Design Toolkit for Bi-Level LED Lighting

Transcription

1 Design Toolkit for Bi-Level LED Lighting Best Practices from the Field Month Day, 2015

2 2 Who is this Toolkit for?

3 Use this Toolkit if you: 3 Work with Low-rise Multifamily Buildings Developer Owner Property Manager Designer Energy Manager

4 4 What does this Toolkit do?

5 This Toolkit will help: Maximize energy savings Increase residents satisfaction Reach code compliance Meet requirements of energy efficiency programs 5

6 6 Where does this Toolkit apply?

7 Use this Toolkit with Low-rise Multifamily Buildings Outdoor Common Areas Entryways Near building walkways Parking lots Indoor Common Areas Lobbies Corridors Stairwells 7

8 8 Why Bi-Level LED Lighting?

9 Bi-Level LED Lighting 9 Provides two levels of lighting High level when occupied Low level when unoccupied Bi-level LED lighting significantly reduces energy use.

10 Benefits of LED Lighting 10 Reduced light pollution LED controls keep lights off or low for much of the time Reliable LED lights are not affected by on/off switching or by dimming Lifespan LED lights last longer than other lighting types, reducing replacement costs LED lights turn on fast at low temperatures LED lights have very good customer satisfaction rates

11 11 Lighting Power Density and Light Level Guidelines

12 Guidelines for Corridors 12 Lighting Power Density IES Light Level.07 W/sf 3 fc

13 Guidelines for Stairwells 13 Lighting Power Density IES Light Level.15 W/sf 5 fc

14 Guidelines for Parking Lots 14 Lighting Power Density IES Light Level.04 W/sf 1 fc

15 15 Energy Efficiency Program Requirements

16 Energy Efficiency Program Requirements 16 Choose ENERGY STAR or DesignLights Consortium rated light fixtures to meet lighting compliance for these programs: NYSERDA Low-Rise New Construction Program Enterprise Green Communities ENERGY STAR Certified Homes NYS HCR Weatherization Assistance Program

17 17 Bi-Level Lighting Sensors

18 Occupancy Sensors: Check for People Occupancy sensors trigger light fixtures to: Dim or turn off after an occupant leaves an area Turn on when an occupant enters an area 18 Occupancy sensors work by using: Passive Infrared (PIR) detection to sense heat signatures from occupants Ultrasonic wave detection to hear sound waves generated from movement Combination of PIR and ultrasonic

19 Photosensors: Check for Daylight Photosensors determine ambient light levels. Prevent turning on during the daylight hours Can make adjustments to light levels for daylighting 19

20 20 Control Strategies

21 Control Settings: An Example Lights ramp down slowly when time delay expires Lights ramp up quickly when motion is detected 21

22 Control Settings to Achieve Optimal Energy Savings Light Levels High Light Level When the light is on; set to 80% to 100% of max light level Low Light Level When the light is dimmed; set to 0% to 20% Sensitivity to Light Level Used to fine-tune the sensor; set to medium or 50% to 75% 22

23 Control Settings to Achieve Optimal Energy Savings Time Time Delay The elapsed time of non-occupancy before dimming; set to 30 seconds to 5 minutes Ramp Down Time How quickly the light decreases; set to 30 seconds to 5 minutes Ramp Up Time How quickly the light increases; set to instant or 3 seconds 23

24 A Key Factor to Achieve Optimal Energy Savings 24 Shorter Time Delays A study shows that a time delay of 30 seconds in corridors results in a substantial 75% savings.* *taitem.com/wp-content/uploads/lighting-off-delay.pdf

25 25 Commissioning Best Practices

26 Commissioning Best Practices 26 Verify sensors installed as per manufacturers requirements Test occupancy controls Verify no nuisance triggers Check timeclock time, date, and schedule Conduct sensor tests in the early morning or at dusk to observe sensor reactions to actual events.

27 Field Research 27

28 Field Research Overview 28 NYSERDA Emerging Technologies and Accelerated Commercialization (ETAC) Demonstration Project Bi-level LED lighting was installed at three low-rise, affordable housing multifamily sites in New York. Sensor types were evaluated. Control settings were evaluated. Energy use was monitored and analyzed. Residents and lighting contractors were surveyed.

29 Field Research Results 29 Energy savings results were compared to energy use if the lights were operated at full output and did not dim: Exterior Wallpacks 82% Parking Lot Lights 46 to 86% Stairwells Long time delay (15 minutes) 23 to 36% Medium time delay (10 minutes) 38 to 41% Short time delay (5 minutes) 43 to 47%

30 Field Research Results 30 Resident Comments I love that, the way they get brighter when I get closer. I get scared at night; these make me feel better. I think they should do these everywhere. Very safe! I do like the lights a lot! I think the lights are really nice! When I take out the garbage, it does work perfectly. I love how the sensors turn the light up.

31 Credits 31

32 Produced with support from: 32 Taitem Engineering, PC Lighting Research Center Affordable Housing Concepts May, 2017