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Using solar screens in school classrooms in hot arid areas: the effect of different perforation on daylighting levels

Kotbi, Ahmad and Ampatzi, Eleni 2016. Using solar screens in school classrooms in hot arid areas: the effect of different perforation on daylighting levels. Presented at: PLEA2016: 32nd International conference on Passive and Low Energy Architecture, Los Angeles, CA, 11-13 July 2016. Published in: La Roche, Pablo and Schiler, Marc eds. PLEA2016 - 32nd International conference on Passive and Low Energy Architecture - Cities, Buildings, People: Towards Regenerative Environments. Los Angeles, CA: PLEA, pp. 691-698.

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Abstract

Hot arid areas are endowed with an abundance of clear skies. Thus, the solar energy available can significantly raise the temperature of interior spaces and also result in an uncomfortable visual environment due to glare and poor uniformity ratios. This paper focuses on a special case of girls’ schools in Saudi Arabia, where the privacy issue is critical due to socio-cultural and religious beliefs. Most windows in girls’ schools are covered by dark opaque film to maintain privacy. This window treatment brings the need for electric lights, which makes schools huge consumers of energy considering the peak time operational hours and the large number of schools. This paper looks at how different perforation rates affect the performance of screens by simulating 10 different ratios from 10% to 90% and a base case without a screen. First, the effect was tested on average illuminance levels, and then on Daylight Availability by using the Daylight Dynamic Performance Metrics approach (DDPM). The results specify the minimum perforation rate to provide the required average illuminance in each orientation and give a tool to decide perforation rates according to the required percentage of daylit area in contexts similar to the studied space.

Item Type: Conference or Workshop Item (Paper)
Date Type: Published Online
Status: Published
Schools: Architecture
Subjects: N Fine Arts > NA Architecture
Uncontrolled Keywords: Daylight, Solar Screens, Schools, Privacy, Daylight Availability, Daylight Dynamic Performance Metrics.
Publisher: PLEA
ISBN: 9781365293542
Funders: KSU - King Saud University, SACB - Saudi Arabian Cultural Bureau in London
Related URLs:
Date of First Compliant Deposit: 16 June 2017
Last Modified: 16 Jun 2017 10:27
URI: http://orca.cf.ac.uk/id/eprint/96462

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