Publications
Case study on residential building renovation and its impact on the energy use and thermal comfort
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Publication Year:
2014
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Publication Year:
2014
Abstract In Norway, a large portion of the building stock originates from the period from 1955 to 1990. Many of these buildings fail to comply with the current building regulations regarding the energy consumption. In this study, the possibility for upgrading a hypothetical apartment building with an oil-based heating system has been investigated employing simulations from the IDA Indoor Climate and Energy software. For the construction of the original building, customs and regulations from the period 1981-90 were employed, and the building envelope was upgraded to the requirements of the Norwegian research centre on Zero Emission Buildings. Two alternative heating…
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Calcined clay as an alternative binder: A further step towards achieving thermally insulating structural concrete based on aerogel
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Publication Year:
2015
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Publication Year:
2015
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Bærekraftig rehabilitering av eneboliger mot nullenerginivå
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Publication Year:
2012
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Publication Year:
2012
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Bygninger – bransjens bidrag til bærekraftig utvikling
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Publication Year:
2015
Authors:
Publication Year:
2015
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Bygger Norges første plusshuss
Publication Year:
2013
Publication Year:
2013
Hele 1556 kvadratmeter med solceller gjør at Norge får sitt første plusshus i Bærum. Artikkelen skrevet av Caroline Drefvelin.
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Byggenæringen må ta og tar klimautfordringene på alvor
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Publication Year:
2016
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Publication Year:
2016
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ByBo vil bygge 800 nullutslippsboliger i Bergen
Publication Year:
2015
Publication Year:
2015
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Building regulations cannot assure ambitious energy upgrading of existing residential buildings according to Norway’s national targets
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Publication Year:
2015
Authors:
Publication Year:
2015
Summary This paper provides a summary of main content and conclusions from a report on evaluation of existing potential and scenario studies concerning renovation of residential buildings. In addition to literature studies there were conducted own calculations adapted from the most important Norwegian scenario model. Also studies addressing design of regulatory requirements for measures with existing buildings were reviewed. The results were discussed in expert workshops. The technical potential for energy upgrade seems to be under- rather than overestimated. On the other hand, the paper substantiates that the renovation rate is lower than assumed in the scenarios, and illustrates that…
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Building integration of aerogel glazings
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Publication Year:
2016
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Publication Year:
2016
Abstract The recent building practices have shown that aerogel glazings can be used as a multifunctional building envelope component for different purposes. Nevertheless, the distinctive physical properties and energy performance of aerogel glazings suggest that building integration of aerogel glazings may create architectural challenges, aesthetic problems, as well as concerns on their durability and environmental impact, thus highlighting the importance of developing guidelines to regulate the use of aerogel glazings in the building sector. This study discusses various approaches for the building integration of aerogel glazings by presenting a number of successful examples; the advantages of integration are quantified and…
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Building Integrated Photovoltaics - A State-of-the-Art Review, Future Research Opportunities and Large-Scale Experimental Wind-Driven Rain Exposure Investigations
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Publication Year:
2012
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Publication Year:
2012
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Building integrated photovoltaic products: a state-of-the-art review and future research opportunities
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Publication Year:
2012
Authors:
Publication Year:
2012
Building integrated photovoltaics (BIPVs) are photovoltaic (PV) modules integrated into the building envelope and hence also replacing traditional parts of the building envelope, e.g. the roofing. In this context, the BIPVs integration with the building envelope limits the costs by serving dual purposes. BIPVs have a great advantage compared to non-integrated systems because there is neither need for allocation of land nor stand-alone PV systems. This study seeks to outline various commercially available approaches to BIPVs and thus provides a state-of-the-art review. In addition, possible future research opportunities are explored. The various categories of BIPVs may be divided into photovoltaic…
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Brukerundersøkelse om innemiljø på Marienlyst skole
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Publication Year:
2012
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Publication Year:
2012
Innemiljøet på Marienlyst skole i Drammen, Norges første "passivhus-skole", er evaluert gjennom intervju og spørreskjema med brukere. Det er utført tre intervjurunder i løpet av 2011 med totalt 23 informanter; lærere, elever og representanter fra driftspersonalet. I tillegg er det utført en spørreskjemaundersøkelse om inneklimaet i slutten av 2011, for alle elever og ansatte.
