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
| Nov 11, 2012
AIA: Building Envelope
Preventing and treating failure in glazed curtain wall systems. Earn 1.0 AIA/CES learning units by studying this article and successfully completing the online exam.
| Nov 11, 2012
Greenbuild 2012 Report: Hospitality
Hotel boom signals good news for greener lodging facilities
| Nov 11, 2012
Greenbuild 2012 Report: Government & Military
Public sector remains a bastion of sustainability
| Nov 11, 2012
Greenbuild 2012 Report: Healthcare
Green medical facilities extend beyond hospital walls
| Nov 11, 2012
Greenbuild 2012 Report: Multifamily
Sustainably designed apartments are apples of developers’ eyes
| Nov 11, 2012
Greenbuild 2012 Report: Higher Education
More and more colleges and universities see sustainainably designed buildings as a given
| Nov 11, 2012
Greenbuild 2012 Report: K-12
High-performance schools put ‘sustainability’ in the lesson plan
| Nov 7, 2012
John Portman & Associates awarded new high rise in China
108-story building to rise in Nanning, the Capital City of Guangxi Province.
| Nov 7, 2012
Two Thornton Tomasetti projects receive 2012 International Architecture Awards for Best Global Design
The awards, presented by the Chicago Athenaeum Museum of Architecture Design, the European Center for Architecture Art Design, and Urban Studies and Metropolitan Arts Press, Ltd., recognize excellence in architecture and urban planning.