The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Jorgen Rose - One of the best experts on this subject based on the ideXlab platform.
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Energy consumption in an old residential building before and after deep Energy Renovation
Energy Procedia, 2015Co-Authors: Kirsten Engelund Thomsen, Jorgen Rose, Ove Morck, Soren Ostergaard Jensen, Iben OstergaardAbstract:Abstract Denmark is participating in IEA EBC Annex 56 “Cost Effective Energy and Carbon Emissions Optimization in Building Renovation”. The housing complex Traneparken has been chosen as a Danish case study for the project. It has been retrofitted with new facades, new windows, additional insulation, mechanical ventilation with heat recovery and a photo-voltaic installation on the roof. The measured Energy consumption for heating and domestic hot water before and after Renovation was 736 MWh/year and 506 MWh/year respectively. Hereby, the project has demonstrated that the Renovation resulted in significant Energy savings.This paper presents results from the Danish case study.
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Energy Renovation of single family houses in denmark utilising long term financing based on equity
Applied Energy, 2011Co-Authors: Jesper Kragh, Jorgen RoseAbstract:Abstract This paper aims to present an economic overview of the opportunities for Energy Renovation of single-family houses in Denmark financed over the long term. The paper focuses on the economic difference between Energy savings and the repayment of investment. Taking out the average remaining 20% equity in long-term property mortgage loans and utilising it for extensive Energy Renovation improves both the economy and the extent of included measures. Approximately 30% of Energy consumption in Denmark is used for space heating. The existing 1 million single-family houses account for approximately half of this, thus making Energy Renovation a key factor for the reduction of CO2 emissions. The conclusions were that in average the possible budget for Renovation varied between €20,000 and 40,000 per single-family house. The equity of the house was particularly dependant on geographical location and construction period. Different Energy Renovation measures were analysed in terms of economy showing that a wide range of specific measures had a positive economic balance for the homeowner from year 1. The economic balance between saved Energy and repayment of the investment is however very dependent on the assumed future Energy price. An example showed that a typical house from 1925, still in its original form, could yield annual savings for the homeowner of approximately €2600, assuming a future Energy price of 0.2 €/kW h. At the current Energy price level of 0.1 €/kW h Energy Renovation in general is almost economically neutral for the homeowner.
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Energy Renovation of single family houses in denmark utilising long term financing based on equity
Applied Energy, 2011Co-Authors: Jesper Kragh, Jorgen RoseAbstract:This paper aims to present an economic overview of the opportunities for Energy Renovation of single-family houses in Denmark financed over the long term. The paper focuses on the economic difference between Energy savings and the repayment of investment. Taking out the average remaining 20% equity in long-term property mortgage loans and utilising it for extensive Energy Renovation improves both the economy and the extent of included measures. Approximately 30% of Energy consumption in Denmark is used for space heating. The existing 1 million single-family houses account for approximately half of this, thus making Energy Renovation a key factor for the reduction of CO2 emissions. The conclusions were that in average the possible budget for Renovation varied between [euro]20,000 and 40,000 per single-family house. The equity of the house was particularly dependant on geographical location and construction period. Different Energy Renovation measures were analysed in terms of economy showing that a wide range of specific measures had a positive economic balance for the homeowner from year 1. The economic balance between saved Energy and repayment of the investment is however very dependent on the assumed future Energy price. An example showed that a typical house from 1925, still in its original form, could yield annual savings for the homeowner of approximately [euro]2600, assuming a future Energy price of 0.2 [euro]/kWÂ h. At the current Energy price level of 0.1 [euro]/kWÂ h Energy Renovation in general is almost economically neutral for the homeowner.
Marcus Gustafsson - One of the best experts on this subject based on the ideXlab platform.
