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Abstrak :
Berlimpahnya cahaya matahari juga dapat membantu penghematan energi untuk pencahayaan pada bangunan kantor. Namun, cahaya matahari yang berlebih menimbulkan silau dan panas terutama pada area di dekat jendela. Fasad kaca pada bangunan kantor mempengaruhi intensitas pencahayaan alami yang masuk ke dalam ruangan sehingga digunakan shading untuk mengatur pencahayaan. Namun, shading yang digunakan saat ini bersifat statis dalam bentuk horizontal, vertikal, maupun egg crate sehingga distribusi cahaya tidak merata. Dengan demikian, penggunaan dynamic shading perlu dieksplorasi karena kemampuannya dalam mengontrol cahaya dan mengurangi konsumsi energi pencahayaan. Penelitian ini bertujuan untuk mengembangkan jenis shading melalui konfigurasi dynamic shading untuk meningkatkan kualitas pencahayaan alami sehingga menurunkan konsumsi energi untuk pencahayaan. Penelitian terdiri atas lima tahap yang diawali dengan observasi lapangan pada tujuh bangunan kantor yang dipilih. Kemudian dilanjutkan dengan pra simulasi dan perhitungan OTTV untuk memilih satu bangunan kantor yang paling tepat untuk dipasang dynamic shading. Tahap berikutnya adalah simulasi eksisting dan modifikasi shading horizontal, vertikal, dan egg crate yang masing – masing memiliki konfigurasi fasad berbeda karena jenis rotasi yang berbeda pada fasad. Tahap selanjutnya yaitu pengukuran pencahayaan alami di bangunan terpilih dan tahap terakhir yaitu eksperimen. Lebar kisi – kisi dynamic shading, jarak dynamic shading ke kaca serta ukuran perforated aluminium adalah parameter penelitian. Hasil yang paling optimal untuk mencapai uniformity minimal 0,5 adalah dynamic shading egg crate dengan model 2 untuk pagi hari, model 1 untuk siang hari, dan model 3 untuk digunakan pada sore hari. ......The quantity of sunlight can also assist save electricity for office lighting. Excessive sunshine, on the other hand, generates glare and heat, particularly in places near windows. Because glass facades in office buildings modify the intensity of natural light entering the space, shading is used to control illumination. However, the shading currently used is static in the form of horizontal, vertical, or egg crates so that the light distribution is uneven. Thus, the use of dynamic shading needs to be explored because of its ability to control light and reduce lighting energy consumption. This study aims to develop types of shading through dynamic shading configurations to improve the quality of natural lighting thereby reducing energy consumption for lighting. The research consisted of five stages beginning with field observations in the seven selected office buildings. Then proceed with the pre-simulation and OTTV calculations to choose the most appropriate office building to install dynamic shading. The following stage involves the existing simulation and modification of the horizontal, vertical, and egg crate shading, each of which has a different facade configuration due to a different sort of facade rotation. The following stage is to measure natural illumination in selected buildings, followed by experiment of the best dynamic shading configuration. The research parameters are the width of the dynamic shading grating, the distance between the dynamic shading and the glass, and the size of the perforated aluminum. The dynamic shading of egg crate with model 2 for the morning, model 1 for the afternoon, and model 3 for use in the afternoon produces the best results for achieving uniformity of at least 0.5.

Abstrak :
ABSTRAK
The current Indonesian standard for daylighting in buildings, SNI 03-2396-2001, recommends the use of sky component from a sky as the metric for indicating indoor daylight availability. To calculate sky component as a function of the relative position (L/D and H/D) of an unglazed, vertical daylight aperture, a reference table are provided; however, the accuracy of the tabulated values are unknown. This article reports the accuracy of the provided values compared to the analytical ones. It is found that 11 from 361 provided values have relative errors of 10% or larger. Comparisons between results of some worked examples obtained from interpolating the table values and from solving the analytical expression are also reported. based on analisis that recommended to use the reference table only if the L/D and H/D ratios are within the tabulated range of 0.1 ~ 6.0. otherwise, the use of analytical expression to determine the sky component is strongly suggested.

Abstrak :
Daylight science and daylighting technology, by Richard Kittler, Miroslav Kocifaj, and Stanislav Darula, sketches the entire evolution of daylight science from atmospheric science through apt visual workplace psychophysics.