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
| May 15, 2012
National Tradesmen Day set for Sept. 21
IRWIN Tools invites the nation to honor "The Real Working Hands that Build America and Keep it Running Strong".
| May 15, 2012
SAGE Electrochromics to become wholly owned subsidiary of Saint-Gobain
This deal will help SAGE expand into international markets, develop new products and complete construction of the company’s new, state-of-the-art manufacturing facility in Faribault, Minn.
| May 14, 2012
Codes harvest rainwater
IAPMO’s Green Plumbing and Mechanical Code Supplement could make rainwater harvesting systems commonplace by clearly outlining safe installation and maintenance practices.
| May 14, 2012
Plumbing research coalition to study drainline transport issue
The effort is aimed at determining if decreasing levels of water flow––caused by increasingly efficient plumbing fixtures––are sufficient to clear debris from plumbing pipes.
| May 14, 2012
SOM to break ground on supertall structure in China
The 1,740-feet (530-meter) tall tower will house offices, 300 service apartments and a 350-room, 5-star hotel beneath an arched top.
| May 14, 2012
Adrian Smith + Gordon Gill Architecture design Seoul’s Dancing Dragons
Supertall two-tower complex located in Seoul’s Yongsan International Business District.
| May 14, 2012
SMPS and Deltek announce alliance
A/E/C industry leaders partner to advance technology’s role in design firm marketing and business development.
| May 14, 2012
ArchiCAD e-Specs integration unveiled
Architects, engineers and construction professionals use InterSpec’s e-SPECS products on thousands of projects annually to maintain synchronization between construction models, drawings, and project specifications.
| May 11, 2012
2012 White Paper: High-Performance Reconstructed Buildings: The 99% Solution
Download the complete White Paper, Chapters 1-10
| May 11, 2012
Chapter 10 Action Plan: 18 Recommendations for Advancing Sustainability in Reconstructed Buildings
We offer the following recommendations in the hope that they will help step up the pace of high-performance building reconstruction in the U.S. and Canada. We consulted many experts for advice, but these recommendations are solely the responsibility of the editors of Building Design+Construction. We welcome your comments. Please send them to Robert Cassidy, Editorial Director: rcassidy@sgcmail.com.
