| 1. |
- Pardalis, Georgios, 1983-, et al.
(författare)
-
Kundresa för One-Stop-Shop
- 2022
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Den här guiden är en av tre guider som publiceras inom detta projektoch bygger på tidigare forskning, med syftet att utveckla kunskap och metoder för aktörer på efterfråge- och utbudssidan på marknaden för energieffektiv renovering av villor. Guiden ger en översikt över den kundresa som villaägare följer i sitt beslut att genomföra eller inte att energirenovera sin villa, och hur One-stop-shop (OSS) konceptet kan bidra med renoveringsresan.
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| 2. |
- Rupar-Gadd, Katarina, 1974-, et al.
(författare)
-
Evaluation of increased electricity production when cooling solar panels
- 2022
-
Ingår i: SBE22Delft - Innovations for the Urban Energy Transition. - Bristol, United Kingdom : Institute of Physics (IOP).
-
Konferensbidrag (refereegranskat)abstract
- A municipal housing company located in the south of Sweden has energy renovatedseveral buildings with a total of 380 apartments to meet today’s energy standards. Several energyefficient technologies and solutions were implemented and the energy consumption for thesebuildings were lowered by 50%. One of the buildings functions as a demonstration building forinnovative solutions such as low temperature district heating, waste water heat recovery, andsolar photovoltaic and thermal (PVT) panels. The solar PVT panels are cooled down with themain purpose to increase the electricity production. The cooling medium for these panels iscirculated through two bedrock boreholes to dissipate the collected heat. The heat from theboreholes is then used for an electric heat pump to produce heat to send to the local districtheating company. The electricity produced is primarily used in the building. The objective ofthis paper is to assess the electricity production from real-life outdoor Photovoltaic-thermal(PVT) plant. The plant was installed on the roof top of an energy renovated multi-familyapartment building located in the south of Sweden. The cooling of the panels were turned on andoff to assess if the electricity production would increase or not. The electricity production didnot increase when the cooling was applied. The temperature measuring equipment which wasinstalled at the wrong position and was supposed to measure the temperature at the back of thePVT is needed to compare the efficiency of the PVT plant and draw further conclusions.
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| 3. |
- Rupar-Gadd, Katarina, 1974-, et al.
(författare)
-
Evaluation of smart energy solutions in a multifamily apartment building in Småland, Sweden
- 2021
-
Ingår i: eceee Summer Study on Energy Efficiency. - : European Council for an Energy Efficient Economy (ECEEE). - 9789198387889 ; , s. 999-104
-
Konferensbidrag (refereegranskat)abstract
- A municipal housing company in the south of Sweden constructed three energy efficient multi-family apartment buildings in 2020 in which smart technologies were implemented. One of the buildings with a total heated area of 976 m2 is designed to have a primary energy number of 19.3 kWh/ m2 /year compared to the 85 kWh/m2/year as required by the Swedish Building Regulations. Apart from building envelope energy efficiency measures solar panels were installed and the excess electricity produced is stored to a battery. The excess heat from the solar panels is used in the bedrock heating system with cooling possibilities. The aim of this energy solution is to make the buildings partially off-grid. The actual electricity produced from the solar hybrid panels is so far lower than the simulated self-consumption and the battery is not used to its full potential. The rainwater collected was enough to save 75 percent of drinking water volume normally used for toilet flushing according to calculations made from incomplete data. A faulty installed meter, a fire incident, the use of several different systems and companies for collecting and logging data, and many other contributing factors affecting the possibility to evaluate the installed smart energy systems needs to be remediated. A recommendation is to assign someone the role of energy coordinator with the purpose of making evaluation possible within one year.
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| 4. |
- Sula, Migena, 1986-, et al.
(författare)
-
Adopting Space Sufficiency Interventions as a Means for Accelerating Energy Renovation : Swedish Homeowners’ Perspective
- 2023
-
Ingår i: Proceedings of the International Conference “Sustainable Built Environment and Urban Transition”. - : Linnaeus University Press. - 9789180820424
-
Konferensbidrag (refereegranskat)abstract
- Residential energy consumption remains a significant driver of CO2 emissions in European buildings, demanding urgent action in the face of the climate crisis. While prevailing efforts have predominantly concentrated on enhancing energy efficiency and integrating renewable sources, addressing the climate urgency and resource constraints necessitates a paradigm shift towards sufficiency principles. Swedish statistics on Single-Family Houses (SFH) show that more than a third of households inhabit oversized spaces in aging buildings needing renovation. Sufficiency-oriented renovation strategies—optimizing, or reducing living areas per capita— present a promising avenue to achieve substantial energy reductions. This approach also opens the potential for space rentals, yielding combined energy and space efficiency advantages. In addition, the literature highlights reduced maintenance costs and potential urban housing crisis mitigation. However, practical implementation faces multiple obstacles.This paper investigates SFH owners' attitudes towards space-sufficiency interventions, focusing on living size preferences and identifying barriers and opportunities for sustainable housing. Through focus group sessions with SFH owners in November-December 2022, qualitative content analysis revealed that reducing living space per capita faces multifaceted challenges, despite potential benefits.These challenges encompass not only personal and psychological considerations but extend to economic, infrastructural, and policy barriers, including issues such as the potential breach of privacy, disruptions due to noise, dilemmas related to ownership and independency, disruptions to work-life dynamics, inadequate familiarity with sufficiency principles, and uncertainty imposed by space constraints. Strategic integration of sufficiency principles into energy-renovation policy alternatives necessitates a holistic approach that addresses these barriers, and some form of incentives may be needed to catalyze the adoption of sufficiency principles effectively.
