The Experts below are selected from a list of 8157 Experts worldwide ranked by ideXlab platform
Aminatuzuhariah Megat Abdullah - One of the best experts on this subject based on the ideXlab platform.
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building facade design for daylighting quality in typical Government Office building
Building and Environment, 2012Co-Authors: Mohd Zin Kandar, Mohd Hamdan Ahmad, Dilshan Remaz Ossen, Aminatuzuhariah Megat AbdullahAbstract:Daylighting is one of the potential passive strategies to improve energy performance and users' visual comfort in existing Offices without expensive installation and operational cost. For the first time, empirical study of daylighting performance was conducted for an existing typical Government Office building designed by Public Work Department (PWD) in Malaysia. Daylight field measurement of external illuminance and internal work plane illuminance was carried out. The findings demonstrated that internal daylight level in the building was insufficient despite the abundance of external daylight availability in the tropics which can achieve as high as 130 klx. Validation of simulation using Radiance-based software against the measurement under actual tropical sky indicated significant Pearson correlation of 0.709. Then, modification of window glazing and shading devices was experimented with simulation. The findings evidenced that light shelf increased daylight distribution uniformity, but failed to reduce glare on vertical plane when direct sunlight patches occurred. Integration of light shelf with partial blinds tilted at 45° showed improved performances of mean Guth Visual Comfort Probability (VCP) and CIE Glare Index. This paper concludes that simple modification of window glazing and shading device is able to provide significant improvement in tropical daylighting quantity and quality for visual comfort.
Yong Wu - One of the best experts on this subject based on the ideXlab platform.
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implementing effect of energy efficiency supervision system for Government Office buildings and large scale public buildings in china
Energy Policy, 2009Co-Authors: Jing Zhao, Yong WuAbstract:The Chinese central Government released a document to initiate a task of energy efficiency supervision system construction for Government Office buildings and large-scale public buildings in 2007, which marks the overall start of existing buildings energy efficiency management in China with the Government Office buildings and large-scale public buildings as a breakthrough. This paper focused on the implementing effect in the demonstration region all over China for less than one year, firstly introduced the target and path of energy efficiency supervision system, then described the achievements and problems during the implementing process in the first demonstration provinces and cities. A certain data from the energy efficiency public notice in some typical demonstration provinces and cities were analyzed statistically. It can be concluded that different functional buildings have different energy consumption and the average energy consumption of large-scale public buildings is too high in China compared with the common public buildings and residential buildings. The obstacles need to be overcome afterward were summarized and the prospects for the future work were also put forward in the end.
Mohd Zin Kandar - One of the best experts on this subject based on the ideXlab platform.
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building facade design for daylighting quality in typical Government Office building
Building and Environment, 2012Co-Authors: Mohd Zin Kandar, Mohd Hamdan Ahmad, Dilshan Remaz Ossen, Aminatuzuhariah Megat AbdullahAbstract:Daylighting is one of the potential passive strategies to improve energy performance and users' visual comfort in existing Offices without expensive installation and operational cost. For the first time, empirical study of daylighting performance was conducted for an existing typical Government Office building designed by Public Work Department (PWD) in Malaysia. Daylight field measurement of external illuminance and internal work plane illuminance was carried out. The findings demonstrated that internal daylight level in the building was insufficient despite the abundance of external daylight availability in the tropics which can achieve as high as 130 klx. Validation of simulation using Radiance-based software against the measurement under actual tropical sky indicated significant Pearson correlation of 0.709. Then, modification of window glazing and shading devices was experimented with simulation. The findings evidenced that light shelf increased daylight distribution uniformity, but failed to reduce glare on vertical plane when direct sunlight patches occurred. Integration of light shelf with partial blinds tilted at 45° showed improved performances of mean Guth Visual Comfort Probability (VCP) and CIE Glare Index. This paper concludes that simple modification of window glazing and shading device is able to provide significant improvement in tropical daylighting quantity and quality for visual comfort.
