Maximisation of building solar potential determined using Radiance

Maximisation of building solar potential determined using Radiance

• Previous work / Motivation• Methodology• Results• Conclusion

Solar Energy and Buildings Physics Laboratory (LESO-PB)Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne

Jérôme H. KAEMPF

[email protected]

mailto:[email protected]

• Renewable Energy potential of urban sites

– Compagnon (2000)• Radiance, PPF - histogrammes

– Robinson (2004)• Cumulative sky

– Montavon (2006)• La Ville Radieuse (Le Corbusier)

– Cheng (2006)• Parametric study (18)

Previous work / Motivation

Solar Energy and Buildings Physics Laboratory (LESO-PB)Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne

Methodology

sup{ ( ) | }nf x x M

nx M

Laboratoire d’Energie Solaire et de Physique du Bâtiment (LESO-PB)Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Suisse

Ambient calculation

–ab 2 –ad 1024 –as 512 –aa 0

Parametrisation of the form

Maximisation

sup{ ( ) | }nf x x M

Using Evolutionary Algorithms

First study


Parameterisation

Irradiation deduced by the steady-state thermal losses

CISBAT’07 proceedings

Second study


Irradiation deduced by the steady-state thermal losses BUTtaking the volume of the urban form as second objective

0

5000

10000

15000

20000

25000

30000

35000

40000

45000

7e+08 8e+08 9e+08 1e+09 1.1e+09 1.2e+09 1.3e+09 1.4e+09 1.5e+09 1.6e+09

Vo

lum

e (

m3 )

Irradiation deduced by thermal losses (Wh)

Terraces Flat Roofs

Pareto Front (compromise)

Results to appear in:Special Issue Solar Energyafter CISBAT

Second study


Irradiation deduced by the steady-state thermal losses BUTtaking the volume of the urban form as second objective

5000

10000

15000

20000

25000

30000

35000

40000

8e+08 9e+08 1e+09 1.1e+09 1.2e+09 1.3e+09 1.4e+09 1.5e+09 1.6e+09

Vo

lum

e (

m3 )


0

10000

20000

30000

40000

50000

60000

70000

1.1e+09 1.2e+09 1.3e+09 1.4e+09 1.5e+09 1.6e+09 1.7e+09 1.8e+09 1.9e+09

Vo

lum

e (

m3 )


Slabs Sloped Roofs Terrace Courts

Third study


Placement of buildings on a ground

Self-constrained problem→ shadowing effect

Using a hybrid CMA-ES/HDE

Appearing in:Applied Soft Computing

Fourth study


60m

40m

20m

Heights parameterisation

Volume constraints

Within 10% of half the maximum

Fifth study


Heights parameterisation

Constraints: Convex shape

Sixth study

2 2

2 0

( , ) cos 2 sin 2kl klk l x y x y

x y x yh x y A B

L L L L

25 parameters


Fourier series

, [ 2, 2]kl klA B , [ 1,1]kl klA B

, [ 0.5,0.5]kl klA B


Conclusion

Thank you for your attention!

Jérôme H. KAEMPF

[email protected]

RADIANCE is as very convenient tool for research:

Linux command line operations are very efficient

To speed up calculations, evaluations were parallelised

mailto:[email protected]

Maximisation of building solar potential determined using Radiance

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