Publications
Heat and Mass Transfer in Quasi-Counter Flow Membrane-Based Total Heat Exchanger, Membrane Study
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2012
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2012
Realisation of Net Zero Energy Buildings (NZEB) for residential use depends on, among many other things, minimizing air leakages. However, very airtight houses will have an increased risk for problems regarding indoor humidity, thermal comfort and indoor air quality. Focusing on ventilation systems becomes a requirement in this situation. For cold climates, mechanical ventilation systems are the state of the art solution and in order to achieve a further reduction in energy use, the focus must be on efficient energy recovery. This paper focuses on a quasi-counter flow membrane-based heat and moisture recovery system for cold climates such as the…
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Conference papers
Performance of 8 Cold-Climate Envelopes for Passive Houses
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2012
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2012
While the design and construction of envelopes for Passive House certified homes in central European climates is well developed and has achieved widespread acceptance and reliability, the same cannot be said in colder climate regions such as the United States’ upper Midwest (DOE climate zones 6 and 7) and Scandinavia. The objective of this research was to study some of the typical building performance issues relating to Passive House envelope construction for single family homes in cold climates by testing and developing a group of 8 envelope options. Typical issues include unfamiliarity with performance of thermal bridge details, added embodied…
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Energy Desing of Sandwich Masonry Blocks
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2012
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2012
Sandwich elements are widely used in the building envelope, in walls and foundations in particular. The thickness of sandwich elements is increasing as the demand for reduced heat loss from the building envelope is required. The building industry is searching for means and alternative materials to reduce the volume of the building envelope, but at the same time obtain the same thermal performance. Sandwich element constructions might be suitable for highly effective insulation materials as VIPs (Vacuum Insulation Panels). The possibilities of optimizing the thermal performance and by the same time decreasing the thickness and reducing the volume of aggregated…
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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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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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Conference papers
Powerhouse One: the first plus-energy commercial building in Norway
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2012
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2012
“Powerhouse” is an alliance that will demonstrate that it is possible to build plus-energy buildings in cold climates, such as in Norway. For the Powerhouse project in Trondheim (Brattørkaia 17a), PV panels will produce and offset the delivered energy needed during the operation and for compensating the embodied energy of the building. The building will thus export more electricity than it will use for operation. In a broader environmental perspective, an aim of this project is also to achieve the classification “Outstanding” in the BREEAM-NOR environmental certification scheme. Energy efficiency measures and materials with low embodied energy have been crucial…
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Conference papers
The Skarpnes resisdential development
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2012
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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
Design of a Zero Energy Office Building at Haakonsvern
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2012
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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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From Passive House to Zero Emission Buildings from an Emission-Accounting Perspective
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2012
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2012
Moving away from the annual energy budget and including the emissions of the entire building lifetime during construction, operation, and disposal is a key aspect of ZEB. This can be summarised in an emission inventory of operation and building components and services. The aim of this paper is to investigate the emission balance of both operational and the embodied energy in different highly energy efficient buildings concepts which are worth considering toward achieving Zero emission buildings. In this work four concepts for energy efficient buildings are identified which could provide stepping stones towards a definition of ZEB. These concepts were…
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Conference papers
Sammenligning av klimagass-utslipp med naturlig- og balansert ventilasjon
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2012
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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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Conference papers
Possibilites for characterization of a pcm window system large scale measurements
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2012
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2012
The introduction of dynamic envelope components and systems can have a significant reduction effect on heating and cooling demands. In addition, it can contribute to reduce the energy demand for artificial lighting by better utilization of the daylight. One of these promising technologies is Phase Change Materials (PCM). Here, the latent heat storage potential of the transition between solid and liquid state of a material is exploited to increase the thermal mass of the component. A PCM layer incorporated in a transparent component can increase the possibilities to harvest energy from solar radiation by reducing the heating/cooling demand and still…
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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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2012
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2012
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Conference presentations
The History of the Passive House Concept and Standard: How a voluntary standard managed to bridge the energy efficiency gap
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2012
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2012
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Conference presentations
Evaluation of load matching and grid interaction index of a Norwegian all-electrical Net-ZEB under stochastic user loads
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2012
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2012
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Conference presentations
On the integration of wood stoves for the space-heating of passive houses: Assessment using dynamic simulation
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2012
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2012
State-of-the-art wood stoves could be an attractive solution for the space heating of passive houses. The question of the integration of wood stoves in passive envelopes is rather new and still open, the main constraints being the power oversizing ant the heat distribution. The paper proposes a low-resolution simulation approach to provide an insight into the whole-year thermal comfort using a stove, and into the relative effect of the large number of physical parameters involved in the problem. In particular, a simple stove model is developed for detailed dynamic simulations in order to fairly represent the heat emission properties of…
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Conference presentations
Influence of user-behavior on the performance of the building and the energy supply system
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2012
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2012
It is becoming conventional approach to evaluate the building envelop losses using detailed dynamic tools such as EnergyPlus, ESP-r and TRNSYS. However, the user-related loads (and their variations) in the building are usually oversimplified during performance evaluation of those buildings and associated HV AC systems. This paper presents a methodology to evaluate the performance of buildings and their energy supply systems while taking into account the user-related loads (non-HV AC & DHW) at individual household levels. For this purpose, a single family house (two different insulation cases) built in Oslo climate using an alternate duty air to water heat pump…
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Form følger miljø-konseptet og løsninger for verdens nordligste energipositive næringsbygg
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2012
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2012
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Conference presentations
Sustainability transitions outside the modernization paradigm. Gains and losses
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2012
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2012
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Conference presentations
Impact on thermal comfort of conventional and advanced glazed façades in office buildings
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2012
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2012
