Publications
Advanced control of heat pumps for improved flexibility of Net-ZEB towards the grid
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Publication Year:
2014
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Publication Year:
2014
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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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Reports
Sustainable refurbishment of Ellebo Housing Estate
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Publication Year:
2013
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Publication Year:
2013
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Reports
Materialer i energi- og klimaregnskapet - Hvor viktig er det?
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Publication Year:
2015
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Publication Year:
2015
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Conference presentations
Fenestration of Today and Tomorrow: A State-of-the-Art Review and Future Research Opportunities
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2011
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Publication Year:
2011
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Journal papers
Hollow silica nanospheres as a stepping-stone toward thermal superinsulation materials
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Publication Year:
2015
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Publication Year:
2015
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Conference papers
Towards zero emission buildings, settlements and cities. An introduction.
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2010
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Publication Year:
2010
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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
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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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The Skarpnes resisdential development
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Publication Year:
2012
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Publication Year:
2012
The zero-energy project Skarpnes residential development in Arendal in Norway consists of a total of 40 dwelling units. The energy goal of the buildings is net zero-energy on a yearly level. In addition, the greenhouse gas emissions (GHG) related to the operational energy of the buildings shall also be zero on an annual basis. There is also an aim achieving low embodied energy and GHG emissions related to the buildings materials and products. The thermal demand of the buildings will be covered by heat pumps and thermal solar collectors. To reach the zero energy/emission goal, the roofs are partly covered…
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Conference papers
Development of Nano Insulation Materials for Building Constructions
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Publication Year:
2015
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Publication Year:
2015
Abstract The application of superinsulation materials (SIM) reaching thermal conductivities far below 20 mW/(mK) allows the construction of relatively thin building envelopes while still maintaining a high thermal resistance, which also increases the architectural design possibilities for both new buildings and refurbishment of existing ones. To accomplish such a task without applying vacuum solutions and their inherit weaknesses may be possible from theoretical principles by utilizing the Knudsen effect for reduced thermal gas conductance in nanopores.This study presents the attempts to develop nano insulation materials (NIM) through the synthesis of hollow silica nanospheres (HSNS), indicating that HSNS may represent a promising candidate or stepping-stone for achieving SIM. Furthermore, initial…
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Conference papers
Future buildings – a response to the climate change
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Publication Year:
2011
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Publication Year:
2011
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Conference presentations
State-of-the-Art Building Integrated Photovoltaics
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Publication Year:
2012
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Publication Year:
2012
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Hvordan realisere regjeringens ambisjoner?
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Publication Year:
2013
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Publication Year:
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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Building integrated photovoltaic products: a state-of-the-art review and future research opportunities
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Publication Year:
2012
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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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Journal papers
Design of a Zero Energy Office Building at Haakonsvern
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Publication Year:
2012
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Publication Year:
2012
An office building of about 2000 m2 heated floor area is being designed for the Norwegian Defense Estates Agency (Forsvarsbygg). The building will be located at Haakonsvern, about 15 km from the centre of Bergen, Norway. The design aims at meeting the ZEB criterion of net zero energy balance for building operation during a year. The energy for operation of the plug loads (computers, printers, etc.) is not included in the balance.
