daylight design and research activities...2015/10/23 · daylighting design and research activities...

Daylighting design and research activities supported by RADIANCE David Geisler-Moroder, Bartenbach GmbH / DIVA Day 2015, 23.10.2015, London

Daylight design and research activities

supported by Radiance simulations


„Light harvester“



transmission

reflection



CIE clear sky, 21.6., noon, Innsbruck



cDA500lx, 8-18h

L0 63%

L1 57%

L2 61%

L3 73%

based on annual

climate data for

Innsbruck, Austria annual demand for artificial lighting: 12.7 kWh/m2

(based on 12.5 W/m2 and 2.5 W/m2 connected power for office and corridor spaces)


Integrated Day- and Artificial Light

1

23

4

daylight sensor

artificial light

daylight system

HVAC

calculation points



user

profile

target

daylight module

artificial light

module

energy module

temp.e

ffic

ien

cy

ch

eck

DL: setting

AL: intensity

AL: CCT

AL: balance

software module

set

DLM



input for control: adapted daylight coefficient approach

daylight

system

calculation points

• Klems BSDF for daylighting system

• Reinhart sky subdivision (2305)

3-phase-DC method

for each system position (tilt angle):

1 DC for sky (upper quarter-sphere)

1 DC for ground (lower quarter-sphere)

1387 DCs for sun (façade-based

Cartesian grid 5°/5°)


DALEC Online Tool


DALEC Online Tool

location &

data moduledaylight module

artificial light

modulethermal module

energy demand

heating + cooling + lighting [W]

exterior illuminance [lx]

interior daylight

level [lx]

artificial light demand [W]

radiation [W]

exterior

temperature [°C]

occupant

& control

module


DALEC Online Tool

Daylight coefficient approach

• 1 factor for diffuse sky

• 145 sun factors (Tregenza / CIE 108-1994)

Time step evaluation

Emeasurement point = fD * Eh, diffuse + f‘S*Eh, direct

f‘D factor for diffuse sky

Eh,diffuse diffuse illuminance from weather data

f‘S sun factor for current sun position

Eh,direct direct illuminance from weather data

fD = Emeasurement point / Eh, exterior, diffuse sky

fiS = Emeasurement point / Eh, exterior, sun position i

for i = 1, … ,145


DALEC Online ToolValidation

Comparison measurement vs. DALEC simulation

• Monitoring in course of research project „Integrated Day- and Artificial Light“

• Illuminance calculation with DALEC based on measured exterior levels

00:00 06:00 12:00 18:00 00:000

200

400

600

800

1000

1200

1400

1600

1800

2000

Time

Illu

min

ance [

lx]

DALEC

Measurement

cloudy sky

clear sky

00:00 06:00 12:00 18:00 00:000

500

1000

1500

2000

2500

3000

3500

4000

4500

Time

Illu

min

ance [

lx]

DALEC

Measurement


DALEC Online Toolwww.dalec.net

http://www.dalec.net/


Science TowerGraz, Austria



𝐷𝐹 % =𝑖𝑛𝑡𝑒𝑟𝑖𝑜𝑟 𝑖𝑙𝑙𝑢𝑚𝑖𝑛𝑎𝑛𝑐𝑒

𝑒𝑥𝑡𝑒𝑟𝑖𝑜𝑟 𝑢𝑛𝑜𝑏𝑠𝑡𝑟𝑢𝑐𝑡𝑒𝑑 ℎ𝑜𝑟𝑖𝑧𝑜𝑛𝑡𝑎𝑙 𝑖𝑙𝑙𝑢𝑚𝑖𝑛𝑎𝑛𝑐𝑒∗ 100

DF



𝐴𝑆𝐸1000𝑙 𝑥 250ℎ % =𝑎𝑟𝑒𝑎 𝑜𝑓 𝑡𝑎𝑟𝑔𝑒𝑡 𝑝𝑙𝑎𝑛𝑒 𝑤𝑖𝑡ℎ 𝑖𝑙𝑙𝑢𝑚𝑖𝑛𝑎𝑛𝑐𝑒 𝑓𝑟𝑜𝑚 𝑠𝑢𝑛 ≥ 1000𝑙𝑥 𝑓𝑜𝑟 ≥ 250ℎ

𝑡𝑜𝑡𝑎𝑙 𝑡𝑎𝑟𝑔𝑒𝑡 𝑎𝑟𝑒𝑎∗ 100

sDA300lx/50% = 68%

ASE1000lx/250h = 21%

𝐷𝐴300𝑙𝑥 % =𝑤𝑜𝑟𝑘𝑖𝑛𝑔 ℎ𝑜𝑢𝑟𝑠 𝑤𝑖𝑡ℎ 𝑑𝑎𝑦𝑙𝑖𝑔ℎ𝑡 𝑖𝑙𝑙𝑢𝑚𝑖𝑛𝑎𝑛𝑐𝑒 ≥ 300𝑙𝑥

𝑡𝑜𝑡𝑎𝑙 𝑤𝑜𝑟𝑘𝑖𝑛𝑔 ℎ𝑜𝑢𝑟𝑠∗ 100

𝑠𝐷𝐴300𝑙 𝑥 50% % =𝑎𝑟𝑒𝑎 𝑜𝑓 𝑡𝑎𝑟𝑔𝑒𝑡 𝑝𝑙𝑎𝑛𝑒 𝑤𝑖𝑡ℎ 𝐷𝐴 ≥ 50%

𝑡𝑜𝑡𝑎𝑙 𝑡𝑎𝑟𝑔𝑒𝑡 𝑎𝑟𝑒𝑎∗ 100



VP2


Lichtwelt „inspire“ @ BartenbachAldrans, Austria



Validation of new photon mapping extension with classic RADIANCE

Ph

oto

n M

ap

pin

gcla

ssic

RA

DIA

NC

E



Validation of new photon mapping extension with classic RADIANCE

Photon Mapping

classic RADIANCE „ground truth“ (rtrace -I -aa 0 -ab 9 -ad 20000 -lw 1e-12 -lr -20)



Light tube without

Fresnel structure

sky condition:

CIE clear sky

Aldrans/Austria

June 21, 13:00 CEST

???



Light tube without

Fresnel structure

sky condition:

CIE clear sky

Aldrans/Austria

June 21, 13:00 CEST

geometry

export!



Light tube without

Fresnel structure

sky condition:

CIE clear sky

Aldrans/Austria

June 21, 13:00 CEST

trying the same with

classic RADIANCE

Photon Mapping



sky condition:

CIE clear sky

Aldrans/Austria

June 21, 13:00 CEST

Light tube with

diffuser and

Fresnel structure


SC FischaparkWiener Neustadt, Austria



Glazing Venetian blind Redirecting blind

VB + control RB + control

*75% / #41% *28% / #0% *65% / #0%

*63% / #--% *74% / #--%

DA

(o

pera

tin

gh

ou

rsw

ith

E >

30

0lx

[%

])

*sDA300,50[%]#ASE1000,250h[%]acc. IES LM-83-12


Garmisch-Partenkirchen Medical CenterGarmisch, Germany


Q&A

Thank you for your attention!

Questions?

David Geisler-MoroderBartenbach GmbH

[email protected]

mailto:[email protected]

http://www.bartenbach.com/

daylight design and research activities...2015/10/23 · daylighting design and research activities...

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