Natural ventilation of light well in high-rise apartment building

Kotani, Hisashi; Satoh, Ryuji; Yamanaka, Tatsuhiko

doi:10.1016/s0378-7788(02)00166-4

Cited by 32 publications

(24 citation statements)

References 6 publications

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“…According to Kotani et al [7], the longer and narrower a light well is, the less efficient it becomes, while the larger and wider it is, the larger illuminance it provides. The best performance of the light well throughout the day is achieved when the sun is high in the sky and more light is being penetrated to the bottom of the light well [8].…”

Section: Reviewmentioning

confidence: 99%

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Daylight distribution patterns in light wells in residential buildings in Penang, Malaysia

Fadzil¹,

Al-Absi²

2016

WIT Transactions on Ecology and the Environment

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This paper focuses on the daylight distribution pattern in the light well in high rise residential buildings in Penang, Malaysia. Light well is a vertical void through all of the floors of a building which is designed to distribute daylight to adjacent spaces. The size of the light well is determined by the UBBL or the Malaysian Uniform Building By Laws (1984) clause no 40. The suitability of the clause is questioned when the original 8 storey residential buildings in the 1980s have risen up to 40 storeys after the year 2000. Eight case study buildings of varied heights and well sizes were carried out and natural illumination data were taken at well centres at each floor to be compared to the illumination outside. The percentage daylight factor (%DF) data were then calculated. The distinct pattern of daylight distribution from each case study was determined. The pattern of daylight factor values derived were found to be similar -very high illumination values at the top 3 floors; ample light for the next 4 to 5 floors while below those categories the light distribution were found to be quite low requiring artificial lighting almost 24 hours. However, this depends also on the A/H (area/height) index ratios and on the design of well -whether all enclosed, with supplementary side openings or others. Computer simulations using Ecotect were carried out to compare the simulated daylighting pattern of the well to field work. The daylighting pattern was found to be similar with advantages to the simulated graphical outputs. Suggestions as to how light well designs can be improved especially in buildings under the bright Malaysian skies were concluded.

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Section: Reviewmentioning

confidence: 99%

“…The best performance of the light well throughout the day is achieved when the sun is high in the sky and more light is being penetrated to the bottom of the light well [8]. Moreover, any means that lead and derived the daylight or sunlight inside the light well help to increase the occupants' satisfaction [7].…”

Section: Reviewmentioning

confidence: 99%

Daylight distribution patterns in light wells in residential buildings in Penang, Malaysia

Fadzil¹,

Al-Absi²

2016

WIT Transactions on Ecology and the Environment

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“…'Void' means air well or atria, which is normally in the center of a building and it is a passive architectural feature which is adopted for natural lighting and ventilation [19,22,23]. According to Shuzo Murakami et al [24], voids in the buildings bring advantages to the architectural, environmental and structural aspects, which can be summarized as follows: (1) indoor environmental control with a low environmental load using the potential of the outdoor environment will be possible.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Void on Natural Ventilation Performance in Multi-Storey Housing

et al. 2016

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Abstract:Enhancing natural ventilation performance in multi-storey housing is very important for the living environment in terms of health and thermal comfort purposes. One of the most important design strategies to enhance natural ventilation in multi-storey housing is through the provision of voids. A void is a passive architectural feature, which is located in the middle of deep plan buildings. It is very crucial to consider the configurations of voids in the buildings for enhancing natural ventilation, especially for multi-storey housing. In this study, Malaysian Medium Cost Multi-Storey Housing (MMCMSH), which is an example of multi-storey housing located in a suburban area, has been selected in this study. This study aims to investigate the potential of void for enhancing natural ventilation performance in multi-storey housing by the comparison of two different void configurations. Field measurement of MMCMSH has been conducted to validate Computational Fluid Dynamic (CFD) model and Atmospheric Boundary Layer (ABL) is an important parameter for setting up the CFD Model's domain. Ventilation rate (Q), which is necessary for comfort and health reasons, is an important parameter for the comparison of the different void configurations. This study revealed that the provision of void can enhance natural ventilation performance in multi-storey housing with an increase in the value of Q, from 3.44% to 40.07%, by enlarging the void's width by 50% compared to the existing void.

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“…However, there are other important factors in determining the airflow performance in the lightwell such as heat transfer from wall surfaces of the lightwell and adjoining spaces through windows (openings with lower L/d h value) and connections to the outdoor through horizontal voids (openings with larger L/d h value). In fact, the idea of connecting lightwells to the outdoor through horizontal voids is not new, and has been the focus of many previous studies [13][14][15][16][17]. Horizontal voids are usually found in the first floor in high-rise buildings and serve multi-purpose uses such as car parks [18].…”

Section: Introductionmentioning

confidence: 99%

“…Kotani et al [16,30,31] conducted many experimental high-rise buildings models in a wind tunnel, and empirical models were used to investigate the airflow characteristics inside an internal lightwell connected to the outdoor through a horizontal void. The above studies investigated the effect of the heat magnitude and its source position, air velocity and void size on the airflow rate, air temperature and airflow pattern in lightwells.…”

Section: Introductionmentioning

confidence: 99%