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Conference papers
How is wood a part of the solution
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Publication Year:
2014
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Publication Year:
2014
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5 Zero Energy Dwellings at Skarpnes, Arendal
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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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Journal papers
Snart har vi solceller i taket og nano i veggen
Publication Year:
2015
Publication Year:
2015
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Media contributions
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
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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Journal papers
Nullutslippsbygg bidrar til grønt skifte
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Publication Year:
2016
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Publication Year:
2016
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Vindusløsninger ved energieffektivisering av eneboliger
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Publication Year:
2012
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Publication Year:
2012
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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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Reports
Net ZEB definition article – status
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Publication Year:
2011
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Publication Year:
2011
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Conference presentations
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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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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Conference papers
A Review of Materials Science Research Pathways and Opportunities for Building Integrated Photovoltaics
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Publication Year:
2016
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Publication Year:
2016
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Journal papers
Energiforsyning for bygning uten klimagassutslipp (ZEB) på Klimasenteret på Ringdalskogen
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Publication Year:
2013
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Publication Year:
2013
I dag har bygninger en andel på 30 % av verdens energiforbruk og står for 20 % av klimagassutslippene globalt sett. Regjeringen har derfor som mål å skjerpe energikravene i byggeteknisk forskrift til passivhusnivå i 2015 og nesten nullutslippsnivå i 2020. For å oppnå et bygg med nesten nullutslippsnivå vil bygget normalt være tilknyttet nettet. Dette på bakgrunn av at energien importert fra energinettet, til bygningen, er ansvarlig for visse utslipp. Eksport av fornybar energi fra bygningen tilbake til energinettet er ansvarlig for å unngå lignende utslipp av andre (ikke-fornybare) energivarer koblet til samme energinett.Brødrene Dahl ønsker å se på…
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Reports
Net zero energy builings: A consistent definition framework
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Publication Year:
2012
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Publication Year:
2012
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Journal papers
A net zero emission concept analysis of a single-family house
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Publication Year:
2014
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Publication Year:
2014
The paper aims to investigate whether it is possible to achieve a net Zero Emission Building (nZEB) by balancing emissions from the energy used for operation and embodied emissions from materials with those from on-site renewables in the cold climate of Norway. The residential nZEB concept is a so-called all-electric solution where essentially a well-insulated envelope is heated using a heat pump and where photovoltaic panels (PV) production is used to achieve the CO2eq balance. In addition, the main drivers for the emissions are revealed through the CO2eq calculation for a typical Norwegian, single-family house. This concept building provides a…
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Journal papers
Performance of a lab-scale membrane-based energy exchanger
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Publication Year:
2015
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Publication Year:
2015
Abstract Efficient energy recovery from used air with the goal of reducing energy use is important for realizing low energy houses. Rotary heat exchangers are very energy efficient, but have the drawback of transferring odours from exhaust air to fresh supply air. To avoid this, flat plate heat exchangers are commonly used where odour transfer might cause problems. Nevertheless, these may not properly handle water condensation and frost formation at low outdoor temperatures. The so-called membrane-based energy exchangers are an alternative to the flat plate heat exchanger. In a membrane-based exchanger, moisture is transferred from the humid exhaust air to…
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Journal papers
Thermal superinsulation for building applications – From concepts to experimental investigations
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Publication Year:
2014
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Publication Year:
2014
Abstract The application of traditional thermal insulation materials requires thicker building envelopes in order to satisfy the requirements of the emerging zero energy and zero emission buildings. This work summarizes the steps from the state-of-theart thermal insulation materials and solutions, like vacuum insulation panels (VIP), gas-filled panels (GFP) and aerogels which all have various drawbacks, to our concepts and experimental investigations for making superinsulation materials (SIM) like e.g. nano insulation materials (NIM).
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Journal papers
Forsvarsbygg inngår prosjekteringskontrakter
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2011
Publication Year:
2011
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Media contributions
Nanoelectrochromics for Smart Windows: Materials and Methodologies
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Publication Year:
2016
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Publication Year:
2016
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Conference papers
Nye isolasjonsmaterialer i verneverdige bygg – muligheter og begrensninger
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Publication Year:
2016
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Publication Year:
2016
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Conference presentations
Passivhus – Utfordringer for byggebransjen
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Publication Year:
2010
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Publication Year:
2010
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Fremtidige krav til utforming av bærekraftige bygninger og energiforsyning
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Publication Year:
2015
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Publication Year:
2015
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ByBo vil bygge 800 nullutslippsboliger i Bergen
Publication Year:
2015
Publication Year:
2015
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Media contributions
Zero Emission Buildings – examples and research challenges
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Publication Year:
2014
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Publication Year:
2014
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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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Zero Emission Buildings – fra forskning til praksis – Nye muligheter med Living Lab og Test cell – Erfaringer fra demonstrasjonsbyggene
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Publication Year:
2015
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Publication Year:
2015
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Design phase calculation of greenhouse gas emissions for a zero-emission residential pilot building
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Publication Year:
2016
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Publication Year:
2016
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Hvordan anser markedet denne type bygg?
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Publication Year:
2013
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Publication Year:
2013
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Effective ventilation in high performance buildings
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Publication Year:
2015
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Publication Year:
2015
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The Thermal Performance of Wall-Integrated Phase Change Material Panels – Hot Box Experiments
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Publication Year:
2010
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Publication Year:
2010
Phase change materials (PCMs) have opened a new door towards the renewable energy future due to their effective thermal energy storage capabilities. Several products have recently found their way to the market, using various types of PCMs. This paper focuses on one particular wall-board product, integrated in a well-insulated wall constructed of an interior gypsum board, PCM layer, vapor barrier, mineral wool, and a wind barrier. The wall is tested with and without the PCM layer in order to get comparative results. Experiments are conducted in a traditional guarded hot box. The hot box is composed of two full-scale test…
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