| 1. |
- Pardalis, Georgios, 1983-, et al.
(författare)
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Kundresa för One-Stop-Shop
- 2022
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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)
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Evaluation of increased electricity production when cooling solar panels
- 2022
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Ingår i: SBE22Delft - Innovations for the Urban Energy Transition. - Bristol, United Kingdom : Institute of Physics (IOP).
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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)
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Evaluation of smart energy solutions in a multifamily apartment building in Småland, Sweden
- 2021
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Ingår i: eceee Summer Study on Energy Efficiency. - : European Council for an Energy Efficient Economy (ECEEE). - 9789198387889 ; , s. 999-104
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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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| 4. |
- Sula, Migena, 1986-, et al.
(författare)
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Adopting Space Sufficiency Interventions as a Means for Accelerating Energy Renovation : Swedish Homeowners’ Perspective
- 2023
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Ingår i: Proceedings of the International Conference “Sustainable Built Environment and Urban Transition”. - : Linnaeus University Press. - 9789180820424
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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. |
- Aabrekk, S., et al.
(författare)
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Deliverable 2.2 Possible market strategies for one stop shops of renovation of single family house. : Report prepared for Nordic Innovation Centre
- 2012
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- The document describes examples of missions, visions and strategies based on the potentialpiloting models defined in report 3.2. It is based on status of interest amongst thestakeholders, and the information, figures and challenges which were discussed in the reportD 2.1 Stakeholder interests. The different service models will request different missionsdepending on the stakeholder in charge of the model. Also visions and strategies could bedifferent depending on the composition of services (core business) offered within each pilot aswell as the additional services offered by sub suppliers and the network connected to the pilot.In the report D2.1 Stakeholders interests, the following 5 different piloting models aresuggested:Type 1 Joint venture of industry, retailers and contractorsType 2 Joint venture of construction/renovation, industry and architect/engineering companiesType 3 Complementary businesses expand their business into renovationType 4 Joint venture of type house producer, bank and home owner associationType 5 Energy/building consultant, real estate agent and financing institutions, e.g. bankIn this report we have described mission, vision and market strategies for 4 existing orproposed models; The Project Manager by Bolig Enøk, from Norway (type 1), ENRA concept(type 2) and K-Rauta & Rautia (type 3) from Finland, and ProjectLavenergi (type 2) fromDenmark. Cleantech by Dong Energy (type 3) from Denmark is also addressed, but notdescribed in detail. As there is no concrete examples representing two of the models fromD2.1 (types 4 and 5), we have made a theoretical exercise in developing mission, vision andmarket strategies for type 5 model, while type 4 is not handled.It may be concluded that there are commercial actors in different parts of the value chainwhich see an opportunity in developing different approaches of “one stop shops” for energyefficient holistic renovations. The concepts are still in a development phase and differ inrespect to how they are organised (as supply side). We may say that the pilots in the differentcountries also find inspiration from each other through this research project. Due to thecomplexity of a holistic renovation project, it is a prerequisite with good partnerships even inthe development phase. In all identified models there is however one main actor taking thelead and ownership to the business model.Independent of the business model the responsible company needs to make some strategicchoices. The starting point is the SWOT analysis which sums up all major challenges for therespective business model. How the strategies should be developed is described in this report.Although the main target group for this report is companies seeing an interest in developingbusiness models for renovation, we found some important issues identified in the SWOTanalysis which the authorities may influence including lack of interest in the market (need ofmore public attention through holistic campaigns), fragmented solutions (stop subsidisingsingle measures without a holistic plan), serious vs unserious companies (need of certificationsystems to build credibility), cost focus leads to limited renovation (need of subventionschemes for holistic retrofitting including tax deduction measures) and finally lack incompetence within companies (need of support to training and collaboration acrosscompanies).
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| 6. |
- Aarthi, Aishwarya Devendran, et al.
(författare)
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Implementation of GIS-AHP Framework for the Identification of Potential Landfill Sites in Bengaluru Metropolitan Region, India
- 2023
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Ingår i: The 9th International Conference on Energy and Environment Research. ICEER 2022.. - : Springer. - 9783031435584 - 9783031435591
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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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| 7. |
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| 8. |
- Almeida, Roma, 1982-, et al.
(författare)
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Analytical review of methodological approaches for measuring circularity in building renovation
- 2023
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Ingår i: Proceedings of the International Conference “Sustainable Built Environment and Urban Transition”. - Växjö : Linnaeus University Press. - 9789180820424
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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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| 9. |
- Bonakdar, Farshid, 1977-, et al.
(författare)
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The Implications of Climate Zones on the Cost-Optimal Level and Cost-Effectiveness of Building Envelope Energy Renovation and Space Heat Demand Reduction
- 2017
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Ingår i: Buildings. - : MDPI AG. - 2075-5309. ; 7:2
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Tidskriftsartikel (refereegranskat)abstract
- The cost-optimal level of energy performance for buildings shall be identified according to the European directive of 2010. The Swedish building stock needs comprehensive knowledge and an overall strategy for the cost-optimal level of renovation. This paper studies the contribution of Swedish climate zones to the cost-optimal level of renovation on a multi-story residential building in Sweden from the building owner perspective. The building space heat demand is simulated for four Swedish climate zones. The net present profit (NPP) method is defined and used in this study in order to analyze the cost-optimal level and the cost-effective renovation of building envelope components (e.g., attic floor, basement walls, exterior walls and windows). The implication of different discount rates is studied, as well. The results show that the optimum renovation of the building envelope offers 51% more energy savings for space heating when the building is in a northern climate zone compared to a southern zone. The study suggests that different renovation strategies for the building stock renovation need to be identified, separately, for each climate zone. The NPP analysis identifies the minimum required investment and maximum achievable energy savings that are needed to have a cost-effective renovation. The broad range of studied climate zones provides the opportunity to apply the obtained results to other climate zones by either interpolation or extrapolation of NPPs for the buildings with similar characteristics.
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| 10. |
- Bravo, Giangiacomo, et al.
(författare)
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Physical vs. Aesthetic Renovations : Learning from Swedish House Owners
- 2019
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Ingår i: Buildings. - : MDPI. - 2075-5309. ; 9:1
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, we identify the socio-economic attributes and attitudes that have influencedhouse owners in renovating their homes in the past. Our study is based on responses to an onlinequestionnaire survey of 971 house owners living in Kronoberg County in Sweden. Results showedthat the interest and willingness of the house owners to perform a renovation varied dependingon their demographic background and the age of the house. The latter positively affected pastrenovations, only when combined with the residence time. Furthermore, the age of house ownersstrongly and positively affected the probability of performing aesthetic type of renovations, becauseof a long time of residence in the house. Younger, town living, and highly educated house ownersseem to be more concerned regarding saving energy, which motivated them to perform physicalrenovations on their house. Our results also suggest that income, level of education, and place ofresidence have an effect on renovation decisions only through their effect on the energy concern ofhouse owners, and a varied effect on renovation decisions, when combined with the time of residencein the house.
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