Cost-effective passive house renovation packages for Swedish single-family houses from the 1960s and 1970s

Ekström, Tomas; Bernardo, Ricardo; Blomsterberg, Åke

doi:10.1016/j.enbuild.2017.12.018

Cited by 62 publications

(33 citation statements)

References 4 publications

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“…By 2020, it is intended to grow the renovation up to 2-3% (the highest percentage considers public buildings), improving to 20% the building stock energy efficiency, and 27% by 2030. 2 Past construction technology tends to be less energy efficient when compared to the newer: meaning higher energy consumption and therefore more CO2 emissions [5]. Nevertheless, not all of the existing buildings have the same renovation potential to achieve the required efficiency, depending on its owner's usage intentions and financial capacity, construction potential, and architecture nobility [6].…”

Section: Questionmentioning

confidence: 99%

“…The AMS action depends on a sensor to read and detect an anomaly and to report it to the external server (1); confirmed by calibrated models (2); and redirected to the AMS server (3). The facility manager's team will receive a report (4) that requires confirmation on-site (5), if favorable, it will be submitted to the property's managers (6/7), after accepted is transferred to procurement services (8).…”

Section: Maintenance Adviser System (Mas) and Automatic Maintenance Smentioning

confidence: 99%

“…More would be possible, assuming today's knowledge and technologies, but due to players conservatism, new approaches were unconsidered, especially when the new is more expensive and unproven. Nevertheless, when applied to buildings, savings of 65% to 90% can be achieved, if efficient acclimatization is used, comparing the initial consumptions to the renovated [2].…”

Section: Introductionmentioning

confidence: 99%

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Automation for building performance and maintenance efficiency

Cortiços¹

2018

Creative Construction Conference 2018 - Proceedings

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In Western Europe, 80% of buildings will continue to exist beyond 2050. Almost all, 98-99%, need to be updated and maintained in conformity with the requirements to new buildings, designated as nearly zero-energy buildings (nZEBs). In principle, buildings with modern superstructures have a potential lifespan of over 120 years, without compromising safety. Considering materials, labor, logistics, pollution, gas emissions, energy involved in the construction and assuming its heritage value, it is recommended a full modernization of buildings to assure their utility in favor of communities. This research focuses on reaching the maintenance efficiency and buildings performance, without increasing the costs. The Model is designed to measure and anticipate the degradation of buildings, in three steps. Starting with a network of active sensors, embedded and non-embedded in layers of components and subcomponents, which survey and monitor the condition of the building systems. Those will provide accurate data for computational analysis (first step) and quantify and qualify the viability of construction systems with the highest impact on building performance. The information supports the managers' decisions (second step), before compromising the materials and the constructive solutions, saving work time, reducing maintenance costs, and assuring the highest performance, while preserving user's comfort. And promote a rapid and specific response to stop early anomalies (third step), by obtaining an outsourced contract to respond to daily basis needs (and not tasks) with specialized technicians. The information collected will help to determine policies, anticipate anomalies, plan proper maintenance, ranking investments and intervene on marked systems. The three-step model aims for a reduction of natural resources usage, a decrease of human impact, to increase the efficiency and to improve the performance of the building stock.

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Section: Questionmentioning

confidence: 99%

Section: Maintenance Adviser System (Mas) and Automatic Maintenance Smentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Automation for building performance and maintenance efficiency

Cortiços¹

2018

Creative Construction Conference 2018 - Proceedings

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“…This led to the development and propagation of highly efficient "passive" buildings [12]. However, literature such as [13] and [14] suggests that the potential for further savings in contemporary building designs is limited by increasing investment costs and embodied energy (as well as other environmental impacts). Therefore, the industry is looking for new solutions that will not only minimize energy losses, but also utilize the energy gains available on-site.…”

Section: Introductionmentioning

confidence: 99%

Life Cycle Assessment of Solar Façade Concepts Based on Transparent Insulation Materials

Struhala¹,

Čekon²,

Slávik³

2018

Preprint

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Contemporary architects and the construction industry are trying to cope with increasing requirements concerning energy efficiency and environmental impact. One of the available options is the active utilization of energy gains from the environment, specifically solar energy gains. These gains can be utilized by, for example, solar walls and facades. The solar façade concept has been under development for more than a century. However, it hasn’t achieved widespread use for various reasons. Rather recently the concept was enhanced by the application of transparent insulation materials that have the potential to increase the efficiency of such façades. The presented study evaluates the environmental efficiency of 10 solar façade assemblies in the mild climate of the Czech Republic, Central Europe. The evaluated façade assemblies combine the principles of a solar wall with transparent insulation based on honeycomb and polycarbonate panels. The study applies Life-Cycle Assessment methodology to the calculation of environmental impacts related to the life cycle of the evaluated assemblies. The results indicate that even though there are several limiting factors, façade assemblies with transparent insulation have lower environmental impacts compared to a reference assembly with standard thermal insulation. The highest achieved difference is approx. 84% (in favour of the assembly with transparent insulation) during a modelled 50-year façade assembly service life.

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“…In this case, wall insulation was deemed economical. Ekström et al [21] reported that the cost-effectiveness of detached house energy retrofitting in Sweden was dependent on the heating system of the house. Generally, installing exhaust air heat pumps was cost-effective, while window retrofitting was not.…”

mentioning

confidence: 99%

Towards the EU Emission Targets of 2050: Cost-Effective Emission Reduction in Finnish Detached Houses

et al. 2019

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To mitigate the effects of climate change, the European Union calls for major carbon emission reductions in the building sector through a deep renovation of the existing building stock. This study examines the cost-effective energy retrofit measures in Finnish detached houses. The Finnish detached house building stock was divided into four age classes according to the building code in effect at the time of their construction. Multi-objective optimization with a genetic algorithm was used to minimize the life cycle cost and CO2 emissions in each building type for five different main heating systems (district heating, wood/oil boiler, direct electric heating, and ground-source heat pump) by improving the building envelope and systems. Cost-effective emission reductions were possible with all heating systems, but especially with ground-source heat pumps. Replacing oil boilers with ground-source heat pumps (GSHPs), emissions could be reduced by 79% to 92% across all the studied detached houses and investment levels. With all the other heating systems, emission reductions of 20% to 75% were possible. The most cost-effective individual renovation measures were the installation of air-to-air heat pumps for auxiliary heating and improving the thermal insulation of external walls.

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Cost-effective passive house renovation packages for Swedish single-family houses from the 1960s and 1970s

Cited by 62 publications

References 4 publications

Automation for building performance and maintenance efficiency

Automation for building performance and maintenance efficiency

Life Cycle Assessment of Solar Façade Concepts Based on Transparent Insulation Materials

Towards the EU Emission Targets of 2050: Cost-Effective Emission Reduction in Finnish Detached Houses

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Cost-effective passive house renovation packages for Swedish single-family houses from the 1960s and 1970s

Cited by 62 publications

References 4 publications

Automation for building performance and maintenance efficiency

Automation for building performance and maintenance efficiency

Life Cycle Assessment of Solar Fa&ccedil;ade Concepts Based on Transparent Insulation Materials

Towards the EU Emission Targets of 2050: Cost-Effective Emission Reduction in Finnish Detached Houses

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Life Cycle Assessment of Solar Façade Concepts Based on Transparent Insulation Materials