The Experts below are selected from a list of 29493 Experts worldwide ranked by ideXlab platform
Roger Sathre - One of the best experts on this subject based on the ideXlab platform.
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Impacts of end-use energy efficiency measures on life cycle primary energy use in an existing Swedish multi-story Apartment Building
Proceedings of the World Renewable Energy Congress – Sweden 8–13 May 2011 Linköping Sweden, 2011Co-Authors: Ambrose Dodoo, Leif Gustavsson, Roger SathreAbstract:Impacts of end-use energy efficiency measures on life cycle primary energy use in an existing Swedish multi-story Apartment Building
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life cycle primary energy implication of retrofitting a wood framed Apartment Building to passive house standard
Resources Conservation and Recycling, 2010Co-Authors: Ambrose Dodoo, Leif Gustavsson, Roger SathreAbstract:Here we analyze the life cycle primary energy implication of retrofitting a four-storey wood-frame Apartment Building to the energy use of a passive house. The initial Building has an annual final ...
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life cycle primary energy use and carbon emission of an eight storey wood framed Apartment Building
Energy and Buildings, 2010Co-Authors: Leif Gustavsson, Anna Joelsson, Roger SathreAbstract:In this study the life cycle primary energy use and carbon dioxide (CO2) emission of an eight-storey wood-framed Apartment Building are analyzed. All life cycle phases are included, including acquisition and processing of materials, on-site construction, Building operation, demolition and materials disposal. The calculated primary energy use includes the entire energy system chains, and carbon flows are tracked including fossil fuel emissions, process emissions, carbon stocks in Building materials, and avoided fossil emissions due to biofuel substitution. The results show that Building operation uses the largest share of life cycle energy use, becoming increasingly dominant as the life span of the Building increases. The type of heating system strongly influences the primary energy use and CO2 emission; a biomass-based system with cogeneration of district heat and electricity achieves low primary energy use and very low CO2 emissions. Using biomass residues from the wood products chain to substitute for fossil fuels significantly reduces net CO2 emission. Excluding household tap water and electricity, a negative life cycle net CO2 emission can be achieved due to the wood-based construction materials and biomass-based energy supply system. This study shows the importance of using a life cycle perspective when evaluating primary energy and climatic impacts of Buildings.
Leif Gustavsson - One of the best experts on this subject based on the ideXlab platform.
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Primary energy implications of different design strategies for an Apartment Building
Energy, 2016Co-Authors: Uniben Yao Ayikoe Tettey, Ambrose Dodoo, Leif GustavssonAbstract:In this study, we explored the effects of different design strategies on final and primary energy use for production and operation of a newly constructed Apartment Building. We analysed alternatives of the Building "As built" as well as to energy efficiency levels of the Swedish Building code and passive house criteria. Our approach is based on achieving improved versions of the Building alternatives from combination of design strategies giving the lowest space heating and cooling demand and primary energy use, respectively. We found that the combination of design strategies resulting in the improved Building alternatives varies depending on the approach. The improved Building alternatives gave up to 19-34% reduction in operation primary energy use compared to the initial alternatives. The share of production primary energy use of the improved Building alternatives was 39-54% of the total primary energy use for production, space heating, space cooling and ventilation over 50-year lifespan, compared to 31-42% for the initial alternatives. This study emphasises the importance of incorporating appropriate design strategies to reduce primary energy use for Building operation and suggests that combining such strategies with careful choice of Building frame materials could result in significant primary energy savings in the built environment.
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Impacts of end-use energy efficiency measures on life cycle primary energy use in an existing Swedish multi-story Apartment Building
Proceedings of the World Renewable Energy Congress – Sweden 8–13 May 2011 Linköping Sweden, 2011Co-Authors: Ambrose Dodoo, Leif Gustavsson, Roger SathreAbstract:Impacts of end-use energy efficiency measures on life cycle primary energy use in an existing Swedish multi-story Apartment Building
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life cycle primary energy implication of retrofitting a wood framed Apartment Building to passive house standard
Resources Conservation and Recycling, 2010Co-Authors: Ambrose Dodoo, Leif Gustavsson, Roger SathreAbstract:Here we analyze the life cycle primary energy implication of retrofitting a four-storey wood-frame Apartment Building to the energy use of a passive house. The initial Building has an annual final ...
