Objectives of the research
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

12. Methodology of the solar optimization process
Applicability and the results in the use of the methods and tools for solar design

13. Case study - Milan (Italy)
Source: Google Earth
Initial Scenario
?
Current Design Scenario
Does exist a solar optimized scenario
maintaining the constant volume

14. Generative parametric solar optimization process

15. Generative parametric solar optimization process

16. Solar irradiation simulations – Building A isolated
Irrg = 2,881,181 kWh/yr
+ 18%

17. Solar irradiation simulations – Building B isolated
Irrg = 1,270,337 kWh/yr
+ 22%

18. Solar irradiation simulations - District analyses
Considering the surrounding (mutual reflections)
A
A
B
B
Design Scenario
+ 12%
- 8%
Solar optimized design scenario
Building A
Building B
(compared to the isolated volume)
+ 36%
+ 27%

19. Development a new urban design & simulation tool
A beta version of urban design and analysis tool controlled by devices

20. Conclusion
METHOD
A New Urban Planning approach for planners, architects and engineers
UTILITY
Use of the tool for supporting design decisions during the early design phases
ANALYSES
Holistic design approach for sustainable and integrated design

21. Gabriele Lobaccaro
NTNU - Norwegian of Science and Technology
gabriele.lobaccaro@ntnu.no