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
| Dec 9, 2012
AEC professionals cautiously optimistic about commercial construction in ’13
Most economists say the U.S. is slowly emerging from the Great Recession, a view that was confirmed to some extent by an exclusive survey of 498 BD+C subscribers whose views we sought on the commercial construction industry’s outlook on business prospects for 2013.
| Dec 7, 2012
Structural glazing sealant protects solar-rooftop stadium in Taiwan
Designers of the Kaohsiung World Games Main Stadium in Gaoxiong, Taiwan, powered by almost 9,000 rooftop solar panels, required an effective panel fixing design offering optimum energy transfer rate, plus thermal and weathertight performance. Dow Corning specialists recommended a four-sided structural sealant solution featuring Dow Corning 983 Structural Glazing Sealant.
| Dec 6, 2012
Ziegler Cooper names Soto as Director of Design, Broadens Design Capabilities
Soto will oversee design efforts, bringing a high level of quality and problem solving capabilities through active engagement with clients and studios firm wide.
| Dec 5, 2012
Gilbane publishes Winter 2012 construction economic report
Report outlines impact of recent events; predicts continued movement, while slow, toward recovery.
| Dec 5, 2012
Gehry-designed New York City tower receives Emporis Skyscraper Award
8 Spruce Street is now the third New York tower to win the Emporis Skyscraper Award.
| Dec 4, 2012
MKK’s Denver Human Services Eastside Building wins ACEC Excellence Award
MKK provided mechanical, plumbing and fire protection consulting services on this LEED-NC Gold project.
| Dec 4, 2012
Thornton Tomasetti opens new office in São Paulo, Brazil
The move to São Paulo is strategic and timely, as the country continues preparations for the 2014 World Cup and 2016 Olympic Games in Rio de Janeiro.
| Dec 4, 2012
Greenhorne & O’Mara signs letter of intent to join Stantec
Acquisitions of C3TS and Architecture 2000 also completed.
| Dec 4, 2012
Sto Corp. announces new distributor in the Carolinas
Company will now have coverage in several parts of North Carolina.