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
| Feb 14, 2014
ASHRAE, Green Grid team up on energy-efficiency guide for data centers
Vendor-neutral publication examines aspects of the popular power usage effectiveness (PUE) metric.
| Feb 14, 2014
Scrap tires used to boost masonry blocks at Missouri University of S&T
Research could lead to blocks that use waste material and have seismic and insulating benefits.
| Feb 14, 2014
Giant interactive pinwheel adds fun to museum exterior
The proposed design for the Santa Cruz Museum of Art and History features a 10-foot pinwheel that can be activated by passersby.
| Feb 14, 2014
First look: Kentucky's Rupp Arena to get re-clad as part of $310M makeover
Rupp Arena will get a 40-foot high glass façade and a new concourse, but will retain many of its iconic design elements.
| Feb 14, 2014
Must see: Developer stacks shipping containers atop grain silos to create student housing tower
Mill Junction will house up to 370 students and is supported by 50-year-old grain silos.
| Feb 14, 2014
The Technology Report 2014: Top tech tools and trends for AEC professionals
In this special five-part report, Building Design+Construction explores how Building Teams throughout the world are utilizing advanced robotics, 3D printers, drones, data-driven design, and breakthroughs in building information modeling to gain efficiencies and create better buildings.
| Feb 14, 2014
Crowdsourced Placemaking: How people will help shape architecture
The rise of mobile devices and social media, coupled with the use of advanced survey tools and interactive mapping apps, has created a powerful conduit through which Building Teams can capture real-time data on the public. For the first time, the masses can have a real say in how the built environment around them is formed—that is, if Building Teams are willing to listen.
| Feb 13, 2014
University officials sound off on net zero energy buildings
As part of its ongoing ZNE buildings research project, Sasaki Associates, in collaboration with Buro Happold, surveyed some 500 campus designers and representatives on the top challenges and opportunities for achieving net-zero energy performance on university and college campuses.
| Feb 13, 2014
3 keys to designing freestanding emergency departments
Having physically disassociated from a central hospital, FEDs must overcome the particular challenges associated with a satellite location, namely a lack of awareness, appeal, and credibility. Gresham, Smith & Partners' Kristin Herman-Druc offers three keys to success.
| Feb 13, 2014
Why you should start with a builder
They say the best way to eat an elephant is one bite at a time. Expanding your building or constructing a new structure for your business, church, or school isn’t all that different. Attacking it is best done in small, deliberate pieces.