DTE Energy Company · NYSE:DTE
DTE Energy — Technical Presentation (May 2010)
17 slides from DTE Energy's technical presentation, May 2010
Slide 1: Energy Efficient Lamp Sources and Design Webinar
ENERGY EFFICIENT LAMP SOURCES AND DESIGN WEBINAR INSERT IMAGES
Slide 2: Borders-Ann Arbor Prototype
Borders-Ann Arbor Prototype INSERT IMAGES 95% fluorescent sources, 5% ceramic metal halide 65 fc avg at floor 35 fc avg at vertical shelving Only 1.9 watt/sq.ft total
Slide 3: Linear Fluorescent Lamp Usage
LINEAR FLUORESCENT LAMP USAGE • T12 lamp usage is currently in global decline but has a high percentage of use in developing countries • T8 lamp usage is still growing globally but beginning to decline in North America. Energy saving retrofit use accounts for much of this growth. • T5 lamp usage is
Slide 4: 4' Fluorescent Lamp Systems Comparison
4’ FLUORESCENT LAMP SYSTEMS COMPARISON Rated Output Raw Life Lamp (lumens) Efficacy materials (hrs) 2x40w T12 100% ~67 L/w 100% 20000 2x32w T8 108% ~88 L/w 67% 30000 2x28w T5 115% ~95 L/w 42% 30000 Ambient temperature affects lamp operation considerably. T12 and T8 systems are optimized for a 25 deg
Slide 5: Fluorescent Lamp Systems Comparison (cont)
FLUORESCENT LAMP SYSTEMS COMPARISON (cont) • All T12/T8/T5 lamps come in a wide variety of color temperatures (2700k- 6500K) • All T12/T8/T5 lamps come in HO (high output) versions, allowing approx 2x lumen output and wattage in the same diameter envelope as non-HO versions. • All T5 lamps are high
Slide 6: DTW – North Terminal
DTW – North Terminal 90% fluorescent sources 10% ceramic metal halide 12 fc avg at floor- circulation 25 fc avg at floor-gates <2.5 watts/sq. ft.
Slide 7: Conventional Sources vs. LED
CONVENTIONAL SOURCES VS. LED Conventional lamp sources LED sources emit light in a emit light in a 360 degree precisely focused pattern pattern or toroid distribution
Slide 8: Conventional Sources vs. LED 2
CONVENTIONAL SOURCES VS. LED 2 Conventional lamp sources typically use reflectors or refractors (sometimes a combination of the 2) to direct light where it is wanted. There are always losses involved with the modification of light distribution. This is known as fixture efficiency and can typically b
Slide 9: LED Construction
LED CONSTRUCTION LUXEON REBEL SEOUL SEMICONDUCTOR Z-POWER LUXEON K2 An LED uses refraction too, but the initial directionality of the diode and small size of the initial light source results in a highly efficient optical system
Slide 10: Lamp/Lumens/Life Characteristics
LAMP/ LUMENS/ LIFE CHARACTERISTICS Lumens per Watt is the Efficacy of a lamp source and provides a basis for determining how much light is produced from a watt of input power Efficacy Average Wattage Including Rated Life Types of Lamps Range Ballast Losses (hours) LED-cool white .125-5 50 – 110 50,0
Slide 11: Capitol Tower – Austin, TX
Capitol Tower – Austin, TX •Color changing LED system •58% energy reduction over 3 color fluorescent wash light •3x lamp life=reduced maintenance costs
Slide 12: LED Economics
LED ECONOMICS •LED technology continues to evolve, with a corresponding increase in output and decreasing costs. •Color changing systems have far longer life and are far more economical to operate than any other system. •Linear accent lighting for coves and outlining typically cost less than 25% of
Slide 13: LED Retrofits - Caution!
LED RETROFITS- CAUTION! •UL/ETL listing violation •Fixture manufacturer warranty issues •No heat dissipation considerations, so your results may vary •Ballasts/transformers must be removed to convert. Most ballasts emit about 90v AC. LED needs 12/24vdc •Unproven cost/benefit ratios •No formal recycl
Slide 14: Application of Conventional Sources vs. LED
APPLICATION OF CONVENTIONAL SOURCES VS. LED Conventional lamp sources are like table lamps… they send light everywhere, included where it may not be wanted. An LED based system, by contrast, precisely directly light like a flashlight beam, illuminating necessary areas and leaving unwanted zones dark
Slide 15: Application of Conventional Sources vs. LED 2
APPLICATION OF CONVENTIONAL SOURCES VS. LED 2 This popular photograph accurately depicts the ability of LED (on the left side) to create smooth, uniform lighting when compared to the High Pressure Sodium conventional fixtures on the right. Energy usage is about one half to one third that of the conv
Slide 16: LED Streetlighting
LED STREETLIGHTING Many LED systems result in high glare potential because of the need to project powerful beams of light at angles above the 45 degree glare zone. This is compounded by the cool white color temperature of high efficacy LEDs, perceived by many to be brighter than their warm color tem
Slide 17: Successful High-Efficiency Lighting Utilization
SUCCESSFUL HIGH-EFFICIENCY LIGHTING UTILIZATION •Proper Temperature: Most sources operate best at 70º F. LEDs operated above 70º decreases lumen output and ultimately LED life. Cool temperatures decreases the performance of fluorescent sources. •Give them good thermal management (heatsinks). Keeping
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