Publications
Kraftfullt miljøsatsing - Hvordan vi har jobbet for å få fram nye løsninger i Powerhouse?
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2013
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2013
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Hvordan legger myndighetene til rette for en innovativ og bærekraftig arkitektur? Erfaringer fra arbeidet med Powerhouse-prosjektene
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Publication Year:
2013
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2013
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Success for energy efficient renovation of dwelling - Learing from private homeowners
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Publication Year:
2013
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Publication Year:
2013
Large scale energy efficient renovation of buildings is one of the most important tools to realize the society's need of a more sustainable building stock. Most Norwegians own their own homes. Therefore private homeowners are a focus group for the government urging to accelerate the dwelling energy efficiency rates. Success factors were identified in the in-depth study of the decision process of eleven homeowners. Large differences in energy use due to the building's condition and the occupants' behavior was encountered in the sample. Only homeowners who were conscious consumers and did not trust expert advice or that had special knowledge…
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Identifying important variables of energy use in low energy office building by using multivariate analysis
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Publication Year:
2012
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Publication Year:
2012
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Nå bygger Forsvaret nullhus
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2013
Publication Year:
2013
Det nye administrasjonsbygget til forsvaret har et årlige beregnet energiforbruk på 16 kWh per kvadratmeter. Dette blir dermed et av landets mest energieffektive kontorbygg. Artikkel skrevet av Mari Gisvold Garathun.
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Unikt laboratorium baner veien mot nullutslipphuset
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2012
Publication Year:
2012
Vegger og vinduer får juling av sol, regn og frost i en ny klimasimulator i Trondheim, Den skal hjelpe byggebransjen med å gjøre drømmen om bygg uten utslipp av klimagasser til en realitet
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Hvordan anser markedet denne type bygg?
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2013
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2013
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Fremtidens byggstatus på forskningsfronten
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2013
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2013
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Status fra Zero Emission Buildings på energiforsyning – Status for arbeidspakke 3. Utvikling av nye og forbdrede produkter og løsninger for energiforsyning og tekniske installasjoner
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2012
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2012
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Eksempler på nær nullenergibygg
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2013
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2013
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Vil bygge 800 miljøboliger, men fylkesmannen sier nei
Publication Year:
2012
Publication Year:
2012
Kjetil Helland i ByBo AS har ventet i tre år på å realisere et av Norges viktigste miljøprosjekter. Nå haster det, sier han.
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Flytende tregulv – Pass på avstanden!
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Publication Year:
2012
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Publication Year:
2012
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Popular Science Articles
Innovative High Performance Thermal Building Insulation Materials - Today's State-of-the-Art and Beyond Tomorrow
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Publication Year:
2012
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Publication Year:
2012
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Retrofitting Timber Frame Walls with Vacuum Insulation Panels
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Publication Year:
2012
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2012
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Unngå byggskader ved laboratorietesting av nye materialer og løsninger
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Publication Year:
2012
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2012
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Small studies in architectural materiality
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Publication Year:
2012
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Publication Year:
2012
Within the frame of this exploratory essay, small studies in materiality are introduced as artifacts of relatively simple means, designer driven, and as useful in anchoring strategies to reflexively map research methods in art and design practices. Using concepts from science and technology studies (STS), a series of projects are contextually presented and modes of working are tracked. Small studies discusses how artists and designers can better position themselves to critically assess relationships between the complex, interconnected design issues they encounter in their artistic practices, and the methods they opt to employ. The essay concludes that in fields where art…
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The impact of sustainable research initiatives: What really gets built?
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Publication Year:
2011
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Publication Year:
2011
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Smartere byer
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Publication Year:
2013
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Publication Year:
2013
Folk flest bor i byer. I dag bor over halvparten av jordas befolkning i byer, og innen 2050 forventes andelen å øke til to tredjedeler.
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ZEB har fått sin første doktorgrad
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2013
Publication Year:
2013
Stipendiat ved NTNU og forskningsleder ved SINTEF Byggforsk, Birgit Risholt, disputerer 7. juni som første ZEB-PhD-kandidat siden senteret ble opprettet i 2009.
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Hvordan legger myndighetene til rette for en innovativ og bærekraftig arkitektur? Erfaringer fra arbeidet med Powerhouse-prosjektene
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Publication Year:
2013
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Publication Year:
2013
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The interaction between building and users in passive and zero-energy housing and offices: The role of interfaces, knowledge and user commitment
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Publication Year:
2013
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Publication Year:
2013
The article's aim is to present user experiences with passive houses and zero-energy buildings. The focus is on the interaction between the building and the users, specifically on how user interfaces, knowledge, and commitment influence the use of the building and the level of energy consumption awareness.
