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
Building Team Awards | May 27, 2016
Big police academy trains thousands of New York's finest
The Police Training Academy in Queens, N.Y., consists of a 480,000-sf academic/administration building and a 240,000-sf physical training facility, linked by an aerial pedestrian bridge.
Building Team Awards | May 26, 2016
Cimpress office complex built during historically brutal Massachusetts winter
Lean construction techniques were used to build 275 Wyman Street during a winter that brought more than 100 inches of snow to suburban Boston.
Building Team Awards | May 25, 2016
New health center campus provides affordable care for thousands of Northern Californians
The 38,000-sf, two-level John & Susan Sobrato Campus in Palo Alto is expected to serve 25,000 patients a year by the end of the decade.
Architects | May 24, 2016
Lissoni Architettura’s NYC Aquatrium takes first place in New York City Waterfront Design competition
NYC Aquatrium was selected from among 178 proposals from 40 countries as the winner of Arch Out Loud’s NYC Aquarium & Public Waterfront design competition
Building Team Awards | May 24, 2016
Los Angeles bus depot squeezes the most from a tight site
The Building Team for the MTA Division 13 Bus Operations and Maintenance Facility fit 12 acres’ worth of programming in a multi-level structure on a 4.8-acre site.
Building Team Awards | May 23, 2016
'Greenest ballpark' proves a winner for St. Paul Saints
Solar arrays, a public art courtyard, and a picnic-friendly “park within a park" make the 7,210-seat CHS Field the first ballpark to meet Minnesota sustainable building standards.
Architects | May 20, 2016
NCARB survey indicates continued growth of U.S. architects
The number of U.S. architects surpassed 110,000 in 2015, a 2% increase from the previous year.
Multifamily Housing | May 19, 2016
Architect Jean Nouvel designs flood-resilient Monad Terrace in Miami Beach
A man-made lagoon with lush vegetation at the base of the complex is expected to adapt to climate change and rising sea levels.
Building Team Awards | May 19, 2016
Chinatown library unites and serves two emerging Chicago neighborhoods
The 16,000-sf, pebble-shaped Chinatown Branch Library was built at the intersection of new and old Chinatown neighborhoods. The goal is for the building to unite the communities and serve as a catalyst for the developing area.
Building Team Awards | May 19, 2016
NYC subway station lights the way for 300,000 riders a day
Fulton Center, which handles 85% of the riders coming to Lower Manhattan, is like no other station in the city’s vast underground transit web—and that’s a good thing.
