Energy Codes: Mark A. Gelfo, PE. LEED AP BD+C, LEED AP O+M, CxA, EMP

Size: px

Start display at page:

Download "Energy Codes: Mark A. Gelfo, PE. LEED AP BD+C, LEED AP O+M, CxA, EMP"

Angela Montgomery
6 years ago
Views:

1 Quality Lighting Design and Energy Codes: We Can Have Both Mark A. Gelfo, PE LEED AP BD+C, LEED AP O+M, CxA, EMP TLC Engineering i for Architecture t

2 Learning Objectives 1. Understand the lighting requirements of the numerous energy codes and standards 2. Recognize the challenges balancing functionality, patient care, aesthetics, and energy 3. Apply lighting design strategies to meet these challenges 4. Understand the role of lighting g controls, daylighting, and exterior lighting in the design / energy balance.

3 Lighting as an Energy Reduction Target

4 When I started 20 years ago.. 2x4, 4 lamp lensed troffer was standard 2-3 watts/sf was typical

Approximately One-Fifth of Energy Consumed in Commercial Buildings

Cooking, 3% Refrigeration, 6% Total Site Energy Consumption: 6,523

Lighting, 21% Cooling, 8% Source: Energy Information

5 Approximately One-Fifth of Energy Consumed in Commercial Buildings is Used for Lighting Office Equipment, <1% Other, 9% Computers, 2% Cooking, 3% Refrigeration, 6% Total Site Energy Consumption: 6,523 trillion Btu Space Heating, 36% Ventilation, 7% Water Heating, 8% Lighting, 21% Cooling, 8% Source: Energy Information Administration, 2003 Commercial Buildings Energy Consumption Survey, Table E1A.

2% Space Heating, 4% Computers, 5% Lighting, 38% Refrigeration, 12% Ventilation,13% Cooling, 13%

6 More Site Electricity is Used for Lighting than Any Other End Use Office Equipment, <1% Other, 357 trillion Btu, 12% Cooking, 1% Total Site Electricity Consumption: 3,037 trillion Btu Water Heating, 2% Space Heating, 4% Computers, 5% Lighting, 38% Refrigeration, 12% Ventilation,13% Cooling, 13% Source: Energy Information Administration, 2003 Commercial Buildings Energy Consumption Survey, Table E3.

7 Lighting and Sustainability

8 LEED is Leading the Way LEED for Healthcare 2009 LEED for Healthcare v4 Light Pollution Reduction Optimize Energy Performance Commissioning Controllability of Systems - Lighting Building Codes are following suit IgCC ASHRAE 189 FBC Chapter 13

9 The Double-Whammy Less Lighting = Less Chiller For every 100 watts of lighting energy saved 50 watts 50 watts of cooling energy is also saved

10 Lighting and Energy Codes

11 Energy Standards: Lighting Standard Hospital Office School / University ASHRAE Energy Standard for Buildings Except Low-Rise Residential Buildings ASHRAE Energy Standard for Buildings Except Low-Rise Residential Buildings ASHRAE Standard for the Design of High Performance Green Buildings 1.2 W/sf 1.0 W/sf 1.2 W/sf 1.21 W/sf (note this is a slight increase from 2007) Prescriptive 10% < ASHRAE (1.2 W/sf) = 1.08 W/sf 0.90 W/sf 0.99 W/sf Prescriptive 10% < ASHRAE (1.0 W/sf) = 0.9 W/sf Prescriptive 10% < ASHRAE (1.2 W/sf) = 1.08 W/sf

12 Energy Standards: Lighting Standard Hospital Office School / University Energy Policy Act (EPAct) 2005 The Commercial Buildings Energy Consumption Survey (CBECS) 2003 International Energy Conservation Code (IECC) 2012 International Green Construction Code (IGCC) % reduction from ASHRAE (1.6 W/sf) = 25% reduction from ASHRAE (1.3 W/sf) = 25% reduction from ASHRAE (1.5 W/sf) = W/sf 12W/sf W/sf W/sf National Average Lighting EUI= 11.7 kwh/sf References ASHRAE (see above) National Average Lighting EUI= 6.8 kwh/sf References ASHRAE (see above) National Average Lighting EUI= 3.2 kwh/sf References ASHRAE (see above) 1.21 W/sf 0.90 W/sf 0.99 W/sf References ASHRAE (see above) 1.08 W/sf References ASHRAE (see above) 0.9 W/sf References ASHRAE (see above) 1.08 W/sf

