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
Market Data | May 17, 2016
Modest growth for AIA’s Architecture Billings Index in April
The American Institute of Architects reported the April ABI score was 50.6, down from the mark of 51.9 in the previous month. This score still reflects an increase in design services.
Architects | May 16, 2016
AIA and HOK partner to advance Design and Health Research Consortium
The groups' key priority is to identify and develop practice-focused opportunities for funded research, publications, and tools in the area of design and public health.
Senior Living Design | May 16, 2016
Perkins Eastman releases white paper on biophilic design in senior living
The paper highlights some of the firm's top projects that feature biophilic design, a sustainable architecture strategy that connects people with nature.
Architects | May 16, 2016
3 strategies to creating environments that promote workplace engagement
VOA's Pablo Quintana writes that the industry is looking for ways to increase engagement through a mix of spaces suited to employees' desire for both privacy and connection.
Architects | May 11, 2016
AIA to create a resilience curriculum for architects
The program will teach resilient design and decision-making on hazard mitigation, climate adaptation and community resilience.
Retail Centers | May 10, 2016
5 factors guiding restaurant design
Restaurants are more than just places to eat. They are comprising town centers and playing into the future of brick-and-mortar retail.
AEC Tech | May 9, 2016
Is the nation’s grand tech boom really an innovation funk?
Despite popular belief, the country is not in a great age of technological and digital innovation, at least when compared to the last great innovation era (1870-1970).
Sports and Recreational Facilities | May 6, 2016
NBA’s Atlanta Hawks to build new practice center with attached medical facilities
The team will have easy access to an MRI machine, 3D motion capture equipment, and in-ground hydrotherapy.
Big Data | May 5, 2016
Demand for data integration technologies for buildings is expected to soar over the next decade
A Navigant Research report takes a deeper dive to examine where demand will be strongest by region and building type.
Urban Planning | May 4, 2016
Brookings report details how different industries innovate
In the new report, “How Firms Learn: Industry Specific Strategies for Urban Economies,” Brookings' Scott Andes examines how manufacturing and software services firms develop new products, processes, and ideas.
