The Experts below are selected from a list of 65535 Experts worldwide ranked by ideXlab platform
Saqib Javed - One of the best experts on this subject based on the ideXlab platform.
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energy renovation of an office building using a Holistic Design approach
Journal of building engineering, 2016Co-Authors: Iason Bournas, Marwan Abugabbara, Antoni Balcerzak, Marieclaude Dubois, Saqib JavedAbstract:This paper presents a Holistic approach to perform energy renovations of office buildings. A real case study is used to demonstrate how different software can be used to facilitate the work of architects and engineers during different Design stages. Initially, the moisture safety of the building is coupled to its energy performance to define the optimum insulation level. The new interior layout is based on an initial daylight study, rather than on architectural intuition. On a second stage, shading and natural ventilation are studied to eradicate any cooling demand, while the interdependence between heating energy and daylight is assessed for the use of light-wells. To demonstrate the trade-offs between visual control and electrical lighting, different shading systems are examined for a cellular office. Finally, two alternate HVAC systems are analyzed to investigate whether passive standards can be achieved with an all-air system and/or a hydronic system.
Hongxing Yang - One of the best experts on this subject based on the ideXlab platform.
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approaching low energy high rise building by integrating passive architectural Design with photovoltaic application
Journal of Cleaner Production, 2019Co-Authors: Xi Che, Hongxing Yang, Junchao Huang, Jinqing PengAbstract:Abstract Building envelopes can highly impact the building energy demand and indoor environmental quality, so that the application of novel facade systems such as photovoltaics has been widely investigated. However, few study has addressed the interactive effect between photovoltaic (PV) application and traditional passive architectural Design strategies, which is thoroughly discussed in this comparative study using a Holistic Design optimization process. The Holistic Design optimization approach combines screening-based and variance-based sensitivity analyses with the non-dominated sorting genetic algorithm-II (NSGA-II) and hybrid generalized pattern search particle swarm optimization (HGPSPSO). The impact of the light-to-solar gain ratio (LSG) is evaluated as one of the key factor to combine the passive Design and PV glazing based on a comprehensive glazing database. Through an exhaustive sensitivity analysis (SA), the Morris method is proved to be efficient and robust in factor prioritizing only when the required minimum sampling size is satisfied. The window to ground ratio showed much greater impact on the net building energy demand when PV applications are coupled with all available vertical facades. Furthermore, the necessary particles for specified Design input dimensions are determined for the optimal performance of HGPSPSO. With the optimum Design configuration, the net building demand can be reduced by up to 71.36% under the hot summer and warm winter condition of Hong Kong. Research findings from this study can be used to develop low-energy building guidelines and building integrated PV applications in early planning stages.
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a comprehensive review on passive Design approaches in green building rating tools
Renewable & Sustainable Energy Reviews, 2015Co-Authors: Xi Chen, Hongxing Yang, Lin LuAbstract:Buildings are the major consumers of energy in Hong Kong and most urban areas in the world. Building environmental assessment schemes, and green building rating tools (GBRTs) have been adopted by architects, engineers and researchers for more than 20 years to help promote more sustainable construction activities. Each rating tool highlights energy use as a significant portion of the assessment and provides guidance on more energy efficient strategies. Building energy efficiency can usually be improved by both passive and active technologies. Active Design involves making more energy efficient heating, ventilation, air-conditioning (HVAC) systems, hot water production, lighting and any other building services application, whereas passive Design focuses more on building envelope related aspects determined by the architectural Design so as to reduce the demand of the building for energy. Recently, there has been renewed interest in passive strategies because of the low extra investment and the potential benefits in energy saving. The passive Design approach has also been recognized in the latest versions of green building rating tools. Five representative rating systems, which all developed their own passive Design criteria leading to the award of credits, are subject to comparative examinations in respect of the comprehensiveness, effectiveness and accuracy of each criterion in this paper. Passive Design criteria including the building layout, envelope thermophysics, building geometry, air-tightness and infiltration performance and their effects on building energy consumption are also comprehensively reviewed. The results show that a Holistic Design approach based on passive energy saving strategies proves to be an effective way to reduce building energy budgets. However, more consolidated weighting systems to enable comparison of different passive strategies should be incorporated in green building rating tools based on further sensitivity and parametric studies.
Jack Chin Pang Cheng - One of the best experts on this subject based on the ideXlab platform.
