Assessing the energy saving potential of anidolic system in the tropics

Binarti, Floriberta; Satwiko, Prasasto

doi:10.1007/s12053-017-9603-7

Cited by 6 publications

(13 citation statements)

References 23 publications

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“…Rightly installed on a window top part, most daylighting systems have demonstrated a great potential "to capture sunlight under clear and/or intermediate sky conditions and redirect the direct component of daylight toward the room ceiling fraction closer to the window" [13] and be a promising daylighting solution [18]. In an analysis of the impacts of light shelves in office spaces in Toronto, Canada, Berardi and Anaraki (2015) concluded that a constant increase in Window-to-Wall Ratio (WWR) reduces Useful Daylight Illuminance (UDI) of the near window area and increases UDI for the back part of the room [20].…”

Section: Literature Reviewmentioning

confidence: 99%

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Curve Optimization for the Anidolic Daylight System Counterbalancing Energy Saving, Indoor Visual and Thermal Comfort for Sydney Dwellings

Sorooshnia¹,

Rahnamayiezekavat

Rashidi³

et al. 2023

Energies

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Daylight penetration significantly affects building thermal-daylighting performance, and serve a dual function of permitting sunlight and creating a pleasant indoor environment. More recent attention has focused on the provision of daylight in the rear part of indoor spaces in designing sustainable buildings. Passive Anidolic Daylighting Systems (ADS) are effective tools for daylight collection and redistribution of sunlight towards the back of the room. As affordable and low-maintenance systems, they can provide indoor daylight and alleviate the problem of daylight over-provision near the window and under-provision in the rear part of the room. Much of the current literature on the ADS pays particular attention to visual comfort and rarely to thermal comfort. Therefore, a reasonable compromise between visual and thermal comfort as well as energy consumption becomes the main issue for energy-optimized aperture design in the tropics and subtropics, in cities such as Sydney, Australia. The objective of the current study was to devise a system that could act as a double-performance of shade and reflective tool. The central aim of this paper is to find the optimum curve that can optimize daylight admission without an expensive active tracking system. A combination of in-detail simulation (considering every possible sky condition throughout a year) and multi-objective optimization (considering indoor visual and thermal comfort as well as the view to the outside), which was validated by field measurement, resulted in the optimum ADS for the local dwellings in Sydney, Australia. An approximate 62% increase in Daylight Factor, 5% decrease in yearly average heating load, 17% savings in annual artificial lighting energy, and 30% decrease in Predicted Percentage Dissatisfied (PPD) were achieved through optimizing the ADS curve.

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Section: Literature Reviewmentioning

confidence: 99%

“…Much of the current literature on the ADS pays particular attention to visual comfort but rarely thermal comfort. Therefore, a reasonable compromise between visual and thermal comfort, as well as energy consumption, becomes the main issue for energyoptimized aperture design in the tropics and subtropics [18].…”

Section: Introductionmentioning

confidence: 99%

Curve Optimization for the Anidolic Daylight System Counterbalancing Energy Saving, Indoor Visual and Thermal Comfort for Sydney Dwellings

Sorooshnia¹,

Rahnamayiezekavat

Rashidi³

et al. 2023

Energies

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“…This system consists of three main elements: (i) an anidolic exterior component, (ii) a false ceiling, and (iii) a twenty-one-light duct. For the AIC geometry, we referred to: reference [39] for the AIC configuration, and reference [16] for modelling a specific system for our case study based on simulations of a series of different width of the exterior aperture [13]. Moreover, another parametric study has been developed for the light duct configuration in relation to width and location on the false ceiling.…”

Section: Test Model Characteristicsmentioning

confidence: 99%

“…This peculiar condition poses additional challenges to achieve a comfortable office environment; indeed, it is a crucial element to carefully consider when defining office design strategies. It has been proved in many studies that using daylighting guide systems, especially in deep-plane spaces, contribute to: (i) naturally illuminate deep buildings, (ii) control the daylight space penetration, (iii) avoid glare and create a comfortable visual environment, and (iv) contribute effectively to the energy-saving by reducing the need for artificial lighting [13][14][15][16]. Those systems can redirect both direct and diffuse natural light to the core of the building, up to 8 m, by means of reflection, refraction, or deflection.…”

