Publications
Antireflection properties of monodisperse hollow silica nanospheres
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Publication Year:
2013
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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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Influence of the occupant’s behavior on the heating needs and the energy system performance : A case of well-insulated detached houses in the cold climates
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Publication Year:
2015
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Publication Year:
2015
Abstract Modeling simplification related to occupant’s behavior is a major cause of gap between actual and model’s predicted energy use of buildings. This paper aims to identify those parameters of realistic occupants-related heat gains that actually cause this gap. The investigation therefore, systematically distinguishes the occupant behavior using three behavior parameters, namely: the occupancy behavior, the appliance use behavior and the family size. The effect of these parameters is investigated on a building for two different insulation standards using heat pump as energy supply system. The results identifies the occupancy patterns and the household size as two major parameters that explains a large portion…
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Status ZEB – Zero Emission Buildings
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Publication Year:
2010
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Publication Year:
2010
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Conference presentations
Optimal transparent percentage in façade modules for office buildings in a central Europe climate: a case study in Frankfurt
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Publication Year:
2012
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Publication Year:
2012
The building enclosure plays a relevant role in the management of the energy flows in buildings and in the exploitation of the solar energy at building scale. An optimized configuration of the façade can contribute to reduce the total energy demand of the building. Traditionally, the search for the optimal façade configuration is obtained by analyzing the heating demand and/or the cooling demand only, while the implication of the façade configuration on the energy demand for artificial lighting is often not considered, especially during the first stage of the design process. A global approach (i.e. including heating, cooling and artificial…
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Experimental investigations of vacuum insulation panels in an alkaline environment
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Publication Year:
2015
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Publication Year:
2015
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Experimental synthesis of hollow silica nanospheres for application as superinsulation in the buildings of tomorrow
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Publication Year:
2015
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Publication Year:
2015
ABSTRACT The path toward energy-efficient buildings with a low or zero carbon footprint, e.g. zero energy and zero emission buildings, involves the development of high-performance thermal insulation, aiming at reaching thermal conductivities far below 20 mW/(mK). Applying such superinsulation will allow the construction of relatively thin building envelopes yet maintaining a high thermal resistance, thus also increasing the architectural design possibilities. A vacuum insulation panel (VIP) represents a stateof-the-art thermal insulation solution with a thermal conductivity of typical 4 mW/(mK) in the pristine and non-aged condition. However, the VIPs have issues with fragility, perforation vulnerability, increasing thermal conductivity during time…
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ZE+hytte - A net zero energy building concept
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Publication Year:
2011
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Publication Year:
2011
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Investigation of prototype membrane based energy exchanger
Publication Year:
2012
Publication Year:
2012
In order to minimize the energy use for heating, passive houses for residential use are constructed using heavy insulation. In addition, they have minimal air leakages and no vents in exterior walls for direct supply of fresh air, and thus, mechanical ventilation systems are a mandatory requirement in such buildings. With the aim of reducing energy use, efficient energy recovery from used air will be of high importance. In residential buildings with several living units, centralized air handling units are regarded as the most energy efficient system. However, to prevent odours to transfer between apartments it is important to avoid…
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Life-cycle assessment of a multi-family residence built to passive house standard
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Publication Year:
2012
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Publication Year:
2012
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New solutions for facade energy insulation. Examples from some research projects
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Publication Year:
2015
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Publication Year:
2015
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Thermal and Hygrothermal Assessment of Polystyrene Encapsulated Vacuum Insulation Panels - Experimental and Numerical Investigations
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Publication Year:
2011
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Publication Year:
2011
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Electrochromic Materials and their characterization by solar radiation glazing factors for smart window applications
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Publication Year:
2014
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Publication Year:
2014
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Fremtidens byggstatus på forskningsfronten
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Publication Year:
2013
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Publication Year:
2013
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Nano insulation materials for energy efficient buildings: a case study on hallow silica naonspheres
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Publication Year:
2012
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Publication Year:
2012
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Interventions on energy behaviour in non-residential buildings – a literature review
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Publication Year:
2014
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Publication Year:
2014
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The intricate way towards the zero emission buildings: the Passive House controversy in Norway
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Publication Year:
2011
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Publication Year:
2011
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Passivhusstandard for nybygg fra 2020?
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Publication Year:
2010
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Publication Year:
2010
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Vi ville at miljøhensynet skulle være en livsstil – ikke bare en hobby
Publication Year:
2015
Publication Year:
2015
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Roof-integrated PV in Nordic climate - Building physical challenges
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Publication Year:
2015
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Publication Year:
2015
Abstract Use of photovoltaics (PV) is key remedies in buildings where a large part of the energy supply should be based on renewable energy. PV in Nordic climate can be challenging because of snow, wind and temperatures below zero. The aim of this research work has been to provide a state-of-the art overview of recent experiences and challenges for building physical conditions related to the use of roof-integrated PV in Nordic climate. The study has identified practical guidelines for installation and ventilation of the roofing as challenges to be solved for extensive use of such systems in Nordic climate.
