Daylighting Tropical Building Interiors from Skylight: The Case for Separating Heat from Useful Visible Light

Al-Obaidi, Karam M.; Ismail, Mohd Rodzi; Rahman, Abdul Malek Abdul

doi:10.1007/978-981-287-077-3_50

Cited by 5 publications

(8 citation statements)

References 3 publications

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“…At higher latitudes > than 25 ∘ , high radiations can be observed as proof of high potential solar energy availability for various solar energy applications. For example, a 5-year cumulative annual global solar radiation was found to be 1693 Kwh/m 2 /day in Spain (latitude 42 ∘ N, 4.9 ∘ W) and 1841 Kwh/m 2 /day in Malta (latitude 36 ∘ N, 14.5 ∘ E) where June and July are the months that receive the greater sunshine [26], giving the proof that solar radiation decreases with the latitude and determines the regional houses architecture [14]. Radiation data recorded at 12 sites around the central part of the Baltic Sea (latitude varies from 54 ∘ N, 15 ∘ E to 61 ∘ N, 24 ∘ E) from 1996 to 2000 showed June to be the month of highest solar radiation in most part of the region with an average daily total of 20.9 MJ/m 2 at Visby (57.69 ∘ N, 18.35 ∘ E) [20].…”

Section: Resultsmentioning

confidence: 99%

“…Hourly monitoring of ambient temperature, solar global or direct radiation is an important mean for engineers and building designers to select construction materials that correspond to the specific climate. Such reports are rather scarce, while yearly, monthly, and daily mean values are the most reported in the literature [14,21,26]. In a study conducted in Ajaccio France, ambient temperature, solar irradiance, wind speed and direction, and so forth were recorded every minute.…”

Section: Resultsmentioning

confidence: 99%

“…Hourly mean temperatures of modern roofs are reported [14]. However, the solar irradiance on which depends the temperature behavior was not reported.…”

Section: Resultsmentioning

confidence: 99%

“…However, few studies deal with the specific thermal contribution of the roof to the house. The possibility of roof light for indoor comfort was explored in order to design an innovative roofing system for the tropics with plenty of sunshine and high humidity [14].…”

Section: Introductionmentioning

confidence: 99%

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Modeling Solar Energy Transfer through Roof Material in Africa Sub-Saharan Regions

Adounkpè

Lawin

Ahouannou

et al. 2013

ISRN Renewable Energy

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As a result of the global warming, the atmospheric temperature in sub-Saharan regions of Africa may drastically increase, thus worsening the poor living conditions already experienced by people in those regions. Roof’s thermal insulation capacity may play key role in reducing indoor thermal comfort cost. In the present study, effort is put to model heat transfer through roofs in south Saharan regions. Validation of the model was achieved using the slightly sloppy galvanized aluminum-iron sheet roof. Atmospheric data were hourly measured during April and June in Ouagadougou, Burkina Faso. Solar energy values increase from 24.50±0.50 W/m2 in the morning to a maximum of 900.1±0.8 W/m2 in the early afternoon. Ambient temperature follows the same trend as solar radiation with a maximum at 40.0±0.2°C. Wind speed varies from 0.5 to 4.0±0.1 m/s. The measured roof inner wall temperatures agreed excellently with the developed model with a Nash-Sutcliffe Coefficient of Efficiency of 0.988. Energy flux entering the room through the roof varies from 63.1±0.3 W/m2 earlier in the morning to a maximum of 115.3±0.5 W/m2 in the earlier afternoon. These results shall help to better design human habitat under changing climate conditions in the sub-Saharan regions.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…Hourly mean temperatures of modern roofs are reported [14]. However, the solar irradiance on which depends the temperature behavior was not reported.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modeling Solar Energy Transfer through Roof Material in Africa Sub-Saharan Regions

Adounkpè

Lawin

Ahouannou

et al. 2013

ISRN Renewable Energy

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“…However, daylighting in tropical countries is a totally different issue that requires some critical considerations on the positioning of openings in the building fabric to permit light entrance and for avoiding extreme heat gains and extreme brightness caused by the direct sunlight [7,8,9]. Using daylight as one of the passive solar design strategies for tropical buildings usually depends on the architectural design of the building where the correct location is crucial.…”

Section: Daylightingmentioning

confidence: 99%

A review study on the application of the fibre optic daylighting system in Malaysian buildings

Munaaim

Al-Obaidi

Ismail

et al. 2014

International Journal of Sustainable Building Technology and Ur

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As a developing country, Malaysia requires innovation to keep abreast of the rapid growth of technology to meet the highly demanding energy consumption. The application of daylighting systems especially by fibre optics is very limited, due to the absence of relevant knowledge and the lack of understanding of the system requirements and potentials, particularly the technology of illuminating enclosed spaces which are totally surrounded by internal walls (opaque). Thus, the aim of this literature review is to shed light on this new approach and to help the building technologists activate its application in building interiors. This paper presents and summarises the important technical issues that enhance the adoption of this technique for the Malaysian built environment.

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Effective use of hybrid turbine ventilator to improve thermal performance in Malaysian tropical houses

Al-Obaidi

Ismail

Rahman

2016

Building Services Engineering Research and Technology

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An efficient design approach that involves extracting heat build-up in tropical buildings is a means to reduce total dependency on air-conditioning systems. The hybrid turbine ventilator can be regarded as a development technique to address this issue. However, identifying its efficient application in buildings remains questionable. This study aims to develop the research on the hybrid turbine ventilator for the establishment of energy-efficient designs in houses by evaluating its effective use in specific space volume based on several empirical comparisons. The performance of passive and hybrid turbine ventilators in attic space, room, and (attic space + room) with opened and closed windows was compared. The study was conducted in an actual building model, and data were collected onsite with a data acquisition system. The objective was achieved by investigation, and the findings can be used to identify the levels of heat build-up in each strategy. Examination of thermal performance confirmed the appropriate use of the hybrid turbine ventilator in Malaysian landed houses. Practical application:This research contributes directly to energy efficient design in tropical buildings. The outcomes inform a better decision on the effective use of hybrid turbine ventilator in low-rise buildings. The study provides ample evidence on the great potential of using hybrid turbine ventilator by developing its investigation in tropical architecture. The study will assist engineers and architects to evaluate hybrid turbine ventilator performance effectively.

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Daylighting Tropical Building Interiors from Skylight: The Case for Separating Heat from Useful Visible Light

Cited by 5 publications

References 3 publications

Modeling Solar Energy Transfer through Roof Material in Africa Sub-Saharan Regions

Modeling Solar Energy Transfer through Roof Material in Africa Sub-Saharan Regions

A review study on the application of the fibre optic daylighting system in Malaysian buildings

Effective use of hybrid turbine ventilator to improve thermal performance in Malaysian tropical houses

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