Healthandwell-beingresponsestodaylightinginnorthernbuildings

Presentingby

MojtabaParsaeePhDcandidateinArchitecture

SchoolofArchitecture,LavalUniversity

Supervisors:ClaudeDemers(Architecture)

MarcHébert(Biology)Jean-FrançoisLalonde(ComputerEngineering)

AndréPotvin(Architecture)

NorthernCanada(50°N)People Building

Daylightingdesign&performance

Light-relatedhealth&wellbeing

ClimateStrongday/nightcycles

(photoperiods)

Questions•  HowdoNorthernbuildingsrespondtotheclimateandpeople’s

light-relatedneeds?•  Whatarethepotentialhealthandwellbeingresponsesof

occupantstodaylightinginsideNorthernbuildings?

Developthedaylightingdesignofnorthernbuildingsforoccupants’healthandwellbeing

Objective

• Photobiology

• Psychology

• Biophilicdesign

Non-imageformingeffectsCircadian rhythms

Alertness Performance

Mood

Light-relatedHealth&wellbeing

ImageformingeffectsVision

Visual comfort

View/connectivitytonature&naturalcycles

Psychological & physiological effects

Referto:(CIE,2018,2019;Dai,Huang,Hao,Lin,&Chen,2018;DiLaura,Houser,Mistrick,&Steffy,2011;InternationalWELLBuildingInstitute,2018;Jung,2017;Jung&Inanici,2019;Konis,2017;Lucasetal.,2014;Parsaee,Demers,Hébert,Lalonde,&Potvin,2019;Rea&Figueiro,2016)

Day

Night

Non-imageformingeffects

ProperLightatProperTimeCIE(October3,2019),Positionstatementonnon-visualeffectsoflight

•  Lightingstandardsandpracticeoftenfocusonimageforming(visual)andenergyefficiencyaspectsoflight,withlittleornoconsiderationof

non-imageformingresponses

Light-relatedHealth&wellbeing

• Animproperbalancebetweentheseaspectscancompromisehumanwell-being,healthandfunctioningrelatedtolightingambiance.

Light-relatedHealth&wellbeing

• Manylightingproducts,especiallyLEDsystems,areavailableinthemarketthatareaimedtoaffectnon-imageformingaspects.

Light-relatedHealth&wellbeing

Don’tunnecessarilydecreaseorrestrictavailabilityandaccessibilitytodaylightand

outdoornatureinsidebuildings.CIE(October3,2019),Positionstatementonnon-visualeffectsoflight

Verylowwindow-to-wallratio(WWR)recommendedbyNationalEnergyCodeofCanadaforBuildings(NECB)

ChallengingconditionsinNorthernCanada

Referto(NRC,2015)

NorthernCanada’sClimate

NorthernCanada’sClimate

CambridgeBay[69°N]

CambridgeBay[69°N]

NorthernCanada’sClimate

•  Strongphotoperiods(Day/nightcycles)

•  Extremecoldweather

Publishedby(Wearherspark,2018)

NorthernCanada’sClimatelightingfeaturesCambridgeBay[69°N]

Photoperiod Solarelevation

NorthernBuildingsmostoftenbeendesignedwithlowWWR’storespondtothermalissues

NorthernBuildingsmostoftenbeendesignedwithlowWWR’storespondtothermalissues

NorthernBuildingsmostoftenbeendesignedwithlowWWR’storespondtothermalissues

NorthernBuildingssomefewcases,suchasairports,haveveryhighWWR’s

NorthernBuildingssomefewcases,suchasairports,haveveryhighWWR’s

NorthernBuildingssomefewcases,suchasairports,haveveryhighWWR’s

ObservationOpeningsaremostlycoveredbyblindsinsunnyandcloudydays

DaylightfactorinatypicalspacerecommendedforNorthernCanadaWWR=20%

Experimentalset-up

Models(n=18)Scale1:50

MeasurementRaspberryPifisheyecamera

HDRimagery

ParameterHealth&wellbeing

Distribution

Colortemperature

Experimentalset-up

Outdoorlighting MeasurementEvery15minutes

ParameterHealth&wellbeing

Photopiclux

EquivalentMelanopiclux

Colortemperature

CIEChromaticity

KonicaCL-200AChromaMeter

IL5000ResearchRadiometer

QuebecCity11:15am-12:45pmSeptember18,2019Southdirection

SunnyCloudcover=0

ModelsScale1:50

Variables:• WWR(from10%to80%)•  Formofopenings•  Simpleshadings/reflectorswithdifferent

•  Color(bluefornon-imageformingeffects,Redforimageformingeffects)

•  Opaque/Transparent(blue/red)•  Orientation(vertical/horizontal)

AnalysisHealthandwellbeingresponses

AnalysisHealthandwellbeingresponses

AnalysisHealthandwellbeingresponses

AnalysisHealthandwellbeingresponses

AnalysisHealthandwellbeingresponses

0

1000

2000

3000

4000

5000

6000

7000

8000

0 10002000300040005000600070008000

BackView

SideView

PL EML CCT

86900 87340 87290 86150 87120 85790 84530

92340 95860 92980 97500 92320 94850 94190

5211 5224 5262 5284 5287 5295 5311

1000

10000

100000

11:15:00 AM

11:30:00 AM

11:45:00 AM

12:00:00 PM

12:15:00 PM

12:30:00 PM

12:45:00 PM

Time PL EML CCT

OutdoorconditionIndoorcondition

Conclusion&futurestudies• PhotobiologicalandbiophiliclightingrequirementsmustbeconsideredinbuildingdesignandrecommendationsforNorthernCanada.

• AlowWWRcouldnotprovideahealthyindoorlightingenvironmentforNorthernoccupants.

• AvailabilityofdaylightingandaccessibilitytooutdoornatureandnaturalcyclesarecompromisedbyalowWWR.

• AhighWWRcouldimprovephotobiologicalandbiophilicaspectsofindoorlighting.However,itwillcauseseriousthermalandenergyissues.

•  Theuseofopaque/transparentreflectorscouldimproveindoorlightingwhichmustbedevelopedandoptimizedforNorthernCanada.

Conclusion&futurestudies• PhotobiologicalandbiophiliclightingrequirementsmustbeconsideredinbuildingdesignandrecommendationsforNorthernCanada.

• Adaptiveandhigh-performancefaçadesystemscouldbedevelopedtodealwiththeissuesandprovidenorthernoccupantsahealthyenvironment.

•  Lightingadaptationscenariosmustbedevelopedtorespondtoindividual’slightingneedsandlocalphotoperiods.

• Anintegratedapproachmustbedevelopedtoassessphotobiologicalandbiophilicaspectsoflightinthespace.

Thankyouforyourattention!Anyquestion?

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