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life cycle cost of building Energy Renovation measures considering future Energy production scenarios
Energies, 2019Co-Authors: Moa Swing Gustafsson, Jonn Are Myhren, Erik Dotzauer, Marcus GustafssonAbstract:A common way of calculating the life cycle cost (LCC) of building Renovation measures is to approach it from the building side, where the Energy system is considered by calculating the savings in the form of less bought Energy. In this study a wider perspective is introduced. The LCC for three different Energy Renovation measures, mechanical ventilation with heat recovery and two different heat pump systems, are compared to a reference case, a building connected to the district heating system. The Energy system supplying the building is assumed to be 100% renewable, where eight different future scenarios are considered. The LCC is calculated as the total cost for the Renovation measures and the Energy systems. All Renovation measures result in a lower district heating demand, at the expense of an increased electricity demand. All Renovation measures also result in an increased LCC, compared to the reference building. When aiming for a transformation towards a 100% renewable system in the future, this study shows the importance of having a system perspective, and also taking possible future production scenarios into consideration when evaluating building Renovation measures that are carried out today, but will last for several years, in which the Energy production system, hopefully, will change.
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economic and environmental analysis of Energy Renovation packages for european office buildings
Energy and Buildings, 2017Co-Authors: Marcus Gustafsson, Chris Bales, Chiara Dipasquale, Stefano Poppi, Alessandro Bellini, Roberto Fedrizzi, Fabian Ochs, Marion SieAbstract:A large share of the buildings in Europe are old and in need of Renovation, both in terms of functional repairs and Energy efficiency. While many studies have addressed Energy Renovation of buildin ...
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techno economic analysis of Energy Renovation measures for a district heated multi family house
Applied Energy, 2016Co-Authors: Marcus Gustafsson, Moa Swing Gustafsson, Jonn Are Myhren, Chris Bales, Sture HolmbergAbstract:Renovation of existing buildings is important in the work toward increased Energy efficiency and reduced environmental impact. The present paper treats Energy Renovation measures for a Swedish district heated multi-family house, evaluated through dynamic simulation. Insulation of roof and facade, better insulating windows and flow-reducing water taps, in combination with different HVAC systems for recovery of heat from exhaust air, were assessed in terms of life cycle cost, discounted payback period, primary Energy consumption, CO2 emissions and non-renewable Energy consumption. The HVAC systems were based on the existing district heating substation and included mechanical ventilation with heat recovery and different configurations of exhaust air heat pump.
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techno economic analysis of Energy Renovation measures for a district heated multi family house
Applied Energy, 2016Co-Authors: Marcus Gustafsson, Jonn Are Myhren, Chris Bales, Moa Gustafsson, Sture HolmbergAbstract:Renovation of existing buildings is important in the work toward increased Energy efficiency and reduced environmental impact. The present paper treats Energy Renovation measures for a Swedish dist ...
Manuela Guedes De ,almeida - One of the best experts on this subject based on the ideXlab platform.
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Environmental and cost life cycle analysis of the impact of using solar systems in Energy Renovation of Southern European single-family buildings
'Elsevier BV', 2022Co-Authors: Mateus Ricardo, Silva S. M., Manuela Guedes De ,almeidaAbstract:Nowadays, in the European Union (EU) the construction rate of new buildings is very low and therefore achieving the EU targets regarding the Energy efficiency of the building sector is only possible through the reduction of the Energy needs of the existing building stock. A building design based on passive measures is a priority to reduce operational Energy consumption but it is not enough to achieve the nearly Zero Energy Building (nZEB) level. Consequently, the design must also consider active systems with high efficiency and the use of renewable Energy sources to partially/totally replace the use of non-renewable Energy. At this level, solar thermal and photovoltaic panels play an important role, mainly in countries with high levels of solar radiation, as in the Southern European countries. Nevertheless, there are still some barriers to overcome for the broader dissemination of the implementation of these systems. One of the most important is that building owners are not fully aware of the life cycle benefits that these systems have at environmental and economic levels. The best way to raise awareness to these benefits is through the analysis of case studies, highlighting the short or mid-term benefits resulting from the integration of these active solutions. Thus, this paper is aimed at analysing the environmental and life cycle costs of different Energy Renovation scenarios, assessing the contribution of the solar systems to achieve three levels of Energy performance. The study is focused on the Energy Renovation of a detached single-family house considering the climatic conditions of Porto, Portugal. From the results, it is possible to conclude that, on an annual basis, and for the Portuguese climate, it is possible to overcome, many of the Energy needs for acclimatization and preparation of domestic hot water with the integration of these systems. The study also shows attractive economic and carbon payback times resulting from their use..COST -European Cooperation in Science and Technology(TU1205)info:eu-repo/semantics/publishedVersio
