David Glickson, NREL
June 11, 2014 | 2 Comments
Beyond LEED — The Net-Zero Energy Research Support Facility
As the Energy Department's National Renewable Energy Laboratory (NREL) celebrates the certification of three new LEED Platinum buildings, bringing the total number of Platinum certified buildings on its campus to six, another important milestone on NREL's sustainable campus was also achieved: NREL's Research Support Facility (RSF) recently completed a verified one year of performance as a net-zero energy building.
A net-zero energy building is one that, over the course of a full year, produces more energy than it consumes.
The RSF, a LEED Platinum certified 360,000-square-foot Class A office building that houses approximately 1,300 NREL and Energy Department staff as well as a data center, accomplished this through a combination of energy efficiency technologies used in the building, effective operations and management of the building, and onsite electricity generation from a 2.6-megawatt solar photovoltaic (PV) system on the roof of the building and adjacent parking areas.
"We made a commitment to design and build a building that could reach net zero in operations," NREL Senior Energy Efficiency Research Engineer Shanti Pless said. "The design-build team delivered to us a well-designed, well-engineered, and well-constructed building that was able to support that goal. With the addition of the PV system we felt that we could successfully offset all of our annual energy use. Through active energy management and real-time benchmarking tools, we're very proud that we were able to achieve this important milestone."
Like the rest of the NREL campus, the RSF was designed and built with the intention of being a model for how building projects can incorporate energy efficiency strategies and technologies, and in the case of the RSF how projects can be made to be net-zero energy ready. The NREL researchers involved in the project made it accessible to anyone by compiling and documenting their experiences in energy performance-based commercial building acquisition and the adoption of energy-saving building technologies.
"There's a growing interest in net-zero energy buildings now that it is getting more cost effective and the industry is beginning to understand it better," Pless said. "The cost of PV and energy-efficient building materials like LED lighting have come down dramatically in the last few years, and that has made the idea of building for net zero much more approachable. As a result, there is an expanding level of expertise and capability out there for delivering buildings for net-zero energy operations. This is still cutting edge, but it is scaling up and heading toward the mainstream."
NREL is a consistent leader in bringing high-performance, energy-efficient building projects to life on its campus. In 2006 NREL laid claim to having the only LEED Platinum federal building with its Science & Technology Facility. Today, LEED Platinum federal buildings are becoming commonplace, including six on the NREL campus alone. Now, NREL again demonstrates its leadership by being the home of the very first federal building verified to achieve net-zero energy performance. However, unlike a green building certification that happens once, net-zero energy is something that is ongoing and must be achieved annually.
"One of the great things about net-zero energy is that it's an operations target, not a design target, that requires ongoing management to reach from year to year," said Pless. "This keeps our building managers, engineers, and occupants constantly thinking about how we use energy and seeking ways to improve our performance. We'll need to keep doing that to assure that the building meets net-zero energy operational goals year after year. We look forward to that opportunity."
Researchers in NREL's Commercial Buildings research program have installed meters in all new buildings and are collecting a massive amount of performance data. They are now developing tools that can put this data into action to the benefit of building developers and operators everywhere.
"We are trying to align building decision makers with the data that we are collecting," Pless said. "By creating useful tools to help them take advantage of building data, we are providing them with the critical information that they need to make good decisions that will further enhance building performance and occupant comfort."
NREL has developed a new tool called the "NREL Energy Story" that serves the dual purpose of telling the story of NREL's sustainable campus to the public as well as serving as a management tool that allows NREL engineers to analyze campus energy performance in real time and identify problems quickly.
"We've essentially created an energy management tool for our campus with an education component layered into it," said NREL Strategic Energy Analysis Center Principal Project Lead Mark Ruth. "It allows us to improve our story at the same time we are telling our story. It's a one-of-a-kind tool that provides great benefit both internally and externally."
The tool is a real-time visualization of energy production and consumption on the NREL campus. It includes modules for electricity, heating and cooling, and fuels. It provides a big-picture view of the entire campus, as well as detailed analysis of specific areas such as lighting or plug loads within a section of a building. For the public, it compares NREL's campus energy use to that of a typical campus that lacks the type of high-performance buildings found at NREL. It also includes a series of infographics that can show users what the potential impacts and cost savings of energy efficiency applications could be for the nation, or for a home.
"This tool helps the public understand the impact of their energy choices, which will hopefully guide their decision making in the future to use energy more wisely," Ruth said. "We strive to be a ‘living laboratory' here at NREL, and this tool helps to bring this to life in a way that everyone can understand. It clearly demonstrates how the lab improves its own energy use and the potential benefits others can realize if they to implement these strategies in their homes or communities."
Six LEED Platinum Buildings
Recently, at a dedication ceremony held on the NREL campus, the U.S. Green Building Council (USGBC) recognized NREL's efforts with Leadership in Energy & Environmental Design (LEED) Platinum certification for three of its newest campus facilities, including the recently opened Energy Systems Integration Facility (ESIF).
The USGBC's LEED program is a green building certification that recognizes best-in-class building strategies and practices. Building projects must satisfy prerequisites and earn points to achieve different levels of certification. A Platinum certification is the highest level in the program.
In addition to the ESIF, the USGBC also recognized NREL's new Café and South Site Entrance Building for achieving Platinum status. With these new certifications, NREL can now lay claim to six LEED Platinum certified buildings on its Golden campus, including the award-winning Research Support Facility, which was recently verified to have performed for a full year as anet-zero energy building.
"We are extremely proud of the campus we have designed and built here at NREL and the recognition that we have received for our efforts," said NREL Deputy Director and Chief Operating Officer Ken Powers. "This campus will provide our world-class research staff with the resources and facilities they need to support our clean energy mission, as well as serve as an example of how these technologies and strategies can be effectively applied."
Sustainability as a Core Value
NREL is a recognized leader in sustainability, with practices that are incorporated into the mission and fully integrated into all facets of the operation of the laboratory. When planning the design of the NREL campus, it went without saying that sustainability would be a key consideration.
Sustainability professionals were part of all integrated project teams throughout the process, and efforts to make the NREL campus as sustainable as possible guided every decision. The use of sustainable building products, technologies, and practices helped to garner the points necessary to achieve the LEED Platinum certification for all new buildings.
"We underwent a lot of growth in a short period of time, and all of the people involved in making that happen adopted the mission and value system of the laboratory in regards to sustainability throughout the process and never lost focus on it," NREL Sustainability Program Director Frank Rukavina said. "It makes our job, as sustainability professionals, a lot easier when everyone involved understands the priority and is on board from the beginning to make these building projects as sustainable as possible."
Examples of sustainability practices incorporated into the new buildings are numerous. For the newly Platinum certified buildings, these include comprehensive recycling and composting programs, native and xeriscape vegetation, locally sourced food for the new cafeteria, water conservation efforts for the commercial kitchen in the new cafeteria, storm water recycling strategies, and building materials made of recycled materials.
"Everyone looks to NREL to be a leader on these issues now and in the future. We have a responsibility within our basic mission to set the best possible example and to be a model for what a campus could be and should be," Rukavina said. "We've excelled because we've committed to it and we've created a campus that showcases our mission and our values as an organization. We have a population here at NREL that takes energy efficiency and sustainability personally and seriously. This drives us to continued excellence and challenges us to always be as sustainable as we possibly can."
Aerial view of NREL's South Table Mountain campus with its six LEED Platinum buildings in view. NREL wants its campus and buildings to serve as a model for how the commercial buildings and campuses of the future should be built. Photo by Dennis Schroeder, NREL.