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life cycle primary energy use and carbon emission of an eight storey wood framed Apartment Building
Energy and Buildings, 2010Co-Authors: Leif Gustavsson, Anna Joelsson, Roger SathreAbstract:In this study the life cycle primary energy use and carbon dioxide (CO2) emission of an eight-storey wood-framed Apartment Building are analyzed. All life cycle phases are included, including acquisition and processing of materials, on-site construction, Building operation, demolition and materials disposal. The calculated primary energy use includes the entire energy system chains, and carbon flows are tracked including fossil fuel emissions, process emissions, carbon stocks in Building materials, and avoided fossil emissions due to biofuel substitution. The results show that Building operation uses the largest share of life cycle energy use, becoming increasingly dominant as the life span of the Building increases. The type of heating system strongly influences the primary energy use and CO2 emission; a biomass-based system with cogeneration of district heat and electricity achieves low primary energy use and very low CO2 emissions. Using biomass residues from the wood products chain to substitute for fossil fuels significantly reduces net CO2 emission. Excluding household tap water and electricity, a negative life cycle net CO2 emission can be achieved due to the wood-based construction materials and biomass-based energy supply system. This study shows the importance of using a life cycle perspective when evaluating primary energy and climatic impacts of Buildings.
Ambrose Dodoo - One of the best experts on this subject based on the ideXlab platform.
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Primary energy implications of different design strategies for an Apartment Building
Energy, 2016Co-Authors: Uniben Yao Ayikoe Tettey, Ambrose Dodoo, Leif GustavssonAbstract:In this study, we explored the effects of different design strategies on final and primary energy use for production and operation of a newly constructed Apartment Building. We analysed alternatives of the Building "As built" as well as to energy efficiency levels of the Swedish Building code and passive house criteria. Our approach is based on achieving improved versions of the Building alternatives from combination of design strategies giving the lowest space heating and cooling demand and primary energy use, respectively. We found that the combination of design strategies resulting in the improved Building alternatives varies depending on the approach. The improved Building alternatives gave up to 19-34% reduction in operation primary energy use compared to the initial alternatives. The share of production primary energy use of the improved Building alternatives was 39-54% of the total primary energy use for production, space heating, space cooling and ventilation over 50-year lifespan, compared to 31-42% for the initial alternatives. This study emphasises the importance of incorporating appropriate design strategies to reduce primary energy use for Building operation and suggests that combining such strategies with careful choice of Building frame materials could result in significant primary energy savings in the built environment.
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Impacts of end-use energy efficiency measures on life cycle primary energy use in an existing Swedish multi-story Apartment Building
Proceedings of the World Renewable Energy Congress – Sweden 8–13 May 2011 Linköping Sweden, 2011Co-Authors: Ambrose Dodoo, Leif Gustavsson, Roger SathreAbstract:Impacts of end-use energy efficiency measures on life cycle primary energy use in an existing Swedish multi-story Apartment Building
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life cycle primary energy implication of retrofitting a wood framed Apartment Building to passive house standard
Resources Conservation and Recycling, 2010Co-Authors: Ambrose Dodoo, Leif Gustavsson, Roger SathreAbstract:Here we analyze the life cycle primary energy implication of retrofitting a four-storey wood-frame Apartment Building to the energy use of a passive house. The initial Building has an annual final ...
L K Norford - One of the best experts on this subject based on the ideXlab platform.
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simulation of wind driven ventilative cooling systems for an Apartment Building in beijing and shanghai
Energy and Buildings, 2002Co-Authors: Carrilho G Da Graca, Qingyan Chen, Leon R Glicksman, L K NorfordAbstract:Abstract This paper presents a performance evaluation of two passive cooling strategies, daytime ventilation and night cooling, for a generic, six-story suburban Apartment Building in Beijing and Shanghai. The investigation uses a coupled, transient simulation approach to model heat transfer and airflow in the Apartments. Wind-driven ventilation is simulated using computational fluid dynamics (CFD). Occupant thermal comfort is accessed using Fanger’s comfort model. The results show that night cooling is superior to daytime ventilation. Night cooling may replace air-conditioning systems for a significant part of the cooling season in Beijing, but with a high condensation risk. For Shanghai, neither of the two passive cooling strategies can be considered successful.
