1. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
PRESENTED BY:
Sandy Houck
December 3, 2009
B R U M M I T T E N E R G Y A S S O C I AT E S , I N C .
Helping people achieve very energy efficient buildings
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2. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
OVERVIEW
Defining Daylighting
Daylight Modeling
Optimizing Energy Savings
A Performance Daylighting Study
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3. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
QUALITIES OF DAYLIGHTING…
DAYLIGHT IS DYNAMIC
FULL SPECTRUM
PHOTO CREDIT: LRC DAYLIGHTING DIVIDENDS
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4. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
PHOTO CREDIT: GREEN SOURCE MAGAZINE
MORE DAYLIGHTING BENEFITS…
MAINTAIN CIRCADIAN RHYTHM
RELAX EYE MUSCLES
ALLEVIATE SICK BUILDING SYNDROME
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5. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
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6. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
WHAT WE DO NOT WANT TO CREATE…
A SAUNA WHERE PEOPLE HAVE TO WORK
PHOTO CREDIT: DAYLIGHTING COLLABORATIVE
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7. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEIES
WHAT WE DO NOT WANT TO CREATE….
A “DOUBLE-LIT” SPACE
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8. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
WHAT WE DO WANT ….
CREATE DRAMATIC &
DYNAMIC SPACES
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9. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
WHAT WE DO WANT….
QUALITY VISUAL ENVIRONMENT
VIEWS TO THE OUTSIDE
NATIONAL WILDLIFE FEDERATION HEADQUARTERS,
RESTON, VA.
(PHOTO CREDIT: HELLMUTH, OBATA &
KASSABAUM)
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10. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
HOW DO WE DO THAT?
USE DAYLIGHT (DIFFUSE
SKYLIGHT) AS PRIMARY
SOURCE OF ILLUMINATION
CREATE UNIFORM
ILLUMINANCE
INTEGRATE WITH ELECTRIC
LIGHTING
PHOTO CREDIT: LRC LIGHTING DIVIDENDS
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11. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
DESIGN FOR DAYLIT SPACES…
TASK/AMBIENT LIGHTING DESIGN
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12. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
DESIGN FOR DAYLIT SPACES…
LIGHT COLORED SURFACES
AVOID ‘CAVE’ EFFECT WITH LIGHT
COLORED CEILING
LAMP COLOR TEMPERATURE
(MIN. 4100K)
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13. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
DESIGN FOR DAYLIT SPACES…
PROVIDE GLARE CONTROL
ARCHITECTS hanna gabriel wells Headquarters
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14. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
DAYLIGHT MODELING TOOLS
1. SIMPLE GRAPHIC TOOLS
SOLAR ANGLE STUDY
DAYLIGHT ZONE MAPPING
2.
2 PRESCRIPTIVE TOOLS
LEED V2 & V3 DAYLIGHT CREDIT EQC8
SKYCALC
3. PERFORMANCE TOOLS
ILLUMINANCE CALCULATIONS (SOFTWARE)
PHYSICAL MODEL
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15. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
Whole Building Design Guide
SOLAR ANGLE STUDIES
LBL “Tips for Daylighting with Windows”
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16. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
DAYLIGHT ZONE MAPPING
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17. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
SKYCALC
TOPLIGHTING ONLY
EXCEL SPREADSHEET
FREE PROGRAM
WWW.ENERGYDESIGNRESOURCES.COM
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18. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
SKYCALC
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19. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
ILLUMINANCE CALCULATION SOFTWARE
AUTODESK’S ECOTECT (DAYLIGHT FACTOR)
RADIANCE (RENDERING)
FREE
DAYSIM
FREE
SPOT
FREE
LIGHTING ANALYSTS’ AGI32
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20. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
AGI32
LIGHTING ANALYSTS, INC.
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21. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
AGI32
LIGHTING ANALYSTS, INC.
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22. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
PHYSICAL MODEL
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23. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
SOURCE: DAYLIGHTING COLLABORATIVE
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24. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
6 ESSENTIAL INGREDIENTS FOR DAYLIGHTING TO OPTIMIZE ENERGY
SAVINGS (IES RP-5)
RP-
Architectural
Ingredients
1. PLAN INTERIOR SPACES FOR ACCESS TO DAYLIGHT
2. MINIMIZE DIRECT SUNLIGHT IN VICINITY OF CRITICAL VISUAL TASKS
3.
