Research ArticleOpen accessEvery word in the titleEmpirical Validation of Daylight Simulation Tool with Physical Model MeasurementYaik-Wah Lim, Mohd. Hamdan Ahmad, Dilshan Remaz OssenProblem statement: In recent years, daylighting simulation tools have been increasingly used by many architects, engineers and researchers to evaluate the day lighting performances of building design. Most of these tools employ CIE sky models for simulation. However, the accuracy and applicability of these tools for tropical sky are doubtable. The aim of this study was to validate the computer … …American Journal of Applied Sciences, Vol. 7, Issue 10 · 31 Oct 2010 · 8,899 accessesView PDFCite
Literature ReviewOpen accessEvery word in the titleRetrofitting the Electric Lighting and Daylighting Systems to Reduce Energy Use in Buildings: A Literature ReviewMarie-Claude Dubois, Fabio Bisegna, Niko Gentile et al.This paper presents a literature review about energy-efficient retrofit of electric lighting and daylighting systems in buildings. The review, which covers around 160 research articles, addresses the following themes: (1) retrofitting electric lighting in buildings, (2) electric lighting energy use and saving potential and (3) lighting retrofit strategies. The retrofit strategies covered in the review are: replacement of lamp, ballast … …Energy Research Journal, Vol. 6, Issue 1 · 10 Aug 2015 · 14,592 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleDYNAMIC DAYLIGHT AND SOLAR CONTROL IN TROPICAL CLIMATEYaik-Wah LimDaylight is dynamic, thus there is no one common solution for all scenarios. It is more critical in tropical climate where the sky is predominantly intermediate; with inconsistent clouds formations which will influence the presence of direct sunlight and daylight availability. In this study, the potential of dynamic internal shading devices for improving daylighting performances in tropical climate was investigated. … …American Journal of Applied Sciences, Vol. 11, Issue 10 · 29 Apr 2015 · 7,092 accessesView PDFCite
Research ArticleOpen accessIn the keywordsIndoor Environmental Comfort in Malaysian Urban HousingYaik-Wah LimIn Malaysia, terraced houses have been rapidly constructed since 50 years ago and account for 44% of the existing urban housings. However, these houses have very limited use of natural ventilation and daylighting due to openings with small window-to-floor ratio. The deep plan design causes gloomy indoor spaces, low air change rate and poor indoor air quality. Studies showed that … …American Journal of Environmental Sciences, Vol. 9, Issue 5 · 22 Nov 2013 · 7,467 accessesView PDFCite
Research ArticleOpen accessIn the keywordsBuilding Information Modeling for Indoor Environmental Performance AnalysisYaik-Wah LimThere are increasing numbers of Building Information Modeling (BIM) software available nowadays which change the working methods in Architecture, Engineering and Construction (AEC) industry. From the stages of building design development to post-occupancy management, BIM plays an essential role in collaboration among multi-discipline professions, time and cost saving, fabrication and construction as well as facilities management. With the arising concern … …American Journal of Environmental Sciences, Vol. 11, Issue 2 · 29 Apr 2015 · 7,992 accessesView PDFCite
EditorialOpen accessIn the abstractRECENT TRENDS AND CHALLENGES OF ENERGY EFFICIENT AND SUSTAINABLE BUILDINGSChiara BedonAccording to several studies (e.g., the Intergovernmental Panel on Climate Change (IPCC, 2014), the US Energy Information Administration (US EIA, 2014), warming of the climate system is unequivocal and mainly derives from greenhouse gas emissions due to human activities. Global Carbon Dioxide (CO2) emissions from fossil fuels, for example, are estimated to be 29% higher in 2035 than they were … …American Journal of Engineering and Applied Sciences, Vol. 7, Issue 3 · 11 Sep 2014 · 8,497 accessesView PDFCite
Research ArticleOpen accessIn the abstractDetermining Road Lighting Impact on Traffic Stream CharacteristicsBen-Edigbe Johnnie, Kurnia Yuli AstridThe study is aimed at estimating road lighting impact on traffic stream characteristics; flow, speed, density and headway for an uninterrupted traffic flow. Volume, speed and headway data were collected during daylight, road lighting and dry weather conditions. Flowrate, speed, density and headways were estimated for daylight and road lighting periods; then compared. Since flowrate, free-flow speed, optimum speed critical … …American Journal of Applied Sciences, Vol. 10, Issue 7 · 2 Jul 2013 · 7,020 accessesView PDFCite
Research ArticleOpen accessIn the abstractCritical Retrospect on Conventional and Luminescent Solar Concentration DevicesHamzah Abdul-Rahman, Chen WangProblem statement: Conventional solar concentrators are only sensitive for the beam radiation and they function poorly in overcast sky conditions. Even under a clear sky condition, trackers are always needed for conventional solar concentrators. Static concentrators always come with a poor concentration rate without a tracker and the light concentrated by normal Luminescent Solar Concentrators (LSC) could not be transported … …American Journal of Environmental Sciences, Vol. 6, Issue 5 · 31 Oct 2010 · 6,924 accessesView PDFCite
Research ArticleOpen accessIn the abstractFuzzy Based Energy Management of a Domestic Photovoltaic PanelMaher Chaabene, Mohsen Ben Ammar, Ahmed ElhajjajiThis study introduces a new switching mean giving a real time optimum connection mode of domestic apparatus on either the electrical grid or a photovoltaic panel (PVP) output. A fuzzy algorithm makes the decision which ensures the optimal energy management basing on the PVP generation and apparatus states with respect to energy save criteria. Validation was driven on a 1kW … …American Journal of Applied Sciences, Vol. 4, Issue 2 · 28 Feb 2007 · 7,006 accessesView PDFCite
Technical ReportOpen accessIn the abstractCritical Evaluation of Thermal Efficiency in Aerogel Glazing Systems for Energy-Saving ApplicationsErdem CuceAerogels as a thermal superinsulation material possess a unique combination of properties, most notably low densities, and exceptionally low thermal conductivities, stemming from the high-volume fraction of air incorporated within their structure. Aerogel glazing systems have emerged as a promising solution to enhance the thermal performance of building envelopes while maintaining daylighting. With the notable reductions in production cost in … …Energy Research Journal, Vol. 15, Issue 1 · 22 Jan 2026 · 2,932 accessesView PDFCite