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Journal papers
Synthesis of Hallow Silica Nanospheres by Sacrificial Polystyrene Templates for Thermal Insulation applications
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Publication Year:
2013
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Publication Year:
2013
Monodisperse polystyrene (PS) spheres with controllable size have been synthesized by a straight forward and simple procedure. The as-synthesized PS spheres have a typical diameter ranging from ~180 nm to ~900 nm, where a reduced sphere size is obtained by increasing the polyvinylpyrrolidone (PVP)/styrene weight ratio. The PS spheres function as sacrificial templates for the fabrication of hollow silica nanospheres (HSNSs) for thermal insulation applications. By modifying the silica coating process, HSNSs with different surface roughness are obtained. All resulting HSNSs show typically a thermal conductivity of about 20 mW/(mK), indicating that the surface phonon scattering is probably not significant…
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FM towards zero emission buildings: Learning and professional development among energy operators of large buildings
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Publication Year:
2013
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Publication Year:
2013
Drawing on theories from studies of Facilities Management (FM) and social studies of science and technology as well as explorative qualitative research methods the purpose of this paper is to examine energy operations of large, existing buildings and how knowledge development and knowledge transfers may provide lessons for how FM of existing buildings may contribute to transition towards zero emission buildings. In this energy operation of existing buildings is described as an important measure towards sustainability. The relevant actors explored for this study are related to large non-residential buildings (university), and different types of large housing facilities (health rehabilitation and…
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Energieffektivisering i bygninger. Forsknings- og demonstrasjonsaktiviteter med utgangspunkt i ZEB
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Publication Year:
2013
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Publication Year:
2013
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Windows in the Buildings of Tomorrow; Energy Losers or Energy Gainers?
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Publication Year:
2013
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Publication Year:
2013
One of the most effective actions for reduction of energy loss through the building envelope is to optimize the thermal performance, area and localization of the transparent components in the façade in order to obtain minimal heat losses and optimal solar gains. When considering the thermal performance of these transparent components, one should consider, not only heat loss (or gains) caused by thermal transmission, but also the beneficial effects of incident solar radiation and hence reduced demand for heating and artificial lighting. This study presents calculations for a range of windows as part of a building where the coupled effects…
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Kan Powerhouse bli byggenæringens månelanding?
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Publication Year:
2012
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Publication Year:
2012
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Synthesis and Characterization of Sodium Tungsten Bronse Nanorods for Electrochromic Smart Window Applications
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Publication Year:
2013
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Publication Year:
2013
Single-crystalline sodium tungsten bronze (Na-WO3) nanorods with typical diameters of 10–200 nm and lengths of several of microns were prepared via hydrothermal synthesis. X-ray diffraction data showed that the as-prepared Na-WO3 nanorods crystallize in a hexagonal structure (space group P6 / mmm) with unit cell parameters a = 7.3166(8) Å and c = 3.8990(8) Å, and elongate along the <001> direction. The Na-WO3 nanorods had a mean chemical composition of Na0.18WO3.09·0.5H2O. The Na-WO3 nanorods exhibited a typical cathodic coloration related to proton insertion, indicating their potentials in electrochromic smart window applications.
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Greenhouse gas analysis of insulation options in residential energy retrofitting
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Publication Year:
2013
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Publication Year:
2013
In the pursuit of stricter energy standards for buildings to reduce their share of energy use, the use of highly efficient insulation materials like aerogel and vacuum insulation has opened a path towards lighter construction in energy retrofitting, whereas commercially available materials, such as EPS and mineral wool, result in massive wall solutions. However, these new materials are notoriously energy intensive in production, resulting in high levels of embodied energy and emissions. This work describes a comprehensive greenhouse gas analysis of the use of different insulation materials applied to residential building upgrades to passive house standard. It estimates the potential…
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Environmental perspective on two glazing typologies
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Publication Year:
2013
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Publication Year:
2013
Stricter energy regulations for energy use in buildings require new construction to be equipped with increasingly thicker insulation layers and minimal surfaces for glazing in cold climates. In recent years a new type of window has been proposed as a way to overcome the notoriously low thermal performance of transparent surfaces. In order to reach such performances, this glazing type has been equipped with monolithic aerogel as the glass-pane filling. The scope of this study is a comprehensive analysis of greenhouse gas emissions from the partial substitution of typical triple-glazing-with-argon units with double-glazing-with-monolithic-aerogel units in residential building upgrades. A social…
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The Research Centre on Zero Emission Buildings
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Publication Year:
2013
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Publication Year:
2013
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Advanced Façade Solutions. Towards energy efficient building skins
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Publication Year:
2013
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Publication Year:
2013
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Post-Occupancy Evaluation of Low-Energy and Passive House Apartments in the Løvåshagen Cooperative - Occupant Behavior and Satisfaction
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Publication Year:
2013
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Publication Year:
2013