Transparent façades are often used to increase the aesthetic value of the building and to provide visual contact with the outdoor. However, together with several positive features, it should be mentioned that glass façades may reduce the quality of the indoor thermal environment, causing thermal discomfort especially due to overheating in the summer season. The aim of this paper is to compare the implications on thermal comfort of different glazed façades, whose surface temperatures have been monitored during several experimental campaigns. The analyzed glazing systems were double skin façades and non conventional single skin façades integrating different materials (i.e. phase…
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Conference papers
Experimental Assessment of the Energy Performance of an Advanced Responsive Multifunctional Facade Module
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2012
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2012
Responsive Building Elements (RBEs) and energy storage within the building are considered as a crucial development towards the nearly Zero Energy/Emission Building target. The exploitation at the building scale of renewable energy sources and the opportunities offered by the environment is achieved by the ability of the RBEs to dynamically adapt to changing environmental conditions. Among these concepts, Advanced Integrated Façades (AIFs) are probably one the most promising technologies, due to the important role that the building envelope plays in controlling the energy and mass flows between the building and the outdoor environment. In the framework of a decade-long research…
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Conference papers
Review of Air-to-Air Heat/Energy Exchangers for Use in NZEBs in the Nordic Countries
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2012
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2012
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Journal papers
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
Nano insulation materials for energy efficient buildings: from theory to practice
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2012
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2012
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Conference papers
The legal dwelling: the interface between buildings researches and construction law in Norway.
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2012
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2012
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Conference presentations
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
A numerical model to evaluate the thermal behaviour of PCM glazing systems
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2012
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2012
The adoption of Phase Change Materials (PCMs) in building components is an up-to-date topic and a relevant number of research activities on this issue are currently on the way. A particular application of PCMs in the building envelope focuses on the integration of such a kind of material into transparent envelope components. A numerical model that describes the thermo-physical behaviour of a PCM layer in combination with other transparent materials (i.e. glass panes) has been developed to perform numerical analyses on various PCM glazing systems configurations. The paper illustrates the structure of the model, the main equations implemented and the…
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Conference papers
FM-departments and central control and monitoring systems
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2012
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2012
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Conference presentations
Investigation of the thermal properties and heat-storage reliability of a paraffin wax for LHTES application under direct solar radiation
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2012
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2012
In recent years, Thermal Energy Storage (TES) is becoming more and more important in different engineering applications. As far as the building sector is concerned, TES is considered a crucial feature to reach the net-Zero Energy Building (nZEB) goal. Commonly, TES in building is obtained using the sensible heat property of conventional building materials (building thermal inertia). The drawbacks of this strategy are: the low amount of thermal energy that can be stored; the overheating of the indoor environment that may occur if elevate amount of heat is collected by a conventional building material. On the contrary, the exploitation of…
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Conference papers
Optimal transparent percentage in façade modules for office buildings in a central Europe climate: a case study in Frankfurt
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2012
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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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Conference papers
Integrated energy design – the architectural approach
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2012
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2012
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Conference presentations
State-of-the-Art Building Integrated Photovoltaics
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2012
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2012
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Conference presentations
On the proper integration of wood stoves in passive houses: investigation using dynamic simulations
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2012
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2012
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Conference presentations
Influence of stochastic loads on the performance of energy system in Net-ZEB
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2012
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2012
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Conference presentations
The Path to the Building Integrated Photovoltaics of Tomorrow
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2012
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2012
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Performance estimation and documentation of an integrated energy supply solution
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2012
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2012
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Conference presentations
Experimental Fabrication and Characterization of Hollow Nano Insulation Material Spheres for Application as a Thermal Building Insulation Material
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2012
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2012
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Conference presentations
Life Cycle Cost Perspectives on Zero Energy Renovation of a Single Family House
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2012
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2012
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Conference presentations
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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Conference papers
Retrofitting Timber Frame Walls with Vacuum Insulation Panels
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2012
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2012
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Conference papers
Retrofitting Timber Frame Walls with Vacuum Insulation Panels
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2012
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2012
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Conference presentations
Impacts of Operating Hardware on Window Thermal Performance
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2012
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2012
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High Performance Thermal Building Insulation: Today's State of the Art
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2012
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2012
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Conference presentations
Energy culture in the comfort society
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2012
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2012
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Conference presentations
Kicking the habit. What happens after people have decided to invest in energy efficient technologies?
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2012
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2012
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Conference presentations
Rehabilitering av boligblokk med ZEB-ambisjoner
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2012
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2012
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Conference presentations
High performance building services in Zero Emission Buildings – do all the electrical gadgets really save energy?
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2011
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2011
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Norwegian National Centre for Environmentfriendly Energy Research: Zero Emission Buildings (ZEB)
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2011
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2011
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Understanding Net Zero Energy Buildings: Evaluation of load matching and grid interaction indicators
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2011
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2011
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