Publications
Improving the interaction between Net-ZEB and the grid using advanced control of heat pumps
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2013
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2013
Design principles in Net-ZEB considers the local energy infrastructure as virtual storage leading to large amount of energy exchange with the grid. Nonetheless, with high Net-ZEB penetration scenarios, such exchange could compromise the effectiveness of Net- ZEB concept in a total energy infrastructure. As the current market trends, heat pumps along with photovoltaics are seen as an emerging energy supply solutions in Net-ZEB buildings, effectiveness of an all-electric Net-ZEB (that is using air-to-water heat pump with photovoltaic) is analysed. Two concrete control cases of energy storage (compared to reference case) to assess Net-ZEB ability to self-consume vs. grid empowerment are…
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Rehabmarkedet er enormt - og uutnyttet
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2013
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2013
Alt som skal til for å rehabilitere eldre eneboliger til moderne energistandarder er tilgjengelig. Men kundene skygger unna. Artikkel skrevet av Joachim Seehusen
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Visible-Light Driven Photochromism of Hexagonal Sodium Tungsten Bronze Nanorods
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2013
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2013
Single-crystalline sodium tungsten bronze (Na-WO3) nanorods with typical diameters of 10−200 nm and lengths of several micrometers were prepared via hydrothermal synthesis. The as-prepared Na-WO3 nanorods crystallized in a hexagonal structure (space group P6/mmm) with unit cell parameters a=7.3166(8) Å and c= 3.8990(8) Å and elongated along the ⟨001⟩direction. Chemical analyses indicated a stoichiometry of Na0.18WO3.09·0.5H2O, revealing the existence of tunnel Na+ ions and water molecules in the structure, as confirmed also by the vibrational spectroscopic study. The as-prepared Na-WO3 nanorods exhibited a direct-allowed electronic transition with band-gap energy of about 2.5 eV, which allows a visible-light-driven photochromism related to…
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Analysis of the air heating in Norwegian passive houses using detailed dynamic simulations
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2013
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2013
The passive house (PH) standard is seen as the future minimal requirement for buildings in Norway, where a specific definition has been developed (NS 3700). Nevertheless, the relation between this standard and air heating (AH) is not clear while both concepts are often associated. The present contribution investigates challenges for AH in terms of thermal dynamics (e.g. temperature distribution and control) as well as the feasibility of the AH concept. This is done using detailed dynamic simulations on a typical detached house typology. Results show some limitations of the AH concept in Nordic countries, as well as provide guidelines for…
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Gode skussmål til nullutslippsatsing
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2013
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2013
Zeb, forskningssenteret for nullutslippsbygg ved NTNU er sikret ny treårskontrakt med Forskningsrådet. Det er klart etter at senteret kommer svært godt ut av en fersk midtveisevaluering. Artikkelen er skrevet av Sølvi Waterloo Normannsen
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Partnering for the development of an energy-positive buildings. Case study of Powerhouse #1
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2013
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2013
Powerhouse #1 is planned to become the first and northernmost energy-positive office building. An alliance of companies within the Norwegian construction industry has been established to reach this ambition. Partnering has been suggested as a means to improve performance in general within the construction industry. Studies reveal that the industry is yet to yield the positive effects that have occurred in other industries. Strategic alliances such as Powerhouse are an exception within Norwegian construction industry. The paper analyses the case of Powerhouse #1 regarding collaborative working and experienced effects to the energy performance of the project. The material consists of…
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Sustainable Facade Renovation. Using Dynamic Performance Simulations
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2013
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2013
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Impact on architectural quality, daylighting and thermal performance of different atria in renovation project
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2013
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2013
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Renovation of an office buildings in Bergen: architectural and daylighting design as a tool for energy efficiency
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2013
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2013
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Artium Design in Office Buildings. An evaluation of how artium design influences the daylight availability
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2013
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2013
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Sustainable refurbishment of Ellebo Housing Estate
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2013
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2013
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Evaluering av energibruk i passivhus studentboliger
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2013
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2013
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Passive House at the crossroads: The past and the present of a voluntary standard that managed to bridge the energy efficiency gap
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2013
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2013
Improving energy efficiency in dwellings is generally seen as the low-hanging fruit of climate change mitigation. In particular decreased heat loss through better insulation is suggested as one of the most cost-effective means to achieve the ambitious national and international goals of climate gas reduction. However, the literature shows that a profitable technological solution is not sufficient to reach the energy goals. Aspects such as a lack of information, unobserved costs, and heterogeneity among users can compromise the success of technical innovation. Still, there are successful concepts that drive the technological development in the construction sector. The Passive House is…
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A net zero emission concept analysis of a Norwegian single family house - A CO2 accounting method.