Experience with low-energy and passive house buildings forms the basis for the further development of zero-emission buildings. A post-occupancy evaluation of the Løvåshagen cooperative is therefore conducted by means of user surveys and measurement of indoor climate parameters, energy use and window opening time. The goal of the post-occupancy evaluation is to obtain information about how occupants use and experience low-energy and passive house dwellings, especially with regard to heating and ventilation. In addition, the impact of user behavior on the indoor climate and energy use will be assessed. In this paper, the results of the user survey regarding user…
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Powerhouse Kjørbo: a plus-energy renovation office building project in Norway
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Publication Year:
2013
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Publication Year:
2013
The main definition of a Powerhouse is a building that shall produce at least the same amount of energy from on-site renewables as the energy used during construction, manufacturering of materials, renovation, demolition and operation exclusive energy used during manufacturering of equipment such as PCs, coffee machines etc. In addition the exported energy shall in average not have less quality than the imported energy. This implies that produced and exported electricity can offset corresponding amount of imported energy for both electricity and thermal purposes, while produced and exported thermal energy cannot offset imported electricity. The building shall also as a…
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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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Investigation of the Air-Heating Concept for Norwegian Passive Houses
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Publication Year:
2013
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Publication Year:
2013
The German definition of the passive house standard is strongly related to the air-heating (AH) concept, while this concept is not explicitly connected with the Norwegian definition (NS 3700 standard). As AH presents an opportunity for space-heating (SH) simplification, the AH potential is here investigated in the Norwegian context. The questions of the required AH temperatures, of the temperature distribution between rooms and the influence of losses from ventilation ducts are investigated using detailed dynamic simulations (here using TRNSYS). This is done using a typical detached house typology, both considering different building construction materials as well as different climate zones…
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A Norwegian Zero Emission Building Definition
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Publication Year:
2013
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Publication Year:
2013
The aim of the Norwegian research centre on Zero Emission Buildings(ZEB) is to develop competetive products and solutions of buildings with zero emission of greenhouse gases related to their production, operation and demolition. However, to develope solutions and concepts for zero emission buildings it is first necessarry to develop a sound definition of ZEB (for single buildings, and also cluster of buildings). During the first 3 years of the centres running, significant work have been done to adress different issues related to the ZEB-definition, among them defining CO2 factors for various energy wares. Work done in the International Energy Agency…
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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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Engaging complexity: Social Science Approaches to Green Building Design
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Publication Year:
2013
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Publication Year:
2013
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Robustness classification of materials, assemblies and buildings
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Publication Year:
2013
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Publication Year:
2013
Reliable methods are needed for classifying the robustness of buildings and building materials for many reasons, including ensuring that constructions can withstand the climate conditions resulting from global warming, which might be more severe than was assumed in an existing building’s design. Evaluating the robustness of buildings is also important for reducing process-induced building defects. We describe and demonstrate a flexible framework for classifying the robustness of building materials, building assemblies, and whole buildings that incorporates climate and service life considerations.
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Critical Sensible and Latent Effectiveness for Membrane Type Energy Recovery Ventilator (ERV) in Cold Climates
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Publication Year:
2013
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Publication Year:
2013
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Heat pump options for low energy office buildings in cold climate
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Publication Year:
2013
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Publication Year:
2013
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Navigating standards – constituting engineering practices – how do engineers in consulting environments deal with standards?
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Publication Year:
2013
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Publication Year:
2013
Standards and regulations can play a central role in policies to achieve environmentally sound and energy-efficient buildings. This paper sets out to explore how consulting engineers relate to standards designed to impose sustainability in the construction of new buildings and in waste management. The paper addresses four cases of engineering practices. The first case describes practical skills and tools involved in what the engineers considered as ‘normal’ practices when performing energy calculations in the development of new buildings. The second and third cases deal with energy in new buildings as well, but address practices that supported or enabled the engineers…
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Grønne vinduer
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Publication Year:
2014
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Publication Year:
2014
Vinduer ble lenge betraktet som energisluk i vinter-Norge. Men utstyrt med siste nytt fra forskningsfronten på feltet, kan kontorbygg forbruke mindre energi enn bygninger helt uten vinduer.
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Paraotwayite-Type α-Ni(OH)2 Nanowires: Structural, Optical and Electrochemical Properties
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Publication Year:
2013
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Publication Year:
2013
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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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