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Tim Johansson
Department of Civil, Environmental and Natural Resources Engineering, Lulea University of Technology, 97187 Lulea, Sweden

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Journal article
Published: 22 May 2018 in Sustainability
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The European building stock was renewed at a rapid pace during the period 1950–1975. In many European countries, the building stock from this time needs to be renovated, and there are opportunities to introduce energy efficiency measures in the renovation process. Information availability and increasingly available analysis tools make it possible to assess the impact of policy and regulation. This article describes methods developed for analyzing investments in renovation and energy performance based on building ownership and inhabitant socio-economic information developed for Swedish authorities, to be used for the Swedish national renovations strategy in 2019. This was done by analyzing measured energy usage and renovation investments made during the last 30 years, coupled with building specific official information of buildings and resident area characteristics, for multi-family dwellings in Gothenburg (N = 6319). The statistical analyses show that more costly renovations lead to decreasing energy usage for heating, but buildings that have been renovated during the last decades have a higher energy usage when accounting for current heating system, ownership, and resident socio-economic background. It is appropriate to include an affordability aspect in larger renovation projects since economically disadvantaged groups are over-represented in buildings with poorer energy performance.

ACS Style

Mikael Mangold; Magnus Österbring; Conny Overland; Tim Johansson; Holger Wallbaum. Building Ownership, Renovation Investments, and Energy Performance—A Study of Multi-Family Dwellings in Gothenburg. Sustainability 2018, 10, 1684 .

AMA Style

Mikael Mangold, Magnus Österbring, Conny Overland, Tim Johansson, Holger Wallbaum. Building Ownership, Renovation Investments, and Energy Performance—A Study of Multi-Family Dwellings in Gothenburg. Sustainability. 2018; 10 (5):1684.

Chicago/Turabian Style

Mikael Mangold; Magnus Österbring; Conny Overland; Tim Johansson; Holger Wallbaum. 2018. "Building Ownership, Renovation Investments, and Energy Performance—A Study of Multi-Family Dwellings in Gothenburg." Sustainability 10, no. 5: 1684.

Conference paper
Published: 14 August 2017 in ICCREM 2016
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Road projects generally begin with broad investigations and progressively advance towards more detailed and immediate issues. Road corridors, which represent rough locations of alternative road alignments, are usually identified, evaluated, and compared in early planning stages. Commonly at this stage, costs estimates of the identified road alignment are made, whereas their environmental impacts, such as greenhouse gas (GHG) emissions, often are insufficiently accounted for. GHG emissions caused by the construction process are frequently ignored altogether. Despite indications that benefits of decisions and measures can be considerably higher if implemented in early planning stages, much emphasis is put on later stages. Our study presents an approach for estimating project-based GHG emissions of alternative alignments in early planning stages. The findings indicate that if adopted in the planning process, the approach can support projects in reducing their GHG emissions.

ACS Style

Jan Krantz; Tim Johansson. Evaluating Construction-Based Greenhouse Gas Emissions of Alternative Road Alignments. ICCREM 2016 2017, 1 .

AMA Style

Jan Krantz, Tim Johansson. Evaluating Construction-Based Greenhouse Gas Emissions of Alternative Road Alignments. ICCREM 2016. 2017; ():1.

Chicago/Turabian Style

Jan Krantz; Tim Johansson. 2017. "Evaluating Construction-Based Greenhouse Gas Emissions of Alternative Road Alignments." ICCREM 2016 , no. : 1.

Journal article
Published: 01 February 2017 in Journal of Cleaner Production
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ACS Style

Jan Krantz; Weizhuo Lu; Tim Johansson; Thomas Olofsson. Analysis of alternative road construction staging approaches to reduce carbon dioxide emissions. Journal of Cleaner Production 2017, 143, 980 -988.

AMA Style

Jan Krantz, Weizhuo Lu, Tim Johansson, Thomas Olofsson. Analysis of alternative road construction staging approaches to reduce carbon dioxide emissions. Journal of Cleaner Production. 2017; 143 ():980-988.

Chicago/Turabian Style

Jan Krantz; Weizhuo Lu; Tim Johansson; Thomas Olofsson. 2017. "Analysis of alternative road construction staging approaches to reduce carbon dioxide emissions." Journal of Cleaner Production 143, no. : 980-988.

Journal article
Published: 01 May 2016 in Energy Conversion and Management
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Enhanced dissemination of information regarding energy saving and climate change targeted toward property owners is considered to be an important strategy in order to reach the Swedish national target of energy efficiency in the building sector by 2050. Here the municipality energy advisors and the national register for energy performance certificates can facilitate the mitigation of energy use in the building stock. So far few studies have focused on the practical road map to the national target of energy use on the city/district level and to the communication aspects with stakeholders in the creation of energy city models. In this paper a city energy model is developed based on the requests and need for visualization from a group of energy advisors. Six different scenarios are studied in order to analyze the possibility of reaching the energy targets specified by the government in the town of Kiruna. The results show that: (1) it is possible to automatically create city energy models using extract, transform and load tools based on spatial and non-spatial data from national registers and databases; (2) city energy models improve the understanding of energy use in buildings and can therefore be a valuable tool for energy advisors, real estate companies and urban planners. The case study of Kiruna showed that the proposed energy saving measures in the energy performance certificates need to be implemented and new buildings in the urban transformation must be of high energy standard in order to reach the national target in Kiruna.

ACS Style

Tim Johansson; Mattias Vesterlund; Thomas Olofsson; Jan Dahl. Energy performance certificates and 3-dimensional city models as a means to reach national targets – A case study of the city of Kiruna. Energy Conversion and Management 2016, 116, 42 -57.