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2013
Publication Year:
2013
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Towards LCA building automation and control systems in zero emission buildings - Measuremets of auxiliary energy to operate a KNX bus-system
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2013
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2013
The demands for both thermal comfort and reduced energy consumption in buildings have become a major driving force for the increased use of advanced building automation and control systems (BACS). In the on-going development of Zero Emission Buildings (ZEBs), it seems to be a common understanding that such systems are needed in order to save energy and reach the zero emission goals, and that energy consumption for their operation is negligible compared to the building needs and the energy saving potential BACS causes. However, sensors and actuators in automation and control systems require electricity to operate, and both the environmental…
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Energiforsyningsløsninger for lavenergi yrkesbygg i Norge
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2012
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2012
Master i energi og miljø
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Synthesis and Characterization of Sodium Tungsten Bronse Nanorods for Electrochromic Smart Window Applications
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2013
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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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Kan Powerhouse bli byggenæringens månelanding?
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2012
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2012
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State-of-the-Art Analysis of Nearly Zero Energy Buildings. Country Report IEA HPP Annex 40 Task 1 - Norway
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2013
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2013
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Energy payback: An attributional and environmentally focused approach to energy balance in net zero energy buildings
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2013
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2013
Net zero energy buildings (nZEBs) are understood as grid-connected buildings which do not require net inputs of non-renewable energy over a defined period of their life cycle. Energy requirements of nZEBs have until now been assessed based on the impact buildings have on the existing energy system. This paper introduces a new approach to nZEB energy balance that takes into account the actual amount of energy nZEBs require. Energy balance methods previously proposed for nZEBs are illustrated in a new way and expressed in a series of equations based on a common terminology. Taking a different standpoint on the very…
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Optimizing the configuration of a facade module for office buildings by means of integrated thermal and lighting simulations in a total energy perspective
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2013
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2013
The building enclosure plays a relevant role in the management of the energy flows in buildings and in the exploitation of solar energy at a 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 artificial lighting energy demand is often not addressed. A comprehensive approach (i.e. including heating, cooling and artificial lighting energy demand) is instead necessary to reduce the total energy…
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Annual Report 2012
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2013
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2013
The Research Centre on Zero Emission Buildings - Annual Report 2012
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Industrial Ecology and Nantotechnology
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2013
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2013
På Nanonkonferansen 18. mars 2013 var det speeddating med nanoforskere, som på 1 minutt presenterte nytt fra forskningsfronten. Klima- og forurensningsdirektoratet (Klif) og Forskningsrådet arrangerte konferansen for å belyse mulighetene og utfordringene som ligger i nanoteknologien.
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Grønt lys for ZEB
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2013
Publication Year:
2013
Forskning på nullutslippsbygg har fått gode resultater i Forskningsrådets evaluering, og ZEB får fortsette driften og forskningen i samme spor.
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Rehabilitering av eneboliger
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2013
Publication Year:
2013
Eneboliger kan nesten bli nullenergibygg, men kundene skygger unna. Skrevet av Joachim Seehusen
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What can we learn from case study buildings?
