2:00pm - 2:15pm
Integrated Sustainability Assessment Using BIM
1CERIS, Instituto Superior Técnico - University of Lisbon, Av. Rovisco Pais 1, 1049-001, Lisboa, Portugal; 2BUILT Colab, Collaborative Laboratory for the Digital Built Environment, Rua de Álvares Cabral 306, 4050-041 Porto
The construction industry is responsible for 40% of the energy consumption and 36% of the CO2 emissions, and buildings are responsible for a significant part of energy consumption in Europe.
Thus, a growing concern regarding environmental impacts in the construction sector is in place. Reducing these impacts and optimise the design process is a major priority, and technology needs to be integrated along with the design to allow for better buildings performance. Building Information Modelling (BIM) methodology is one of the technologies that is revolutionising how the supply chain delivers the construction projects, allowing for an overview of the whole life cycle, keeping track of the data along the process, and potentiating more advanced simulations and supported decisions.
The tool proposed in this paper aims to integrate different types of sustainability analysis, namely Streamlined Life Cycle Assessment (LCA), Carbon Footprint, Life Cycle Cost (LCC) and Level(s) framework with BIM. This involves defining adequate Product Data Templates and a database structure for BIM objects, including the necessary parameters to enable designers to do holistic and dynamic assessments from early design stages to a complete LCA. Also, considering the importance of using BIM to visualise different scenarios, a graphical interface will be developed to show the key sustainability indicators and support decision-making for more sustainable buildings. The results achieved show that technology must be taken to meet Climate most ambition targets and reduce the impact of construction.
2:15pm - 2:30pm
Toolkit for the Efficient Articulation of Sustainable Strategies with Design and Management Methodologies Used by AECO Industry in Latin America.
1Pontificia Universidad Javeriana, Colombia; 2Politecnico di Torino, Italia
Digital transformation is changing the world, and with it the construction and architecture industry, however, although there are many collaborative work frameworks for digitization, and agile philosophies among different professionals, the methodologies of creative processes throughout the entire life cycle of a project that involves sustainability strategies have been greatly reduced and relegated over time. Latin America has the highest levels of biodiversity, a wide variety of climates, a range of implementations and sustainable opportunities that have been sidelined versus the speed of innovation in construction projects, in this context, the design philosophy based on nature must be implemented as a premise from leaders to developers, regardless of the management method used. This document studies the sustainable construction progress in five Latin American countries, analyzing climatic, regulatory and socioeconomic aspects, with the aim of increasing processes efficiency towards better sustainable constructions. Consequently, it proposes a methodology for the creation of an effective sustainable tool which works hand in hand with information systems and synchronous digital collaboration (BIM, VCD or IPD), in order to improve the design and management of sustainable projects throughout their life cycle through specific design strategies and design guidelines for each city, using the cities of Buenos Aires, Brasilia, Santiago, Bogotá and Lima as a case study.
2:30pm - 2:45pm
Environmental Performances Evaluation Through Building Information Models
1University of Trento, Italy; 2Fraunhofer Italia Research, Italy; 3Free University of Bolzano-Bozen, Italy
The construction industry produces several negative environmental impacts. To promote solutions that reduce these negative impacts, it is crucial to increase awareness among all parties involved in the supply chain. Currently, certification protocols, environmental labels and declarations are the most common tools for promoting sustainability in the construction industry. However, these tools are generally non-mandatory and require specific competencies to thoroughly understand and interpret their outputs, especially for non-specialized users in sustainability assessment. This paper presents a tool for visualizing environmental impacts directly through a Building Information Model, by assigning different colours to model objects according to their environmental performances. Understanding environmental performances data is thus more accessible to non-expert users. Unlike several BIM-LCA integration studies that primarily focus on the needs of designers, this contribution considers the perspective of manufacturers. The developed tool focuses on building products and has been carried out with the Autodesk Revit BIM authoring platform and its VPL-based Dynamo plug-in. Through the combination of 3D models and histograms, the tool facilitates manufacturers to visualize with real-time updates which phase of a product life cycle requires sustainable innovation, which sub-components or process determine the major environmental impacts and calculate the environmental cost indicator of a product.
