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Title: Windows and lighting program

More than 30% of all energy use in buildings is attributable to two sources: windows and lighting. Together they account for annual consumer energy expenditures of more than $50 billion. Each affects not only energy use by other major building systems, but also comfort and productivity -- factors that influence building economics far more than does direct energy consumption alone. Windows play a unique role in the building envelope, physically separating the conditioned space from the world outside without sacrificing vital visual contact. Throughout the indoor environment, lighting systems facilitate a variety of tasks associated with a wide range of visual requirements while defining the luminous qualities of the indoor environment. Windows and lighting are thus essential components of any comprehensive building science program. Despite important achievements in reducing building energy consumption over the past decade, significant additional savings are still possible. These will come from two complementary strategies: (1) improve building designs so that they effectively apply existing technologies and extend the market penetration of these technologies; and (2) develop advanced technologies that increase the savings potential of each application. Both the Windows and Daylighting Group and the Lighting System Research Group have made substantial contributions in each ofmore » these areas, and continue to do so through the ongoing research summarized here. 23 refs., 16 figs.« less
Publication Date:
OSTI Identifier:
6453615
Report Number(s):
LBL-28742
ON: DE91004662
DOE Contract Number:
AC03-76SF00098
Resource Type:
Technical Report
Research Org:
Lawrence Berkeley Lab., CA (USA)
Sponsoring Org:
DOE/CE
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; DAYLIGHTING; ENERGY EFFICIENCY; LIGHTING SYSTEMS; WINDOWS; BUILDINGS; DESIGN; ENERGY CONSERVATION; ENERGY CONSUMPTION; GLAZING; OPTICAL PROPERTIES; PROGRESS REPORT; COVERINGS; DOCUMENT TYPES; EFFICIENCY; ENERGY SYSTEMS; OPENINGS; PHYSICAL PROPERTIES 320106* -- Energy Conservation, Consumption, & Utilization-- Building Equipment-- (1987-); 320107 -- Energy Conservation, Consumption, & Utilization-- Building Systems-- (1987-)