Double Platinum LEED Performance: National Grid Optimal Lighting
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Double Platinum LEED Performance: National Grid Optimal Lighting/Minimal Energy Terr Clark, Terry Clark Fo Founder nder & CEO – Finelite, Finelite Inc Inc. What is good lighting? It’s It s hard to quantify IALD metric of quality (Still being developed) quality y of the visual environment IES q (Still being developed) Visually comfortable Appropriate A i t illuminance ill i YOU KNOW IT WHEN YOU SEE IT! Page 2 Page 3 Page 4 New drivers for lighting Building energy codes and standards - ASHRAE / IES Standard 90.1 - IECC - California Title 24 - IGCC - ASHRAE 189 G Green building b ildi certification tifi ti programs Advocacy y groups g Professional organizations Page 5 The evolving ASHRAE / IES standard 90.1 Open office as an example: 90.1 - 1999 1 5 w/ft2 plus 0 1.5 0.35 35 w/ft2 VDT allowance 90.1 - 2001 No change 90.1 - 2004 Office allowance 1.1 w/ft2 plus a 0.35 w/ft2 VDT allowance 90.1 - 2007 No more VDT allowance 90.1 - 2010 0 97 w/ft2 0.97 Page 6 Refining “good” lighting as an essential building element “Sustainable lighting design meets t the th qualitative needs of the visual environment with the least impact on the natural environment.” International Association of Lighting Designers, 2001 Illuminating Engineering Society of North America, 2003 Page 7 Appealing Efficient S t i bl Sustainable Enlivening Provocative Engaging Comfortable Designers Codes Good Lighting E Energy Code C d Visual Quality, Health, & Wellbeing No Nothing Daylighting 2% daylight for 75% regularly occupied spaces New 90.1 top lighting allowances Energy gy Efficiency y Cumulative 14% ≤ ASHRAE/IES Std. 90.1 - 2007 Standard 90.1 - 2007 IECC 2007 CA Title 24 Controls Individual control, y g dimming g daylight Occupancy controls Dark Sky Limited skyward light depending on environmental zone Energy standards, IDA Model Ltg Ordinance Page 8 Q: What does it take to achieve remarkable high performance lighting? Page 9 Q: What does it take to achieve remarkable high performance lighting? A: Collaboration Page 10 Q: What does it take to achieve remarkable high performance lighting? A: Collaboration This is the story of National Grid Page 11 Who are they? National Grid is an international electricity and gas company. They are one of the largest energy companies i iin th the world. ld Page 12 National Grid What were their goals? Build a benchmark building g in energy gy performance as U.S. Headquarters Demonstrate low energy lighting to their clients Create an attractive workplace for the National Grid staff Page 13 National Grid How to achieve their goals? Assemble a collaborative team that will work toward sustainable goals with a focus on lighting. Set aggressive Lighting Power Density (LPD) targets Closely integrate lighting design with the interior design Page 14 Typical lighting information flow Page 15 National Grid lighting information flow Page 16 National Grid How to achieve their goals? Set aggressive gg Lighting g g Power Density y ((LPD)) targets g Page 17 National Grid The client had an LPD target! 0.65 w/ft2 or 35% below code before we started the project. Page 18 National Grid Page 19 National Grid Page 20 National Grid LPD: How do you get there? Collaboration and a confluence of good design decisions. Page 21 Right sizing the illuminance Task/ambient/vertical Lamp and ballast Efficient fixtures Reflectances Furniture layout National Grid Page 22 National Grid Page 23 National Grid - High efficiency fixtures Page 24 National Grid - High efficiency fixtures Page 25 National Grid Page 26 National Grid How to achieve their goals? Assemble a collaborative team that will work toward sustainable goals with a focus on lighting. Set aggressive Lighting Power Density (LPD) targets Closely integrate lighting design with the interior design Page 27 Collaboration Page 28 Collaboration Page 29 Breakthrough i G in Generall Li Lighting hti An Overview Page 30 Finding # 1 – Light the task first Make LIGHTING THE TASK properl your properly o r FIRST priority! priorit ! Use task lighting as