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
| Jan 29, 2014
Notre Dame to expand football stadium in largest project in school history
The $400 million Campus Crossroads Project will add more than 750,000 sf of academic, student life, and athletic space in three new buildings attached to the school's iconic football stadium.
| Jan 29, 2014
AIA honors 18 with 2014 Young Architects Award
Three recent BD+C "40 Under 40" winners are among the outstanding young architects recognized by the AIA.
| Jan 28, 2014
White Paper: How metal buildings deliver long-term value to schools
A new white paper from Star Building Systems outlines the benefits of metal buildings for public and private school building projects.
| Jan 28, 2014
First Look: BIG's Honeycomb building for Bahamas resort [slideshow]
BIG + HKS + MDA have unveiled the design for the new Honeycomb building and adjacent plaza in The Bahamas – a 175,000-sf residential facility with a private pool on each balcony.
| Jan 28, 2014
2014 predictions for skyscraper construction: More twisting towers, mega-tall projects, and 'superslim' designs
Experts from the Council on Tall Buildings and Urban Habitat release their 2014 construction forecast for the worldwide high-rise industry.
| Jan 28, 2014
16 awe-inspiring interior designs from around the world [slideshow]
The International Interior Design Association released the winners of its 4th Annual Global Excellence Awards. Here's a recap of the winning projects.
| Jan 28, 2014
Big Ten Conference opens swanky HQ and museum [slideshow]
The new mixed-use headquarters includes a museum, broadcast studios, conference facilities, office spaces, and, oh yeah, a Brazilian steakhouse.
| Jan 27, 2014
A climber's dream: Rock climbing hall planned near Iran's highest peak
Forget the rock climbing wall. A developer in Iran is building a rock climbing hall. That's right, an entire building dedicated to the sport, with more than 48,000 sf of program space.
| Jan 24, 2014
First look: Foster + Partners' new home for Yale School of Management [slideshow]
Edward P. Evans Hall, the new home of the Yale School of Management, has opened for business. The 242,000-sf facility was designed by Foster + Partners, with Gruzen Samton as architect of record.
| Jan 24, 2014
Reed Expansion Index predicts widespread economic improvement for the year
Reed's December Expansion Index stood at 1.48, indicating overall construction in the United States is expected to grow over the next 12 months.
