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
| Sep 18, 2014
Final designs unveiled for DC's first elevated park
OMA, Höweler + Yoon, NEXT Architects, and Cooper, Robertson & Partners have just released their preliminary design proposals for what will be known as the 11th Street Bridge Park.
| Sep 17, 2014
Arquitectonica's hairpin-shaped tower breaks ground in Miami
Rising above Biscayne Bay, the 305-meter tower will include three viewing decks, a restaurant, nightclub, and exhibition space.
| Sep 17, 2014
Atlanta Braves break ground on mixed-use ballpark development
SunTrust Park will be constructed by American Builders 2017, a joint venture between Brasfield & Gorrie, Mortenson Construction, Barton Malow Company, and New South Construction.
| Sep 17, 2014
The doctor is in: New consortium to fund research of design's influence on public health
The AIA Design & Health Research Consortium has organized its design and health initiative around six evidence-based approaches.
| Sep 17, 2014
New developments in data center design
From the dozen or so facilities housing Google’s 900,000 servers to the sprawling server farms of Facebook to Amazon’s seven sites scattered around the world, today’s data centers must accommodate massive power demand, high heat loads, strict maintenance protocols, and super-tight security. This AIA Discovery course is worth 1.0 AIA CES HSW learning units.
| Sep 17, 2014
New hub on campus: Where learning is headed and what it means for the college campus
It seems that the most recent buildings to pop up on college campuses are trying to do more than just support academics. They are acting as hubs for all sorts of on-campus activities, writes Gensler's David Broz.
Sponsored | | Sep 17, 2014
The balance between innovation and standardization – How DPR Construction achieves both
How does DPR strike a balance between standardization and innovation? In today’s Digital COM video Blog, Sasha Reed interviews Nathan Wood, Innovator with DPR Construction, to learn more about their successful approach to fueling innovation. SPONSORED CONTENT
| Sep 16, 2014
Ranked: Top hotel sector AEC firms [2014 Giants 300 Report]
Tutor Perini, Gensler, and AECOM top BD+C's rankings of design and construction firms with the most revenue from hospitality sector projects, as reported in the 2014 Giants 300 Report.
| Sep 16, 2014
Studies reveal growing demand for LEED-credentialed professionals across building sector
The study showed that demand for the LEED Accredited Professional and LEED Green Associate credentials grew 46 percent over a 12-month period.
| Sep 16, 2014
Shigeru Ban’s design wins Tainan Museum of Fine Arts competition
Pritzker Prize-winning architect Shigeru Ban has won an international competition organized by The Tainan Museum of Art in Taiwan. Ban's design features cascading volumes with an auditorium, classrooms, and exhibition galleries.