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Holistic bim framework for sustainable low carbon Design of high rise buildings
Journal of Cleaner Production, 2018Co-Authors: Vincent J L Gan, Min Deng, K T Tse, Chun Man Chan, Jack Chin Pang ChengAbstract:Abstract In high-density, high-rise cities such as Hong Kong, buildings account for nearly 90% of energy consumption and 61% of the carbon emissions. Therefore, it is important to study the Design of buildings, especially high-rise buildings, so as to achieve lower carbon emissions. The carbon emissions of a building consist of embodied carbon from the production of construction materials and operational carbon from energy consumption during daily operation (e.g., air-conditioning and lighting). While most of the previous studies concentrated mainly on either embodied or operational carbon, an integrated analysis of both types of carbon emissions can improve the sustainable Design of buildings. Therefore, this paper presents a Holistic framework using building information modeling (BIM) technology in order to enhance the sustainable low carbon Design of high-rise buildings. BIM provides detailed physical and functional characteristics of buildings that can be integrated with various environmental modeling approaches to achieve a Holistic Design and assessment of low carbon buildings. In a case study, the proposed framework is examined to evaluate the embodied and operational carbon in a high-rise residential building due to various envelope Designs. The results demonstrate how the BIM framework provides a decision support basis for evaluating the key carbon emission sources throughout a building's life cycle and exploring more environmentally sustainable measures to improve the built environment.
Bo Norregaard Jorgensen - One of the best experts on this subject based on the ideXlab platform.
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deep energy renovation of the maersk office building in denmark using a Holistic Design approach
Energy and Buildings, 2017Co-Authors: Muhyiddine Jradi, Christian Veje, Bo Norregaard JorgensenAbstract:Abstract This study targets the office buildings sector in Denmark considering a case study of the Maersk Building, located at the University of Southern Denmark Odense campus, aiming to improve its energy performance and reduce heating and electricity consumption. The current work is carried out under the COORDICY project aiming to establish a new methodology for non-residential and public buildings deep energy renovation. The methodology is based on a Holistic Design approach taking into account the dynamic building energy performance to analyse and evaluate retrofit measures and packages, instead of the static approach and conventional estimations currently in use. A detailed Holistic energy model for the Maersk office building was developed using a package of Sketchup Pro, OpenStudio and EnergyPlus tools to simulate the dynamic energy performance of the building taking into account various characteristics and specifications. The model was calibrated against actual utility data and under actual weather conditions. It was shown that the building overall primary energy consumption is as high as 176.11 kWh/m 2 of the indoor heated area, of which 65% is for space heating and domestic hot water. Various retrofit measures were implemented and analysed to improve the energy performance of the building. Based on the analysis, 8 deep energy renovation packages were developed and evaluated. A favourable package was highlighted comprising efficient lights, daylights sensors in open spaces and corridors, roof and exterior walls insulation and managing heating set point schedules. This deep energy retrofit package reduces the primary energy consumption to 70.44 kWh/m 2 , allowing the building to comply with the BR10 Danish building regulation. Additional reduction in the energy consumption was achieved through installing a 20 kWp PV system on the building roof, making the building eligible to be classified as 2015 low energy class building with 41.39 kWh/m 2 energy consumption.
Lin Lu - One of the best experts on this subject based on the ideXlab platform.
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a comprehensive review on passive Design approaches in green building rating tools
Renewable & Sustainable Energy Reviews, 2015Co-Authors: Xi Chen, Hongxing Yang, Lin LuAbstract:Buildings are the major consumers of energy in Hong Kong and most urban areas in the world. Building environmental assessment schemes, and green building rating tools (GBRTs) have been adopted by architects, engineers and researchers for more than 20 years to help promote more sustainable construction activities. Each rating tool highlights energy use as a significant portion of the assessment and provides guidance on more energy efficient strategies. Building energy efficiency can usually be improved by both passive and active technologies. Active Design involves making more energy efficient heating, ventilation, air-conditioning (HVAC) systems, hot water production, lighting and any other building services application, whereas passive Design focuses more on building envelope related aspects determined by the architectural Design so as to reduce the demand of the building for energy. Recently, there has been renewed interest in passive strategies because of the low extra investment and the potential benefits in energy saving. The passive Design approach has also been recognized in the latest versions of green building rating tools. Five representative rating systems, which all developed their own passive Design criteria leading to the award of credits, are subject to comparative examinations in respect of the comprehensiveness, effectiveness and accuracy of each criterion in this paper. Passive Design criteria including the building layout, envelope thermophysics, building geometry, air-tightness and infiltration performance and their effects on building energy consumption are also comprehensively reviewed. The results show that a Holistic Design approach based on passive energy saving strategies proves to be an effective way to reduce building energy budgets. However, more consolidated weighting systems to enable comparison of different passive strategies should be incorporated in green building rating tools based on further sensitivity and parametric studies.
