Bruce Curtis, PE, CEM. LED Lighting & Controls

Transcription

1 Bruce Curtis, PE, CEM LED Lighting & Controls

2 LED Luminaire Components LEDs / LED Array LED Driver Thermal Management Optics Integrated Controls Confidential & Proprietary 2

3 LED Basics Substrate Lens LED chip Phosphor

4 LED Performance

5 LED Drivers DC Power Supply 24 to 60 volts Typical milliamps: 350, 525, 700, 1050 Non-Dimmable Dimmable Power line switched step dimming (typically 50%) Power line voltage dimming Low voltage wire analog (0-10 volt) Low voltage wire digital/dali (proprietary, non-proprietary) Wireless Zigbee (proprietary, non-proprietary) Dimming Range 10-20% (most applications) 1% (conference rooms, A/V) Life Expectancy & Warranty 70,000 to 90,000 hours 5 year warranty typical

6 LEDs Depreciate Over Time Heat is the Culprit Time &Temperature LED Temperature LED Drive Current Ambient temperature Fixture thermal management) Life is Extended by: Dimming Shutting/off

7 L (x)70 Life What is it? Luminaire run-hours to depreciate to 70% of initial output 70 degree ambient temperature Rated lumens (LED drive current) (x) is the actual hours the fixture was tested Can extrapolate up to 6 times the testing hours It is easy to be fooled! Is it the LEDs or luminaire? How do you extend the life? Specify high L70 ratings Oversize the fixture Dim the fixture Reduce run time (turn off)

8 How can I Compare Products? L 70 Rated Life Energy Star Rating? For lamps and downlights DLCQP Listing? Design Lights Consortium Qualified Product List For luminaires Lighting Facts DOE Program Manufacturer/Model of Key Components LEDs, drivers Are they tier 1 suppliers??? Manufacturers Warranty and Their Terms Drivers included? Tier 1 LED Fixture Company? Size, years in business, financial strength

9 Why Lighting Controls? Additional Energy Savings Employ dimming strategies (1:1 energy reduction ratio) Unlimited cycles of being turned on and off Extend the Life of the LED Luminaires Increased life through dimming, on/off control Lumen Management Maintain light levels over the long term Improved Lighting Quality Consistent light levels over time Personal control of light levels (if wanted) Compliance (Have to Do it) NYC Building Code, LL88 LEED Certification

10 Lighting Control Strategies Scheduling: Lights automatically turn off or are dimmed at certain times of the day or based on sunrise or sunset. Occupancy/Vacancy Sensing: Automatically turning lights off when people vacate the space. Partial On/Off: Lights turn On/Off to a preset dimmed light level when people enter/vacate the space. Multi-level Lighting/Dimming: Proving users one or more light levels than full-on and full-off. 10

11 Lighting Control Light Strategies Control Strategies Daylight Harvesting: Automatically adjust light levels based on the amount of daylight in the space. High-End Tuning: Set target light level based on occupant requirements in the space. Personal Light Control: Allow users in the space to select the correct light levels for the desired task. 11

12 Lighting Controls: Time Clock / Manual Shutoff Lighting Power Used Annual energy consumption = 4.5 kwh / sf* Timeclock and Manual Shutoff 1W/sf 12 midnight 12 noon 12 midnight 12 Time

13 Lighting Controls: Occupancy Sensing and Tuning Annual energy consumption = 4.5 kwh / sf 3.6 kwh / sf (occ sensing 1 ) 2.7 kwh / sf (tuning 2 ) 1W/sf Occupancy sensing 1W/sf Occupancy sensing + tuning 12 midnight 12 noon 12 midnight 12 midnight 12 noon 12 midnight 13

14 Lighting Controls: Daylighting / Personal Control Annual energy consumption = 4.5 kwh / sf 3.6 kwh / sf (occ sensing 1 ) 2.7 kwh / sf (tuning 2 ) 2.0 kwh / sf (daylighting 3 ) 1.8 kwh / sf (personal ctrl. 4 ) 1W/sf Occupancy sensing + tuning + Daylighting 1W/sf Occupancy sensing + tuning + Daylighting + personal control 12 midnight 12 noon 12 midnight 12 midnight 12 noon 12 midnight 14

15 Energy Code ASHRAE 90.1 Section 9 Jointly sponsored by ASHRAE and IES As of October, 2013 will be the current version for NYC New Construction and Additions Interior and exterior lighting Lighting Alterations of more than 10% of the lighting load 15 15

16 ASHRAE Mandatory Provisions 9.2 Compliance (LPD Lighting Power Allowances) Lighting Controls Interior Lighting Control Parking Garage Control Special Applications Exterior Lighting Control Functional Testing 9.7 Submittals 16

17 ASHRAE Mandatory Provisions Interior Lighting Control a. Local control b. Restricted to manual ON c. Restricted to partial automatic ON d. Bilevel lighting control e. Automatic daylight responsive controls for sidelighting f. Automatic daylight responsive controls for toplighting g. Automatic partial OFF h. Automatic full OFF i. Scheduled shutoff 17