Section: Introductionmentioning

confidence: 99%

A Combined Method for an Exhaustive Investigation of the Anidolic Ceiling Effect on Improving Indoor Office Daylight Quality: an Approach Based on HDR Photography and Subjective Evaluations

Daich

Saadi

Piga

et al. 2021

Journal of Daylighting

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Lighting quality in office environments is a broad concept that must be taken into account in the design stage to deliver comfortable spaces to reduce workers' stress. Indeed, daylight should be sufficient to perform visual tasks while avoiding excessive brightness, high contrast, or intense sunlight reflections that can cause discomfort glare. This research aims to test the Anidolic Integrated Ceiling (AIC) performance in creating a visually comfortable space by reducing the probability of glare. A combined method was adopted for investigating the influence of the building orientation and the workers' view directions in the different moments of the day in the winter season. Data collection was performed in an experimental environment, i.e., a physical scale model of 1:4 under real sky conditions. Three variables were: (i) the viewer's positions (parallel and face to the window), (ii) the façade orientation, (iii) the time of the day (morning and afternoon). To investigate the correlation between the simulated environment and the subjective comfort, we collected the following data in parallel: illuminance level, Daylight Glare Probability Index (DGIP), Luminance Contrast Ratios (LCR) for assessing the daylighting environments, and people reactions to the lighting setting to evaluate the perceived discomfort glare. The findings indicate that the Anidolic system's performance differs according to the occupant's orientation and her\his visual direction. The performance of the north façade of the case study application in Biskra, Algeria, was the best one. Indeed, the AIC system allows a harmonious luminance distribution without creating discomfort glare. Glare assessment shows that glare is perceived imperceptible in the lateral view (less than 0.30) and varies between imperceptible and perceptible in the parallel view (LCR values between 1:1 and 1:29). The questionnaire results show that the subjects were more satisfied with the luminous atmosphere of the lateral view than the parallel view where people more likely perceived discomfort. The statistical analysis shows that participants' perceptions of contrast and sensitivity to glare have a strong relationship with DGIP and LCR (0.000) and no correlation with illuminance and LCR.

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“…The manifest of those variables has the prospect of affecting building performance and can imply the mid-rise building located in the tropical climate country. It has dominantly a high intensity of solar radiation throughout the year, so even the clear sky with the diffused light has a diffuseness degree of is around 20% [7,8].…”

Section: Introductionmentioning

confidence: 99%

Lighting system evaluations of working space in educational building, Universitas Indonesia

Heindri

Dewi

Ismoyo

2022

IOP Conf. Ser.: Earth Environ. Sci.

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This paper aims to evaluate the natural and artificial lighting systems for working space at the educational building in Universitas Indonesia. The doctoral working spaces and innovation laboratories are used as the case studies. The evaluation variables include orientation, openings, and lighting placement. The presence of variables can minimize the use of artificial lighting during the operating hours with clear sky conditions according to the SNI. The tools involved in this study are Lux meter and DIALux evo version 9.2 to perform the direct measurement and simulation. This study found that the lighting planning has fulfilled the SNI standards for doctoral working space with a minimum of 350 Lux and innovation laboratories which require 500 Lux. The direct measurement results of lighting range utilizing the natural light show output with an average of 182.8-1,278.1 Lux and the combination with artificial light from 222-1,883.8 Lux. Meanwhile, for the DIALux evo simulation, each room has exceeded the lower limit of lighting criteria between 403-3,739 Lux.

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Assessing the energy saving potential of anidolic system in the tropics

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Cited by 6 publications

References 23 publications

Curve Optimization for the Anidolic Daylight System Counterbalancing Energy Saving, Indoor Visual and Thermal Comfort for Sydney Dwellings

Curve Optimization for the Anidolic Daylight System Counterbalancing Energy Saving, Indoor Visual and Thermal Comfort for Sydney Dwellings

A Combined Method for an Exhaustive Investigation of the Anidolic Ceiling Effect on Improving Indoor Office Daylight Quality: an Approach Based on HDR Photography and Subjective Evaluations

Lighting system evaluations of working space in educational building, Universitas Indonesia

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