3 DESIGN SPACES TO MINIMIZE GLARE
A signer
4. ZONE ELECTRIC LIGHTING FOR DAYLIGHT RESPONSIVE CONTROL
Ingredients
EE/Ltg. Des
5. PROVIDE FOR DAYLIGHT RESPONSIVE CONTROL OF ELECTRIC LIGHTING
6. PROVIDE FOR COMMISSIONING & MAINTENANCE OF AUTOMATIC
CONTROLS
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25. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
1.
1 PLAN INTERIOR SPACES FOR ACCESS TO DAYLIGHT
ORIENT BUILDING TO MAXIMIZE DAYLIGHT POTENTIAL
-Long and narrow footprint
-Long axis running East/West
-High % perimeter area
Whole Building Design Guide
IESNA RP-5
RP-
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26. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
INTERIOR SPACE PLANNING TO MAXIMIZE DAYLIGHTING
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27. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
2. MINIMIZE DIRECT SUNLIGHT IN VICINITY OF CRITICAL VISUAL
TASKS
3. DESIGN SPACES TO MINIMIZE GLARE
IESNA RP-5
RP-
Whole Building Design Guide
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28. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
4. ZONE ELECTRIC LIGHTING FOR DAYLIGHT RESPONSIVE CONTROL
IESNA RP-5
RP-
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29. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
DEFINING DAYLIGHT ZONES:
Side Lighting Daylit Zones
Top Lighting Daylit Zones
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30. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
SIDELIGHTING – DAYLIT ZONE – TITLE 24 2005
SOURCE: CA TITLE24 NONRES MANUAL
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31. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
SIDELIGHTING – DAYLIT ZONE – TITLE 24 2008
SOURCE: CA TITLE24 NONRES MANUAL
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32. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
TOP LIGHTING DAYLIT ZONE – TITLE 24 05 & 08
SOURCE: CA TITLE24 NONRES MANUAL
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33. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
5. PROVIDE FOR DAYLIGHT RESPONSIVE CONTROL OF ELECTRIC
LIGHTING
Credit: LC&D, Lutron & WattStopper
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34. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
CONTROL SCHEMES FOR DAYLIT ZONES
ON/OFF SWITCHING
SAVES THE LEAST AMOUNT OF ENERGY OF ALL 3 CONTROL SCHEMES
STEPPED SWITCHING
STANDARD BI-LEVEL OF CA TITLE 24
WORKS WELL IN SOUTHERN CALIFORNIA
DIMMING
LEAST NOTICEABLE CHANGE IN LIGHT LEVELS
HIGHER INITIAL COST, THUS LONGER PAYBACK
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35. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
T24 MANDATORY CONTROLS & CONTROL CREDITS:
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36. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
OPEN LOOP PHOTOSENSOR PLACEMENT
LIGHTING CONTROL & DESIGN
Applications:
Lobbies
Circulation Spaces WATTSTOPPER
Warehouses
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37. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
CLOSED LOOP PHOTOSENSOR PLACEMENT
Applications:
Classrooms
l
Offices
Labs
LIGHTING CONTROL & DESIGN
WATTSTOPPER
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38. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
6. PROVIDE FOR COMMISSIONING & MAINTENANCE OF AUTOMATIC
CONTROLS
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39. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
SIDELIGHTING – DAYLIT ZONE – CALCULATED
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40. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
ARCHITECTS hanna gabriel wells Headquarters
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41. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
ARCHITECTS hanna gabriel wells Headquarters
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42. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
Daylight Harvest
Potential
for Open Office Area
all ltg
zones ltg
ON zones a
7% and c
OFF
8%
all ltg
zones
OFF
85%
Lighting Power Density
Interior Lighting
(W/SF)*
Installed lighting – without controls 0.82
Prescriptive ‐ with T24 daylight control credits 0.53
Performance ‐ estimate based on daylight modeling in
0.30
open office
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43. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
ARCHITECTS hanna gabriel wells Headquarters
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44. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
THE MANY BENEFITS OF DAYLIGHTING…
HEALTHIER & HAPPIER EMPLOYEES
NOT ONLY COMPLY WITH T24, DO BETTER THAN T24
ACHIEVE LEED POINTS
REALIZE ENERGY SAVINGS
EARN UTILITY INCENTIVES
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45. 11/30/2009
OPTIMIZING DAYLIGHTING STRATEGIES
PRESENTED BY:
Sandy Houck
shouck@brummitt.com
December 3, 2009
B R U M M I T T E N E R G Y A S S O C I AT E S , I N C .
Helping people achieve very energy efficient buildings
45