The Alternatives for Optimum Operations of Daylight Dimming Controls of a Small Office in Shanghai Region

Renyan Gu; Sooyoung Kim

doi:10.21086/ksles.2025.8.32.4.476

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2025 Vol.32, Issue 4 Preview Page Next Page

Research Article

The Alternatives for Optimum Operations of Daylight Dimming Controls of a Small Office in Shanghai Region 상하이 지역의 소규모 사무소 공간에 대한 조광제어 시스템의 최적 운용 대안

31 August 2025. pp. 476-485

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Abstract

This study analyzes the system performance of daylight dimming controls for a small office in Shanghai to suggest appropriate control options. A series of simulations for diverse daylight conditions were conducted using ReLux and consecutive computations were employed. For north-facing conditions, partially-shielded photosensors used with horizontal blinds in June, 45° blinds in March as well as June, and no blinds in December functioned successfully. Lighting energy savings by them ranged from 35.5 to 47.9%. The horizontal and 45° blinds in December failed to achieve a target illuminance. Unshielded-photosensors used with horizontal blinds in June and no blinds in March and June provided successful controls with lighting energy savings from 78.3 to 90%. For south-facing conditions, partially-shielded photosensors combined with horizontal and no blinds in December achieved successful controls with lighting energy savings of 74.0 and 75.3%, respectively. Except them, all daylight conditions overshot a target illuminance. Unshielded-photosensors with horizontal and no blinds functioned successfully with lighting energy savings from 84.4 to 90%. These photosensors used with 45° blinds undershot a target illuminance. Prediction models between desktop and photosensor illuminance levels were acceptable with a significance level of 0.05 and strong linear correlations existed between them.

Keywords

Daylight dimming

Control option

Photosensor

Lighting energy

Prediction models

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Information

Publisher :The Korean Society of Living Environmental System
Publisher(Ko) :한국생활환경학회
Journal Title :Journal of The Korean Society of Living Environmental System
Journal Title(Ko) :한국생활환경학회
Volume : 32
No :4
Pages :476-485
Received Date : 2025-06-23
Revised Date : 2025-07-23
Accepted Date : 2025-07-28
DOI :https://doi.org/10.21086/ksles.2025.8.32.4.476

Journal of The Korean Society of Living Environmental System ISSN:1226-1289(Print) 한국생활환경학회

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