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| 5. |
- Aarthi, Aishwarya Devendran, et al.
(författare)
-
Implementation of GIS-AHP Framework for the Identification of Potential Landfill Sites in Bengaluru Metropolitan Region, India
- 2023
-
Ingår i: The 9th International Conference on Energy and Environment Research. ICEER 2022.. - : Springer. - 9783031435584 - 9783031435591
-
Konferensbidrag (refereegranskat)abstract
- Uncontrolled open dumping and burning of municipal solid waste (MSW) has resulted in soil, water, and air pollution in many urban cities in India. Landfills are the most common cost-effective solution for MSW management in many developing countries like India. However, the identification of suitable landfill sites always remains a challenging task as it involves the selection of several environmental criteria set by the local authorities. The objective of this study is to identify the most potential landfill sites proposed by the Government in Bengaluru Metropolitan Region, Karnataka state, India using Geographic Information System enabled Analytical Hierarchy Process based multi-criteria evaluation technique. Several criteria and constraints as recommended by the local authorities along with the proximity to the solid waste processing plants are used to identify the potential landfill sites in the study region. The study identified three highly suitable sites (Neraluru, Gudhatti, Madivala) for landfills which are not only environmentally sustainable but also economically attractive as they are closer to the solid waste processing plants minimizing the transportation cost involved in the disposal of solid waste from the source to the final disposal sites in the study region.
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| 6. |
- Almeida, Roma, 1982-, et al.
(författare)
-
Analytical review of methodological approaches for measuring circularity in building renovation
- 2023
-
Ingår i: Proceedings of the International Conference “Sustainable Built Environment and Urban Transition”. - Växjö : Linnaeus University Press. - 9789180820424
-
Konferensbidrag (refereegranskat)abstract
- Circularity in construction industry requires understanding of the complex system dynamics, which are affected by various building layers and societal systems. While the existing building stock offers opportunities to enable re-looping of construction and demolition waste, the assessment of building circularity performance is not straightforward, due to lack of standard database, methods, and tools. This may lead to subjective interpretations by practitioners who rely on lifecycle assessment (LCA) approach complemented with circularity indicators (C-indicators) to know the level of circularity (LOC) of building materials, components, and elements. Thus, these C-indicators requires careful evaluation of the current methodological approaches. The aim of this paper is to map and evaluate the nexus between assessment methodologies highlighting their strengths, limitations, and areas of improvement. In this study, a complementary approach of systematic literature review and design research concept was used to classify seven primary aspects covering 18 key performance indicators, that impact the system thinking approach of the renovation project. The critical analysis of ten distinguished C-indicators show conditional, beneficial and trade-off relationships between various indicators. At the same time, the dynamic aspect of re-looping the resources is missing in these indicators and sustainability is accounted by complementing lifecycle impacts rather than coupling them. Results of this review highlight substantial gaps in C-indicators applicability for renovation projects with emphasis to formulate a practical guidance to assess recirculation of materials throughout the value chain.
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| 7. |
- Dadvar, Atefeh, et al.
(författare)
-
Water Use Behavior in a Multicultural Urban Area in Sweden
- 2021
-
Ingår i: Sustainability. - : MDPI. - 2071-1050. ; 13:15
-
Tidskriftsartikel (refereegranskat)abstract
- The increasing world population and climate change are major concerns for the supply of water needs. Understanding user behavior facilitates the development of effective strategies of domestic water management. This research applied a questionnaire survey and data analysis methods to analyze the water consumption behavior of tenants in a multicultural urban area, dominated by immigrants of different ethnic origins, in the city of Växjö in Sweden. Results showed that the majority of the studied participants perceived themselves to be environmentally friendly. They reported to be engaged in water conservation activities quite often, but analysis showed that they did not have accurate perceptions of their water consumption. Positive attitudes towards water conservation and self-reported water conservation activities significantly but negatively influenced respondents’ actual water consumption, i.e., water consumption was higher. Subjective norms did not have a significant influence. The results also revealed that individual measurement and debit positively influenced, i.e., reduced, actual water consumption. Therefore, water management systems should include an individual measurement and debit system combined with a visualization system to enable tenants to monitor the quantity and cost of their water consumption.
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| 8. |
- Devendran, Aarthi Aishwarya, 1986-, et al.