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effect of embodied Energy on cost effectiveness of a prefabricated modular solution on Renovation scenarios in social housing in porto portugal
Sustainability, 2020Co-Authors: Manuela Guedes De ,almeida, Ricardo Luis Barbosa, Raphaele MalheiroAbstract:A large-scale Energy Renovation intervention in existing buildings has been consistently presented as the most significant opportunity to contribute to achieving the European targets for 2030 and 2050. One of the key points for such achievement is the cost-effectiveness of the interventions proposed, which is also closely related to decent housing affordability. Prefabricated modular solutions have been pointed out as a pathway, but there are knowledge gaps regarding both its cost-effectiveness and its environmental performance. Considering a social housing multi-family building in Porto, Portugal, as a case study, this research employs Energy simulations, a cost-optimal methodology and a life cycle analysis approach to assess the influence of considering embodied Energy and emissions in cost-effectiveness calculations. In general terms, the hierarchical relation between calculated Renovation scenarios remain identical, as well as the choice of the cost-optimal combination, which can reduce primary Energy needs by 226 kWh/(y.m2). However, embodied carbon emissions and embodied Energy of the materials used in the calculations, which are indicative of the sustainability of such interventions, increase the Energy and carbon emissions associated to each Renovation package by an average of 43 kWh/(y.m2) and 9.3 kgCO2eq/(y.m2), respectively.
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relevance of embodied Energy and carbon emissions on assessing cost effectiveness in building Renovation contribution from the analysis of case studies in six european countries
Buildings, 2018Co-Authors: Manuela Guedes De ,almeida, Marco Antonio Pedrosa Santos Ferreira, Ricardo Luis BarbosaAbstract:The construction sector is facing increasingly strict Energy efficiency regulations. Existing buildings have specific technical, functional and economic constraints, which, in fulfilling regulations, could lead to costly and complex Renovation procedures and also lead to missed opportunities for improving their Energy performance. In this article, the methodology for comparing cost-optimality in building Renovations, developed in the International Energy Agency (IEA)–Energy in Buildings and Communities (EBC) Annex 56 project, is extended with a life cycle assessment by including embodied primary Energy and carbon emissions in the calculations. The objective is to understand the relevance of embodied Energy and carbon emissions in the evaluation of the cost effectiveness of building Renovation solutions towards nearly zero Energy buildings, as well as the effect of the embodied values in the achievable carbon emissions and primary Energy reductions expected in an Energy Renovation. Results from six case studies, representative of different regions in Europe, suggest that embodied values of Energy and carbon emissions have a decreasing effect—ranging from 2 to 32%—on the potential reductions of Energy and emissions that can be achieved with Renovation measures in buildings. In addition, the consideration of the embodied Energy and carbon emissions does not affect the ranking of the Renovation packages.
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Environmental and cost life cycle analysis of the impact of using solar systems in Energy Renovation of Southern European single-family buildings
Renewable Energy, 2018Co-Authors: Ricardo Mateus, Sandra Monteiro Silva, Manuela Guedes De ,almeidaAbstract:Nowadays, in the European Union (EU) the construction rate of new buildings is very low and therefore achieving the EU targets regarding the Energy efficiency of the building sector is only possible through the reduction of the Energy needs of the existing building stock. A building design based on passive measures is a priority to reduce operational Energy consumption but it is not enough to achieve the nearly Zero Energy Building (nZEB) level. Consequently, the design must also consider active systems with high efficiency and the use of renewable Energy sources to partially/totally replace the use of non-renewable Energy. At this level, solar thermal and photovoltaic panels play an important role, mainly in countries with high levels of solar radiation, as in the Southern European countries. Nevertheless, there are still some barriers to overcome for the broader dissemination of the implementation of these systems. One of the most important is that building owners are not fully aware of the life cycle benefits that these systems have at environmental and economic levels. The best way to raise awareness to these benefits is through the analysis of case studies, highlighting the short or mid-term benefits resulting from the integration of these active solutions. Thus, this paper is aimed at analysing the environmental and life cycle costs of different Energy Renovation scenarios, assessing the contribution of the solar systems to achieve three levels of Energy performance. The study is focused on the Energy Renovation of a detached single-family house considering the climatic conditions of Porto, Portugal. From the results, it is possible to conclude that, on an annual basis, and for the Portuguese climate, it is possible to overcome, many of the Energy needs for acclimatization and preparation of domestic hot water with the integration of these systems. The study also shows attractive economic and carbon payback times resulting from their use.
