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
BIM and Information Technology | Jan 29, 2015
Lego X by Gravity elevates the toy to a digital modeling kit
With the Lego X system, users can transfer the forms they’ve created with legos into real-time digital files.
Energy Efficiency | Jan 28, 2015
An urban wind and solar energy system that may actually work
The system was designed to take advantage of a building's air flow and generate energy even if its in the middle of a city.
Multifamily Housing | Jan 27, 2015
Multifamily construction, focused on rentals, expected to slow in the coming years
New-home purchases, which recovered strongly in 2014, indicate that homeownership might finally be making a comeback.
Office Buildings | Jan 27, 2015
London plans to build Foggo Associates' 'can of ham' building
The much delayed high-rise development at London’s 60-70 St. Mary Axe resembles a can of ham, and the project's architects are embracing the playful sobriquet.
Multifamily Housing | Jan 22, 2015
Sales of apartment buildings hit record high in 2014
Investors bet big time on demand for rental properties over homeownership in 2014, when sales of apartment buildings hit a record $110.1 billion, or nearly 15% higher than the previous year.
| Jan 22, 2015
Architecture Billings Index rebounds at end of 2014
The American Institute of Architects reported the December ABI score was 52.2, up from a mark of 50.9 in November. This score reflects an increase in design activity.
| Jan 21, 2015
From technician to rainmaker: Making the leap in your career
Many AEC firms focus on training for the hard skills of the profession, not so much for business prowess, writes BD+C's David Barista.
Modular Building | Jan 21, 2015
Chinese company 3D prints six-story multifamily building
The building components were prefabricated piece by piece using a printer that is 7 meters tall, 10 meters wide, and 40 meters long.
| Jan 21, 2015
Tesla Motors starts construction on $5 billion battery plant in Nevada
Tesla Motors’ “gigafactory,” a $5 billion project on 980 acres in Sparks, Nev., could annually produce enough power for 500,000 electric cars.
| Jan 20, 2015
Daring hotel design scheme takes the shape of cut amethyst stone
The Dutch practice NL Architects designed a proposal for a chain of hotels shaped like a rock cut in half to reveal a gemstone inside.
