Investigation of Various Window Orientation in Daylighting Performance in Hot-Humid Climate of Subang, Malaysia

Abstract

This paper discusses the effect of window orientation on the quality of daylight in order to obtain optimum visual comfort in a lecture room in Subang-Kuala Lumpur Malaysia. Visual comfort in buildings is a vital factor to be taken into consideration and has become a priority. Research work is required in order to recognize the limitations, prospects, and challenges of orientation based on working times for daylighting strategy. The lecture room is associated with outdoor and indoor parameters including geographical location, outdoor illuminance, type of sky, orientation, room size, window to floor area, the position of window, reflectance from floor, wall and ceiling and glazing transparent. It is estimated that the window to floor area ratio in a typical lecture room is 20 percent. The investigation was carried out via Radiance in IES(Virtual Environment) for estimating the evaluated daylighting. The hourly and monthly daylight hours have simulated four cardinal orientations windows because students spend most of the daytime in the lecture room. The average amount of the outdoor illuminance in various months and selected hours of 10am, 12pm and 3pm are simulated under overcast sky and intermediate sky condition according to the Subang-Kuala Lumpur Malaysia condition. The research found that the amount of daylight reaching strongly depends on the orientation, month and time of the working hours in a lecture room. The findings in the lecture room indicate that under an intermediate sky without sun, the north-facing window can provide the best daylight throughout the year during working hours. Consequently, the paper offers to designers and building engineers as a guideline to use guidelines for determining the best orientation instead of a simulation program based on orientation, month and time.

Diagnostics of Existing Lighting Conditions in Existing Public Schools in Central-Southern Chile: Measurements and Predictions for Retrofit

“…The evidence that exposure to daylight and views are essential to human life is widely documented for decades (Heschong, 2021;Ludlow, 1976), especially how it impacts human systems such as the visual (Boyce, Hunter, & Howlett, 2003) production of Vitamin D and circadian regulation (Crowley, Cain, Burns, Acebo, & Carskadon, 2015;Mirrahimi, Ibrahim, & Surat, 2013). Currently, daylighting is recognized as one of the most influential factors in creating a positive learning environment, creating optimal conditions for the development of tasks, facilitating learning, and improving performance (Aumann, Heschong, Wright, & Peet, 2004;Rahman & Tuhin, 2019;Susan & Prihatmanti, 2017;Tanner, 2009).…”

Evolution of interior space design criteria on the quality of urban environment: Literature review

“…Visual conditions depend on parameters such as "brightness distribution, illumination and homogeneity, glare, color of light, color rendering, flicker rate and amount of daylight" (EN 12464-1, 2002). Daylight, which is a source of illumination, is very important on people's health (Edwards & Torcellini, 2002;Hansen, 2006;Košir et al, 2011;Mirrahimi et al, 2013;Acosta & Figueiro, 2015), sustainability of living resources (Dobrin, 1998;Kim & Kim, 2010;Konis, 2013;Korsavi et al, 2016;Al Zaabi et al, 2017), energy saving (Li & Lam, 2001;Bodart & De Herde, 2002;Galasiu & Veitch, 2006;da Fonseca et al, 2013), productivity and success of people (Leather et al, 1998;Fontoynont, Page| 263 2002;Park & Athienitis, 2003;Ruck, 2006;Manav, 2007;Krüger & Dorigo, 2008;Winterbottom & Wilkins, 2009;Erlalelitepe et al, 2011;Samani, 2012;Şansal, 2013;Ahadi et al, 2016;Shishegar & Boubekri, 2016). Therefore, daylight is a necessary and useful strategy for providing visual comfort (Fakhari et al, 2021).…”

Structural Relationships between Environmental Factors, Psychological Health, and Academic Performance in Medical Students Engaged in Online Learning during the COVID-19 Pandemic

“…Several recent studies have suggested that environmental factors may also contribute to the onset or aggravation of psychological health [17]. Lighting is one of the most important factors for a positive learning environment [18], and it has an important role in improving the psychological health of students [19]. There is evidence for the significance of lighting for psychological wellbeing, as well as personal health and wellbeing [20].…”

“…There is evidence for the significance of lighting for psychological wellbeing, as well as personal health and wellbeing [20]. For example, Mirrahimi et al (2013) demonstrated the effects of lighting on the health, psychology, and cognitive abilities of students [19]. In addition, noise has been found to have negative effects on psychological health [21] by causing emotional distress and discomfort [22].…”