Integration of Shading Device and Semi-Circle Horizontal Light Pipe Transporter for High-Rise Office Building in Tropical Climate

The blooming of a deep open plan in office buildings is accelerated due to economic profit reasons. This hinders the utilisation of daylight despite having abundance of daylight in tropical climate. Although a light pipe (LP) provides a means to illuminate the deep interior of the space, non-uniform daylight distribution still occurs due to the high illumination contrast across the room. The integration of a shading device (SD) in a room with an LP offers a solution to create a uniform daylight distribution. In this study, daylighting performances of 5 different types of an SD with different angles were analysed through a computer simulation software, namely Integrated Environment Solution Virtual Environment. The simulation was done using overcast and intermediate sky with sun conditions. The results showed that all SD cases improved the daylight uniformity across the room. A horizontal Venetian blind with an angle of +45o and −45o showed the best qualitative performance among all the cases. However, further shading and illumination are needed respectively to increase the potential daylight utilisation in an open plan office room. This study also concluded that a vertical Venetian blind did not provide a good daylight uniformity due to the vertical nature of the SD. A design recommendation guide for building designers is proposed at the end of this study to promote the integration of an SD and an LP in deep open plan high-rise office building.

Numerical Analysis of the Performance of an Innovative Daylighting System Named Modified Double Light Pipe

This paper focuses on the performance of an innovative daylighting system named Modified Double Light Pipe (MDLP). It consists of a device integrating a Double Light Pipe (DLP) with a light shelf. The DLP has been created by the authors to enter daylight into two levels underground buildings. It involves an excessive bulk and the risk of glare in the passage environment. The MDLP is an attempt to solve these problems by coupling the DLP and the light shelf technologies. The authors used a numerical approach modeling the MDLP by the software Rhinoceros and simulating its performance by Grasshopper plugins Ladybug and Honeybee. After calibrating the software by the comparison between numerical and experimental data on the DLP, they carried out a numerical analysis on the MDLP in steady-state and dynamic conditions. In steady-state regime, the MDLP performs better than the DLP, giving quite a uniform illuminance distribution on the horizontal work plane. This is confirmed by the results of the dynamic analysis, carried out evaluating the metric Spatial Daylight Autonomy (sDA). Moreover, the risk of glare is avoided by the MDLP, thanks to the presence of the light shelf that prevents the observer from seeing the device directly.

THE EFFECT OF OPENING DISTRIBUTION AREA MODIFICATION ON HORIZONTAL LIGHT PIPE DAYLIGHT PERFORMANCE

A deep-plan office building design limits daylight access on the workspace distant from the side window. Horizontal Light Pipe (HLP) is one of the light transport systems that can deliver daylight to these areas. The research aim was to explain and evaluate the effect of HLP’s opening distribution area on daylight performance at deep plan-private office space. The research method was experimental with simulation as a tool. Daylight level and distribution of the base case, HLP with an opening distribution area of 6.6 m2 were compared with the case, HLP with an opening distribution area of 3.41 m2. The results showed that both cases distributed daylight uniformly. A 50% reduction of HLP’s opening distribution area, from 6.6 m2 to 3.41 m2 improved the average Daylight Factor as big as 6.42%. HLP with a smaller opening distribution area can be applied as the main source of daylight on deep-plan office spaces

PEMILIHAN TEKNOLOGI PIPA CAHAYA SEBAGAI ALTERNATIF PENCAHAYAAN SIANG HARI PADA BANGUNAN KOMERSIL

<p class="MsoNormal"><span style="mso-spacerun: 'yes'; font-family: 'Times New Roman'; font-size: 10,0000pt;">Pencahayaan merupakan salah satu bagian yang penting dalam sebuah ruangan. Tanpa cahaya, manusia akan kurang optimal dalam merasakan suasana ruang.</span><span style="mso-spacerun: 'yes'; font-family: 'Times New Roman'; font-size: 10,0000pt;">Sejumlah inovasi telah banyak dilakukan untuk menghasilkan alternatif penggganti lampu sebagai sumber cahaya yang hemat energi dengan berbagai cara pengaturan pencahayaannya</span><span style="mso-spacerun: 'yes'; font-family: 'Times New Roman'; font-size: 10,0000pt;"> salah satunya yaitu, teknologi pipa cahaya </span><em><span style="font-family: 'Times New Roman';">(Light Pipe).</span></em><span style="mso-spacerun: 'yes'; font-family: 'Times New Roman'; font-size: 10,0000pt;"> Tulisan ini memaparkan salah satu teknologi pencahayaan yang hemat energi dengan cara mendistibusikan cahaya matahari ke dalam ruangan yang bertujuan untuk menjadi referensi bagi perancang bangunan, khususnya bangunan komersil agar dapat menghemat energi listrik hingga 40%. Metode yang akan digunakan dalam penelitian ini menggunakan pendekatan kualitatif dengan studi literatur. Pengolahan data menggunakan data primer dengan studi preseden. Tulisan ini diharapkan bahwa pipa cahaya ini memiliki potensi yang besar untuk digunakan secara luas di Indonesia.</span></p><p class="MsoNormal"><span style="mso-spacerun: 'yes'; font-family: 'Times New Roman'; font-size: 10,0000pt;">Pencahayaan merupakan salah satu bagian yang penting dalam sebuah ruangan. Tanpa cahaya, manusia akan kurang optimal dalam merasakan suasana ruang.</span><span style="mso-spacerun: 'yes'; font-family: 'Times New Roman'; font-size: 10,0000pt;">Sejumlah inovasi telah banyak dilakukan untuk menghasilkan alternatif penggganti lampu sebagai sumber cahaya yang hemat energi dengan berbagai cara pengaturan pencahayaannya</span><span style="mso-spacerun: 'yes'; font-family: 'Times New Roman'; font-size: 10,0000pt;"> salah satunya yaitu, teknologi pipa cahaya </span><em><span style="font-family: 'Times New Roman';">(Light Pipe).</span></em><span style="mso-spacerun: 'yes'; font-family: 'Times New Roman'; font-size: 10,0000pt;"> Tulisan ini memaparkan salah satu teknologi pencahayaan yang hemat energi dengan cara mendistibusikan cahaya matahari ke dalam ruangan yang bertujuan untuk menjadi referensi bagi perancang bangunan, khususnya bangunan komersil agar dapat menghemat energi listrik hingga 40%. Metode yang akan digunakan dalam penelitian ini menggunakan pendekatan kualitatif dengan studi literatur. Pengolahan data menggunakan data primer dengan studi preseden. Tulisan ini diharapkan bahwa pipa cahaya ini memiliki potensi yang besar untuk digunakan secara luas di Indonesia.</span></p>