SOLAR TODAY - May 2011 - Innovative Design

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photo essay low-energy design The Cost-Efficient Zero-Net Office Building Finished Research Support Facility with racking in place for 1.6 megawatts of photovoltaic modules. By Seth Masia department of energy / NREL Using off-theshelf technology, NREL’s new LEED Platinum facility makes as much energy as it uses. When the National Renewable Energy Laboratory (NREL) set out to build a new Research Support Facility — basically, a set of administrative offices — the goal was to move the staff of 825 out of existing conventional office buildings using energy at the rate of 91,000 Btu per square foot per year — expressed as 91 kBtu/ft 2 /yr (979 kBtu/m 2 /yr). The goal: cut energy use by 65 percent, to 32 kBtu/ft 2 /yr (344kBtu/m 2 /yr), and make that energy with renewable technologies, right on site. In theory, a new zero-net-energy office building might save the Department of Energy something like $80,000 a year in heating, lighting, air-conditioning and data-center power costs. Further, the new building was to use off-the-shelf technology and come in for a total budget of $65 million, including design work and furnishings. The design-build contract went to a partnership of RNL Design, an architectural firm with offices in Los Angeles, Denver, Phoenix and Abu Dhabi, and Haselden Construction, of Centennial, Colo. Seth Masia (smasia@solartoday.org) is deputy editor at SOLAR TODAY. When the LEED Platinum project came in on schedule and on budget last fall at 222,000 square feet (20,650 square meters), finished cost worked out to 288 per square foot ($3,096 per square meter), roughly 15 percent less than the cost of the LEED Silver Commerce City Civic Center, built 18 miles away in 2007. Shanti Pless, LEED AP and senior research engineer at NREL, has been monitoring the building’s performance since the first staffers moved in in October 2010. The addition of a small server farm — it’s the data center for several NREL buildings — bumped the total energy budget up to 35 kBtu/ ft 2 /yr — but Pless reports that midwinter performance is on target for net-zero energy. Before the summer cooling season, the 1.6-megawatt photovoltaic system will be complete and ready to drive the ventilation load. Pless is confident the netzero goal will be met year-round. Haselden is now erecting the 138,000-square-foot expansion wing, scheduled for completion in October. It will house another 500 employees. 50 May 2011 SOLAR TODAY solartoday.org Copyright © 2011 by the American Solar Energy Society Inc. All rights reserved.
EmPowering the world with... Renewable Energy In May 2012, ASES will join with the World Renewable Energy Network, along with other groups, for the: WORLD RENEWABLE ENERGY FORUM MAY 14-19, 2012 DENVER, COLORADO BECOME A PART OF IT! Earn 18+ NABCEP Credits Hands-On Installation Labs Entry Level and Advanced Tracks SOLAR and YOU TRAINING! US Solar Market in 2010: 96% growth rate and $4.1 billion in sales* An Unbeatable Networking Opportunity Intensive two day tracks are provided by the leading unbiased solar education provider, National Solar Trainers. After training, you’ll put your new skills to work right away, making the connections to launch your career or start your business at the 2011 National Solar Conference. “The Must-Go-To Professional Development Event of the Year." Registration Opens on March 25th. www.nationalsolarconference.org *Solarbuzz.com Copyright © 2011 by the American Solar Energy Society Inc. All rights reserved. solartoday.org SOLAR TODAY May 2011 51
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