(författare)
-
Analysis of influence of landuse/land cover changes on the land surface temperature of Växjö Municipality, Sweden
- 2021
-
Ingår i: eceee 2021 Summer Study on energy efficiency. - : European Council for an Energy Efficient Economy (ECEEE). - 9789198387889 ; , s. 627-635
-
Konferensbidrag (refereegranskat)abstract
- Human activities are responsible for almost 75% of the land cover changes depleting the natural resources globally. These land cover changes with decreasing vegetation and water bodies increase the heat emissions from the land surface thereby influencing the climate changes regionally and globally. This paper highlights the interaction and interlinkages between the land use changes due to human activities (Sustainable Development Goal (SDG) 15) and its consequences on climate changes (SDG 13) using spatial analysis techniques. In this context, the climate change of Växjö Municipality, Sweden resulting from the urban development is demonstrated through LST (Land Surface Temperature), NDVI (Normalised Difference Vegetation Index), NDBI (Normalised Difference Built-Up Index) and land cover changes as indicators through Landsat 8 data of 2014, 2016, 2018 and 2020. The land cover maps prepared through Support Vector Machine algorithm indicate that the area of built-up had doubled during the study periods with decreasing openlands. The LST maps prepared from the thermal bands of the Landsat 8 data showed an increase in the mean surface temperature from 7.3℃ to 11.1℃ between 2014 and 2020. The study also aims to study the seasonal variations in the relationship between LST, NDVI and NDBI by making use of Landsat 8 dataset acquired during the spring, summer, and autumn seasons of 2019. Results suggest a strong positive relationship between LST and NDBI (0.74) whereas a negative relationship is found associated between LST and NDVI (0.65) and between NBDI and NDVI (0.71). Further the land cover and LST maps of 2014 and 2020 are used in the simulation of urban and LST maps of 2050 through Cellular Automata model to highlight the impact of urban development on the climate changes of Växjö Municipality. The simulation result predicts that the built-up area of 2020 might quadruple in 2050. The simulation analysis also predicted an increase in LST with increasing urbanization in the study region. This study emphasises that the land cover changes in the process of urban development is also a contributing factor for climate change in the study region which is evident from the increase in mean surface temperature (3.8°C) from 2014 to 2020.
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| 9. |
- Devendran, Aarthi Aishwarya, 1986-, et al.
(författare)
-
Identification of potential landfill sites in Bengaluru metropolitan region, India through GIS-AHP framework
- 2021
-
Ingår i: ICEER2021 - 8th International Conference on Energy and Environment Research:“Developing the World in 2021 with Clean and Safe Energy. - : ICEER.
-
Konferensbidrag (refereegranskat)abstract
- Uncontrolled open dumping and burning of municipality solid waste (MSW) has resulted in soil, water, and air pollution in many urban cities in India. Landfills are the most common cost-effective solution for MSW management in many developing countries like India. However, the identification of suitable landfill sites always remains a challenging task as it involves selection of several environmental criteria set by the local authorities. The objective of this study is to identify the most potential landfill sites proposed by the Government in Bengaluru Metropolitan Region, Karnataka state, India using Geographic Information System enabled Analytical Hierarchy Process based multi-criteria evaluation technique. Several criteria and constraints as recommended by the local authorities along with the proximity to the solid waste processing plants are used to identify the potential landfill sites in the study region. The study identified three highly suitable sites (Neraluru, Gudhatti, Madivala) for landfills which are not only environmentally sustainable but also economically attractive as they are closer to the solid waste processing plants minimizing the transportation cost involved in the disposal of solid waste from the source to the final disposal sites in the study region.
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| 10. |
- Devendran, Aarthi Aishwarya, 1986-, et al.
(författare)
-
Optimization of Municipal Waste Streams in Achieving Urban Circularity in the City of Curitiba, Brazil
- 2023
-
Ingår i: Sustainability. - : MDPI AG. - 2071-1050. ; 15:4
-
Tidskriftsartikel (refereegranskat)abstract
- The municipal solid waste (MSW) remains a great challenge in most cities of developing countries, as the majority of the generated waste is either not collected or is dumped in open uncontrolled non-engineered landfill sites, creating significant pollution due to the leakage of landfill leachate in the surrounding environment. In developing countries, a complete transition to a zero-landfill scenario is less likely to happen in the near future due to various socio-economic challenges. Therefore, the existing landfills in developing countries need holistic waste management thinking with more efforts on waste to energy conversions. This study highlights the challenges with existing MSW management practices of Curitiba, Brazil, and suggests some holistic and sustainable landfill management techniques. This is accomplished through the (i) identification of the suitable sites for setting up transfer stations (TSs), (ii) route optimization for MSW transportation, and (iii) analysis of the life expectancy of the existing landfill with waste valorization techniques for enhancing circularity of MSW of the city. The study has identified six potential TSs, making use of various geological criteria and constraints as suggested by the United States Environmental Protection Agency using GIS-based spatial analysis, which could save fuel cost of approximately 1.5 million Brazilian Real (BRL) per year for the solid waste transportation (from the source to the landfill site). This research has also made a value addition in this specific field with the preparation of a digitized road network map of the study region. Further, the sensitivity-based scenario analysis highlights that the lifespan of the existing landfill (until 2030) might be extended to 2058 if the city achieves the targeted recycling rate of 85% compared with the current rate of 23%. The results would be useful for policy-makers to adopt the crucial MSW scenario to achieve a circular economy in the waste management of the city of Curitiba.
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| 11. |
- Devendran, Aarthi Aishwarya, 1986-, et al.
