
06bf0c1263a0f8e00e45239718ffdd8c.ppt
- Количество слайдов: 31
Environmental Controls 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
Daylighting Components SC=Sun + Sky IRC 1 IRC 2 ERC S: F. 14. 18 p. 598
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) 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 100 DF (%)=2. 0%
Isolux Contours n n Lines of similar lighting levels Expressed as DF Darwin College Library, Cambridge, England
Isolux Contours Example EEXT= 2000 fc 1: 20 fc 2: 60 fc 3: 100 fc 4: 40 fc 5: 80 fc 6: 140 fc 7: 20 fc 8: 60 fc 9: 100 fc 1+ 2+ 3+ 4+ 5+ 6+ 7+ 8+ 9+ DF(%)= (EINT/EEXT) x 100
Isolux Contours Example EEXT= 2000 fc 1: 20 fc 2: 60 fc 3: 100 fc 4: 40 fc 5: 80 fc 6: 140 fc 7: 20 fc 8: 60 fc 9: 100 fc DF=1 % DF=3 % DF=5 % DF=2 % DF=4 % DF=7 % DF=1 % DF=3 % DF=5 % 1+ 2+ 3+ 4+ 5+ 6+ 7+ 8+ 9+
Isolux Contours Example EEXT= 2000 fc 1: 20 fc 2: 60 fc 3: 100 fc 4: 40 fc 5: 80 fc 6: 140 fc 7: 20 fc 8: 60 fc 9: 100 fc DF=1 % DF=3 % DF=5 % DF=2 % DF=4 % DF=7 % DF=1 % DF=3 % DF=5 % 1 3 5 2 4 7 1 3 2 5 4 6
Isolux Contours n n Lines of similar lighting levels Expressed as DF Darwin College Library, Cambridge, England
Illumination Gradient An illumination gradient through a section Ludwig Museum, Koln, Germany
Design Strategies
Selection Parameters Daylight availability Task orientation Space orientation
Daylighting Graphs 10’ Ceiling 30” Work plane DL-5: F 10 -2 p. 80
South Facing Walls Solid Overhang a: translucent glazing b: horizontal overhang c: 30º sloped clear glazing d: 45º sloped clear glazing DL-5: F 10 -5 p. 82
South Facing Walls Diffusing Awnings a: translucent glazing b: translucent awning clear glazing c: white vertical slatted awning, clear glazing d: white, horizontal slatted awning, clear glazing DL-5: F 10 -6 p. 82
Light Shelves W: With light shelf WO: Without light shelf DL-5: F 10 -18 p. 89
Skylights Effect of skylight above roof a: flat horizontal b: half-round barrel, white opaque ends c: steeply sloped A-frame, white opaque ends Typographic Error In Reading DL-5: F 10 -21 p. 91
Roof Monitors North-South Monitors a: translucent panel b: north monitor, clear glazing c: south monitor, translucent glazing DL-5: F 10 -30 p. 95
Roof Monitors Sun Control Baffles/Louvers Light Wells DL-5: F 10 -35 p. 97
Roof Monitors Graphic Design Approach DL-5: F 10 -37 p. 98
Glazing & Reflectors
Fenestration Window or Fenestration?
Clear Glazing Maximum VLT DL-5: F 11 -1 p. 105
Gray/Bronze Glazing DL-5: F 11 -2 p. 106 Gray glass preferred where color rendition is important
Heat Absorbing Glazing DL-5: F 11 -3 p. 107 n n Green is more common Blue is becoming more available
Solar IR Reflective Film DL-5: F 11 -6 p. 109 Low-E Glass
Multiple Glazing n n Combinations of individual paned glazing Mylar/Film layer Inert gas (argon or krypton) “Superwindow”
Exotics n n n LED Windows Aerogels Kalwall Prototype House and Studio Thomas Herzog