Light, daylighting and fluctuation of illuminance level in office buildings

Husini, Elina Mohd; Yazit, Raja Nur Syaheeza Raja Mohd; Arabi, Fadli; Ismail, Wan Rosmanira; Ja’afar, Nor Haslina

doi:10.1088/1757-899x/401/1/012021

Cited by 5 publications

(4 citation statements)

References 7 publications

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“…DIALux, a freely accessible and user-friendly computer software, is widely employed for simulating and visualizing lighting in various environments [20,21]. This tool facilitates the creation of virtual spaces, encompassing both daylight and artificial light conditions, and offers versatile simulations for buildings, rooms, and outdoor areas [22][23][24]. Users can analyze lighting system performance in specific locations and object environments, presenting results through numerical data, graphs, and images [25,26].…”

Section: Simulationmentioning

confidence: 99%

Leading Light: The Impact of Advanced Lighting Technologies on Indonesia's Office Industry

Murdiyansyah,

Yandri,

Lodewijk

et al. 2024

Leuser J. Environ. Stud.

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Addressing concerns over resource scarcity and environmental sustainability necessitates a global shift towards sustainable energy, notably facilitated by adopting Light-Emitting Diode (LED) lamps. This transition is pivotal for ensuring global energy security and aligning with sustainability goals. This study endeavors to comprehensively analyze potential energy savings achievable through the transition from Fluorescent (FL) lamps to LED lamps within industrial offices. Emphasis is placed on highlighting the central role of energy efficiency. Utilizing false color rendering as a visual guide, the study systematically identifies areas where FL lamps inadequately illuminate. The findings prompt recalculations for determining optimal room illumination achievable through implementing LED lamps. Lux calculations are then employed to showcase the superior illumination offered by LED lamps, revealing consistent monthly cost savings of 35%, particularly when harmonized with Building Management System (BMS) control in industrial office buildings. The study's results indicate that LED lamps provide superior illumination, yielding a noteworthy 35% monthly cost savings, especially when integrated with BMS control. Lamps contribute modestly (21-30%) to overall energy consumption, while air conditioning commands a substantial 60%, underscoring the critical need for advanced lighting technology. This need is emphasized, particularly with Solar PV as a sustainable energy source. Understanding technological developments, especially in BMS, is crucial to optimize energy efficiency in industrial offices. The imperative implementation of LED lighting technology is a critical solution to address resource scarcity and environmental concerns in industrial offices. The efficacy of LED lamps in achieving significant energy savings, especially when coupled with advanced systems like BMS and complemented by renewable energy sources such as Solar PV. The conclusion stresses the significance of staying abreast of technological advancements to foster sustained progress towards energy-efficient and environmentally conscious practices within industrial environments.

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Section: Simulationmentioning

confidence: 99%

Leading Light: The Impact of Advanced Lighting Technologies on Indonesia's Office Industry

Murdiyansyah,

Yandri,

Lodewijk

et al. 2024

Leuser J. Environ. Stud.

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“…An office space with single glazed, window-wall façade bounded by walls on the sides is adopted for the procedure to depict the typical spatial configuration of multi-story open-plan office buildings in Malaysia [19,32,33]. The room measures 9 m by 6 m, with floor-to-ceiling height of 3m, with no consideration for furniture layout or occupancy density.…”

Section: Test Modelmentioning

confidence: 99%

Comparative Study on Computer Simulation of Solar Shading Performance with Heliodon and Artificial Sky

Dalumo

Lim

2021

Journal of Daylighting

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Current technological advancement and the requirement for sustainability-driven practices has birthed increased demands for accuracy in performance and assessment of energy consumption in the built environment. Energy-efficient and sustainable building projects are to large extents dependent on achieving functional solar shading and sufficient daylighting in building interiors. Hence, the understanding and adequate evaluation of the sun and its dynamic influence on buildings right at the early stage of planning and design is essential for the development of performance-driven building designs. In this study, the performance simulation results of Integrated Environmental Solutions <Virtual Environment> software program modules are examined for accuracy in executing performance analysis of solar shading. This study assesses the shading prediction of Suncast; a virtual solar shading calculation tool, and RadianceIES for measuring daylight availability in a tropical climate region. The evaluation of shading performance with Suncast was validated through physical experiment by comparing the results obtained therein with shading analysis outcomes generated on a scale model with the aid of a heliodon. Likewise, RadianceIES daylighting simulations were compared with measurements realised from an artificial sky simulator. The results were further subjected to correlation tests to determine the relationship between simulation and physical experiment results. The computational evaluation approach presented more efficient means of conducting the performance simulations over the physical experiment methods which were limited by mechanical design of the components. Suncast and RadianceIES simulation results presented comparable equivalence with measurement output acquired from the heliodon and artificial sky respectively, with minimal variations in accuracy. Thus, demonstrating the ability of the computational simulation program in accurately predicting solar shading and daylight performance in buildings, this could benefit architects in the proper and efficient design of shading devices for building facades at early design stages.

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“…The current recommended illuminance level is not achieved the desired illuminance levels during occupancy in the post evaluation. Furthermore, the unstable fluctuation of illuminance level may affect the inconsistency of visual comfort (Husini, Yazit, Arabi, Ismail, & Jaafar, 2018). It is found that the preferred illuminance level in office building is still ponder and further improvement on the implementation on passive design strategy still required.…”

Section: Problem Statementmentioning

confidence: 99%

“…The deep issues and further investigation on fluctuation of illuminance in daylight is required and these changes of illumination variarion resulted the different perception to mood and performance in the building (Husini et al, 2018). Fluctuation is defined as changes that can occur when there is increasing light and decreasing light.…”

Section: Issues On Fluctuation Of Illuminance Levelmentioning

confidence: 99%

The Effects Of Daylight Fluctuation And Illuminance Level In Office Building

Yazit¹,

Arabi²,

Kandar³

et al. 2019

The European Proceedings of Multidisciplinary Sciences

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Daylighting is concerned with the lead causes of energy consumption where greenest building assessments is based on the daylight quality. Most of the measurements of daylight performance and quality are based on illuminances in office spaces. Daylight and illuminance should not be neglected in adapting the appropriate brightness as this is an important criterion in rating building performance. Impact of illuminance level in office buildings is not critically examined to support the visual performance of occupants. The objectives of this study are to investigate the level of illuminance and fluctuations of daylight on occupancy for the office spaces and to identify whether the minimum level of illuminance affect occupants' visual comfort in optimum performance zone. The research methodology applied in this work is divided into three parts that are survey on the occupant's perception, the visual test and simulation. The results demonstrate the density of occupancy of 50% and below in a space of 300 lux achieved the daylight performance with R squared of 0.8385. While the ideal WWR for single office space should be within below 40% in achieving the optimum performance zone with 2700 mm distance from window. The new approach on daylighting performance and quality analysis that is based on occupant density is to define the direction of designing a space with acceptable illuminance level and improving the daylight metric for performance zone.

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Light, daylighting and fluctuation of illuminance level in office buildings

Cited by 5 publications

References 7 publications

Leading Light: The Impact of Advanced Lighting Technologies on Indonesia's Office Industry

Leading Light: The Impact of Advanced Lighting Technologies on Indonesia's Office Industry

Comparative Study on Computer Simulation of Solar Shading Performance with Heliodon and Artificial Sky

The Effects Of Daylight Fluctuation And Illuminance Level In Office Building

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