Analysis of daylighting control systems in 20 office and public spaces in Minnesota and Wisconsin shows that while the automatic daylight harvesting schemes are helping to reduce lighting energy in the buildings, most are not achieving optimal performance, according to a new study by the Energy Center of Wisconsin (ECW).
According to ECW, the median daylighting control system studied was saving 23% of lighting energy, including impacts on heating and cooling. This translated to 915 kWh saved for every kW of lighting controlled. But the average effectiveness (the energy saved versus energy saved with ideal control) of the controls was only 51%. This meant that almost half of the potential savings from these controls was not captured due to imperfect controls operation. Even worse, four of the 20 spaces studied had zero savings.
The low level of effectiveness, says ECW, is evidence of a lack of controls execution. The findings show that successful implementation of automatic daylighting control requires a significant commissioning effort to reach full energy-savings potential.
Read the full daylighting commissioning report from the Energy Center of Wisconsin.
As part of the report, ECW developed a tip sheet on commissioning and calibration and function testing of lighting controls. Recommendations include assigning a single person of the construction team to be responsible for verifying completion of all steps in the daylighting commissioning process, and proper training of the building owner/operator on the controls equipment and systems. Download the tip sheet (PDF)
(http://www.ecw.org/project.php?workid=1&resultid=494)
Related Stories
| Mar 10, 2011
Steel Joists Clean Up a Car Wash’s Carbon Footprint
Open-web bowstring trusses and steel joists give a Utah car wash architectural interest, reduce its construction costs, and help green a building type with a reputation for being wasteful.
| Mar 10, 2011
How AEC Professionals Are Using Social Media
You like LinkedIn. You’re not too sure about blogs. For many AEC professionals, it’s still wait-and-see when it comes to social media.
| Mar 9, 2011
Hoping to win over a community, Facebook scraps its fortress architecture
Facebook is moving from its tony Palo Alto, Calif., locale to blue-collar Belle Haven, and the social network want to woo residents with community-oriented design.
| Mar 9, 2011
Winners of the 2011 eVolo Skyscraper Competition
Winners of the eVolo 2011 Skyscraper Competition include a high-rise recycling center in New Delhi, India, a dome-like horizontal skyscraper in France that harvests solar energy and collects rainwater, and the Hoover Dam reimagined as an inhabitable skyscraper.
| Mar 9, 2011
Igor Krnajski, SVP with Denihan Hospitality Group, on hotel construction and understanding the industry
Igor Krnajski, SVP for Design and Construction with Denihan Hospitality Group, New York, N.Y., on the state of hotel construction, understanding the hotel operators’ mindset, and where the work is.
| Mar 3, 2011
HDR acquires healthcare design-build firm Cooper Medical
HDR, a global architecture, engineering and consulting firm, acquired Cooper Medical, a firm providing integrated design and construction services for healthcare facilities throughout the U.S. The new alliance, HDR Cooper Medical, will provide a full service design and construction delivery model to healthcare clients.
| Mar 2, 2011
Design professionals grow leery of green promises
Legal claims over sustainability promises vs. performance of certified green buildings are beginning to mount—and so are warnings to A/E/P and environmental consulting firms, according to a ZweigWhite report.
| Mar 2, 2011
Cities of the sky
According to The Wall Street Journal, the Silk Road of the future—from Dubai to Chongqing to Honduras—is taking shape in urban developments based on airport hubs. Welcome to the world of the 'aerotropolis.'
| Mar 2, 2011
How skyscrapers can save the city
Besides making cities more affordable and architecturally interesting, tall buildings are greener than sprawl, and they foster social capital and creativity. Yet some urban planners and preservationists seem to have a misplaced fear of heights that yields damaging restrictions on how tall a building can be. From New York to Paris to Mumbai, there’s a powerful case for building up, not out.
| Mar 1, 2011
Smart cities: getting greener and making money doing it
The Global Green Cities of the 21st Century conference in San Francisco is filled with mayors, architects, academics, consultants, and financial types all struggling to understand the process of building smarter, greener cities on a scale that's practically unimaginable—and make money doing it.