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Three Zeros Partners

  • Energy Services
  • Energy Management
  • Transportation and Parking

Project Highlights

Dogwood Parking Deck – LED Upgrade (completed FY 2016)

  • Total Project Cost: $3,000,000
  • Energy Reduction, actual: 3,134,497 kBtu (annual average over 2-year period)
  • Energy Reduction: 56% (average over 2 years)
  • Energy Savings, actual: $51,570 (annual average over 2-year period)
  • Energy Savings: 53.4% (average over 2-year period)
  • Economic Analysis Method: Life Cycle Cost over 20 Year Period had LEDs at lower cost than HPS (high-pressure sodium) or MH (metal halide) options

Expanded use of LED lights on the UNC campus is an effective energy savings initiative. Energy Management works with campus partners to identify spaces that are good candidates for LED lighting upgrades. Potential target areas are increasing due to changes in the LED lighting industry, including expanded product types, new retrofit options, and lower product costs. Parking decks are good candidates because their lights remain on 24/7.

Based on the results on an engineering study, UNC Transportation selected Dogwood Deck as the first LED Lighting Upgrade for the UNC parking decks. This was a large capital project that addressed electrical wiring and conduit deficiencies in addition to the LED fixture installation. To evaluate the energy savings, Energy Management used a Life Cycle Cost Analysis (LCCA) over a twenty-year period and only considered costs directly related to the fixture replacement. The LCCA compared retention of the existing high-pressure sodium fixtures with new LEDs and new metal halide. The LCCA demonstrated the LEDs had the lowest life cycle cost and a Saving-to-Investment ratio (SIR) of 1.99, meaning that the project will pay for itself. UNC Transportation is moving forward with LED lighting upgrades in more UNC parking decks.