Publications
Vil bygge 800 miljøboliger, men fylkesmannen sier nei
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2012
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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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Fra energisluk til energiprodusent
Publication Year:
2013
Publication Year:
2013
Et ordinært kontorbygg fra 80-tallet skal skape mer energi enn det bruker.
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Energieffektivisering i bygninger. Forsknings- og demonstrasjonsaktiviteter med utgangspunkt i ZEB
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2013
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2013
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Smartere byer
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2013
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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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Moisture Robustness During Retrofitting of Timber Frame Walls with Vacuum Insulation Panels: Experimental and Theoretical Studies
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2013
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2013
The main purpose of this book, Hygrothermal, Building Pathology and Durability, is to provide a collection of recent research works to contribute to the systematization and dissemination of knowledge related to construction pathology, hygrothermal behaviour of buildings, durability and diagnostic techniques and, simultaneously, to show the most recent advances in this domain. It includes a set of new developments in the field of building physics and hygrothermal behaviour, durability approach for historical and old buildings and building pathology vs. durability. The book is divided in several chapters that are a resume of the current state of knowledge for benefit of…
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On the proper integration of wood stoves in passive houses: Investigation using detailed dynamic simulations
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2013
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2013
Wood stoves are attractive for the space-heating (SH) of passive houses. Nevertheless, there are still questions about their integration. Firstly, the power oversizing of the current stoves and their long operating time may lead to unacceptable overheating. Secondly, it is also unclear how one stove can ensure the thermal comfort in the entire building. The paper investigates these aspects using detailed dynamic simulations (TRNSYS) applied to a detached house in Belgium. An 8 kW stove is assumed to be representative of the lowest available powers in the market. Results confirm that a large power modulation is important to prevent overheating.…
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Journal papers
Thermal Conductivty of TiO2 Nanotubes
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2013
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2013
Thermal conductivity of TiO2 nanotubes prepared from a NaOH treatment of TiO2 particles with subsequent acid washing and annealing has been investigated. The obtained TiO2 nanotubes have a tetragonal anatase structure, and have a typical inner diameter of about 4-5 nm, wall thickness of about 2-3 nm, and length up to several hundred nanometers. TiO2 nanotubes show a significantly reduced thermal conductivity of about 0.40-0.84 W/(m·K) (average 0.62 W/(m.K)) at room temperature, as compared to about 8.5 W/(m·K) for the bulk TiO2 materials. The great suppression in thermal conductivity can be understood by means of increased phonon-boundary scattering and enhanced…
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Monodisperse Hollow Silica Nanospheres for Nano Insulation Materials: Synthesis, Characterization; and Pre-Life Cycle Assessment
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2013
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2013
The application of manufactured nanomaterials provides not only advantages resulting from their unique properties but also disadvantages derived from the high energy use and CO2 burden related to their manufacture, operation, and disposal. It is therefore important to understand the trade-offs of process economics of nanomaterial production and their associated environmental footprints in order to strengthen the existing advantages while counteracting disadvantages. This work reports the synthesis, characterization, and life cycle assessment (LCA) of a new type of superinsulating materials, nano insulation materials (NIMs), which are made of hollow silica nanospheres (HSNSs) and have great flexibility in modifying their properties by…
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Large-scale experimental wind-driven rain exposure investigations of building integrated photovoltaics
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2013
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2013
Building integrated photovoltaics (BIPVs) are photovoltaic materials that replace conventional building materials in parts of the building envelopes, such as roofs or facades, i.e. the BIPV system serves dual purposes, as both a building envelope material and a power generator. Hence, it is important to focus on the building envelope properties of a BIPV system in addition to energy generation performance when conducting experimental investigations of BIPVs. The aim of this work was to illustrate challenges linked to the building envelope properties of a BIPV system, and to develop and evaluate relevant methods for testing the building envelope properties of…
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“In the morning I just need a long, hot shower”. A sociological exploration of energy sensibilities in Norwegian bathrooms
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2013
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2013
This article proposes a new area of research centered on the study of how energy sensibilities—in terms of esthesia which is understood as responsiveness and awareness—are distributed and redistributed. Energy is approached as a polyphonic concept with many meanings, of which none enjoys privileged status. Given this polyphony, the common observation that end-users have no idea (or wrong ideas) about their energy consumption loses importance. Instead, unevenly distributed ways of sensing and making sense of energy become the object of study. Drawing on the work of French philosopher Jacques Rancière, the article discusses contemporary distributions of energy sensibilities in domestic…
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Sustainability assessment of nearly zero energy renovation of dwellings based on energy, economy and home quality indicators
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2013
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2013
A case study of a Norwegian detached house is used to evaluate the sustainability of two nearly zero energy renovation strategies. Energy demand, life cycle cost and home qualities are assessed as sustainability indicators. The Façade renovation strategy is an energy upgrade of the façade supplemented with high renewable energy production on site. The Ambitious renovation strategy is a total building envelope upgrade using passive house components and a lower on site renewable energy production. Both renovation strategies result in a 50–85% reduction of the heating requirement depending on the renewable energy production. The sustainability assessment was done as an…
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Cooling of PV panels by natural convection
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2013
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2013
Building Integrated Photovoltaic (BIPV) is an important source of renewable energy production for Zero Emission Buildings, even in Norwegian climate. In the planned Powerhouse 1 building at Brattøra in Trondheim the idea to reach a zero emission building level is to use PVs as a roofing material covering the entire roof. Challenges and questions raised in the design process of this building have motivated the work reported here.
