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Bi-Level Demand-Sensitive LED Street Lighting Systems

Bi-Level Demand-Sensitive LED Street Lighting Systems. Insert base name. Technology Description.

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Bi-Level Demand-Sensitive LED Street Lighting Systems

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  1. Bi-Level Demand-Sensitive LED Street Lighting Systems Insert base name

  2. Technology Description • Smart bi-level demand-sensitive LED lighting system for outdoor street lighting applications, allows dimming as well as vehicle and pedestrian traffic sensing capability through a centralized controller

  3. How Does It Work

  4. How Does It Work Continued • LEDs are turned ON after the sunset (with a photocell sensor), and its light intensity is dimmed in two stages (80% intensity from 9pm to 11pm and 60% intensity from 11pm to 4am) to allow additional energy savings. • As soon as foot/vehicle traffic is detected, the light intensity is set back to 100% for about five minutes. All LEDs are turned OFF simultaneously at sunrise. • Both Intensity levels and activation times are adjustable.

  5. Benefits of the Technology • Energy saving, better light quality, and infrastructure savings • Streetlight controllers to enable bi-level and demand-sensitive features • The integration of traffic sensors for detecting moving traffic • The use of a smart server to perform light control

  6. Technology Success Stories • Technology has been successfully demonstrated by ESTCP at Naval Surface Warfare Center (NSWC), Carderock Division in West Bethesda, MD • Demonstrated energy savings from baseline system exceeded 70% • Light-emitting diode (LED) luminaires were substituted for existing High Pressure Sodium (HPS) street lighting units

  7. Potential Challenges and Solutions • Restrictions on wireless communications • The facility must review and approve the operation of some wireless equipment under frequency management and cyber security regulations. A system data sheet must be completed for each wireless transmitting and receiving component and submitted prior to installation to the competent controlling agency. • Restrictions on installation contractors • All electrical work on the base must be performed by State licensed and bonded contractors who have appropriate clearances to perform activities on the installation.

  8. Sample Financial Considerations • Estimated budget Costs • Annual electricity savings of the LED as compared to its HPS counterparts were recorded at 11,060 kWh • Simple payback period 6.0 • Savings-to-Investment Ratio (SIR) 2.15

  9. Bottom Line • Pros • Superior luminous efficacy • Superior light quality • Longer life • Reduced Maintenance Expenses • Instantaneous response time • Reduction in waste disposal • Cons • Initial Acquisition Costs

  10. Where to Learn More • Mr. Tim Tetreault, ESTCP Energy and Water Program Manager, 571-372-6397 • SERDP-ESTCP Website, https://serdp-estcp.org • Mr. Greg Cancila, POC at Carderock, 215-897-7607, Gregory.cancila@navy.mil • Dr. Saifur Rahman, POC at Virginia Tech, 571-858-3300, srahman@vt.edu

  11. Backup Slides

  12. Demonstration Performance Objectives

  13. Demonstration Performance Objectives

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