Abstract
This study concerning green BIM focuses on the integrated application of Building Information Modelling (BIM) and building performance analysis (BPA) software as tools for the design and analysis of building projects, and employs a sequential decision-making cycle and continuously improving design to achieve an optimal proposal consistent with environmental effectiveness. Taking a new Taichung hotel construction project energy consumption design optimization as an example, this study relied on the steps of (1) Determination of the scope of discussion of the proposal within the building life cycle, (2) Setting of energy conservation targets, (3) Accessing to external climate data, (4) Entering internal settings, (5) Implementation of energy conservation calculation module, (6) Visualization analysis and hot spot tracking (7) Proposal Revision, and (8) Optimal proposal, to verify the green BIM concept. With regard to the setting of energy conservation targets, this study recommends that building energy use intensity (EUI) be used as an energy load measurement unit of integrated performance indicators, and employs performance optimization percentage as a rating criterion. In accordance with this method, green BIM combined with assessment of green building indicators is as a means of facilitating integrated design and analysis decision-making.
Highlights
(4) Entering Internal settings: In accordance with Anderson (2014a)[23], factors influencing energy consumption during the building use stage include geometric shape information in the Building Information Modelling (BIM) model and non-geometric information required by BIM or building performance analysis (BPA), including building type, activity types, user density, shell attributes, and active systems. Parameter settings for these items are entered in BIM or BPA software, and the parameter values input for the initial proposal must comply with the lowest standards of local building codes
(10) Optimal proposal: After the optimal proposal from the conceptual massing stage entered the Design Development (DD) stage, and continuing improvement with regard to hot spot tracking, comparative analysis of the optimal proposal in the following tables revealed that the optimal proposal's energy use intensity (EUI) of 140 kWh/m2·yr represented a reduction of 13 kWh/m2·yr compared with the candidate optimal proposal in Construction Detailing (CD) stage had EUI=153 kWh/ m2·yr, which was equivalent to a performance optimization percentage 8.5% (Tables 4 & 5)
Taking energy consumption throughout the building life cycle as an example, the study verified the practical effectiveness of green BIM in the case of a new Taichung hotel construction project
Summary
In the face of a rapidly changing climate and global energy crises, how to use building information modelling (BIM) tools to obtain architectural designs offering environmental effectiveness has become a leading issue in the contemporary architectural and construction industries. BIM has two implications, one of which is information modelling, and the other of which is information management. Green BIM emphasizes the effective combination of BIM and BPA technologies in integrated design, and seeks to promote a rational building design and analysis decision-making cycle and continuously improving design to ensure the optimized development of designs offering better environmental effectiveness. The implementation of green BIM is not a trivial task, and further research and investigation is needed in the areas of software tool selection and integration, and establishment of integrated design procedures and optimal criteria
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