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195633

INVESTIGATING OF THE LIGHT SHELF SYSTEM PERFORMANCE IN THE MAIN FOUR GEOGRAPHICAL DIRECTIONS IN HOT ARID ZONE (A case study of a hypothetical office building in New Cairo area)

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Last updated: 28 Dec 2024

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Abstract

Hot arid climates are characterized by clear sunny sky most of the year. Such climates are known for their futility to use light shelves, especially in terms of energy consumption and visual performance. This requires more studies to be conducted in order to explore the factual possibility of benefiting from the effective use of light shelf and quality in hot arid climate. Therefore, this paper performs investigation into using different light shelf positions for the four main geographical directions. This system will be evaluated from the point of view of its impact and influence on special daylight autonomy (sDA) 300/50% [% of Space Area]), Annual sunlight Exposer (ASE 250 h/1000 [% of Space Area]), daylight availability (partially daylight, daylight and over lit), and Total Annual Energy consumption (tAEC [KW/m2]). The study performed a parametric analysis using DIVA for Rhino (grasshopper) simulation tool on a hypothetical office building in New Cairo area. The study outcome proved that light shelf can be an effective daylighting system to improve lighting environments without any negative effect on energy consumption, especially by using that kind of combined light shelf (internal and external). The results show that the performance rate in descending order was in the south, then west and east while it is not futile of use horizontal light shelf in the north direction. Therefore, on this basis this search recommends developing a parametric design for light shelf systems.

Keywords

light shelf, clear sky desert environment, hot arid climates, special daylight autonomy, Annual sunlight Exposure and energy consumption

Authors

First Name

Ahmed

Last Name

Fakry

MiddleName

A.

Affiliation

Professor of Architecture, Cairo University,

Email

dr.ahmedfekry@gmail.com

City

Cairo

Orcid

-

Volume

57

Article Issue

2

Related Issue

26608

Issue Date

2018-12-01

Receive Date

2018-11-10

Publish Date

2018-12-01

Page Start

13

Page End

8

Print ISSN

1110-1253

Online ISSN

2735-5500

Article File

article_195633_f1559b454a0fee26097e2b4dc96cb4ab.pdf

PDF . 21B

Link

https://egsen.journals.ekb.eg/article_195633.html

Detail API

https://egsen.journals.ekb.eg/service?article_code=195633

Order

11

Type

Scientific and technological

Type Code

1,881

Publication Type

Journal

Publication Title

Journal of the Egyptian Society of Engineers

Publication Link

https://egsen.journals.ekb.eg/

MainTitle

INVESTIGATING OF THE LIGHT SHELF SYSTEM PERFORMANCE IN THE MAIN FOUR GEOGRAPHICAL DIRECTIONS IN HOT ARID ZONE (A case study of a hypothetical office building in New Cairo area)

Details

Type

Article

Created At

23 Jan 2023