New Buildings Institute (NBI) has developed the first ever set of plug load energy use metrics, which will allow commercial building owners and managers to more easily gain insight into their buildings’ energy use and become more energy efficient. Earlier this year, PECI used the NBI metrics to assess plug load energy use at PECI headquarters in the First and Main building in downtown Portland, Oregon. The study, which informed an energy-saving campaign, resulted in an 18 percent kWh reduction of PECI’s plug load.
Review New Buildings Institute Metrics, “Methodology for Reporting Commercial Office Plug Load Energy Use” and PECI case study, “Analyzing Plug Loads.”
According to the Energy Information Agency, plug load – which is defined as electricity use by equipment that plugs into a building’s electrical outlets – is one of the fastest-growing sources of energy use in commercial buildings. In typical offices, 15 to 20 percent of energy use can be attributed to the plug load of computers, monitors, printers, desk lamps, telephones, etc. In buildings with HVAC and/or lighting systems that have been upgraded or improved to be more energy-efficient, plug load can reach as high as 50 percent of total energy use.
The intent of NBI’s new metrics is to set a benchmark for plug load energy use and make it easier for building owners and managers to spot opportunities to improve energy efficiency. The methodology allows an apples-to-apples comparison of plug load energy use across commercial buildings, even if they have vastly different plug load makeups and characteristics.
PECI helped NBI test the theories behind their metrics during a study conducted in the Portland offices of PECI. PECI’s LEED Platinum office is equipped with an energy management system that allows circuit-level monitoring of energy use throughout the office space. This fact, coupled with PECI’s commitment to the study, practice and influence of responsible energy management, made the site – and the pairing – ideal.
NBI’s metrics showed that PECI’s plug load performance during business hours was already quite good, with numbers comparable to the metrics’ lowest reference value. Overnight, however, PECI’s plug load rated more poorly, with values above the metrics’ median.
“We discovered our higher overnight plug load was primarily due to people leaving their computers in ‘sleep mode’ when they left the office for the day,” said Joan Effinger, Engineering Manager at PECI. “We were excited to use the findings as an opportunity to improve.” PECI launched an internal campaign to motivate people to completely shut off their computers at the end of the day, which contributed to an 18 percent kWh reduction of plug load.
“It was very valuable to conduct such a successful test in a real-world situation,” said Cathy Higgins, Research Director of NBI. “Hopefully this is the first of many cases when people use these new metrics to improve the performance of buildings and reduce energy and cost.”
[1] Plug loads are a part of what is known as Miscellaneous Electrical Loads (MELS)
About PECI
PECI is a nonprofit corporation dedicated to creating the new energy economy. We are leaders in the field of energy resource management, with expertise in designing and implementing energy efficiency programs for utility and government agency clients. Our work helps millions of residential, commercial and industrial utility customers reliably save energy and money. We were founded in 1979 in Portland, Oregon and currently work with clients nationwide. To learn more, visit www.peci.org.
About NBI
Established in 1997, New Buildings Institute (NBI) has been a driving force in advancing energy code stringency, most notably with the adoption of the 2012 International Energy Conservation Code (IECC), which was based largely on NBI's Core Performance Guide--a prescriptive approach to high performance commercial buildings. The organization also advocates for measuring building energy performance in occupancy rather than relying on modeled predictions to assess efficiency levels, and has become a clearinghouse on zero-net energy policies and practices. To learn more about NBI go towww.newbuildings.org or call 360.567.0950.
Related Stories
Retail Centers | Mar 10, 2015
Retrofit projects give dying malls new purpose
Approximately one-third of the country’s 1,200 enclosed malls are dead or dying. The good news is that a sizable portion of that building stock is being repurposed.
Retail Centers | Mar 10, 2015
Orlando's Skyscraper to be world's tallest roller coaster
The Skyscraper is expected to begin construction later this year, and open in 2016. It will stand at 570 feet.
Museums | Mar 9, 2015
Architecture based on astronomy principles for new planetarium in Shanghai
The ancient Chinese civilization left some of the earliest records of humans studying the stars and skies. To exhibit this long history, a new planetarium and astronomy museum is planned for construction in Shanghai.
Architects | Mar 9, 2015
Study explores why high ceilings are popular
High ceilings give us a sense of freedom, new research finds
Cultural Facilities | Mar 9, 2015
London council nixes plans to rebuild the Crystal Palace
Plans for the new Crystal Palace Park were scrapped when the city and the project's developer could come to an agreement before the 16-month exclusivity contract expired.
Office Buildings | Mar 7, 2015
Chance encounters in workplace design: The winning ticket to the innovation lottery?
The logic behind the push to cultivate chance encounters supposes that innovation is akin to a lottery. But do chance encounters reliably and consistently yield anything of substance?
Architects | Mar 6, 2015
Study suggests our brains prefer curvy architecture
A research team at the University of Toronto at Scarborough worked with several European designers to see what sort of spaces pleases our brains more. Their finding: People are far more likely to call a room beautiful when its design is round instead of linear.
Justice Facilities | Mar 5, 2015
New courthouse blossoms into a civic space for one California town
The building's canopy suggests classical courthouse features of front porch and portico. It also helps connect the building with a public plaza that has re-centered civic activity and public gathering for the town.
Justice Facilities | Mar 5, 2015
State of the state: How state governments are funding construction projects
State budget shortfalls are making new construction and renovation projects a tough sell, leading lawmakers to seek alternative funding for these jobs.
Museums | Mar 5, 2015
A giant, silver loop in Dubai will house the Museum of the Future
The Sheikh of Dubai hopes the $136 million museum will serve as an incubator for ideas and real designs—a global destination for inventors and entrepreneurs.