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Boligområdet Skarpnes i Arendal
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Publication Year:
2012
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Publication Year:
2012
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Between standardisation and flexibility. Norwegian controversies around sustainable building certification
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Publication Year:
2013
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Publication Year:
2013
We are currently witnessing in the Norwegian building sector (and elsewhere) the transition from isolated and heterogeneous sustainable building projects carried out in protected niches (e.g pilot projects) to more sustainable buildings becoming mainstream. According to scholars studying sustainable transitions this is the moment in which a dominant design catches on, replacing and displacing other more or less sustainable alternatives. Within this process, in the Norwegian case, the principles behind the passive house play a salient role. In fact, only recently a government white paper has called for "passive house levels" to become part of the building code by 2015.…
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Between Research and Practice: Experts on Implementing Sustainable Construction
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Publication Year:
2013
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Publication Year:
2013
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Beregning av kuldebroverider for golv på grunn
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Publication Year:
2013
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Publication Year:
2013
Denne rapporten begrenser seg til å presentere en metode for beregning av kuldebroverdier for tilslutningen mellom yttervegg og golv på grunn (ringmursløsninger). I både NS 3031 og NS‐EN ISO 10211 åpnes det for en forenklet beregning av kuldebroverdien etter en annen internasjonal standard; NS‐EN ISO 13370. Denne beskriver en forenklet prosedyre for beregning av U‐verdien til golv mot grunn basert på en korreksjon til U‐verdier beregnet etter NS‐EN ISO 6946.
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Behov for beregning, modellering og simulering; Historisk utvikling
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Publication Year:
2012
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Publication Year:
2012
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Avoiding snow and ice formation on exterior solar cell surfaces – a review of research pathways and opportunities
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Publication Year:
2016
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Publication Year:
2016
Abstract Today energy-efficient and energy-harvesting buildings experience an ever-increasing interest and demand. Building integrated photovoltaics (BIPV) may in this respect represent a powerful and versatile tool for reaching the goal of zero energy and zero emission buildings. The BIPV systems replace the outer building envelope skin, thus serving simultanously as both a climate screen and a power source generating electricity. However, snow and ice formation on the exterior solar cell surfaces reduce their performance and may also lead to faster deterioration. Hence, if one could find a way to develop solar cells which were able to avoid snow and ice…
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Artium Design in Office Buildings. An evaluation of how artium design influences the daylight availability
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Publication Year:
2013
Authors:
Publication Year:
2013
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Arkitektstudenter og plusshus. Nå lærer arkitektstudentene om plusshus
Publication Year:
2013
Publication Year:
2013
For første gang lærer arkitektstudenter å tegne hus som produserer energi. Artikkel i Teknisk Ukeblad, skrevet av Joachim Seehusen.
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Architectural integration of photovoltaic cells overview of materials and products from an architectural point of view
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Publication Year:
2012
Authors:
Publication Year:
2012
The building skin is often called the third skin of a human being after the body skin and clothes since it provides protection from the elements, creates privacy and provides contact between the indoor and outdoor space. Moreover, it is the most important element regarding the total energy balance of buildings. Solar energy systems, and in particular solar cells, have an important role to play in reducing energy needs of buildings. Several building surfaces are ideally suited for the use of solar panels, but high costs as well as technical and aesthetical considerations have long kept building owners and architects…
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Architectural Integration of Photovoltaic and Solar Thermal Collector Systems into buildings
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Publication Year:
2012
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Publication Year:
2012
Solar technologies in the form of photovoltaics and thermal collectors have not been used to the expectation specially in building sector to replace the use of fossil fuels. The main reason for these technologies not being popular in building integration is the lack of good architectural quality rendered not meeting desired design considerations. Hence, the objective of the thesis is to pave possible ways of integrating these technologies into buildings, both on existing and new constructions to add emphasis on the overall architectural expression in addition to producing energy. Basic focus is on the appearance of aesthetics part of integration…
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Architectural design og Zero Emission Buildings - The case of the LivingLAB at the ZEB research centre
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Publication Year:
2016
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Publication Year:
2016
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Application of Vacuum Insulation Panels in Retrofitting of Timber Frame Walls – An Experimental and Theoretical Study of Moisture, Thermal Performance and Robustness
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Publication Year:
2010
Authors:
Publication Year:
2010
A large amount of the buildings in Norway is from the 1970s. Many of these buildings have timber frame walls and are now ready to be retrofitted. Application of vacuum insulation panels (VIPs) can make it easier to improve the thermal insulation in building walls with a minimal additional thickness. Retrofitting of buildings using VIPs may therefore be done without large changes to the building, e.g. extension of the roof protruding and fitting of windows. Additionally, U-values low enough to fulfil passive house standars or zero energy building requirements may be achieved. Thus, contribute to a reduction of the energy…
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Antireflection properties of monodisperse hollow silica nanospheres
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Publication Year:
2013
Authors:
Publication Year:
2013
Monodisperse hollow silica nanospheres have been prepared by using a polystyrene nanosphere template-assistant approach and their potential as antireflection (AR) coatings for window applications has been discussed. The as-prepared hollow silica nanospheres have a typical inner diameter of 200 nm and a shell thickness of 15–20 nm. The AR effect over the ultraviolet-visible-near infrared spectral region has been observed for the hollow silica nanospheres, with a minimized reflection of about 5.2 % at 500 nm, compared to 8.5 % of a plain float glass substrate. By modifying the structural features of the hollow silica nanospheres, their AR properties can be…