the PRIMARY layer of light New, LED task luminaires provide the right amount of light g exactly y where yyou need it Old, fluorescent task luminaires simply do not work - Too much light - Too much glare - Too much energy gy Page 31 #1 Finding # 2 – Light the vertical surfaces Page 32 #2 Finding # 3 – Ambient light needs only 0.4 w/ft2 When, Wh Task lighting is correct, Vertical surfaces are lighted Then, Ambient lighting needs only 0.4 w/ft2 Page 33 #3 Finding # 3 – High-efficiency T8 luminaires Use high-efficiency pendant T8 luminaires with only 1-lamp in cross section 1-lamp 1l T8 cross section ti Over 90 lumens/watt 12 to 16 ft on center 0.4 w/ft2 0.4 w/ft2 works! Page 34 $2 $2.33/ft 33/ft2 installed cost #3 Finding # 3 – High-performance recessed luminaires High-performance recessed luminaires can also be used t provide to id ambient bi t lilight ht att 0.4-0.5 w/ft2 2-lamp T8 - 0.71 BF - Over 80 lumens/watt - 8’ x 10’ on center spacing - 0.49 w/ft2 0.4 - 0.5 w/ft2 works! Page 35 1-lamp T8 - 1.20 BF - Over 85 lumens/watt - 8’ x 10’ on center spacing - 0.40 w/ft2 Advantages of 1-lamp approach: - 50% fewer lamps - 20% energy savings over 2-lamp #3 Key results summary Three “layers of light” satisfy users at under 0.5 w/ft2 Page 36 When task lighting is not done properly, all carry part of the load User satisfaction is achieved with half of the energy used before Less material is used Fewer lighting controls are needed Installation costs are optimized Air conditioning loads are reduced Operating costs are slashed Verify the quality: Task Luminance (cd/m2) Task (fc) 3 2 1 12 7 130 30 48 54 68 1 Page 37 Meets targets 1 Luminance Uniformity Ratios Around Seating Area = 11:1 Across Broad Viewing Areas = 26:1 Verify the quality: Vertical Luminance (cd/m2) Vertical (fc) 12 25 47 9 5 130 2 2 4 9 1 Page 38 Meets targets 1 Luminance Uniformity Ratios Around Seating Area = 33:1 Across Broad Viewing Areas = 1.3:1 Adding the layers and verify the quality: Task + Vertical Luminance (cd/m2) Task + Vertical (fc) 15 26 49 12 21 130 32 50 58 77 2 Page 39 Meets targets 2 Luminance Uniformity Ratios Around Seating Area = 6:1 Across Broad Viewing Areas = 2.2:1 Verify the quality: Ambient Luminance (cd/m2) Ambient (fc) 225 9 11 29 18 130 18 20 26 Page 40 59 32 Meets targets 14 Luminance Uniformity Ratios Around Seating Area = 5:1 Across Broad Viewing Areas = 0.5:1 Adding all the layers and verify the quality Task + Vertical + Ambient (fc) Luminance (cd/m2) 240 60 35 50 30 130 50 70 90 136 28 Page 41 Meets targets 16 Luminance Uniformity Ratios Around Seating Area = 2.6:1 Across Broad Viewing Areas = 1.5:1 Key results – energy savings Documented 56% TOTAL ENERGY SAVINGS Design Calculations and Installed Cost Estimates: Standard Practice: 1.1w/ft2, 3-lamp T8 parabolic, 8’ x 10’ on center spacing, T8 Undercabinet task lights Breakthrough: 0.48w/ft 0 48w/ft2, 1-lamp T8 indirect/direct pendant pendant, 12’ 12 on center spacing spacing, 6W LED Undercabinet task lights Page 42 Remember, know the costs for best practices Lower Installed Cost Design calculations and installed cost estimates Standard Practice: 1.1w/ft2, 3-lamp T8 parabolic, 8’x10’ on center spacing, T8 Undercabinet task lights Breakthrough: 0.48w/ft2, 1 1-lamp lamp T8 indirect/direct pendant, 12’ 12 on center spacing, 6W LED Undercabinet task lights Page 43 Collaboration Page 44 Project Vision Page 45 Project Vision Page 46 Project Vision Page 47 Project Vision Page 48 Project Vision Page 49 Project Vision Page 50 Project Vision Page 51 Project Vision Page 52 Project Vision Page 53 Project Vision Page 54 Project Vision Page 55 Project Vision Page 56 Collaboration Page 57 Collaboration Page 58 How did we do? ASHRAE allowable Lighting g g Power Density y 1.0 w/ft2 National Grid target 0.65 National Grid actual 0.54! LEED CI awards: 1 point for 15% below ASHRAE 2 points for 25% below ASHRAE 3 points for 35% below ASHRAE Page 59 How did we do? LEED 2.2 2 2 Platinum Core and Shell LEED 2.2 Platinum Corporate Interiors Second single occupant tenant building in the world to achieve this with energy use 40% b below l ASHRAE 90 90.1 1 Page 60