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investigating daylight quality in malaysian Government Office buildings through daylight factor and surface luminance
World Academy of Science Engineering and Technology International Journal of Civil Environmental Structural Construction and Architectural Engineering, 2011Co-Authors: Mohd Zin Kandar, Dilshan Remaz Ossen, Mohd Sabere Sulaiman, Yong Razidah Rashid, Aminatuzuhariah Mabdullah, Mansour NikpourAbstract:In recent years, there has been an increasing interest in using daylight to save energy in buildings. In tropical regions, daylighting is always an energy saver. On the other hand, daylight provides visual comfort. According to standards, it shows that many criteria should be taken into consideration in order to have daylight utilization and visual comfort. The current standard in Malaysia, MS 1525 does not provide sufficient guideline. Hence, more research is needed on daylight performance. If architects do not consider daylight design, it not only causes inconvenience in working spaces but also causes more energy consumption as well as environmental pollution. This research had surveyed daylight performance in 5 selected Office buildings from different area of Malaysian through experimental method. Several parameters of daylight quality such as daylight factor, surface luminance and surface luminance ratio were measured in different rooms in each building. The result of this research demonstrated that most of the buildings were not designed for daylight utilization. Therefore, it is very important that architects follow the daylight design recommendation to reduce consumption of electric power for artificial lighting while the sufficient quality of daylight is available. Keywords—Daylight factor, Field measurement, Daylighting quality, Tropical
Mohd Hamdan Ahmad - One of the best experts on this subject based on the ideXlab platform.
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building facade design for daylighting quality in typical Government Office building
Building and Environment, 2012Co-Authors: Mohd Zin Kandar, Mohd Hamdan Ahmad, Dilshan Remaz Ossen, Aminatuzuhariah Megat AbdullahAbstract:Daylighting is one of the potential passive strategies to improve energy performance and users' visual comfort in existing Offices without expensive installation and operational cost. For the first time, empirical study of daylighting performance was conducted for an existing typical Government Office building designed by Public Work Department (PWD) in Malaysia. Daylight field measurement of external illuminance and internal work plane illuminance was carried out. The findings demonstrated that internal daylight level in the building was insufficient despite the abundance of external daylight availability in the tropics which can achieve as high as 130 klx. Validation of simulation using Radiance-based software against the measurement under actual tropical sky indicated significant Pearson correlation of 0.709. Then, modification of window glazing and shading devices was experimented with simulation. The findings evidenced that light shelf increased daylight distribution uniformity, but failed to reduce glare on vertical plane when direct sunlight patches occurred. Integration of light shelf with partial blinds tilted at 45° showed improved performances of mean Guth Visual Comfort Probability (VCP) and CIE Glare Index. This paper concludes that simple modification of window glazing and shading device is able to provide significant improvement in tropical daylighting quantity and quality for visual comfort.
S Anand - One of the best experts on this subject based on the ideXlab platform.
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energy conservation guidelines for Government Office buildings in new delhi
Energy and Buildings, 1991Co-Authors: Peter Thomas, Bhaskar Natarajan, S AnandAbstract:Abstract New Delhi lies in a composite climatic zone, having distinct periods of cold dry, hot dry, hot humid and comfortable seasons in the year. Therefore, both space heating and cooling are required to maintain a constant degree of comfort. Being India's capital, New Delhi has over 50 central Government Office buildings. Typically, these are 5–10 storey buildings with similar activities and functions. Consequently, their energy-use patterns are likely to be similar. To estimate the potential for energy savings in these buildings, an energy audit was conducted on one of them at the request of the Government. The study showed that significant energy savings could be effected by: 1. (a) efficient operation and utilization of the building systems; 2. (b) proper maintenance of window air-conditioning units; 3. (c) use of more efficient lightning systems; 4. (d) switching from radiant heaters to convective heaters. Some phenomena peculiar to Indian Government Office buildings have been identified, and measures to conserve energy have been suggested.