(författare)
-
Spatial interaction model of energy demand of buildings and satellite thermal imageries using Geographically Weighted Regression analysis
- 2022
-
Ingår i: eceee 2022 Summer Study on energy efficiency. - : European Council for an Energy Efficient Economy (ECEEE). - 9789198827002 ; , s. 559-569
-
Konferensbidrag (refereegranskat)abstract
- The Energy Performance Certificate (EPC) is an important information tool to improve the energy performance (EP) of buildings. However, establishing the EP of building is tedious, time-consuming, and numerous input parameters are required in its estimation. However, the usefulness of EPC for the implementation of customized solutions by the supply-side actors require that EPCs are available for all buildings, easily accessible, credible, and recent. However, this is not the case at present. This could be addressed by employing remote sensing dataset along with GIS based spatial analysis techniques. In the present study, the spatial regression analysis technique is implemented in identifying the spatial relation between the input variables and the EP of selected 4541 buildings within Växjö municipality, Sweden.The input variables used in the study include the land surface temperature (LST) maps of summer and spring of 2020 derived through the thermal band of Landsat 8 satellite data, built-up and openland neighbourhood maps prepared from the land use/land cover map 2020 of the study region. Building topology including year of construction, type, category, and complexity of buildings are also used to identify the relation between the input variables and the EP of those selected buildings. Results of spatial regression analysis reveal a significant positive relation between the LST and EP of buildings (regression co-efficient are 0.86 and 0.95 in spring and summer respectively).The stronger correlation in summer could be because of the availability of higher intensity of solar radiation which gets absorbed by the built-up regions. Results suggest that the LST maps derived from satellite imageries could provide information on the EP of buildings. This could be beneficial to local decision makers and policy regulators in identifying the buildings with lower EP with better accuracy with less dependence on EPC data which are sometimes not available or not updated. The results could also be beneficial to investment bankers, real estate companies during the purchase and sale of a building. Policy makers and renovation companies could get benefited with the results in preliminary identification of the potential hotspots for district energy renovation where the EP of buildings is poorer. This could help achieve the goal of sustainable urban planning targeting energy reduction, climate adaptation, through implementation of effective energy management strategies in the building sector.
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| 12. |
- Mahapatra, Krushna, Professor, 1974-, et al.
(författare)
-
Recycling Behavior in a Multicultural Urban Area in Sweden
- 2021
-
Ingår i: International Journal of Environmental and Ecological Engineering. - : World Academy of Science, Engineering and Technology. - 1307-6892. ; 15:8, s. 221-225
-
Tidskriftsartikel (refereegranskat)abstract
- Alabastern, a multicultural rental housing area in the Växjö city of Sweden, was identified as poor at recycling household waste compared to other housing areas in the town. In this paper, a qualitative and quantitative analysis is conducted to understand the underlying causes of waste recycling behavior of the tenants. Results showed that majority of the studied participants perceived themselves to be environmentally friendly. They reported that they recycled household waste quite often, but it was the other tenants who did not sort their waste properly. The respondents identified the causes of the improper waste recycling as lack of attitude and awareness, limitation of communication, sense of insecurity, lack of means to transport bulky waste, limitation of the recycling room, and inadequate action by the housing company Vï¿œxjï¿œbostï¿œder.
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| 13. |
- Mainali, Brijesh, Dr, 1972-, et al.
(författare)
-
One-Stop-Shop for Energy Renovation : Examples of Local Interventions in Residential Sector in Achieving SDG 7.3
- 2020
-
Ingår i: IESD Second Annual Conference: Aligning Local Interventions with the UN SDGs, 2nd July.
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- This paper presents the challenges and possibilities in the journey of establishing One-Stop-Shop (OSS) for energy renovation with three case examples. The paper compares three models; municipality owned (Cyprus), private and public-private partnership with operational support from municipalities (Netherlands), and privately owned and market based (Sweden) OSS models. The study is based on the situational analysis with market gap identification for the energy renovation of the dwellings and CANVAS analysis of the studied OSS models. The commonalities and peculiarities of different OSS models have been closely observed and the strength and weaknesses within these models are critically discussed. The analysis have shown that lack of awareness, inconvenience and cumbersome renovation process and lack of access to finance are the common challenges of energy renovation market. The study has also shown that the OSS model and its setting up journey may vary depending upon the market conditions, readiness, existing level of government support, and nature of the organization willing to initiate the OSS.
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| 14. |
- Mainali, Brijesh, Dr, 1972-, et al.
(författare)
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Strategies for deep renovation market of detached houses
- 2021
-
Ingår i: Renewable & sustainable energy reviews. - : Elsevier. - 1364-0321 .- 1879-0690. ; 138, s. 1-10
-
Tidskriftsartikel (refereegranskat)abstract
- Deep renovation of the buildings is a key for sustainable development, however, the rate of deep renovation of residential buildings in the European Union (EU) is lower than what is required to meet the climate and energy goals. This paper analyses peculiarities and commonalities in market conditions and approaches to the deep renovation of single-family (or detached) houses in Denmark and Sweden. The market analysis covers the Political, Economic, Social, and Technical (PEST) dimensions and is based on systematic literature review and findings of market gap analysis. The PEST analysis is complemented with responses from 49 stakeholders/experts to examine the strengths, weaknesses, opportunities, and threats (SWOT analysis) for the deep renovation market. The synthesis of SWOT and PEST led to some strategies for deep renovation. Furthermore, policies and strategies adopted by some other countries have been discussed to place findings from this study in the regional and global context. Capacity building in designing and managing deep renovation with technological advancement and construction practices; and enforcement of quality assurance systems of artisans could avoid the perceived risk, and inconveniences associated with renovation. Encouraging systematically planned stepwise deep renovation through One-Stop shop and linking such renovation with appropriate financing mechanism could attract more homeowners with financial limitations. Besides, clustering several houses in need of renovation and appropriate energy/carbon pricing mechanisms could make the renovation market more attractive for investors and construction companies. The findings of this paper are of interest to construction companies, policymakers, investors, and analysts about the deep renovation market.