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energy consumption and conservation in the russian Apartment Building stock
Energy and Buildings, 1997Co-Authors: M W Opitz, L K Norford, Yu A Matrosov, I N ButovskyAbstract:Abstract Energy consumption of Buildings in Russia and other states of the former Soviet Union has typically been reported in very coarse terms, as annual energy use normalized by weather and floor area. Reported figures, based on estimates derived from available energy-delivery data, have shown that Russian residential Buildings consume on the order of twice as much primary energy for space-heating as those in some developed Western countries. Reports have been accompanied with qualitative assertions that higher levels of insulation, reduced air infiltration, and better control of heating systems could reduce energy use. However, there has been a dearth of data that first distinguish Russian Buildings by construction type and insulation level, and second attempt to quantitatively pinpoint causes for the relatively high energy use. Such data are needed to focus contemporary energy-conservation efforts in Russia on the most promising areas. This paper presents a preliminary set of information that illuminates these areas, concentrating on the city of Moscow. The analysis breaks down Moscow's district-heated Apartment Building stock by type and year of construction and by the required thermal standards in force at the time of construction. It aggregates these Buildings into three classes according to the type of external wall construction — brick or large block, single-layer panel, and three-layer panel — and estimates overall annual energy use for space-heating via a steady-state model. It then compares predicted and measured energy use, for the aggregation and, more accurately, for a single Building for which detailed energy-use data are available. In both cases there is a large discrepancy, with actual space-heating energy use exceeding design predictions by at least 60%. Analytical efforts to reconcile the excess energy consumption for the metered Building strongly suggest that the most important cause of relatively high space-heating energy use in the Building is poor control of heat delivery from the district heating system.
Targo Kalamees - One of the best experts on this subject based on the ideXlab platform.
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realisation of energy performance targets of an old Apartment Building renovated to nzeb
Energy, 2020Co-Authors: Anti Hamburg, Kalle Kuusk, Alo Mikola, Targo KalameesAbstract:Abstract Energy performance of Buildings directive sets a goal to achieve a highly energy efficient and decarbonised Building stock by 2050. In this study, a pilot nZEB (nearly zero energy Building) renovation of an existing Apartment Building is analysed. nZEB criteria of new Apartment Buildings was set as the energy performance target in designing renovation solutions. The whole Building envelope was additionally insulated with prefabricated modular panels and new service systems were installed. Measured energy consumption after the renovation showed that the pilot Building fulfilled the minimum energy performance requirements for new Apartment Buildings, but nZEB target was not achieved. Measured heating energy consumption is 1.6 times higher (mainly because of the higher indoor temperature, supply air temperature, window airing, and higher ventilation airflow rates which methodology for heating energy calculations are not taken into account) and measured energy need for DHW is 4.4 times higher (mainly because of the real use profiles as well unexpected performance of solar collector and sewerage heat recovery system) than expected in Building design. Results show that in renovation projects (also in new projects), occupant behaviour and the real use of Building should be used as more realistic input parameters for designing energy performance. Distribution and circulation losses of air handling units, heating coils and DHW (domestic hot water) systems should be taken into account in the national energy calculation methodologies as service system heat losses can be a significant part of energy consumption at nZEB levels. If the renovated Building would be used according to design methodology, the nZEB target can be achieved.
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case study analysis of concrete large panel Apartment Building at pre and post low budget energy renovation
Journal of Civil Engineering and Management, 2016Co-Authors: Kalle Kuusk, Targo Kalamees, Siim Link, Simo Ilomets, Alo MikolaAbstract:AbstractThe paper presents a case study analysis of low-budget renovation of a typical concrete large-panel Apartment Building. Focus is on the measurements and analyses of energy consumption, indoor climate, CO2 concentration, air leakage rate, thermal transmittance of thermal bridges, and thermal transmittance of the Building envelope before and after the renovation. Results indicate that the renovation project was generally successful, with delivered energy need decreasing by 40% and heating energy need decreasing by 50%. However, some key problems need to be solved to achieve full energy efficiency potential of the renovation works. Those critical problems are the performance (thermal comfort, heat recovery) of ventilation systems, thermal bridges of external wall/window jamb and economic viability. Currently, a major renovation is not economically viable, therefore financial assistance to the Apartment owners’ associations is required to encourage them to undertake major renovations.
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nZEB Retrofit of a Concrete Large Panel Apartment Building
Energy Procedia, 2015Co-Authors: Kalle Kuusk, Targo KalameesAbstract:Abstract The paper discusses energy renovation scenarios from major renovation to nZEB level for Apartment Buildings in Estonia (cold climate). The study analyses energy usage and economic viability taking into account a possible increase in the lease income after renovation under Apartment Building renovation scenarios. Our results show that deep renovation of old Apartment Buildings enables the energy performance requirements of nearly zero energy Apartment Buildings to be achieved. With nZEB renovation, reductions are ca 70% in delivered energy (heating energy + electricity) need and ca 60% in primary energy need. Payback period of nZEB renovation without increased lease income is around 30 years. In the best scenario case, the payback period of nZEB renovation is around eight years when the increase of the annual lease income is taken into account.