02358nas a2200157 4500008004100000050001500041245011400056210006900170260003400239520175500273100002102028700002902049700002102078700002702099856007402126 1998 eng d aLBNL-4144300aIntegrated Performance of an Automated Venetian Blind/Electric Lighting System in a Full-Scale Private Office0 aIntegrated Performance of an Automated Venetian BlindElectric Li aClearwater Beach, FLc09/19983 a

Comprehensive results are presented from a full-scale testbed of a prototype automated venetian blind/lighting system installed in two unoccupied, private offices in Oakland, California. The dynamic system balanced daylight against solar heat gains in real-time, to reduce perimeter zone energy use and to increase comfort. This limited proof-of-concept test was designed to work out practical "bugs" and refine design details to increase cost effectiveness and acceptability of this innovative technology for real-world applications. We present results from 14 months of tuning the system design and monitoring energy performance and control system operations. For this southeast-facing office, we found that 1-22% lighting energy savings, 13-28% cooling load reductions, and 13-28% peak cooling load reductions can be achieved by the dynamic system under clear sky and overcast conditions year round, compared to a static, partly closed blind with the same optimized daylighting control system. These energy savings increase if compared to conventional daylighting controls with manually-operated blinds. Monitored data indicated that the control system met design objectives under all weather conditions to within 10% for at least 90% of the year. A pilot human factors study indicated that some of our default control settings should be adjusted to increase user satisfaction. With these adjustments, energy savings will decrease. The final prototype design yielded a 10-year simple payback for this site. If mechanical system downsizing opportunities and qualitative improvements to worker's comfort are included, this innovative technology could be more cost effective. Marketing information for commercializing this technology is given.

1 aLee, Eleanor, S.1 aDiBartolomeo, Dennis, L.1 aVine, Edward, L.1 aSelkowitz, Stephen, E. uhttps://facades.lbl.gov/publications/integrated-performance-automated01544nas a2200241 4500008004100000245010200041210006900143260001200212300001200224490000700236520078600243653001301029653001201042653002501054653001601079653001301095100002101108700002101129700002201150700002901172700002701201856007401228 1998 eng d00aOffice Worker Response to an Automated Venetian Blind and Electric Lighting System: A Pilot Study0 aOffice Worker Response to an Automated Venetian Blind and Electr c10/1998 a205-2180 v283 a

A prototype integrated, dynamic building envelope and lighting system designed to optimize daylight admission and solar heat gain rejection on a real-time basis in a commercial office building is evaluated. Office worker response to the system and occupant-based modifications to the control system are investigated to determine if the design and operation of the prototype system can be improved. Key findings from the study are: (1) the prototype integrated envelope and lighting system is ready for field testing, (2) most office workers (N=14) were satisfied with the system, and (3) there were few complaints. Additional studies are needed to explain how illuminance distribution, lighting quality, and room design can affect workplane illuminance preferences.

10abehavior10aComfort10acommercial buildings10adaylighting10aenvelope1 aVine, Edward, L.1 aLee, Eleanor, S.1 aClear, Robert, D.1 aDiBartolomeo, Dennis, L.1 aSelkowitz, Stephen, E. uhttps://facades.lbl.gov/publications/office-worker-response-automated