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
| Apr 8, 2011
SHW Group appoints Marjorie K. Simmons as CEO
Chairman of the Board Marjorie K. Simmons assumes CEO position, making SHW Group the only firm in the AIA Large Firm Roundtable to appoint a woman to this leadership position
| Apr 5, 2011
Zaha Hadid’s civic center design divides California city
Architect Zaha Hadid is in high demand these days, designing projects in Hong Kong, Milan, and Seoul, not to mention the London Aquatics Center, the swimming arena for the 2012 Olympics. But one of the firm’s smaller clients, the city of Elk Grove, Calif., recently conjured far different kinds of aquatic life when members of the City Council and the public chose words like “squid,” “octopus,” and “starfish” to describe the latest renderings for a proposed civic center.
| Apr 5, 2011
Are architects falling behind on BIM?
A study by the National Building Specification arm of RIBA Enterprises showed that 43% of architects and others in the industry had still not heard of BIM, let alone started using it. It also found that of the 13% of respondents who were using BIM only a third thought they would be using it for most of their projects in a year’s time.
| Apr 5, 2011
Top 10 Buildings: Women in Architecture
Making selections of top buildings this week led to a surprising discovery about the representation of women in architecture, writes Tom Mallory, COO and co-founder, OpenBuildings.com. He discovered that finding female-created architecture, when excluding husband/wife teams, is extremely difficult and often the only work he came across was akin to interior design.
| Apr 5, 2011
What do Chengdu, Lagos, and Chicago have in common?
They’re all “world middleweight cities” that are likely to become regional megacities (10 million people) by 2025—along with Dongguan, Guangzhou, Hangzhou, Shenzhen, Tianjin, and Wuhan (China); Kinshasa (Democratic Republic of the Congo); Jakarta (Indonesia); Lahore (Pakistan); and Chennai (India), according to a new report from McKinsey Global Institute: “Urban World: Mapping the economic power of cities”.
