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|The University has been making strides
toward energy conservation with the “It All Adds Up” campaign, encouraging the University community to join an energy conservation pledge (save water, hit the lights, turn off electronics, and take the stairs).
Now, PTS is adding to the U’s list of energy conservation accomplishments with the installation of high-efficiency lighting in all parking structures on campus.
The first locations that were converted during December and January were Northrop Auditorium Garage and Church Street Garage. The third location, Oak Street Ramp, also started its upgrade in January and continues through March.
The rest of the parking structures will be upgraded over the next two years. Surface lots will be upgraded in 2014-15.
How It Began
This project started with an assessment of 13 parking structures on campus. A test in the 4th Street Ramp with sensors installed on different light fixtures showed that these lights were at full output for less than five percent of the hours in a day.
The result of the assessment and test is a move to two LED (light emitting diode) fixtures. These lights have been proven to be more
energy-efficient and significantly reduce long term energy costs while still complying with current lighting industry standards.
The annual energy savings compared to the existing energy usage is estimated at 52-58 percent (translating to an annual energy cost savings of approximately $350,000 per year if all covered level light fixtures are replaced in all of the parking structures).
The cost of the lighting retrofit is approximately $3.3 million.
These LED fixtures are estimated to last 23 years with 24/7 operation at full light output. That saves on maintenance and replacement costs as well.
New Features Added
Another aspect of this planned parking facility upgrade is the addition of two advanced sensor types: daylight-sensing and motion.
The first sensor is a daylight-sensing detector that analyzes the level of natural light inside above-ground parking structures and turns off lights during the day when adequate natural light exists to meet required lighting standards. Light fixtures more than 60 feet from a wall opening will continue to operate 24/7.
The second sensor is a motion sensor that detects vehicle movement and pedestrian activity and dims light fixtures when the parking facility is not occupied. These sensors will control light fixtures in large sections or blocks to avoid the strobe light effect of individual fixtures turning on one at a time. For safety and security purposes, light fixtures are dimmed to 25 percent of full light output as opposed to turning completely off.
Additionally, PTS is participating in a campus-wide lighting project that updates the lighting in lobbies and stairwells of parking facilities. That project is driven by Facilities Management’s Energy Unit.
While all these energy savings help boost the U’s conservation efforts, PTS plans to keep our mission promise of providing safe and convenient access to the University for everyone. Our customers’ personal safety and security is always our number one concern.
Our mission has always centered around the safety of those accessing the University of Minnesota campus. That will never change.
PTS has emergency call buttons in elevator lobbies and stairwells that connect directly with the Department of Central Security.
Security cameras on campus, including those located throughout parking facilities, are monitored 24 hours a day by the Department of Central Security.