SFO’s Airfield Operations Facility (AOF), the world’s first zero net energy (ZNE) airport facility, had been recently occupied. The building includes a 136 kW rooftop solar array, runs on 100% carbon-free electricity and uses zero fossil fuels for its 24/7 operations. Shortly after occupancy, the building energy use was being measured 50% higher than performance models during the design phase. The team at SFO needed a way to quickly diagnose the reasons for the over-usage but didn’t have visibility into the building’s plugs.
"Keewi was able to provide us with invaluable information on how our campus uses energy. This information has helped guide the design process for new buildings and how to manage our occupants’ relationship with energy. Keewi is an integral tool in creating a culture of conservation, which is imperative for our organization to reach its ambitious energy reduction goals."
Keewi upgraded plugs at AOF and enabled easy and real-time plug data collection in offices, break rooms, an exercise room, and a training center at AOF. Plug analysis at SFO identified the following findings:
Refrigerated vending machines, desktop computers and LCD monitors are responsible for the majority of plug usage (77%) in the building
While a 24/7 building, utilization of plugs is highest during normal business hours when the building is at its highest occupancy
Plug data from the treadmill indicate a maximum utilization of twice per day
With these new insights, the SFO team has been able to continually improve the performance of their ZNE building and maintain certifications.
Student residents reported 60% self-rating in understanding of personal energy
Student residents reported 100% self-rating in understanding of personal energy
Concession appliances were left on 24/7 during dark days
Centralized control of concession appliances with a 75% potential for savings
52 hrs of manual plug inventorying per building
17X faster plug data collection