An east-facing anidolic daylighting system on a tropical urban house

Abstract

Effectiveness of indoor environment quality in LEED-certified healthcare settings

Assessing the energy saving potential of anidolic system in the tropics

“…The aperture area corresponds to approximately 9.5% of the floor area (window to floor area ratio or WFR) with 2.1 m of sill height. This value is close to the minimum value recommended by LEED (2009), 10%, whereas a previous study (Binarti and Satwiko 2016) discovered that the application of AS in the tropics demands less than 10% of the WFR. Each collector consists of parabolic stainless steel (light reflectance: 90%) and a single clear glass (light transmittance: 90%).…”

“…The width of a collector was defined by the aperture height and three variations of angular spread. These variations are chosen based on the previous studies (Kleindienst 2006;Wittkopf et al 2010;ASHRAE 2013;Binarti and Satwiko 2016) as discussed in the Introduction. The aperture area corresponds to approximately 9.5% of the floor area (window to floor area ratio or WFR) with 2.1 m of sill height.…”

“…There are two variations in orientation for all aperture models in each location, which are selected based on previous studies. Apertures in the southern hemisphere are oriented to the North and East as the best orientation (Binarti and Satwiko 2016), while apertures in the northern hemisphere are oriented to the South and East as the best orientation (Linhart et al 2010;Roshan et al 2013).…”

“…The parabolic form is aimed to capture zenithal light at a wide range of time. Although its effective light capture duration is more limited (Binarti and Satwiko 2016) than the ability of adaptive shading facade system in redirecting natural light into the interior (Michael et al 2017), anidolic system still can be classified as an advanced passive daylighting system.…”

“…However, the price of this coating material is still high for developing countries. Stainless steel (reflectance: 90%) has been proven as an appropriate collector material in previous studies in Thonburi, Thailand (latitude 13°57' N and longitude 100°44′ E) (Praditwattanakit et al 2013) and Yogyakarta, Indonesia (latitude 7°49' S and longitude 110°21′ E) (Binarti and Satwiko 2016). Furthermore, seven variants of the virtual AIC collectors with 50-cm-high apertures were tested to develop a method for predicting the luminous intensity distribution curves (LIDC) (Wittkopf et al 2010).…”