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Environmental Controls I/IG. Lecture 18 Daylighting Design & Analysis Design Strategies Glazing and Reflectors Sidelighting Analysis Method. Daylighting Design & Analysis. Orientation and Slope. Vertical vs. Horizontal Time of year Sun position. DL-5 F. 10-1 p. 79. - PowerPoint PPT Presentation
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Environmental Controls I/IGEnvironmental Controls I/IG
Lecture 18Lecture 18Daylighting Design & AnalysisDaylighting Design & Analysis
Design StrategiesDesign Strategies
Glazing and ReflectorsGlazing and Reflectors
Sidelighting Analysis MethodSidelighting Analysis Method
Lecture 18Lecture 18Daylighting Design & AnalysisDaylighting Design & Analysis
Design StrategiesDesign Strategies
Glazing and ReflectorsGlazing and Reflectors
Sidelighting Analysis MethodSidelighting Analysis Method
Daylighting Daylighting Design & AnalysisDesign & Analysis
Orientation and SlopeOrientation and Slope
Vertical vs. Horizontal Time of yearSun position
DL-5 F. 10-1 p. 79
Daylighting ComponentsDaylighting Components
SC=Sun + SkyIRC1
IRC2ERC
S: F.14.18 p. 590
Daylighting Factor (DF)Daylighting Factor (DF)
The quantity of interior illuminance on a horizontal work plane expressed as a percentage of illuminance of an exterior unobstructed horizontal plane
DF (%) = (EINT/EEXT) x 100
Daylighting Factor (DF)Daylighting Factor (DF)
If EINT is 20 foot-candles
and EEXT is 1000 foot-candles,
then what is the daylighting factor?
DF(%)= (EINT/EEXT) x 100
DF (%)=(20/1000) x 100DF (%)=2.0%
Isolux ContoursIsolux Contours Lines of similar
lighting levels Expressed as DF
Darwin College Library, Cambridge, England
Isolux Contours ExampleIsolux Contours ExampleEEXT= 2000 fc
1: 20 fc2: 60 fc3: 100 fc4: 40 fc5: 80 fc6: 140 fc7: 20 fc8: 60 fc9: 100 fc
1+ 2+ 3+
4+ 5+ 6+
7+ 8+ 9+
DF(%)= (EINT/EEXT) x 100
Isolux Contours ExampleIsolux Contours ExampleEEXT= 2000 fc
1: 20 fc DF=1 %2: 60 fc DF=3 %3: 100 fc DF=5 %4: 40 fc DF=2 %5: 80 fc DF=4 %6: 140 fc DF=7 %7: 20 fc DF=1 %8: 60 fc DF=3 %9: 100 fc DF=5 %
1+ 2+ 3+
4+ 5+ 6+
7+ 8+ 9+
Isolux Contours ExampleIsolux Contours ExampleEEXT= 2000 fc
1: 20 fc DF=1 %2: 60 fc DF=3 %3: 100 fc DF=5 %4: 40 fc DF=2 %5: 80 fc DF=4 %6: 140 fc DF=7 %7: 20 fc DF=1 %8: 60 fc DF=3 %9: 100 fc DF=5 %
1 3 5
2 4 7
1 3 56
42
Isolux ContoursIsolux Contours Lines of similar
lighting levels Expressed as DF
Darwin College Library, Cambridge, England
Illumination Illumination GradientGradient
An illumination gradient through a section
Ludwig Museum, Koln, Germany
Design StrategiesDesign Strategies
Selection ParametersSelection Parameters
Daylight availabilityTask orientationSpace orientation
Daylighting GraphsDaylighting Graphs
10’ Ceiling30” Work plane
DL-5: F10-2 p. 80
South Facing WallsSouth Facing WallsSolid Overhang
a: translucent glazingb: horizontal overhangc: 30º sloped clear
glazingd: 45º sloped clear
glazing
DL-5: F10-5 p. 82
South Facing WallsSouth Facing WallsDiffusing Awnings
a: translucent glazingb: translucent awning
clear glazingc: white vertical
slatted awning, clear glazing
d: white, horizontal slatted awning, clear glazing
DL-5: F10-6 p. 82
Light ShelvesLight Shelves
W: With light shelfWO: Without light shelf
DL-5: F10-18 p. 89
Skylights Skylights
Effect of skylight above roofa: flat horizontalb: half-round barrel, white opaque endsc: steeply sloped A-frame, white opaque ends
DL-5: F10-21 p. 91Typographic Error In Reading
Roof Monitors Roof Monitors
North-South Monitors
a: translucent panelb: north monitor,
clear glazingc: south monitor,
translucent glazing
DL-5: F10-30 p. 95
Roof Monitors Roof Monitors
Sun Control
Baffles/LouversLight Wells
DL-5: F10-35 p. 97
Roof Monitors Roof Monitors
Graphic Design Approach
DL-5: F10-37 p. 98
Glazing & ReflectorsGlazing & Reflectors
Fenestration Fenestration
Window or Fenestration?
Clear Glazing Clear Glazing
Maximum VLT
DL-5: F11-1 p. 105
Gray/Bronze Gray/Bronze Glazing Glazing
Gray glass preferred where color rendition is important
DL-5: F11-2 p. 106
Heat Absorbing Heat Absorbing Glazing Glazing
Green is more common
Blue is becoming moreavailable
DL-5: F11-3 p. 107
Solar IR Solar IR Reflective Film Reflective Film
Low-E Glass
DL-5: F 11-6 p. 109
Multiple Glazing Multiple Glazing
Combinations of individual paned glazing
Mylar/Film layer Inert gas (argon or
krypton) “Superwindow”
Exotics Exotics
LED Windows Aerogels Kalwall
Prototype House and StudioThomas Herzog