Jesper Kragh - One of the best experts on this subject based on the ideXlab platform.
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Energy Renovation of single family houses in denmark utilising long term financing based on equity
Applied Energy, 2011Co-Authors: Jesper Kragh, Jorgen RoseAbstract:Abstract This paper aims to present an economic overview of the opportunities for Energy Renovation of single-family houses in Denmark financed over the long term. The paper focuses on the economic difference between Energy savings and the repayment of investment. Taking out the average remaining 20% equity in long-term property mortgage loans and utilising it for extensive Energy Renovation improves both the economy and the extent of included measures. Approximately 30% of Energy consumption in Denmark is used for space heating. The existing 1 million single-family houses account for approximately half of this, thus making Energy Renovation a key factor for the reduction of CO2 emissions. The conclusions were that in average the possible budget for Renovation varied between €20,000 and 40,000 per single-family house. The equity of the house was particularly dependant on geographical location and construction period. Different Energy Renovation measures were analysed in terms of economy showing that a wide range of specific measures had a positive economic balance for the homeowner from year 1. The economic balance between saved Energy and repayment of the investment is however very dependent on the assumed future Energy price. An example showed that a typical house from 1925, still in its original form, could yield annual savings for the homeowner of approximately €2600, assuming a future Energy price of 0.2 €/kW h. At the current Energy price level of 0.1 €/kW h Energy Renovation in general is almost economically neutral for the homeowner.
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Energy Renovation of single family houses in denmark utilising long term financing based on equity
Applied Energy, 2011Co-Authors: Jesper Kragh, Jorgen RoseAbstract:This paper aims to present an economic overview of the opportunities for Energy Renovation of single-family houses in Denmark financed over the long term. The paper focuses on the economic difference between Energy savings and the repayment of investment. Taking out the average remaining 20% equity in long-term property mortgage loans and utilising it for extensive Energy Renovation improves both the economy and the extent of included measures. Approximately 30% of Energy consumption in Denmark is used for space heating. The existing 1 million single-family houses account for approximately half of this, thus making Energy Renovation a key factor for the reduction of CO2 emissions. The conclusions were that in average the possible budget for Renovation varied between [euro]20,000 and 40,000 per single-family house. The equity of the house was particularly dependant on geographical location and construction period. Different Energy Renovation measures were analysed in terms of economy showing that a wide range of specific measures had a positive economic balance for the homeowner from year 1. The economic balance between saved Energy and repayment of the investment is however very dependent on the assumed future Energy price. An example showed that a typical house from 1925, still in its original form, could yield annual savings for the homeowner of approximately [euro]2600, assuming a future Energy price of 0.2 [euro]/kWÂ h. At the current Energy price level of 0.1 [euro]/kWÂ h Energy Renovation in general is almost economically neutral for the homeowner.
Bahram Moshfegh - One of the best experts on this subject based on the ideXlab platform.
