Daylight availability and models for global and diffuse horizontal illuminance and irradiance for Bangkok

Chirarattananon, Surapong; Chaiwiwatworakul, Pipat; Pattanasethanon, Singthong

doi:10.1016/s0960-1481(01)00099-4

Cited by 62 publications

(25 citation statements)

References 3 publications

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“…From this figure, it can be seen how the differences between curves corresponding to different months of the year are significant. This feature coincides with findings by Chirarattananon et al [30]. Following these authors, the differences between the availability of illuminance for different months of a year are small for Bangkok but they are important for United Kingdom and other locations far from the equator.…”

Section: Estimation Of Diffuse Illuminance On Horizontal Surfacesupporting

confidence: 91%

Diffuse illuminance availability on horizontal and vertical surfaces at Madrid, Spain

Oteiza

Pérez-Burgos

2012

Energy Conversion and Management

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Section: Estimation Of Diffuse Illuminance On Horizontal Surfacesupporting

confidence: 91%

Diffuse illuminance availability on horizontal and vertical surfaces at Madrid, Spain

Oteiza

Pérez-Burgos

2012

Energy Conversion and Management

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“…It indicates that electricity saved implies non-renewable fossil fuel conserved together with the likely pollutants and greenhouse gases reductions [5]. Electric lighting is one of the major energy consuming items accounting for 20-30% of the total electricity use in fully air-conditioned office buildings [6,7] and 10% for residential sector [8]. Natural light is an 0306-2619/$ -see front matter Ó 2010 Elsevier Ltd. All rights reserved.…”

Section: Introductionmentioning

confidence: 99%

A review of daylight illuminance determinations and energy implications

2010

Applied Energy

151

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“…At the global level, 25 to 40% of this energy used, is for artificial lighting (10,11). When the level of energy consumption is narrowed down to Asian countries, the trend of energy consumption is not different (2).…”

Section: Introductionmentioning

confidence: 99%

Light Shelf as a Daylighting System in a Tropical Climate Office Space

Abimaje¹,

Joshua²,

Kandar³

et al. 2018

IJET

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Daylighting is a passive design strategy for lighting office spaces given the fact that offices operate within daytime, usually between 8:00 am to 5:00 pm which corresponds to the period of daylight availability. Daylight is abundant in the tropics, free and has no negative impact on the environment. It has positive physiological and psychological effect on the man as well as good colour rendering. Ironically, despite the abundant availability and the merits of daylighting especially in the tropics, it is not fully utilized. A light shelf is one of the innovative daylighting systems that can be employed to improve office spaces daylighting performance. Therefore, the focus of this study is the application of light shelf as a daylighting system in government offices in Malaysia. This study was carried out through literature search on thirteen disciplines. The disciplines were building and environment, energy, and building, renewable and sustainable energy, energy conservation in Building, lighting research and technology, energy conservation and Management, Solar energy, renewable energy, indoor and built environment, energy policy, energy and buildings, renewable energy, and applied energy. Data were obtained from Science Direct, Web of Science, Scopus and Conference Proceedings. This was done by typing in keywords such as daylighting, light shelf, office spaces, visual performance, tropical climate, and Malaysia. The review was from 1986 to 2016 to cover the length and breadth of the study area for the past 30 years. This work includes previous review and empirical works. Attention was equally given to the methodologies and context of the work. The result of this study showed the poor daylighting performance of government office spaces in Malaysia. The daylighting in these offices is either too low as a result of the use of excessive external shading devices to reduce interior heat gain or too high due to over glazed wall for aesthetics and daylighting. Consequent upon these is inadequate daylighting illuminance, non-uniform illuminance distribution, and glare. This brings about visual discomfort. Also, the study revealed that light shelf as an innovative daylighting lighting system could improve the daylighting performance of these office spaces. The effectiveness of light shelf depends on the latitude, reflectance of light shelf material, the angle of inclination, its depth, mounting position among others. However, there exists little work on the effect of the depth of light shelf and the variation of its distance from the ceiling on the daylight performance of government office spaces in Malaysia. This paper, therefore, recommends investigation on the effect of the depth of light shelf and the variation of its distance from the ceiling on daylighting performance of government office spaces in Malaysia.

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Daylight availability and models for global and diffuse horizontal illuminance and irradiance for Bangkok

Cited by 62 publications

References 3 publications

Diffuse illuminance availability on horizontal and vertical surfaces at Madrid, Spain

Diffuse illuminance availability on horizontal and vertical surfaces at Madrid, Spain

A review of daylight illuminance determinations and energy implications

Light Shelf as a Daylighting System in a Tropical Climate Office Space

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