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Annual Report 2012
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Publication Year:
2013
Authors:
Publication Year:
2013
The Research Centre on Zero Emission Buildings - Annual Report 2012
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Analysis of the air heating in Norwegian passive houses using detailed dynamic simulations
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Publication Year:
2014
Authors:
Publication Year:
2014
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Analysis of the air heating in Norwegian passive houses using detailed dynamic simulations
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Publication Year:
2013
Authors:
Publication Year:
2013
The passive house (PH) standard is seen as the future minimal requirement for buildings in Norway, where a specific definition has been developed (NS 3700). Nevertheless, the relation between this standard and air heating (AH) is not clear while both concepts are often associated. The present contribution investigates challenges for AH in terms of thermal dynamics (e.g. temperature distribution and control) as well as the feasibility of the AH concept. This is done using detailed dynamic simulations on a typical detached house typology. Results show some limitations of the AH concept in Nordic countries, as well as provide guidelines for…
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Analysis of load match and grid interaction indicators in net zero energy buildings with simulated and monitored data
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Publication Year:
2014
Authors:
Publication Year:
2014
Abstract The main objective of this paper is to contribute to the discussion on the role of Net Zero Energy Buildings (Net ZEBs) on future energy systems by the interplay between on-site generation and the building loads, often called load matching, and the resulting import/export interaction with the surrounding electricity grid, commonly named grid interaction. This investigation analyzes five case studies with high resolution data, three of which are based on real monitored buildings. The research aims at selecting and suggesting a limited set of quantitative indicators that: (a) can provide practical information for building as well as grid designers…
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Analysis of grid interaction indicators in net zero-energy buildings with sub-hourly collected data
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Publication Year:
2015
Authors:
Publication Year:
2015
Abstract This paper aimed to contribute to the discussion about the role of net zero-energy buildings (ZEBs) or nearly ZEBs in future energy systems, from the perspective of the resulting import/export interaction with the surrounding energy grid (commonly named grid interaction (GI)). This investigation analyses three buildings with measured data at sub-hourly time resolution. The goal of this paper was to quantify the effect of using high-resolution data (one or a few minutes) versus hourly resolution in the GI analysis of buildings with an on-site generation system. A limited set of quantitative GI indicators have been selected: the generation multiple,…
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Analysis of CO2 heat pump for low energy residential building
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Publication Year:
2013
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Publication Year:
2013
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Analysis of change in design procedures for heat pump systems in nZEB
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Publication Year:
2014
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Publication Year:
2014
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Analysis and design of systems for thermal-energy storage at moderate temperatures based on Phase Change Materials (PCM)
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Publication Year:
2014
Authors:
Publication Year:
2014
Abstract Because human population is growing at such a high rate, as well as the energy consumption per person, new ways of preserving and efficiently using available energy must be explored. Until new and abundant energy sources are found and means of their exploitation developed, research attention should be focused on finding ways of proper and safe use of what is nowadays available. In that sense, storage of thermal energy plays an important role both in heating and/or cooling applications, such as in residential or commercial buildings, and in industrial processes. Some of the technical solutions are based on phase…
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Analysis and design of solar based systems for heating and cooling of buildings
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Publication Year:
2014
Authors:
Publication Year:
2014
Abstract Thermal performance of the solar thermal systems are estimated using numerical methods and software since the solar processes are transitient in nature been driven by time dependent forcing functions and loads. The system components are defined with mathematical relationships that describe how components function. They are based on first principles (energy balances, mass balances, rate equations and equilibrium relationships) at one extreme or empirical curve fits to operating data from specific machines such as absorption chillers. The component models are programed i.e. they represent written subroutines which are simultaneously solved with the executive program. In this thesis for executive…
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All buildings are still solar buildings
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Publication Year:
2011
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Publication Year:
2011
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All buildings are solar buildings – Zero energy and zero emission buildings
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Publication Year:
2015
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Publication Year:
2015
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Aktivbygg – hva er det og hvorfor skal vi bygge det?
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Publication Year:
2010
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Publication Year:
2010
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Aging Effects on Thermal Properties and Service Life of Vacuum Insulation Panels
Authors:
Publication Year:
2011
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Publication Year:
2011
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Aerogel-Incorporated Concrete: An Experimental Study
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Publication Year:
2014
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Publication Year:
2014
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Aerogel vs. argon insulation in windows: A greenhouse gas emissions analysis
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Publication Year:
2016
Authors:
Publication Year:
2016
Abstract The scope of this study is a comprehensive analysis of the greenhouse gas emissions from the partial substitution of triple-glazing units with argon gas (U-value of 0.79 W/m2 K) with double-glazing units with either monolithic aerogel (U-value of 0.65 W/m2 K) or granular aerogel (U-value of 0.31 W/m2d K). A residential building located near Oslo and fully upgraded with passive house solutions is used as a case study for this analysis. A cradle-to-site analysis is performed on the facade components. Two replacement schedules and three window-to-wall ratios are used to evaluate the differences in total emissions. Sensitivity analyses based on increasing the fraction of the…
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