2:45pm - 3:00pm
Applying Life Cycle Assessment With Minimal Information To Support Early-Stage Material Selection
Department of Architecture and Civil Engineering, University of Bath, United Kingdom
Life cycle assessment (LCA) can quantify the environmental impacts across all life cycle stages of a building, but is often too data intensive and time consuming to be used during the design process. Building design is characterised by multiple design options, tight deadlines, and constrained budgets. Design teams can rarely investigate the environmental impact of each design variant, and often rely on past experience to assess design options. This may cause repetition of environmentally-detrimental design decisions. Implementing LCA in the design process requires simplifications and assumptions. Such ‘screening’ LCAs can be undertaken during the design process, but are subject to greater uncertainty and this is not reflected in typical, single point-value LCA results. Thus, in this study we incorporate data quality scoring into a screening LCA to produce probabilistic predictions of environmental performance. We apply the method during the design of a circular bio-based wall panel. A combination of EPDs, ecoinvent and material data sheets have been used to analyse novel materials. We identify which materials are likely to provide the best environmental performance for a defined thermal performance and wall thickness. The method uses publicly available information and can be applied at material or building-element level. It thus helps designers to estimate and minimise environmental impacts – including for novel materials – without hindering the design process.
3:00pm - 3:15pm
Attitude Towards LCA in Hungary and Czechia – Results of a Survey among Building Design Professionals
1Budapest University of Technology and Economics, Department of Construction Materials and Technologies; 2Czech Technical University in Prague, University Centre for Energy Efficient Buildings
Architects and designers have a critical role in promoting Life Cycle Assessment (LCA), a scientific methodology for evaluating the environmental impacts of buildings that can help decarbonise the built environment and minimise other negative effects.
This paper presents the results of an international survey conducted among design professionals as part of the IEA Annex 72 project about assessing life cycle related environmental impacts caused by buildings. Twenty-three countries were participating in the survey altogether, but in this paper, only the specific situation in two Central European countries, Hungary and the Czech Republic, are presented. The questionnaire explored the designers’ understanding of environmental problems and LCA methodology, the drivers and barriers of environmental assessment, and the future perspectives.
The results show that many architects and designers are concerned about environmental problems and the built environment’s contribution but have a limited understanding of the applicable scientific methods. A full LCA is seldomly applied as neither regulations nor clients demand it, and only the operational energy is mandatorily assessed. Further improvements in data quality and assessment tools and regulatory and other drivers are needed to increase the use of LCA in the construction sector.
3:15pm - 3:30pm
Connected Design Decision Networks: Multi-disciplinary Decision Support for Early Building Design LCA
1Technical University of Munich, Germany; 2Norwegian University of Science and Technology, Norway; 3University of Wuppertal, Germany; 4Aalborg University, Denmark
Life Cycle Assessment (LCA) has become the standard method to evaluate environmental impact throughout the life cycle of buildings. However, detailed data about the future building as well as knowledge about the mutual influence of decisions concerning the various disciplines involved are often missing in early design phases, otherwise known to bear the highest potential for emissions savings. Hence, a meaningful basis for decision making is lacking.
This study suggests a method to digitally represent decisions and their interdependencies in early design phases and visualize their possible consequences for the life cycle of the future building. The method is based on identification of relevant processes and tasks concerning architecture and Heating Ventilation and Air Conditioning (HVAC). Decisions trees of these tasks are used as a point of departure. Connecting the decision trees to a multidimensional, Connected Design Decision Network (CDDN) enables an interdisciplinary design team to pinpoint strategic decision nodes with comparatively more interdependencies with other subsets and high influence on LCA results. We believe that a transparent decision making in early design stages can be valuable to both the design team as well as clients and contractors and bear potential for an increased mutual awareness minimizing late and expensive redesigns.