Daylight Performance of Louvred Shading on Atrium Skylight in Exhibition Gallery: Prestasi Pencahayaan Siang bagi Teduhan Berjalur pada Atrium Bumbung Kaca di dalam Galeri Pameran

Desmand Hii Jing Chao; Christopher Heng Yii; Nooriati Taib; Gabriel Ling Hoh Teck; Lim Jing Jing

doi:10.37934/progee.31.2.5166

Authors

Desmand Hii Jing Chao School of Housing, Building and Planning, Universiti Sains Malaysia, 11800 Penang, Malaysia
Christopher Heng Yii School of Housing, Building and Planning, Universiti Sains Malaysia, 11800 Penang, Malaysia https://orcid.org/0000-0002-6582-5703
Nooriati Taib School of Housing, Building and Planning, Universiti Sains Malaysia, 11800 Penang, Malaysia
Gabriel Ling Hoh Teck Department of Urban and Regional Planning, Faculty of Built Environment and Surveying, Universiti Teknologi Malaysia, Malaysia
Lim Jing Jing Faculty of Built Environment and Surveying, Universiti Teknologi Malaysia, Malaysia

DOI:

https://doi.org/10.37934/progee.31.2.5166

Keywords:

Daylighting, Atrium Skylight, Tropical Climate, Shading Device, Exhibition Gallery, Pencahayaan Siang, Bumbung Kaca Atrium, Iklim Tropika, Alat Teduhan, Galeri Pameran

Abstract

Daylighting is often underutilized in regions characterized by tropical climates. In Malaysia, architectural designs frequently incorporate enclosed walls and facades to minimize solar heat gain. However, this approach limits the penetration of natural daylight into deeper interior spaces. As a result, larger and deeper spaces, such as exhibition galleries, often rely on artificial lighting to achieve adequate illumination, thereby increasing the building’s overall energy demand. To mitigate the reliance on artificial lighting, this study aims to identify and evaluate the effectiveness of vertical and horizontal louvred shading systems applied to an exhibition gallery's atrium skylight within a tropical climate context. Both vertical and horizontal louvred shading configurations were analysed using the VELUX Daylight Visualizer simulation software. The Phase 1 simulation results indicate that the vertical louvred Type D (D = 600 mm, L = 300 mm) and horizontal louvred Type 3 (D = 150 mm, L = 450 mm) configurations demonstrated superior daylight performance when applied independently to the atrium skylight. In contrast, the Phase 2 simulation revealed that combining both louvred shading systems significantly enhances daylight performance. The integrated Type D2 configuration—comprising vertical louvred Type D (D = 600 mm, L = 300 mm) and horizontal louvred Type 2 (D = 150 mm, L = 300 mm)—achieved the most optimal daylight distribution for the atrium skylight in the exhibition gallery compared to other design configurations.

Pencahayaan semula jadi sering kurang dimanfaatkan di kawasan yang beriklim tropika. Di Malaysia, reka bentuk seni bina sering menggabungkan dinding dan mukaan tertutup untuk meminimumkan kenaikan haba solar. Walau bagaimanapun, pendekatan ini mengehadkan penembusan cahaya semula jadi ke ruang dalaman yang lebih dalam. Akibatnya, ruang yang lebih besar dan dalam seperti galeri pameran sering bergantung pada pencahayaan tiruan untuk mencapai tahap pencahayaan yang mencukupi, sekali gus meningkatkan permintaan tenaga keseluruhan bangunan. Bagi mengurangkan kebergantungan terhadap pencahayaan tiruan, kajian ini bertujuan untuk mengenal pasti dan menilai keberkesanan sistem teduhan berjalur menegak dan mendatar yang digunakan pada atrium bumbung kaca galeri pameran dalam konteks iklim tropika. Kedua-dua konfigurasi teduhan berjalur menegak dan mendatar telah dianalisis menggunakan perisian simulasi VELUX Daylight Visualizer. Keputusan simulasi Fasa 1 menunjukkan bahawa konfigurasi teduhan berjalur menegak Jenis D (D = 600 mm, L = 300 mm) dan teduhan berjalur mendatar Jenis 3 (D = 150 mm, L = 450 mm) memberikan prestasi pencahayaan semula jadi yang lebih baik apabila digunakan secara berasingan pada atrium bumbung kaca. Sebaliknya, simulasi Fasa 2 menunjukkan bahawa gabungan kedua-dua sistem teduhan berjalur dapat meningkatkan prestasi pencahayaan semula jadi dengan ketara. Konfigurasi gabungan Jenis D2—terdiri daripada jalur menegak Jenis D (D = 600 mm, L = 300 mm) dan jalur mendatar Jenis 2 (D = 150 mm, L = 300 mm)—mencapai taburan pencahayaan semula jadi yang paling optimum untuk atrium bumbung kaca di galeri pameran berbanding dengan konfigurasi reka bentuk yang lain.

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