Consulting-Specifying Engineer - December 2008 - (Page 21)

M/E Roundtable the electrical specification in achieving it successfully. CSE: How are energy codes and standards impacting lighting controls? Haran: Watts-per-square-foot is the density of the rate of using energy. Our present codes actually limit connected load and do not take into account load shedding by bi-level controls, dimming, or occupancy sensing, nor for hours of use. The building industry is slowly moving toward Zero Net Energy or Carbon Neutrality, which is the goal of Architecture 2030 program. Toward this end, energy codes and standards, such as ASHRAE 90.1, are giving credits or mandating the use of lighting controls in the upcoming versions. There is a drive toward a new metric, watt-hoursper-square-foot, rather than watts-persquare-foot. DiLouie: Energy codes have aggressively promoted adoption of automatic shutoff lighting controls, such as intelligent load-scheduling control panels and occupancy sensors. They are now beginning to promote other types of controls, such as daylighting controls. Manriquez: Codes and standards shape the base layer of compliance. I think the true benefit is in assessing the potential of lighting controls as a critical component in maximizing energy performance and daylight integration. Wise: The hassle over lighting power density in the revised Federal Energy Code is what prompted the lighting quality research project I managed back at Pacific Northwest National Laboratory in the early 1990s. There were serious questions then if lighting quality could be maintained at the low wattsper-square-foot levels being pushed by environmental organizations. Well, the answer was yes, but it requires some really unique lighting design. A study, sponsored by New York State Energy Research and Development Authority, showed how a demo heterogeneous lighting system with foolproof control interfaces could reduce classroom lighting power densities to an average 0.73 W/sq ft, which is 50% less than ASHRAE 90.1 2007/2010. I wish I had that type of lighting design in recent teaching experience, but looking at it makes me realize how poorly designed educational institution lighting systems truly are. Input #213 at csemag.com/quickResponse Consulting-Specifying Engineer • DECEMBER 2008 21 http://www.uecorp.com http://www.uecorp.com http://www.csemag.com/quickResponse

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Consulting-Specifying Engineer - December 2008 Contents Viewpoint News M/E Roundtable ARC Awards New Construction Gold New Construction Silver New Construction Bronze Renovation Gold Renovation Silver A Green Approach to Air Conditioning Systems Turning Down the Lights Case Study New Products Equipment Lifecycles Advertiser Index Green Space Gas Technology Pure Power Supplement

Consulting-Specifying Engineer - December 2008

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