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| 15. |
- Mokhtara, Charafeddine, 1992-, et al.
(författare)
-
Urban Heat Island Risk Assessment and Mapping in the Swedish Residential Sector
- 2023
-
Ingår i: Proceedings of the International Conference “Sustainable Built Environment and Urban Transition” / Climate change, resilience, and adaptation of urban built environment. - : Linnaeus University Press. - 9789180820424
-
Konferensbidrag (refereegranskat)abstract
- Although Scandinavian countries, including Sweden, are relatively less vulnerable to climate change, Swedish residential dwellings specifically those constructed before the 1975s are likely to be impacted by current extreme weather events (EWE) such as urban heat islands (UHI). This EWE can worsen air quality, increase heat-related illnesses (particularly among vulnerable populations), and raise maintenance costs and energy demand for cooling in buildings.This study aimed to map UHI risk in Sweden's residential sector using a scenario-based analysis approach. Moderate Resolution Imaging Spectroradiometer (MODIS) Remote sensing (RS) imagery data (land surface temperature (LST)) and some statistical data (including the number of houses, building typologies, and characteristics) collected from the SCB (Statistics Sweden) and TABULA database are used. The overall UHI risk maps for Sweden are developed following the risk matrix approach, by weighting and aggregating the created maps for UHI hazard, building exposure, and vulnerability. Here, the geographical information system ArcGIS pro 3.1 was used to carry out the different spatial analysis tasks, including pre-processing of spatial data, developing required maps, and performing raster calculations.The outcomes reveal a range of areas posing risks, with most high-risk zones situated in the southern and southeastern regions. Moreover, there is a discernible impact of the UHI on most of the buildings across Sweden constructed prior to the 1960s. Nevertheless, for structures built between 1961 to 1975, only those in the southern regions display potential susceptibility to the UHI. Furthermore, the western areas exhibit a low UHI risk.Despite the limitation of data used, the findings of this study have practical implications, as they can help homeowners, renovation companies, and policymakers implement appropriate adaptation strategies. The approach used is comprehensive, easily applicable, scalable, and can be replicated anywhere, assisting in the development of climate-resilient buildings not only in Sweden but also in other regions.
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| 16. |
- Nafisi, Amin, et al.
(författare)
-
Economic and emission analysis of running emergency generators in the presence of demand response programs
- 2022
-
Ingår i: Energy. - : Elsevier. - 0360-5442 .- 1873-6785. ; 255
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Tidskriftsartikel (refereegranskat)abstract
- Industrial plants in Iran, similar to many other developing countries, use diesel or natural gas generators mainly as backup power during a grid outage. Depending on the electricity network configuration, these emergency generators might be able to deliver electricity to the grid and thereby contribute to demand response (DR) programs. Hence, Iran's Ministry of Energy (MOE) has policies and incentives to promote the use of emergency generators during peak hours. This paper investigates the economic and carbon dioxide emission implications of such DR policies by the MOE. Results show that the current policy promotes diesel generators that are economically beneficial to the companies but are more carbon intensive than the natural gas generators. To mitigate the climate change with a minimum impact on the economic interest of the companies, the future DR policies can be amended. The revised incentive structure proposed by this study is simple but effective and ensures that the lower carbon emitting natural gas generators would become more economically attractive than diesel generators. Following the proposed approach to set the incentives, the natural gas generators would be more beneficial according to the MOE policy in 2019 if the difference between the diesel incentive and natural gas incentive was less than 711 Rial.
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| 17. |
- Pardalis, Georgios, 1983-, et al.
(författare)
-
A business model canvas framework for sustainable one-stop-shops
- 2022
-
Konferensbidrag (refereegranskat)abstract
- The Sustainable Business Model Canvas (SBMC) offers a useful tool for business model design, as it manages to integrate all three dimensions of sustainability without distinguishing between three different layers (economic, environmental, and social). This paper presents the application of SBMC in a real study case of a one-stop-shop (OSS) for the renovation of single-family houses operating inKronoberg province in Sweden. The case is based on shifting from the current approach of the OSS, making interventions that will lead to the development of a "new" OSS which can reach the highest possible sustainability potential. A two-stage comprehensive assessment process for the "new" model is proposed, following a lifecycle perspective. The use of SBMC and the assessment process allows both existing and under-development OSSs to gain a better understanding of different alternatives regarding their business, and how these alternatives improve or weaken their existing business model. This work also proposes the steps that should be followed to assess the impact of potential intervention in the business model on the sustainability performance of an OSS. There is a need though to acquire relevant data to make a more detailed evaluation of the economic, environmental, and social burdens and benefits of an OSS. Such an evaluation will lead to more well-informed interpretations regarding the sustainability performance of different OSSs.
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| 18. |
- Pardalis, Georgios, 1983-, et al.
(författare)
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A triple-layered one-stop-shop business model canvas for sustainable house renovations
- 2020
-
Ingår i: WSBE 20 - World Sustainable Built Environment. - Bristol, United Kingdom : IOP Publishing.