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a systematic approach to predict the economic and environmental effects of the cost optimal Energy Renovation of a historic building district on the district heating system
Energies, 2020Co-Authors: Vlatko Milic, Shahnaz Amiri, Bahram MoshfeghAbstract:The economic and environmental performance of a district heating (DH) system is to a great extent affected by the size and dynamic behavior of the DH load. By implementing Energy efficiency measures (EEMs) to increase a building’s thermal performance and by performing cost-optimal Energy Renovation, the operation of the DH system will be altered. This study presents a systematic approach consisting of building categorization, life cycle cost (LCC) optimization, building Energy simulation and Energy system optimization procedures, investigating the profitability and environmental performance of cost-optimal Energy Renovation of a historic building district on the DH system. The results show that the proposed approach can successfully be used to predict the economic and environmental effects of cost-optimal Energy Renovation of a building district on the local DH system. The results revealed that the financial gains of the district are between 186 MSEK (23%) and 218 MSEK (27%) and the financial losses for the DH system vary between 117–194 MSEK (5–8%). However, the suggested Renovation measures decrease the local and global CO2 emissions by 71–75 metric ton of CO2eq./year (4%) and 3545–3727 metric ton of CO2eq./year (41–43%), respectively. Total primary Energy use was decreased from 57.2 GWh/year to 52.0–52.2 GWh/year.
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evaluation of Energy Renovation strategies for 12 historic building types using lcc optimization
Energy and Buildings, 2019Co-Authors: Vlatko Milic, Klas Ekelow, Maria Andersson, Bahram MoshfeghAbstract:The life cycle cost (LCC)optimization is a vital method when performing building Energy Renovation. The present paper provides an evaluation of cost-optimal Energy Renovation strategies for histori ...
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Investigating cost-optimal Energy Renovation of a multifamily building in Sweden
Energy and Buildings, 2019Co-Authors: Lina La Fleur, Patrik Rohdin, Bahram MoshfeghAbstract:Abstract A significant reduction in Energy use in the building stock is a major challenge for the future, and doing this in a cost-effective manner is important. This study uses an optimization approach to identify life cycle cost (LCC) optimal Energy efficiency measures (EEMs) to implement as part of a Renovation of a multifamily building in Sweden. The studied building is a multifamily building with a lightweight concrete construction and an exhaust air ventilation system, built in 1961. The optimization tool OPERA-MILP is used. The Energy Renovation approaches are compared to both the performed Energy Renovation of the building and a validated dynamic Energy simulation model in IDA ICE 4.8. The results show that under the given framework conditions and assumptions it is not cost-optimal to improve the thermal performance of the building envelope or to implement heat recovery ventilation measures to reduce the space heating demand in the building when considering a life cycle of 40 years. Balanced mechanical ventilation system with heat recovery is cost-effective when an Energy saving target of 40% is introduced. The Energy Renovation of the building has a slightly higher LCC than the cost-optimal level, and it would have been more cost-effective to add more insulation to the facade instead of the attic to achieve the same level of Energy saving. A sensitivity analysis has been performed to reveal the effect of the discount rate, Energy price, cost of EEMs, thermal properties of the building envelope and windows’ solar heat gain factors on the LCC.
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lcc assessments and environmental impacts on the Energy Renovation of a multi family building from the 1890s
Energy and Buildings, 2016Co-Authors: Linn Liu, Patrik Rohdin, Bahram MoshfeghAbstract:The 2020 and 2050 Energy targets increase requirements on Energy performance in the building stock, thus affecting both listed and non-listed buildings. It is important to select appropriate and cost-optimal Energy efficiency measures, using e.g. Life Cycle Cost (LCC) optimization. The aim of this paper is to find cost-optimal packages of Energy efficiency measures (EEMs) as well as to explore the effects of specific predesigned Energy target values for a listed Swedish multi-family building from the 1890s. The purpose is also to show the effects on Energy use, LCC, primary Energy use and CO2 emissions of different Energy targets, discount rates, electricity prices and geographic locations. The results show that separate Energy targets could be an effective way to simplify the implementation for listed buildings. Furthermore, a cost-optimal package of EEMs is more sensitive to changes in discount rate than in electricity price. The Energy Renovation has impact on the primary Energy use and CO2 emissions. The lower the discount rate is, the more EEMs will be implemented and the easier the national Energy targets may be achieved. A higher electricity price also leads to more EEMs being implemented but at the same time higher running costs.