November 18, 2013 | Vol. 22
Daylight Harvesting Technologies Embrace the Power of the Sun
by Brent Protzman, Lead Architectural Engineer at Lutron Electronics
The evolution of architectural lighting
Daylighting is a relatively new term for an ancient practice. In the millennia before the introduction of electricity, buildings had to rely on available daylight to illuminate interior spaces.
More recently, as electric lighting sources and technologies improved, daylight became almost passé. Evolving building codes, new energy regulations, and a renewed emphasis on sustainability lighting professionals to once again embrace daylight as a practical, aesthetic, and symbolic element of good building design.
The dynamic nature of daylight
The greatest challenge of using daylight as a primary light source is that it is dynamic, and somewhat unpredictable–there are seasonal and cyclical patterns, but daylight also changes from day-to-day, hour-to-hour, and even from one building façade to the next.
Automated shading solutions, digital dimming technologies, and daylight sensors can work together to compensate for these constant changes in daylight, minimizing the need for electric light by incorporating dynamic fenestration (automated shades, solar-adaptive software, and window sensors) into total light management systems.
One of the most powerful motivators to use daylight more effectively is code compliance. As of October 18, 2013, all state commercial building codes must meet or exceed ASHRAE 90.1-2010 standards that include mandatory requirements for daylight harvesting technology. Other building standards, including IECC and Title 24, are following suit by including similar daylighting requirements in their updated recommendations.
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NEMA Announces 2014 Board of Governors
The National Electrical Manufacturers Association elected Christopher B. Curtis, President and CEO, North America, Schneider Electric, Chairman of the 2014 Board of Governors at its annual meeting in Palm Beach earlier this month.
NEMA President and CEO Urges Military to Implement Energy-Efficient Technologies
National Electrical Manufacturers Association President and CEO Evan R. Gaddis served as the moderator of the Defense Energy panel during the Defense Energy Summit November 11-13 in Austin, Texas. Attendees included experts from companies that manufacture lighting, microgrid components, and energy storage systems, and have experience in military installations and government contracting.
NEMA Endorses Industry Data Exchange Association (IDEA) as Sole Preferred Source for Member Company Product Data
During 2013, IDEA dramatically increased the volume of marketing data in its Industry Data Warehouse (IDW). The IDW now includes more than 325,000 products each with manufacturers’ specification sheets, attributes, images, and product descriptions.
NEMA Publishes NEMA SG 11-2013 Guide for Handling and Maintenance of Alternating Current Outdoor High-Voltage Circuit Breakers
This document provides information on receiving, storage, handling, installation, inspection, and maintenance of alternating current outdoor high-voltage circuit breakers. NEMA SG 11-2013 may be downloaded at no cost on the NEMA website or purchased in hardcopy for $66.
NEMA Publishes Multiple Standards in NEMA TC Series: TC 3-2013, TC 6 & 8-2013, TC 18-2013
The National Electrical Manufacturers Association (NEMA) published NEMA TC 3-2013 Polyvinyl Chloride (PVC) Fittings for Use with Rigid PVC Conduit and Tubing, NEMA TC 6 & 8-2013 Polyvinyl Chloride (PVC) Plastic Utilities Duct for Underground Installations, and NEMA TC 18-2013 Packaging of Master Bundles for EPC-40 Polyvinyl Chloride (PVC) Conduit. Contents and scope of each standard may be viewed on the NEMA website.
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Drive-by Charging: Advancing Wireless Power Transfer for Vehicles
Researchers from North Carolina State University have developed new technology and techniques for transmitting power wirelessly from a stationary source to a mobile receiver—moving engineers closer to their goal of creating highway "stations" that can recharge electric vehicles wirelessly as the vehicles drive by.
OSHA Schedules Meeting of the Federal Advisory Council on Occupational Safety and Health
The Occupational Safety and Health Administration has scheduled a meeting of the Federal Advisory Council on Occupational Safety and Health December 5, 2013, in Washington, D.C.
Smart Water Meter from Kamstrup Approved for South Africa
The smart water meter from Kamstrup has passed the test of the South African Bureau of Standards—opening the way for its provision to South African water suppliers.
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