-
Konferensbidrag (refereegranskat)abstract
- Triple Layer Business Model Canvas (TLBMC) is a tool helping us to explore sustainability-oriented business model innovation. It extends the business dimension of the canvas with the addition of an environmental dimension based on life cycle perspective and a social dimension based on stakeholder perspective. A combined consideration of the three dimensions of the business model allows us to understand how an organization generates economic, environmental and social values. This paper presents the TLBMC of One-Stop- Shop (OSS) business model for energy renovation of detached houses. This three-layer canvas allows us to under- stand how OSS creates different types of values related to energy renovation, by using elements of life-cycle analysis and stakeholder management. It also contributes to the identification of gaps in research on energy renovation of detached houses, which need to be filled in order to better quantify the benefits of energy efficient renovation in those dwellings and develop such an OSS that will serve better the growing needs of the urban environments of the future.
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| 19. |
- Pardalis, Georgios, 1983-, et al.
(författare)
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Comparing public- and private-driven one-stop-shops for energy renovations of residential buildings in Europe
- 2022
-
Ingår i: Journal of Cleaner Production. - : Elsevier. - 0959-6526 .- 1879-1786. ; 365
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Tidskriftsartikel (refereegranskat)abstract
- Energy efficiency in buildings remains an important priority for the European Union. Towards that direction, the role of the one-stop-shops (OSSs) that will offer integrated renovation services has been further enhanced. The paper aims to compare public and private-driven OSSs to increase knowledge regarding the way they operate. The business models of ten OSSs for the renovation of residential buildings, operating in six European countries have been analyzed, and further evaluated for their engagement in the critical moments of the renovation customer journey. Findings show that the majority of examined OSSs have managed to reach some level of standardization in the way they deliver their service. Additionally, the examined OSSs appear to be engaged in the critical moment of the renovation customer journey, which can attract the interest of potential customers. Public-driven OSS appears to operate smoother in the renovation market and offer services that are considered crucial for their potential customers. Their viability though in the absence of public funding needs to be further examined. On the other hand, private-driven OSSs are called to deal with greater challenges in their effort to consolidate their presence in the renovation market. Providing access to financing remains a challenge for private-driven OSSs, which to attract more customers resort to value additions to their service, which might affect their viability. The study provides valuable information and insights about OSSs in operation that could be useful to stakeholders that are active in the renovation market or interested to enter it
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| 20. |
- Pardalis, Georgios, 1983-, et al.
(författare)
-
Future Energy-Related House Renovations in Sweden : One-Stop-Shop as a Shortcut to the Decision-Making Journey
- 2021. - 1
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Ingår i: Emerging Research in Sustainable Energy and Buildings for a Low-Carbon Future. - Singapore : Springer. - 9789811587757 ; , s. 37-52
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Bokkapitel (refereegranskat)abstract
- Based on an online survey, this paper analyzes the attitude of detached house owners in Sweden toward future renovations and their perception over a one-stop-shop (OSS) service for deep renovation of these dwellings. With the aid of a house owners’ renovation decision-making journey for renovation, personal and contextual variables have been analyzed to identify those house owners having renovation plans in the near future, what they are going to renovate, and which needs to lead them to that decision. Furthermore, we examine if there is an interest in OSS concept and the factors affecting positively or negatively the choice for such a concept. Results suggest that deep renovation is not yet prioritized. The priority for house owners is to change specific components of their dwelling and follow a step-wise approach. Aesthetic renovations are high on the agenda, with some structural and energy-related renovations following them. House owners between 29 and 49 years of age are those mostly interested in more comprehensive renovations. The OSS concept appears to be interesting to a number of house owners capable to verify a business potential. House owners up to the age of 45 years, with dwellings built from 1960 and above and with environmental awareness, are the market segment that can act as early adopters of the OSS concept. When it comes to the decision-making journey for renovations, house owners’ future plans, and the factors affecting their choice for an OSS provider, we can claim that OSS can act as a guide for house owners from the early stages of their decision-making journey and provide them with a shortcut that will make this journey more secure, while triggering renovation decision of greater extent. In terms of financing, incentives related to energy performance are also suggested as means that could boost greater interest for more comprehensive renovations.
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| 21. |
- Pardalis, Georgios, 1983-, et al.
(författare)
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Public versus private one-stop-shops for energy renovations of residential buildings in the EU
- 2021
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Ingår i: eceee 2021 Summer Study on Energy Efficiency. - : European Council for an Energy Efficient Economy (ECEEE). - 9789198387889 ; , s. 585-594
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Konferensbidrag (refereegranskat)abstract
- The current rate of residential building renovations in Europe is inadequate and attributable to the lack of integrated solutions in the market supported by appropriate business models. One-stop-shop (OSS) offers an innovative business approach, and it is acknowledged by the European Commission, in the Directive 2018/844/EU, as a transparent advisory and facilitating tool for the establishment of services relevant to energy efficiency renovations for buildings. This paper evaluates two different delivery mechanisms of OSS, namely public-driven and private-driven, using six examples of OSSs business models currently operating in five European countries. The study is based on document and records-based research, and the analysis of data is done through a standardized blank profile for each OSS including parameters based on the deliberations of Osterwalder and Pigneur's business model canvas.A comparative analysis of the models has been conducted to identify repetitive patterns, commonalities, and differences between them. The study has shown that the examined OSSs are still in a developing stage, struggling to achieve enough scale, which indicates the need to lower their costs, reorganize their models and streamline the value chain to become attractive to their targeted customer segments. Public-driven OSSs appear to be, for the nonce, better positioned in the market and their reliance on public money allows them to achieve some expansion of their activities, even if this cannot be considered a sustainable business solution in the long run. Private-driven OSSs need to work harder to strengthen their position in the market and increase their attractivity. Towards that direction, the contribution of policy interventions and re-adjustment of existing financing mechanisms could be further examined.