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2013
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2013
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Energy Supply Solution for Low-Energy Commercial Buildings in Cold Climates
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2013
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2013
The aim of the study was to define an energy supply solutions for a low-energy commercial building in cold climates. A new low-energy office building built with high quality building insulation better than the Norwegian passive building standard was analyzed by using EnergyPlus. The results showed that the heat pump solutions could be used to cover the building base load, while the peak load should be covered by additional energy sources. Due to a high indoor temperature caused by the high quality building insulation standard, an increase in ventilation air flow was necessary during the summer. To fully utilize the…
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ZEB får fortsette
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2013
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2013
Forskningsrådet gir ZEB ved NTNU gode tilbakemeldinger, og som ett av tre sentre får ZEB ny treårskontrakt og grønt lys for å fortsette både driften og forskningen i samme spor som de fire første leveårene.
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Norske boliger råtner på rot
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2013
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2013
Vi bruker milliarder på estetiske oppgraderinger og praktiske løsninger, men mangler kunksap o lønnsom bruk av oppussingskronene. Artikkelen er skrevet av Marit Tronier Halvorsen, Oslo
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Nytt og lavere powerhouse på Brattøra
Publication Year:
2013
Publication Year:
2013
Statlige Entra fremmer et nytt powerhouse-prosjekt på Brattøra. Noe mindre enn det forrige, men likevel tolv meter høyere enn tillatt i reguleringsbestemmelsene. Artikkelen er skrevet av Hermann Hansen
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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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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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2013
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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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2012
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2012
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Towards LCA of building automation and control system in zero emission buildings – measurements of auxiliary energy to operate a KNX BUS-system
Authors:
Publication Year:
2013
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Publication Year:
2013
The demands for both thermal comfort and reduced energy consumption in buildings have become a major driving force for the increased use of advanced building automation and control systems (BACS). In the on-going development of Zero Emission Buildings (ZEBs), it seems to be a common understanding that such systems are needed in order to save energy and reach the zero emission goals, and that energy consumption for their operation is negligible compared to the building needs and the energy saving potential BACS causes. However, sensors and actuators in automation and control systems require electricity to operate, and both the environmental…
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Measurements and Simulations of Airborne Moisture Transport in Bathrooms
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2013
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2013
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Frame Stability of Tunnel-Structured Cryptomelane Nanofibers: The Role of Tunnel Cations
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2013
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2013
The role of tunnel K+ ions on the growth and stability of tunnel-structured cryptomelane-type MnO2 nanofibers (denoted as cryptomelane nanofibers hereafter) has been discussed by means of X-ray diffraction and electron microscopy. Cryptomelane nanofibers with typical diameters of 20–80 nm and lengths of 1–6 μm have been synthesized by means of a simple hydrothermal reaction of KMnO4 and MnSO4 aqueous solutions at 140 °C. The growth of cryptomelane nanofibers under hydrothermal conditions follows a dissolution–recrystallization process and involves a morphological transformation from a layered precursor to the tunnel-structured cryptomelane, in which the K+ ions play important roles in templating and…
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Three scenarios for the future of sustainable engineering in the built environment
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2013
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2013
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Energy Performance Assessment of Advanced Integrated Facades by Means of Synthetic Metrics
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2013
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2013
Façades play an important role in architecture, with deep implications in both the quality of the indoor environment and the appearance of the building. R&D in the field of energy conservation is moving toward advanced integrated façades (AIFs): these are innovative and dynamic façades deeply connected with the building equipment. Their dynamic features allow the energy performance of the façade to be optimized, adapting its behavior to different boundary conditions. The substantial lack of synthetic performance parameters to assess and to characterize the energy performance of AIFs is one of the main limitations to the widespread of these technologies. This…
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Navigating standards – constituting engineering practices – how do engineers in consulting environments deal with standards?
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2013
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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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Heat pump options for low energy office buildings in cold climate
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2013
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2013
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Experimental Pathways for Achieving Superinsulation through Nano Insulation Materials
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2013
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2013
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Interior Insulation Retrofit of a Brick Wall Using Vacuum Insulation Panels: Design of a Laboratory Study to Determine the Hygrothermal Effect on Existing Structure and Wooden Beam Ends
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2013
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2013
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The first phase of a Zero Emission Concept for an Office Building in Norway
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2013
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2013
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