Daylighting Design And Sustainability

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Daylighting Design And Sustainability

  1. 1. Daylighting Design<br />
  2. 2. Why it’s a good idea<br />Current Cost of Energy<br />Model Energy Codes<br />Productivity & Daylight<br />“Green Design going Mainstream” <br />Market Differentiation for “Green” Firms<br />
  3. 3. Governor Hull’s Executive Order<br />
  4. 4. Human Performance<br />Up 20% increase in student performance<br />Up to 50% reduction in absenteeism<br />Rate of recovery increased in hospitals<br />Conclusion: We are not indoor animals!<br />
  5. 5. Economic Performance<br />Over 20 years, 94% of the cost of a building is in people<br />Therefore a 1% gain in productivity is worth more than a 1% increase in sales<br />1% Gain in prod = $4/sf/year in an office building (more than energy costs)<br />Reduce Maint and O&M costs<br />
  6. 6. Environmental Performance<br />40% of energy used to heat & cool buildings<br />An aggressive daylighting strategy can reduce electrical loads by 30%+<br />Reduce Use of Renewable Resources<br />Thus, reduce a Myriad of Pollutants<br />
  7. 7. How:<br />#1 is an Integrated Design Approach<br />Reallocation of Construction Dollars from mechanical systems to daylighting systems.<br />
  8. 8. Fundamentals:<br />High QUALITY footcandles. May mean a reduction in the amount of glass<br />Use High Performance Glass<br />Protect Glass (Ground is the light shelf)<br />Control Luminance Ratios <br />
  9. 9. The Prototypes<br />
  10. 10. Base Case<br />12 2x4 Trouffers, (1.36 W/sf)<br />92 sf of tinted glass (SC=0.51)<br />9’0” Ceiling<br />
  11. 11. Prototype 1-1<br />12 2 Lamp 2x4 Trouffers with dimming ballasts (0.89 W/sf)<br />82 sf of hi-performance glass (SC=0.22)<br />9’0” Ceiling<br />LEVEL 2<br />36” overhang<br />One photosensor<br />
  12. 12. Prototype 1-2<br />12 2 Lamp 2x4 Trouffers with dimming ballasts (0.89 W/sf)<br />43 sf of 20” clerestory (SC=0.26 unshaded, SC=0.38 shaded)<br />48 sf of view windows<br />9’0” Ceiling<br />LEVEL 2<br />36” overhang<br />Two photosensors<br />
  13. 13. Prototype 1-3<br />48 lf of FineLite Series 4 w/ 6 Motorola 4-Lamp dimming ballasts (0.89 W/sf)<br />57.4 sf of 20” clerestory (SC=0.26 unshaded, SC=0.38 shaded)<br />59.5 sf of view windows<br />10’6” Ceiling<br />Picture Mold at 8’0”<br />LEVEL 2<br />40” overhang<br />Two photosensors<br />
  14. 14. Prototype 1-4<br />48 lf of FineLite Series 4 w/ 6 Motorola 4-Lamp dimming ballasts (0.89 W/sf)<br />57.4 sf of 20” clerestory (SC=0.26 unshaded, SC=0.38 shaded)<br />+ Additional 63sf of clerestory in a roof step<br />59.5 sf of view windows<br />10’6”+ Ceiling<br />Picture Mold at 8’0”<br />40” overhang on Clerestories<br />Two photosensors<br />
  15. 15. Model Floor Plan<br />
  16. 16. Model Elevation<br />
  17. 17. Model Section<br />
  18. 18. The Numbers <br />Modeling performed on the Trane Trace 700 Program<br />
  19. 19. Prototype Comparison<br />2-Story Module, 16 Classrooms<br />Central Plant<br />
  20. 20. Daylighting Worksheet<br />
  21. 21. Illuminance Calculations<br />
  22. 22. Illuminance CalculationsGraphic<br />
  23. 23. Illuminance Calculations Summary<br />
  24. 24. Strategies - Daylighting Section<br />
  25. 25. Capistrano Study Classroomsfrom Heschong & Mahone Report<br />
  26. 26. Summary<br />Need and Opportunity Exists in schools AND workplaces<br />Integrated/Synergistic Design is the key<br />VE of the ‘system’ is not possible without compromising the results<br />We CAN create better environments for people without significantly increasing first cost<br />

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