Pengaruh Variasi Geometri Louvers Trapesium pada Perilaku Simultan Distribusi Pencahayaan dan Penghawaan Alami Rumah Susun Tropis

Jahja, Anggun Puspita (2026) Pengaruh Variasi Geometri Louvers Trapesium pada Perilaku Simultan Distribusi Pencahayaan dan Penghawaan Alami Rumah Susun Tropis. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Bangunan rumah susun di kawasan beriklim tropis secara konstan berinteraksi dengan karakteristik lingkungan eksternal. Masalah utama yang sering terjadi adalah tingginya paparan cahaya matahari langsung, yang diperparah oleh terbatasnya sirkulasi dan distribusi aliran udara di dalam ruang. Untuk mengontrol perilaku tersebut, penggunaan alat peneduh menjadi hal krusial dalam mengatur respons spasial terhadap iklim luar. Salah satu elemen fasad pasif yang relevan adalah louvers, karena dapat berfungsi sebagai peneduh, pengarah cahaya, sekaligus pengontrol aliran udara. Namun, kajian mengenai pengaruh geometri louvers terhadap pencahayaan alami dan penghawaan alami masih banyak dilakukan secara terpisah dan terbatas pada konteks rumah susun, sehingga perilaku simultan keduanya belum sepenuhnya terjelaskan. Penelitian ini bertujuan menganalisis pengaruh variasi geometri louvers trapesium dan sudut kemiringannya terhadap perilaku simultan pencahayaan alami dan penghawaan alami pada rumah susun tropis. Metode yang digunakan adalah eksperimen fisik skala nyata pada ruang uji. Data dianalisis secara komparatif melalui perubahan nilai, kemudian disintesis untuk membaca pengaruh geometri louver terhadap perilaku simultan antara pencahayaan dan penghawaan alami. Hasil penelitian menunjukkan bahwa louvers trapesium menurunkan iluminansi dan DF, tetapi penurunan tersebut mampu meningkatkan proporsi UDI berguna. Pada aspek penghawaan, seluruh konfigurasi menurunkan debit aliran udara dan ACH, dengan tingkat penurunan yang berbeda. Temuan ini menegaskan bahwa perilaku pencahayaan dan penghawaan alami pada louvers trapesium terbentuk melalui interaksi antara geometri bilah, keterbukaan, serta arah distribusi cahaya dan udara. Konfigurasi dengan keterbukaan 2:10 dengan sudut 60° menjadi konfigurasi paling proporsional dengan persentase peningkatan UDI 15% dan mempertahankan ACH 21% terhadap base case. Dengan demikian, konfigurasi proporsional ditentukan dengan mengarahkan distribusi cahaya serta aliran udara, sekaligus mengurangi hambatan terhadap keduanya. Penelitian ini berkontribusi pada pengembangan strategi fasad pasif berbasis louvers trapesium untuk rumah susun tropis melalui pendekatan multiindikator.
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Vertical housing in tropical climates is continuously exposed to external environmental conditions. A common challenge is excessive direct solar exposure, which is often compounded by limited indoor air circulation and uneven airflow distribution. Shading devices are therefore essential for regulating indoor environmental responses to outdoor climatic conditions. Louvers are a relevant passive façade element because they can simultaneously provide shading, redirect daylight, and control airflow. However, previous studies have generally examined the effects of louver geometry on daylighting and natural ventilation separately, particularly in the context of vertical housing. Consequently, the simultaneous behaviour of both environmental aspects remains insufficiently understood. This study investigates the effects of variations in trapezoidal louver geometry and blade inclination on the simultaneous behaviour of daylighting and natural ventilation in tropical vertical housing. A full-scale physical experiment was conducted in a test room. The data were comparatively analysed based on changes in the measured values and subsequently synthesised to identify the effects of louver geometry on the simultaneous behaviour of daylighting and natural ventilation. The results show that trapezoidal louvers reduced illuminance and daylight factor (DF), while these reductions increased the proportion of useful daylight illuminance (UDI). In terms of natural ventilation, all configurations reduced airflow rate and air changes per hour (ACH), although the magnitude of reduction varied among configurations. These findings indicate that daylighting and natural ventilation performance is shaped by the interaction between blade geometry, opening ratio, and the spatial distribution of light and airflow. The configuration with an opening ratio of 2:10 and a blade angle of 60° produced the best balance between the two environmental aspects, increasing useful UDI by 15% while retaining 21% of the base-case ACH. Therefore, a balanced configuration is not determined by the maximum performance of a single indicator, but by its ability to direct daylight and airflow while limiting resistance to both. This study contributes to the development of passive façade strategies using trapezoidal louvers for tropical vertical housing through a multi-indicator evaluation approach.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	louvers trapesium, perilaku simultan, pencahayaan alami, penghawaan alami, rumah susun tropis.=====================================================daylighting, natural ventilation, trapezoid louvers, tropical vertical housing, simultaneous behaviour.
Subjects:	N Fine Arts > NA Architecture > NA2542.36 Sustainable architecture
Divisions:	Faculty of Architecture, Design, and Planning > Architecture > 23101-(S2) Master Thesis
Depositing User:	Anggun Puspita Jahja
Date Deposited:	03 Aug 2026 02:59
Last Modified:	03 Aug 2026 02:59
URI:	http://repository.its.ac.id/id/eprint/141992

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