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| 22. |
- Pardalis, Georgios, 1983-, et al.
(författare)
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Swedish construction MSEs : simply renovators or renovation service innovators?
- 2020
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Ingår i: Building Research & Information. - : Taylor & Francis. - 0961-3218 .- 1466-4321. ; 48:1, s. 67-83
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Tidskriftsartikel (refereegranskat)abstract
- To address the renovation needs of detached house stock in Sweden, micro and small-sized enterprises (MSEs), a subgroup of small and medium-sized enterprises, are expected to introduce more comprehensive house renovation solutions. One-stop-shop (OSS) is an innovative Product-Service System model that can enable MSEs to offer comprehensive renovation packages instead of existing fragmented solutions. We have applied a conceptual framework for innovation adoption in organizations and conducted an interview of 21 construction MSEs in three different geographical areas in Sweden to examine their perceptions and preparedness to adopt the OSS business concept. Findings showed that the examined MSEs are positive towards OSS as it could address the needs for the comprehensive renovation of detached houses. However, presently, are not prepared to take the coordinator’s role in such a concept mainly due to the perceived business risks, the lack of flexibility to organizational restructuring, and lack of resources and management competency to coordinate multiple tasks and actors. Those organizations lacked awareness of existing policy support and access to funding mechanisms to try new business models. As a solution, they proposed an external coordinator to be the provider of OSS, on the trial phase, whose role and characteristics need to be further examined.
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| 23. |
- Réfabert, Françoise, et al.
(författare)
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How to boost one-stop-shops for integrated home energy renovation in the EU?
- 2021
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Ingår i: eceee Summer Study on Energy Efficiency. - : European Council for an Energy Efficient Economy (ECEEE). - 9789198387889 ; , s. 827-835
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Konferensbidrag (refereegranskat)abstract
- A municipal housing company in the south of Sweden constructed three energy efficient multi-family apartment buildings in 2020 in which smart technologies were implemented. One of the buildings with a total heated area of 976 m2 is designed to have a primary energy number of 19.3 kWh/ m2 /year compared to the 85 kWh/m2/year as required by the Swedish Building Regulations. Apart from building envelope energy efficiency measures solar panels were installed and the excess electricity produced is stored to a battery. The excess heat from the solar panels is used in the bedrock heating system with cooling possibilities. The aim of this energy solution is to make the buildings partially off-grid. The actual electricity produced from the solar hybrid panels is so far lower than the simulated self-consumption and the battery is not used to its full potential. The rainwater collected was enough to save 75 percent of drinking water volume normally used for toilet flushing according to calculations made from incomplete data. A faulty installed meter, a fire incident, the use of several different systems and companies for collecting and logging data, and many other contributing factors affecting the possibility to evaluate the installed smart energy systems needs to be remediated. A recommendation is to assign someone the role of energy coordinator with the purpose of making evaluation possible within one year.
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| 24. |
- Sinha, Shashwat, et al.
(författare)
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Integrating Digital Tools in One-Stop-Shop Business Models for Climate-Smart Single-Family Home Renovation in the European Union
- 2023
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Ingår i: Proceedings of the International Conference “Sustainable Built Environment and Urban Transition”. - Växjö, Sweden : Linnaeus University Press. - 9789180820424
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Konferensbidrag (refereegranskat)abstract
- The ageing building stock in the European Union (EU) is not adequately equipped to deal with the changing climate, posing a significant challenge for climate change mitigation and adaptation. This has driven governmental institutions and private firms to expedite their renovation efforts; integration of one-stop-shop (OSS) regimes for encouraging higher rates of renovation could stimulate the rate of renovation by up to 6% annually, the aimed rate for the 2030 Renovation Wave by the European Commission. While OSS solutions present a great opportunity for addressing the challenges posed by climate change by allowing older homes to become better prepared through climate-smart retrofitting, these solutions have had mixed results in the past. Given the urgency of the situation as predicted in various scenarios by the IPCC, it is imperative to assess the effectiveness of OSS solutions in accelerating the rate of renovation. This research aims to investigate how the digitalisation of aspects of the customer journey of an end user participating in an OSS home renovation platform can lead to overcoming challenges faced by previously implemented instances of it. To answer this question, first a systematic literature review of previous OSS schemes implemented in Europe, digital tools commonly applied for renovation, and state-of-the-art strategies and models to facilitate customer journeys were studied. Through the characterisation of these mechanisms, opportunities for the integration of digital tools were identified and suggested for each stage of the customer journey. It was found that through the utilisation of technologies such as application programming interfaces (API), for increased access and real-time updating; blockchain infrastructure for information transparency and symmetry, and urban building energy modelling for predictive assessment, some important pitfalls of OSS implementation can be addressed. This study is expected to contribute to the renovation sector, ultimately leading to improving buildings' adaptive capacity, which is critical for the EU's sustainable development objectives going forward.
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| 25. |
- Sula, Migena, 1986-, et al.
(författare)
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Additional Dwelling Units : Can they finance energy renovation?
