Daylight Design From the Architects Perspective

8/18/2019 Daylight Design From the Architects Perspective

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Daylight Design

from the Architect's Perspective

Dr. Axel Jacobs London Metropolitan University

Joint meeting C!"# Daylight $ro%pC!"# !%ilding "im%lation $ro%p

&

st

December (&(


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Structure

&. Daylighting ) design vs verification

. *he design process

+. *ools available

,. #d%cate or prescribe-


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Le Corbusier

Architect%re is themasterly/ correct/ andmagnificent play of

vol%mes bro%ght togetherin light.

*he history ofarchitect%re is the history

of the str%ggle for light.0

Le Corb%sier


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Design vs Verification


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Building Design


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Design Challenge

Many engineering tas1s 2ithin the b%ildingdesign process can 2ait %ntil a relatively latestage 3elec/ 45AC/ fire/ lighting6

Daylighting m%st be considered from the veryonset.

7ne ho%r of yo%r time right at the beginning canma1e all the difference bet2een good and baddaylighting.

8ixing poor daylighting at a late stage is notpossible.


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Design Team


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Non-linear Requirements...

... architect%ral modeling/ partic%larly at the earlystages of design/ represents one of the mostdiffic%lt challenges for the interactive graphicssoft2are ind%stry. C%rrently/ available

architect%ral design soft2are is diffic%lt to %se atthe preliminary design phase. ... 9hat is neededis a :bac1;of;the;envelope< environment/ 2ith theability to s1etch/ doodle/ and erase/ to proceed inan iterative/ non;linear fashion/ and to performthese operations in a f%ll three;dimensionaldomain.0

D.P. $reenberg= Architect%ral Design/ *echnology for ed%cation (((

http://www.cs.cornell.edu/Tech2000/design1.htmhttp://www.cs.cornell.edu/Tech2000/design1.htm


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But Linear Solutions

ntegrated/ iterativedesign process re>%iresappropriate soft2aretools

?es/ there are formatss%ch as gb@ML/ b%t inreality=

Comp%ter idedDesign Dra2ing


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Research

"imon 8raser University/ !%rnaby/ Canada=

Sketch-Based Architectural Design System

... o%r proposedframe2or1 disting%ishesitself from existingsystems 2ith its simplicityand close conformation tothe design habits ofarchitects.0

?% and hang/ ((B


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!ore Research

M* Daylighting Lab=

*he Lightsolve proect see1sto develop ne2 approachesin daylight sim%lation and fillsome critical gaps fo%nd inthe tools available no2adaysto architects. "pecificallyaimed at the early stages of a

b%ilding design/ it 2ill helpdevelop a form based on bothaesthetical and technicalindications of the desiredperformance.0


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!eans to an "nd

Calc%lations are not an end in themselves. *heirp%rpose is to help the designer to choosebet2een alternatives or to chec1 2hether a

partic%lar sol%tion meets a criterion. *hey are asmall part of the 2hole design process ) and aidto creativity in lighting/ not s%bstit%te.0

*regena E Loe= The design of lighting / &FFG


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Design Tools

All compliance criteria are also design tools=

5ertical "1y Component/ 5"C

Average D8

"%npath diagrams

"%nlight Availability

Hoom depth Io;s1y line


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Vertical S#$ Com%onent

#arly design stage= 4o2 m%ch nat%ral light isavailable at the 2indo2-

*raditionally= Diagram

H%le of th%mb= K;r%le

Comp%ter=

&(/((( lx overcast s1y

#xternal vertical ill%minance

7bstr%ctions and gro%nd are blac1


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verage D&

Level of daylight in a room

*raditionally=!H# form%la

Comp%ter=f%ll;blo2n sim%lation


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Sun%ath Diagrams

"imple solar geometry

%ic1 assessment of shading re>%irements

*raditionally= Diagrams

Comp%ter= Hendering2ith overlay


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'robable Sunlight (ours

Climate;based metric/based on historic2eather data

Assess s%nlight as anamenity

*raditionally= Diagram2ith dot;overlay

Comp%ter= Henderfisheye vie2/ co%ntdots


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)la*ing rea

Different r%les of th%mb=

$laing;to;2all ratio

$laing;to;facade ratio

$laing;to;floor ratio

e.g. $P$,=

&th of total room area

Dead;easy for a comp%terto s%m %p


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Room De%th

Daylight from 2indo2s only possible in the perimeterone of the b%ilding

!H# room depth criterion=

H%le of th%mb=

9ho needs a comp%ter for this-


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Design Tool Requirements

"imple/ int%itive interface

*2o modes=

Calc%lation

H%les of th%mb/ simple calcs

nstant feedbac1= *raffic lights/ ga%ges

"im%lation

More acc%rate res%lts

$raphs/ n%mbers

#xport model to CAD/ f%ll sim%lation pac1ages


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+,-Solutions

9e need simple tools that help 2ith theinteractive design of good b%ildings for FN ofcases

C%rrent soft2are tools are designed to sit at thevery end of the design process/ only allo2ingfor verification of the design

*he gap bet2een architect%ral design andengineering sol%tions needs to be narro2ed/not 2idened.


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"ducational vs 'rescri%tive %%roach

#d%cate

Haise a2areness

#nco%rage gooddaylighting

"ho2 ho2 it's done Provide the tools

Prescribe

#nforce thro%ghb%ilding regs

*ic1;box approach to

compliance M%st;do/ li1e paying

taxes

Daylighting


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illiam illett vs Der /aiser

S


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Summer Time

9illiam 9illett &F(B pamphlet

*he 9aste of Daylight0

Parliamentary select committee in&F(F= Daylight "avings !ill

M%ch lobbying/ ed%cating

!ill passed in &F&O="%mmer *ime Act

aiser 9ilhelm &F&O= 9hat/ 2e'll save ho2 many

tonnes of C7 2ith this- Jollygood idea. hereby decree...0 Q

Q Probably not his act%al 2ords.

' t ( ill tt1


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'rost0 (err illett1

CC by;nc;nd

diamond geeer

' t L 2 4


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'art L 2no34

' t L 2 54


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'art L 2soon54

C li Ch i


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Com%liance Chasing

"d ti "d ti "d ti


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"ducation0 "ducation0 "ducation

Lighting Designers


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Lighting Designers

9e s%spect that architects had forgotten abo%tdaylight design. *he 2indo2s are decorationsRthere 2as no connection made bet2een daylightperformance and the elevation design. ... 4aving2or1ed 2ith a variety of different architects/ thisfoc%s on nat%ral light has strengthened o%r beliefthat it is an art becoming lost to architects. n fact/it seems that many architect%re co%rses don'tteach daylight as an element of their c%rric%l%manymore/ so it's no s%rprise that the s1ill is slo2lydisappearing.0

"tammers and L%pton in Lighting / Dec (&(

3areness 3areness 3areness


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3areness0 3areness0 3areness

*each daylighting on every co%rse ofarchitect%re and b%ilding;related engineering

Architect do not have to become daylighting

specialists/ b%t need to be a2are of the criticalimportance of daylight

Contemplations on daylighting sho%ld becomeintegral part of the creative design process/

right after 3or d%ring6 the scribble;on;a;nap1instage.

"ncouraging "6am%le


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"ncouraging "6am%le

!artlett "1y "im%lator Dome

7ther 8ncentives


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7ther 8ncentives

(ave $ou achieved ,5


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(ave $ou achieved ,5


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*han1 ?o%

Documents

Daylight Design From the Architects Perspective