13 Energy Standards: Lighting Standard Hospital Office School / University LEED BD+C 2009 LEED BD+C v4 LEED for HC: Min 10% reduction from ASHRAE (1.2 W/sf) = 1.08 W/sf LEED for HC: Min 5% reduction from ASHRAE (1.21 W/sf) = 1.15 W/sf Interiors 2009 ASHRAE (1.2 W/sf) = 1.02 W/sf LEED NC: Min 10% reduction from ASHRAE (1.0 W/sf) = LEED for Schools: Min 10% reduction from ASHRAE (1.2 W/sf) = 0.9 W/sf 1.08 W/sf LEED NC: Min 5% reduction from ASHRAE (0.90 W/sf) = 0.86 W/sf LEED for Schools: Min 5% reduction from ASHRAE (xx W/sf) = 0.94 W/sf LEED for Commercial 15% reduction from 15% reduction from 15% reduction from ASHRAE ASHRAE 90.1 (1.0 W/sf) = 2007 (1.2 W/sf) = 0.85 W/sf 1.02 W/sf

14 Quality Lighting and Energy Efficiency

15 Use Energy-Efficient Efficient Light Sources Lamp Efficacy (lumens/watt)

16 Don t Use Incandescents. Ever. Source Color Rendering Index (CRI) Color Temp Range (K) Efficacy (lumens/watt) Incandescent Yes Halogen Yes LED Yes CFL Yes Dimmable? Halogen is not an energy efficient source Be sure to spec what you want and get what you spec

17 Put the Light Where You Need It Light the vertical surfaces Task lighting Accent lighting Don t (just) light the floor

18 Task-Ambient Lighting Design Don t include dedicated exam lights in lighting g power budget Do include general critical and life safety lighting g

19 Take Advantage of Daylight (and Views) Use natural light in lieu of artificial light where possible. Control the lights!

20 Control the Lights Zone Controls Vacancy Sensors Daylight Sensors

21 Use Lightly Colored (High Reflectance) Surfaces

7 w/sf Nemours Children s Hosp, Orlando,

22 Recent Projects 1.14 w/sf 0.8 w/sf 1.0 w/sf Phoebe Sumter Med Ctr, Americus, GA FH Celebration Patient Tower, Celebration, FL BMC Wolfson Weaver Tower,Jacksonville, FL 08w/sf w/sf w/sf Nemours Children s Hosp, Orlando, FL Lehigh Valley Hospital, Allentown, FA Martin Memorial Tradition, Port St. Lucie, FL

23 Don t Forget the Exterior

24 Exterior Lighting A Balancing Act Energy Efficient Sources Controls Max/Min Ratios Watts/sf Performance Lighting Levels Glare Color Rendering Security Aesthetics

25 ASHRAE Lighting Power Densities for Building Exteriors Site Zone 0 Undeveloped areas in national and state parks and rural areas. Tradable Surfaces Zone 1 Developed areas in national and state parks and rural areas. Zone 2 Residential, neighborhood business, & light industrial zoning. Zone 3 All other areas. Zone 4 High activity commercial districts in major metropolitan areas. (LPDs for uncovered parking areas, building grounds, building entrances and exits, canopies, overhangs, and outdoor sales areas may be trades) Uncovered No allowance 0.40 W/sf 0.06 W/sf 0.10 W/sf 0.13 W/sf Parking Walkways <10 No allowance 0.70 W/lf 0.70 W/lf 0.80 W/lf 1.0 W/lf ft wide Walkways >10 No allowance 0.14 W/sf 0.14 W/sf 0.16 W/sf 0.20 W/sf ft wide, Plaza Areas, Special feature areas Main Entries No allowance 20 W/lf of door 20 W/lf of door 30 W/lf of 30 W/lf of door width width door width width Other Doors No allowance 20 W/lf of door width 20 W/lf of door width 20 W/lf of door width 20 W/lf of door width Building Entry No allowance 0.25 W/sf 0.25 W/sf 0.4 W/sf 0.4 W/sf Canopies Source: ASHRAE Edition, Table 9.4.3B

26 Put the Light Where You Want It Graphic courtesy of arm.ac.uk

27 Exterior Lighting Photo courtesy of KBJ Architects

28 Exterior Lighting Photo courtesy of Perkins+Will Photo courtesy of Gresham Smith + Partners

29 Mark s Lighting Efficiency Top Buildings use a lot of (lighting) energy. 2. Know your targets. 3. Use energy-efficient sources. 4. Don t use incandescents. Ever. 5. Put the light where you need it. 6. Use task-ambient lighting design. 7. Take advantage of daylight (and views). 8. Control the lights. 9. Use lightly colored surfaces. 10. Don t forget the exterior.

30 Questions? Q: Why would you run 20 CHW pipe over MV switchgear? A: I have no idea. I found it this way.

General Lighting Recommendations

General Lighting Recommendations DESIGN GUIDELINES FOR ENERGY EFFICIENT LIGHTING SYSTEMS According to the US Department of Energy, 51 percent of the energy used in commercial buildings is consumed by lighting