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Title: Performance of Integrated Systems of Automated Roller Shade Systems and Daylight Responsive Dimming Systems

Abstract

Daylight responsive dimming systems have been used in few buildings to date because they require improvements to improve reliability. The key underlying factor contributing to poor performance is the variability of the ratio of the photosensor signal to daylight workplane illuminance in accordance with sun position, sky condition, and fenestration condition. Therefore, this paper describes the integrated systems between automated roller shade systems and daylight responsive dimming systems with an improved closed-loop proportional control algorithm, and the relative performance of the integrated systems and single systems. The concept of the improved closed-loop proportional control algorithm for the integrated systems is to predict the varying correlation of photosensor signal to daylight workplane illuminance according to roller shade height and sky conditions for improvement of the system accuracy. In this study, the performance of the integrated systems with two improved closed-loop proportional control algorithms was compared with that of the current (modified) closed-loop proportional control algorithm. In the results, the average maintenance percentage and the average discrepancies of the target illuminance, as well as the average time under 90percent of target illuminance for the integrated systems significantly improved in comparison with the current closed-loop proportional control algorithm for daylight responsive dimming systemsmore » as a single system.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Environmental Energy Technologies Division
OSTI Identifier:
1012241
Report Number(s):
LBNL-4418E
Journal ID: ISSN 0360-1323; BUENDB; TRN: US201109%%807
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Building and Environment
Additional Journal Information:
Journal Volume: 46; Journal Issue: 2011; Related Information: Journal Publication Date: 747-757; Journal ID: ISSN 0360-1323
Country of Publication:
United States
Language:
English
Subject:
30; 32; ACCURACY; ALGORITHMS; ILLUMINANCE; MAINTENANCE; PERFORMANCE; RELIABILITY; SKY; SUN; TARGETS; Integrated systems, automated roller shade systems, daylight responsive dimming systems, daylighting, photoelectric controls

Citation Formats

Park, Byoung-Chul, Choi, An-Seop, Jeong, Jae-Weon, and Lee, Eleanor S. Performance of Integrated Systems of Automated Roller Shade Systems and Daylight Responsive Dimming Systems. United States: N. p., 2010. Web.
Park, Byoung-Chul, Choi, An-Seop, Jeong, Jae-Weon, & Lee, Eleanor S. Performance of Integrated Systems of Automated Roller Shade Systems and Daylight Responsive Dimming Systems. United States.
Park, Byoung-Chul, Choi, An-Seop, Jeong, Jae-Weon, and Lee, Eleanor S. Thu . "Performance of Integrated Systems of Automated Roller Shade Systems and Daylight Responsive Dimming Systems". United States. https://www.osti.gov/servlets/purl/1012241.
@article{osti_1012241,
title = {Performance of Integrated Systems of Automated Roller Shade Systems and Daylight Responsive Dimming Systems},
author = {Park, Byoung-Chul and Choi, An-Seop and Jeong, Jae-Weon and Lee, Eleanor S},
abstractNote = {Daylight responsive dimming systems have been used in few buildings to date because they require improvements to improve reliability. The key underlying factor contributing to poor performance is the variability of the ratio of the photosensor signal to daylight workplane illuminance in accordance with sun position, sky condition, and fenestration condition. Therefore, this paper describes the integrated systems between automated roller shade systems and daylight responsive dimming systems with an improved closed-loop proportional control algorithm, and the relative performance of the integrated systems and single systems. The concept of the improved closed-loop proportional control algorithm for the integrated systems is to predict the varying correlation of photosensor signal to daylight workplane illuminance according to roller shade height and sky conditions for improvement of the system accuracy. In this study, the performance of the integrated systems with two improved closed-loop proportional control algorithms was compared with that of the current (modified) closed-loop proportional control algorithm. In the results, the average maintenance percentage and the average discrepancies of the target illuminance, as well as the average time under 90percent of target illuminance for the integrated systems significantly improved in comparison with the current closed-loop proportional control algorithm for daylight responsive dimming systems as a single system.},
doi = {},
journal = {Building and Environment},
issn = {0360-1323},
number = 2011,
volume = 46,
place = {United States},
year = {2010},
month = {7}
}