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Life cycle assessment (LCA) in the building sector has become a widely used method for quantifying environmental impacts of a building over its entire life cycle. Currently, however, no standardized procedure exists for considering refurbishment measures. In addition, the LCA, according to the European standard EN 15978, is limited to building level only. This paper shows how a methodological LCA framework of refurbishment methods can be applied at three levels: single building, neighbourhood, and municipality. Initially, the proposed methodological approaches are introduced while the framework rules are defined for each of the three levels. The system boundaries of the LCA differ regarding the assessment levels within the given methodology and are adapted accordingly. In addition, the three levels of assessment are defined by the accuracy of measurement results, and data requirements, as well as by the specific value of the calculations and the ownership of the building stock. The assessment levels provide a specific quality and quantity of environmental indicator results. Thus, the complex interrelationships of the assessment levels are shown. The developed framework for the environmental assessment of refurbishment measures provides comparability at the building level. At the neighbourhood level, emissions from refurbishment measures are compared with the reductions of emissions through heating energy demand. Ultimately, the potential of refurbishment measures at the municipal level can be identified on a large scale and used as a decision-making tool.
11:45am - 12:00pm
Land Use Change Impact on Urban Land Surface Temperatures: A GIS-supported Satellite-based Case Study
Caroline WALDER, Pelin FIRAT ORS, Ardeshir MAHDAVI
TU Wien, Austria
This paper illustrates the use of GIS techniques and satellite data in order to analyze the impact of land use change on the local urban microclimate. Specifically, a case study is presented that concerns the city of Vienna. Thereby, satellite-based images were used to classify the city of Vienna into four zones toward the computation of land surface temperatures in two reference years. The classified maps were then statistically projected into the future, resulting in predicted land surface temperatures. The findings highlight the relationship between urbanization and temperature rise in the urban context. The study used data from Landsat 8 satellite in 2013 and 2020. Land cover maps were generated with QGIS for past and current conditions and future land cover maps were projected and corresponding land surface temperatures were predicted. The analysis of satellite data highlighted land surface temperature increase in the city of Vienna. This rise in land surface temperatures correlates with urbanization-driven change in land use and land cover.
12:00pm - 12:15pm
From Intelligent Building to Smart City - A Case Study
Dennis Heung-fu MUI
Alpine Capital Limited, Hong Kong S.A.R. (China)
This paper is to provide some insights to professionals on the evolution of smart city, to present its concept and appropriate elements based on the author’s 40 years of experience in international building development projects.
With the oil crisis in the 1970s, the use of alternative energy sources such as solar energy and energy saving measures were explored to combat the threat of fossil fuel supply. The concept of intelligent building to improve the productivity of the occupants and energy saving was then emerged in 1980s, followed by the focusing of the built environment like green building and sustainable construction in the 1990s. Various metrics were developed by different countries for assessing green building provisions e.g. LEED. Building resilience has recently become popular for abating the increasing natural disasters. Examples of such types of buildings in Southeast Asia were cited to illustrate the necessary technology to make the building intelligent, green, sustainable or resilient.
On a more macro scale, with the rapid advancement of ICT in recent years, the concept of smart city has been advocated. The various definitions of smart building would first be depicted. Based on these definitions, the attributes of smart building and the respective features were suggested. The appraisal of the current design provisions of a mixed development special economic zone project of 57 ha in Southeast Asia was then illustrated with suggestions on what further elements should be added to enhance its smart city characteristics.
12:15pm - 12:22pm
How Municipalities Should Approach the Transformation Of Public Space
Michaela MALÁ1, Martina SÝKOROVÁ1, Licia FELICIONI1,2
1Czech Technical University in Prague, University Centre for Energy Efficient Buildings, Třinecká 1024, 273 43 Buštěhrad, Czech Republic; 2Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 2077/7, 166 29 Prague, Czech Republic
Public spaces are the living rooms of cities, accessible to everyone without any restrictions. Public spaces are the calling card of the city; they are where the community comes together. Their design either enables or complicates community life. From a visitor's point of view, public spaces are the first things to be noticed and encountered in a city. Due to various circumstances, public spaces sometimes fail to meet the abovementioned features or do not fulfil them to the degree they should. Thus, the presented methodology guidelines may help small cities representatives who do not have the professional or personnel capacity to deal with public spaces through planning, preparation and contracting the public spaces studies, which leads to a quality assessment of public spaces. The guidelines also include tips for improving public spaces, recommended practices for public participation in planning the transformation of public areas, and a site assessment form for a non-expert's perspective.