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Reports
Beregning av kuldebroverider for golv på grunn
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2013
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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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Antireflection properties of monodisperse hollow silica nanospheres
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2013
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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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Core-shell typed Ag@SiO2 nanoparticles as solar selective coating materials
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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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2013
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2013
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Arkitektstudenter og plusshus. Nå lærer arkitektstudentene om plusshus
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2013
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2013
For første gang lærer arkitektstudenter å tegne hus som produserer energi. Artikkel i Teknisk Ukeblad, skrevet av Joachim Seehusen.
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Hvordan realisere regjeringens ambisjoner?
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2013
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2013
Er "intellegente byer" veien å gå? Siden nesten 2/3 av vårt energiforbruk er tilknyttet urbane miljø, vil såkalte "Smart Cities" eller intellegente byer spille en betydelig rolle vedrørende energiffektivitet.
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Hva er forskjellen på passivhus, nesten nullenergi, nullenergi og plussenergi/energipositivt?
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2013
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2013
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Powerhouse Kjørboe - rehabilitering av kontorbygg til plussenergibygg
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2013
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2013
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Nano insulation materials for energy efficient buildings: a case study on hallow silica naonspheres
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2012
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2012
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Books
Energy performance assessment of an advanced responsive multifunctional facade module: first results of an experimental campaign
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2012
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2012
Responsive Building Elements (RBEs) are technologies for the exploiting at the building scale renewable energy sources and the opportunities offered by the environment. Among the RBE concepts identified by the IEA-ECBCS Annex 44, Advanced Integrated Façades (AIFs) is probably one of the most promising technologies. Important players in the field of the façade have started to develop integrated modular façade systems (Multifunctional Façade Modules - MFMs), with a dynamic behaviour and interacting with the other building services, in order to reduce the building energy consumption and maximize the indoor comfort conditions. In the frame of a research activity aimed at…
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Conference papers
Marinlyst school – Comparison of simulated and measured energy use in a passive house school
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2012
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2012
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Performance evaluation of a combined solar-thermal and heat pump technology in a Net-ZEB under stochastic user-loads
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2012
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2012
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Brukerundersøkelse om innemiljø på Marienlyst skole
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2012
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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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Norsk byggebransje deltar nesten ikke i EUs forskning
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2012
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2012
Artikkel skrevet av Øyvind Aschehoug, prof.em. ved NTNU i Byggeindustrien
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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
Publication Year:
2012
Publication Year:
2012
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Unikt laboratorium baner veien mot nullutslipphuset
Publication Year:
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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Households on the Rebound. Factors Increasing and Decreasing Rebound Effects in Norwegian Households
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2012
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2012
This is a report on a study conducted in the spring of 2011 to examine the cultural and social conditions associated with rebound effects on the household level. The goal of the study was to conduct an empirical, qualitative exploration of the conditions that favour rebound effects. In economics, rebound effects are defined to occur when a measure intended to increase energy efficiency actually contributes to an increase of energy consumption. Examples of conditions that favour rebound effects include using heat pumps for cooling, leaving energy‐saving light bulbs on for longer periods or neglecting to shut them off entirely, or…
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Characterization of the optical properties of a PCM glazing system
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2012
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2012
The optical characteristics of an advanced glazing system are presented in this paper. The investigated glazing system is based on the incorporation of a paraffin-based Phase Change Material (PCM) into a transparent component, made of two extra-clear glass panes and a cavity where the PCM layer is placed. Due to the highly scattering property of the system (when the PCM is in solid state), the use of a large integrating sphere equipment (75 cm diameter) is necessary to obtain reliable results. The spectral transmission, reflection and absorption coefficients of the PCM glazing system are measured between 400 and 2000 nanometers,…
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Thermo-physical behaviour and energy performance assessment of PCM glazing system configurations: A numerical analysis
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2012
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2012
The adoption of Phase Change Materials (PCMs) in glazing systems was proposed to increase the heat capacity of the fenestration, being some PCMs partially transparent to visible radiation. The aim of the PCM glazing concept was to let (part) of the visible spectrum of the solar radiation enter the indoor environment, providing daylighting, while absorbing (the largest part of) the infrared radiation. In this paper, the influence of the PCM glazing configuration is investigated by means of numerical simulations carried out with a validated numerical model. Various triple glazing configurations, where one of the two cavities is filled with a…
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State-of-the-Art Building Integrated Photovoltaics
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2012
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2012
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The Path to the Building Integrated Photovoltaics of Tomorrow
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2012
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2012
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Accelerated Climate Aging of Building Materials and their Characterization by Fourier Transform Infrared Radiation Analysis
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2012
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2012
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Accelerated Climate Ageing of Building Materials, Components and Structures in the Laboratory
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2012
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2012
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Development of a Model for Radon Concentration in Indoor Air
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2012
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2012
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Investigations of Accelerated Climate Aged Wood Substrates by Fourier Transform Infrared Material Characterization
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2012
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2012
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Fourier Transform Infrared Radiation Spectroscopy Applied for Wood Rot Decay and Mould Fungi Growth Detection
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2012
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2012
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Innovative High Performance Thermal Building Insulation Materials - Today's State-of-the-Art and Beyond Tomorrow
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2012
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2012
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Retrofitting Timber Frame Walls with Vacuum Insulation Panels
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2012
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2012
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Unngå byggskader ved laboratorietesting av nye materialer og løsninger
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2012
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2012
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Flytende tregulv – Pass på avstanden!
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2012
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2012
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Small studies in architectural materiality
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2012
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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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Kan Powerhouse bli byggenæringens månelanding?
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2012
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2012
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Efficiency of the Hydronic System used for the Space-Heating of Passive Envelopes
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2012
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2012
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Multi-Functional Building Envelopes: Key Properties, State-of-the-Art Technologies and Visions for the Future
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2012
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2012
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