AMA Style

Tim Johansson, Mattias Vesterlund, Thomas Olofsson, Jan Dahl. Energy performance certificates and 3-dimensional city models as a means to reach national targets – A case study of the city of Kiruna. Energy Conversion and Management. 2016; 116 ():42-57.

Chicago/Turabian Style

Tim Johansson; Mattias Vesterlund; Thomas Olofsson; Jan Dahl. 2016. "Energy performance certificates and 3-dimensional city models as a means to reach national targets – A case study of the city of Kiruna." Energy Conversion and Management 116, no. : 42-57.

Journal article
Published: 22 February 2016 in Sustainability
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Social sustainability is a widely used concept in urban planning research and practice. However, knowledge of spatial distributions of social values and aspects of social sustainability is required. Visualization of these distributions is also highly valuable, but challenging, and rarely attempted in sparsely populated urban environments in rural areas. This article presents a method that highlights social values in spatial models through 3D visualization, describes the methodology to generate the models, and discusses potential applications. The models were created using survey, building, infrastructure and demographic data for Gällivare, Sweden, a small city facing major transformation due to mining subsidence. It provides an example of how 3D models of important social sustainability indices can be designed to display citizens’ attitudes regarding their financial status, the built environment, social inclusion and welfare services. The models helped identify spatial variations in perceptions of the built environment that correlate (inter alia) with closeness to certain locations, gender and distances to public buildings. Potential uses of the model for supporting efforts by practitioners, researchers and citizens to visualize and understand social values in similar urban environments are discussed, together with ethical issues (particularly regarding degrees of anonymity) concerning its wider use for inclusive planning.

ACS Style

Tim Johansson; Eugenia Segerstedt; Thomas Olofsson; Mats Jakobsson. Revealing Social Values by 3D City Visualization in City Transformations. Sustainability 2016, 8, 195 .

AMA Style

Tim Johansson, Eugenia Segerstedt, Thomas Olofsson, Mats Jakobsson. Revealing Social Values by 3D City Visualization in City Transformations. Sustainability. 2016; 8 (2):195.

Chicago/Turabian Style

Tim Johansson; Eugenia Segerstedt; Thomas Olofsson; Mats Jakobsson. 2016. "Revealing Social Values by 3D City Visualization in City Transformations." Sustainability 8, no. 2: 195.

Proceedings article
Published: 25 September 2015 in ICCREM 2015
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The construction and operation of buildings account for a significant part of the energy use and greenhouse gas emissions. Most design approaches to reduce the use of energy are focusing on the operational phase of a building’s life. Consequently, the embodied energy from the upstream flow, including production of building material and components, transport and assembly on-site, is often disregarded in the development of energy-efficient buildings. The purpose of this research is to propose a method to facilitate the assessment of the embodied energy and carbon footprint during the design and planning stage from the production of building material and components including the transportation to site. The framework makes use of environmental product declaration (EPD) and supply chain information stored in a relational database of building materials and components, building information models (BIM) for the assessment of the embedded energy in the building. Further, the feature manipulation engine (FME) is used to track transportation distances and transportation times from Google Map (GM) for the assessment of embedded energy from supplier to the construction site. Finally, a prototype is developed to demonstrate the practical application of the framework and to observe possible limitations and barriers.

ACS Style

Farshid Shadram; Tim Johansson; Weizhuo Lu; Thomas Olofsson. An Integrated BIM-Based Framework for the Energy Assessment of Building Upstream Flow. ICCREM 2015 2015, 107 -118.

AMA Style

Farshid Shadram, Tim Johansson, Weizhuo Lu, Thomas Olofsson. An Integrated BIM-Based Framework for the Energy Assessment of Building Upstream Flow. ICCREM 2015. 2015; ():107-118.

Chicago/Turabian Style

Farshid Shadram; Tim Johansson; Weizhuo Lu; Thomas Olofsson. 2015. "An Integrated BIM-Based Framework for the Energy Assessment of Building Upstream Flow." ICCREM 2015 , no. : 107-118.

Proceedings article
Published: 17 June 2014 in Computing in Civil and Building Engineering (2014)
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Energy conservation measures are needed to prevent the world from moving in an unsustainable direction. Actions targeting the building sector are especially vital since it stands for a large share of the total energy use. The objective of this research is, therefore, to provide a framework for using visualization of aggregated energy use over time in a district heating network to stakeholders. This is fulfilled by integrating building information and energy data from a district heating supplier. The integration of building information and energy data makes it possible to identify high energy consumers through a performance visualization interface. Furthermore, the interface is connected to a collaboration hub which offers a communication opportunity between consumers, suppliers, energy advisors and urban planners. Additionally, a stakeholder management approach is proposed to support the energy advisor in managing and selecting the consumers to target with advice and actions. The visualization, collaboration and the stakeholder component of the proposed system creates a Planning Support System (PSS) by which the citizens, energy advisors and urban planners can monitor the use of energy and also suggest actions to decrease the energy use of buildings. The next step of this research will be to evaluate and test the PSS together with energy advisors of 20 municipalities in Sweden.

ACS Style

Tim David Johansson; Thomas Olofsson. A Stakeholder Planning Support System for District Heating Systems. Computing in Civil and Building Engineering (2014) 2014, 713 -720.

AMA Style

Tim David Johansson, Thomas Olofsson. A Stakeholder Planning Support System for District Heating Systems. Computing in Civil and Building Engineering (2014). 2014; ():713-720.

Chicago/Turabian Style

Tim David Johansson; Thomas Olofsson. 2014. "A Stakeholder Planning Support System for District Heating Systems." Computing in Civil and Building Engineering (2014) , no. : 713-720.