Bi-Level Demand-Sensitive LED Street Lighting Systems

Abstract

This report documents a solid-state lighting technology demonstration with a demand-sensitive feature at the Naval Surface Warfare Center (NSWC), Carderock Division (NSWCCD) in West Bethesda, MD in which light-emitting diode (LED) luminaires were substituted for existing High Pressure Sodium (HPS) street lighting units. This project was supported by the Department of Defense (DoD) under the Environmental Security Technology Certification Program (ESTCP). During the course of the project, Virginia Tech and Old Dominion University, working in collaboration with Echelon Corp., developed, deployed and evaluated operational performance of a smart bi-level demand-sensitive LED lighting system for outdoor street lighting applications that allows dimming as well traffic sensing capability through a centralized controller. The existing eight units of HPS lamps were monitored for 1 year to capture their electrical energy consumption and operational performance, including illumination level and color rendition index. The set of LED lamps, together with their sensing and control unit, were then installed; and post-installation monitoring was performed during the subsequent year. Results indicate a significant reduction in energy usage at about 74% electricity savings with the conversion of HPS to the demonstrated LED street lighting system. This is shown in Figure 1, where monthly electricity consumption (kilowatt hour [kWh]) of the HPS and LED street lighting systems during the monitoring period is compared. The data were recorded during a series of monitoring periods between January and December 2011 for the HPS system, and between January and December 2012 for the new LED system. The annual electricity savings of the LED as compared to its HPS counterparts were recorded at 11,060 kWh, which can be translated to avoided carbon dioxide (CO2) emissions of 16,081 pounds (lbs) during the same period.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2013
Accession Number
ADA602227

Entities

Organizations

  • Environmental Security Technology Certification Program

Tags

Communities of Interest

  • Energy and Power Technologies
  • Human Systems

DTIC Thesaurus Topics

  • Business Administration
  • Carbon Dioxide
  • Color Temperature
  • Cost Analysis
  • Department Of Defense
  • Detectors
  • Electric Power
  • Energy Conservation
  • Energy Consumption
  • Energy Efficiency
  • Engineering
  • Environmental Security
  • Maintenance
  • Maintenance Costs
  • Management Personnel
  • Organizational Structure
  • Surface Warfare

Fields of Study

  • Engineering

Readers

  • Maritime Security/Maritime Homeland Security
  • Technical Research and Report Writing.
  • Vision Science/Vision Psychology/Cognitive Neuroscience.