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Environmental Controls

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.

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Environmental Controls

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  1. Environmental Controls Lecture 18 Daylighting Design & Analysis Design Strategies Glazing and Reflectors Sidelighting Analysis Method

  2. Daylighting Design & Analysis

  3. Orientation and Slope Vertical vs. HorizontalTime of year Sun position DL-5 F. 10-1 p. 79

  4. Daylighting Components SC=Sun + Sky IRC1 IRC2 ERC S: F.14.18 p. 598

  5. 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

  6. 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%

  7. Isolux Contours • Lines of similar lighting levels • Expressed as DF Darwin College Library, Cambridge, England

  8. 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(%)= (EINT/EEXT) x 100

  9. 1+ 2+ 3+ 4+ 5+ 6+ 7+ 8+ 9+ Isolux Contours Example EEXT= 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 %

  10. 1 3 5 2 4 7 1 3 5 Isolux Contours Example EEXT= 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 % 6 4 2

  11. Isolux Contours • Lines of similar lighting levels • Expressed as DF Darwin College Library, Cambridge, England

  12. Illumination Gradient Ludwig Museum, Koln, Germany An illumination gradient through a section

  13. Design Strategies

  14. Selection Parameters Daylight availability Task orientation Space orientation

  15. Daylighting Graphs 10’ Ceiling 30” Work plane DL-5: F10-2 p. 80

  16. South Facing Walls Solid Overhang a: translucent glazing b: horizontal overhang c: 30º sloped clear glazing d: 45º sloped clear glazing DL-5: F10-5 p. 82

  17. 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: F10-6 p. 82

  18. Light Shelves W: With light shelf WO: Without light shelf DL-5: F10-18 p. 89

  19. 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: F10-21 p. 91

  20. Roof Monitors North-South Monitors a: translucent panel b: north monitor, clear glazing c: south monitor, translucent glazing DL-5: F10-30 p. 95

  21. Roof Monitors Sun Control Baffles/Louvers Light Wells DL-5: F10-35 p. 97

  22. Roof Monitors Graphic Design Approach DL-5: F10-37 p. 98

  23. Glazing & Reflectors

  24. Fenestration Window or Fenestration?

  25. Clear Glazing Maximum VLT DL-5: F11-1 p. 105

  26. Gray/Bronze Glazing Gray glass preferred where color rendition is important DL-5: F11-2 p. 106

  27. Heat Absorbing Glazing • Green is more common • Blue is becoming moreavailable DL-5: F11-3 p. 107

  28. Solar IR Reflective Film Low-E Glass DL-5: F 11-6 p. 109

  29. Multiple Glazing • Combinations of individual paned glazing • Mylar/Film layer • Inert gas (argon or krypton) • “Superwindow”

  30. Exotics • LED Windows • Aerogels • Kalwall Prototype House and Studio Thomas Herzog

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