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Energy Supply Solution for Low-Energy Commercial Buildings in Cold Climates
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Publication Year:
2013
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Publication Year:
2013
The aim of the study was to define an energy supply solutions for a low-energy commercial building in cold climates. A new low-energy office building built with high quality building insulation better than the Norwegian passive building standard was analyzed by using EnergyPlus. The results showed that the heat pump solutions could be used to cover the building base load, while the peak load should be covered by additional energy sources. Due to a high indoor temperature caused by the high quality building insulation standard, an increase in ventilation air flow was necessary during the summer. To fully utilize the…
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Solar Radiation Glazing Factors for Windows Panes, Glass structures and Electrochromic Windows in Buildings - Measurement and Calculation
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Publication Year:
2013
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Publication Year:
2013
Window panes, glass structures and electrochromic windows in buildings may be characterized by a number of solar radiation glazing factors, i.e. ultraviolet solar transmittance, visible solar transmittance, solar transmittance, solar material protection factor, solar skin protection factor, external visible solar reflectance, internal visible solar reflectance, solar reflectance, solar absorbance, emissivity, solar factor and colour rendering factor. Comparison of these solar quantities for different glass fabrications enables one to evaluate and thus select the most appropriate glass material or system for the specific buildings and applications. Measurements and calculations were carried out on various glass materials, including three electrochromic window devices,…
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A zero emission concept analysis of a single family home
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Publication Year:
2013
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Publication Year:
2013
The main aim of the work has been to do modeling and calculations of the energy use, embodied emission and the total CO2-emission for a typical Norwegian residential building. By doing this we try to reveal and study the main drivers for the CO2-emission, and also which performance is necessary for components and solutions in a Zero Emission Building according to the current Norwegian ZEBdefinition.
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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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Aerogel vs. argon insulation in windows: A greenhouse gas emissions analysis
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Publication Year:
2016
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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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All buildings are still solar buildings
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Publication Year:
2011
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Publication Year:
2011
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Comfort and Energy Efficiency Recommendations for Net Zero Energy Buildings
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Publication Year:
2010
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Publication Year:
2010
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Zero emission buildings and development of professional (energy) operation culture: Learning and professional development in operation of large buildings
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Publication Year:
2012
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Publication Year:
2012
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In the Morning I Just Need a Long, Hot Shower: A Sociology of the (Re)Distribution of the Energy Sensible
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Publication Year:
2011
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Publication Year:
2011
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Life cycle analyses of CO2 emissions of alternative retrofitting measures
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Publication Year:
2014
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Publication Year:
2014
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A net zero emission concept analysis of a Norwegian single family house – A CO2 accounting method
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Publication Year:
2013
Authors:
Publication Year:
2013
In order to reach the goal of a zero emission building (ZEB), CO2 emission data has to be made available and verified for traditional building materials, new ‘state-of-the-art’ building materials and the active elements used to produce renewable energy. However, an initial literature review found that although there are databases of embodied carbon values for most building materials, the range in results for some materials are varied and inconsistent. This paper follows on from previous work on the development of a transparent and robust method to calculate CO2eq emissions of the materials used in the concept analysis of the ZEB…
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NorDan skyvedør med VIP i Living Lab – beregning av U-verdi
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Publication Year:
2015
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Publication Year:
2015
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Forskningssenter for miljøvennlig energi: Zero Emission Buildings
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Publication Year:
2010
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Publication Year:
2010
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Criteria for Definition of Net Zero Energy Buildings
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Publication Year:
2010
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Publication Year:
2010
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Material research for Zero Emission Buildings
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Publication Year:
2014
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Publication Year:
2014
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Qualitative user evaluation of energy efficient buildings – Case studies of six passive houses and zero-energy buildings
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Publication Year:
2011
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Publication Year:
2011
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Nullenergi, plusshus, nullutslipp - hva betyr dette i praksis? Presentasjon av eksempler
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Publication Year:
2016
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Publication Year:
2016
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Modelling and Analysis of Heat Pumps for Zero Emission Buildings
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Publication Year:
2013
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Publication Year:
2013
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Strategies for renovation of single family dwellings from the 1980s towards zero energy levels
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Publication Year:
2011
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Publication Year:
2011
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Neste steg – fra passivhus til nullutslippsbygg
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Publication Year:
2010
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Publication Year:
2010
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Sammenligning av klimagass-utslipp med naturlig- og balansert ventilasjon
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Publication Year:
2012
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Publication Year:
2012
Dagens byggeforskrifter krever mye ekstra dokumentasjon om en ikke skal ha balansert ventilasjon, og dette legger i praksis sterke føringer for valg av ventilasjonsløsning. Imidlertid er klimagassutslipp med ulike ventilasjons-konsept i liten grad undersøkt.
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Skal bygge verdens mest energivennlige skole på Kolstad
Publication Year:
2015
Publication Year:
2015
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Kondensfare uluftede loft. Feltundersøkelse
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Publication Year:
2012
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Publication Year:
2012
Tradisjonelt har norske småhus hatt et kaldt loft med lufteåpninger i takutstikket. Luftingen av loftet skulle både sørge for en kald takflate og hindre fuktskader på undertak og taksperrer. De siste årene har det blitt vanligere at småhus bygges med et uluftet, kaldt loftsrom. I stedet brukes et dampåpent undertak og lufting under taktekkingen. En del slike loftsrom har fått kondens og vekst av muggsopp på undertaket. Denne rapporten viser årsaker og viktige tiltak for å unngå problemet.
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Verktøy for valg av energiforsyning
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Publication Year:
2012
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Publication Year:
2012
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