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?
ReferencesCIE.(2018).CIESystemforMetrologyofOpticalRadiationforipRGC-InfluencedResponsestoLight(CIES026/E:2018).In.CIECentralBureau,Vienna,Austria:Commissioninternationaledel'éclairage.CIE.(2019).Positionstatementonnon-visualeffectsoflight-recommendingproperlightatthepropertime,2ndedition(october3,2019).RetrievedfromCIECentralBureau,Vienna,Austria:http://www.cie.co.at/publications/international-standardsDai,Q.,Huang,Y.,Hao,L.,Lin,Y.,&Chen,K.(2018).Spatialandspectralilluminationdesignforenergy-efficientcircadianlighting.BuildingandEnvironment,146,216-225.DiLaura,D.L.,Houser,K.W.,Mistrick,R.G.,&Steffy,G.R.(2011).Thelightinghandbook:Referenceandapplication.In.InternationalWELLBuildingInstitute.(2018).TheWELLBuildingStandard.Retrievedfromhttps://standard.wellcertified.com/light?_ga=2.241746050.1229333943.1550342931-788470800.1550342931Jung,B.Y.(2017).MeasuringcircadianlightthroughHighDynamicRange(HDR)photography.(MasterofScienceinArchitecture),UniversityofWashington,Washington.Jung,B.Y.,&Inanici,M.(2019).Measuringcircadianlightingthroughhighdynamicrangephotography.51(5),742-763.doi:10.1177/1477153518792597Konis,K.(2017).Anovelcircadiandaylightmetricforbuildingdesignandevaluation.BuildingandEnvironment,113,22-38.Lucas,R.J.,Peirson,S.N.,Berson,D.M.,Brown,T.M.,Cooper,H.M.,Czeisler,C.A.,...O’Hagan,J.B.(2014).Measuringandusinglightinthemelanopsinage.Trendsinneurosciences,37(1),1-9.NRC.(2015).NationalEnergyCodeofCanadaforBuildings(NECB).In.Ottawa,Canada:NationalResearchCouncilofCanada.Parsaee,M.,Demers,C.M.,Hébert,M.,Lalonde,J.-F.,&Potvin,A.(2019).Aphotobiologicalapproachtobiophilicdesigninextremeclimates.BuildingandEnvironment,154,211-226.doi:https://doi.org/10.1016/j.buildenv.2019.03.027Rea,M.S.,&Figueiro,M.G.(2016).Lightasacircadianstimulusforarchitecturallighting.LightingResearch&Technology,1-14.doi:https://doi.org/10.1177/1477153516682368Wearherspark.(2018).TheTypicalWeatherAnywhereonEarth.
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