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An investigation into the risk of night light pollution in a glazed office building: The effect of shading solutions

Du, J, Zhang, X and King, D (2018) An investigation into the risk of night light pollution in a glazed office building: The effect of shading solutions. Building and Environment, 145. pp. 243-259. ISSN 0360-1323

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Abstract

Light pollution has been recognised as a major environmental problem in urban areas at night. This study presents an investigation into the impact of seven various shading solutions on the risk of light pollution caused by indoor artificial lighting in a fully glazed office building. Radiance, a ray-tracing package, was adopted to calculate external illuminances produced by indoor lighting applications at various positions. It has been determined that: 1) A glazed façade could become a critical source of light pollution or obtrusive light (sky glow and light trespass) due to applications of indoor lighting at night; 2) A light shelf could perform well on the protection of both light trespass and sky glow; 3) A large overhang and horizontal louvre could effectively lower the risk of light trespass, but would possibly cause the deterioration of sky glow; and 4) No significant impact of short overhang and vertical louvre can be found on the two aspects of light pollution. This study exposes a significant implication; apart from their principal functions, the shading devices applied in a largely glazed building may require a new role in controlling obtrusive light in cities at night.

Item Type: Article
Uncontrolled Keywords: 1201 Architecture, 1202 Building, 0502 Environmental Science And Management
Subjects: N Fine Arts > NA Architecture
T Technology > TD Environmental technology. Sanitary engineering
T Technology > TH Building construction
Divisions: Built Environment
Publisher: Elsevier
Date Deposited: 26 Sep 2018 10:38
Last Modified: 26 Sep 2018 10:43
DOI or Identification number: 10.1016/j.buildenv.2018.09.029
URI: http://researchonline.ljmu.ac.uk/id/eprint/9334

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