- 2022
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Ingår i: eceee 2022 Summer Study on energy efficiency: agents of change, European Council for an Energy Efficient Economy (ECEEE), 2022. - : European Council for an Energy Efficient Economy (ECEEE). - 9789198827002 - 9789198827019 ; , s. 1295-1306
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Konferensbidrag (refereegranskat)abstract
- In Northern Europe, Single Family Housings (SFH) constitute a large share of the total building stock. In Sweden, more than 52% of the population lives in SFH. Most of these houses were built between 1960-80 and are currently needing renovation. Most of these houses are owned by older adults whose kids have moved away, and thus they live in housing over-dimensioned to their needs with a large share of energy consumption for space heating. Furthermore, these facilities are neither elderly-friendly nor energy-efficient, deeming major renovation. This paper applies a case-study approach to explore options to better utilize and reduce the living area per capita through the generation of Additional Dwellings Unit (ADU) within the existing building stock owned by the elderly. The case study SFH owned by an elderly couple is located in Kronoberg Region, Sweden, and is a typical SFH built during the 1970s. We redesign and restructure the underused space to create an ADU that can be rented out, which in turn may economize the high investment costs of energy-efficient renovation. The energy efficiency renovation measures considered were improvement of the building's climate shell (envelope), extra insulation in the walls and attic, and better performance doors and windows. Energy simulations and life cycle cost assessment of the energy efficiency measures, and space redesign showed that it is possible to reduce energy use by 61% compared to the existing condition of the reference house and a payback time of 59% compared to the application of the energy measures alone. The proposed intervention is aligned with the aging in place strategy, tackling it from a space sufficiency perspective. The proposed intervention reduces the living space per resident by 40% and energy consumption per capita by 62% compared to just the energy renovation of the reference house while creating cash inflows that motivate the houseowner to uptake an energy renovation. The improved energy performance of the building may generate better indoor living conditions for a healthier life for the residents.
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| 26. |
- Sula, Migena, 1986-, et al.
(författare)
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Addressing housing shortage through energy and space-efficient retrofitting : The case study of a Swedish Single-Family house
- 2022
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Ingår i: IOP Conference Series: Earth and Environmental Science. - Bristol, United Kingdom : Institute of Physics Publishing (IOPP).
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Konferensbidrag (refereegranskat)abstract
- Sweden's shortage of affordable housing has been evolving into a major in recent years. A 2021 report by the Swedish National Board of Housing, Building, and Planning (Boverket) stated a need for 60,000 new homes by 2030. In addition, the Swedish building stock is responsible for 39% of the country's total energy consumption and 21% of its greenhouse gas emissions. Therefore, solutions to address the housing crisis should go hand in hand with the need for increased building retrofits to meet Sweden's 2045 energy and climate targets. In this context, re-densification of the existing building stock is a possible option. This study examines possible space- and energy-efficient options for densifying the housing supply in Sweden's existing single-family home (SFH) segment. Using a case study in Kronoberg, Sweden, occupied by an elderly household, options for converting the unused space into new additional dwelling units (ADUs) and reducing per capita living space are explored. Most SFHs in Sweden are old, in poor condition, and in urgent need of structural and energy retrofits. In addition, about one-third of homeowners are over 60 years old and report living in homes that are too large compared to their needs - an excellent environment to study the proposed intervention. Revenues from renting the newly created ADUs suggest that the proposal is financially attractive because it capitalizes on the high initial investment costs of energy retrofits. In addition, spatial interventions combined with energy-efficient measures result in a 40 percent lower energy use and environmental impact per capita compared to energy retrofits alone due to a reduction in per capita living space. Finally, the study aims to initiate a discussion on sufficiency, innovative energy regulations, and housing policy tools needed to transition to the low-energy single-family housing stock
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| 27. |
- Sula, Migena, 1986-, et al.
(författare)
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Barriers and drivers for scaling-up energy renovations
- 2021
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Ingår i: eceee 2021 Summer Study on Energy Efficiency. - : European Council for an Energy Efficient Economy (ECEEE). - 9789198387889 ; , s. 637-647
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Konferensbidrag (refereegranskat)abstract
- Deep energy renovation (DER) of the existing building stock is a key challenge to fulfill the European Union (EU) target of energy efficiency improvement of at least 32.5% by 2030. However, the depth and rate of current energy renovation are far below in achieving this goal. Energy efficiency renovation needs to go beyond the individual building perspective by introducing strategic larger-scale renovation approaches for investment optimization. Yet, due to several hindrances, a slow implementation pace is observed. Therefore, this study identifies the challenges of scaling up retrofitting initiatives from a single-building approach to stock-based analysis. A systematic synthesis method (scoping, systematic review, and meta-analysis of the results) is applied in this paper. Scientific articles collected from SCOPUS and Web of Science together with case study reports assessed through the EU project database have been analyzed within this research. The research discusses the publications available from three main aspects, motivation to initiate large-scale renovation initiatives and drivers & barriers influencing the entire renovation process in the context of the EU environment. It is observed that the district scale represents a more complex model to be analyzed, calculated, assessed, and managed compared with single buildings. Still, it provides a much better offer regarding renewable energy technology applications, financial viability, smart and innovative design tools. Different technical, social, and economic-related factors could be identified that need to be addressed adequately to initiate the "European Renovation Wave." This review, therefore, advocates the need for a holistic consideration of the entire process, based on which to structure further disciplinary developments. Research gaps are highlighted, and new directions for future research are suggested.
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