Recent Submissions

  • An Assessment of Ice Effects on Indices for Hydrological Alteration in Flow Regimes 

    Alfredsen, Knut (Journal article; Peer reviewed, 2017)
    Preserving hydrological variability is important when developing environmental flow regimes, and a number of tools have been developed to support this process. A commonly applied method is the index of hydrological alteration ...
  • The Visund office building, Haakonsvern, Bergen. As-built report 

    Sørensen, Åse Lekang; Mysen, Steinar Mads; Andresen, Inger; Hårklau, Bjarte; Lunde, Arild (ZEB Project report;, Research report, 2017)
    The Visund office building is a pilot project within the Research Centre on Zero Emission Buildings (ZEB) in Norway. The building has 2031 m2 of heated floor area and is located at Haakonsvern, about 15 km from the centre ...
  • Hot-Box measurements of highly insulated wall, roof and floor structures 

    Gullbrekken, Lars; Uvsløkk, Sivert; Kvande, Tore; Time, Berit (Journal article; Peer reviewed, 2016)
    The purpose of this study was to investigate how natural convection in air-permeable glass wool insulation affects the thermal transmittance in walls, roofs and floor structures. The results can be used to evaluate the ...
  • Lightweight and Thermally Insulating Aerogel Glass Materials 

    Gao, Tao; Jelle, Bjørn Petter; Gustavsen, Arild; He, Jianying (Journal article; Peer reviewed, 2014)
    Glass represents an important and widely used building material, and crucial aspects to be addressed include thermal conductivity, visible light transmittance, and weight for windows with improved energy efficiency. In ...
  • Aerogel Granulate Glazing Facades and their Application Potential from an Energy Saving Perspective 

    Ihara, Takeshi; Gao, Tao; Grynning, Steinar; Jelle, Bjørn Petter; Gustavsen, Arild (Journal article; Peer reviewed, 2015)
    Aerogel granulate glazing systems for energy efficient buildings have various promising properties, including their thermal insulation properties and translucent features. In this study, the energy performance of aerogel ...
  • Insulating Glazing Units with Silica Aerogel Granules: The Impact of Particle Size 

    Gao, Tao; Jelle, Bjørn Petter; Ihara, Takeshi; Gustavsen, Arild (Journal article; Peer reviewed, 2014)
    Innovative glazing units with improved thermal and optical performance are important for energy saving in buildings. In this work, light diffusing and thermally insulating aerogel glazing units (AGUs) have been assembled ...
  • Aerogel-Incorporated Concrete: An Experimental Study 

    Gao, Tao; Jelle, Bjørn Petter; Gustavsen, Arild; Jacobsen, Stefan (Journal article; Peer reviewed, 2014)
    Lightweight concrete can be prepared by replacing the normal aggregate of concrete, either partly or totally, with lightweight materials. In this work, by incorporating silica aerogel particles into concrete matrix, we ...
  • Core-shell-typed Ag@SiO2 Nanoparticles as Solar Selective Coating Materials 

    Gao, Tao; Jelle, Bjørn Petter; Gustavsen, Arild (Journal article; Peer reviewed, 2013)
    Silver (Ag) nanoparticles with typical diameter of about 50 nm have been prepared via a polyol process. The as-prepared Ag nanoparticles are well crystallized and exhibit a characteristic surface plasmon resonance (SPR) ...
  • Antireflection Properties of Monodisperse Hollow Silica Nanospheres 

    Gao, Tao; Jelle, Bjørn Petter; Gustavsen, Arild (Journal article; Peer reviewed, 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 ...
  • Paraotwayite-Type α-Ni(OH)2 Nanowires: Structural, Optical and Electrochemical Properties 

    Gao, Tao; Jelle, Bjørn Petter (Journal article; Peer reviewed, 2013)
    Paraotwayite-type nickel hydroxide [Ni(OH)2] nanowires with typical diameters of 20−30 nm and lengths up to several micrometers were prepared via a simple hydrothermal synthesis. The as-prepared nanowires had a mean ...
  • Monodisperse Hollow Silica Nanospheres for Nano Insulation Materials: Synthesis, Characterization, and Life Cycle Assessment 

    Gao, Tao; Jelle, Bjørn Petter; Sandberg, Linn Ingunn Christie; Gustavsen, Arild (Journal article; Peer reviewed, 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, ...
  • Perspective of Aerogel Glazings in Energy Efficient Buildings 

    Gao, Tao; Ihara, Takeshi; Grynning, Steinar; Jelle, Bjørn Petter; Lien, Anne Gunnarshaug (Journal article; Peer reviewed, 2016)
    The application perspective of aerogel glazings in energy efficient buildings has been discussed by evaluating their energy efficiency, process economics, and environmental impact. For such a purpose, prototype aerogel ...
  • Visible-Light-Driven Photochromism of Hexagonal Sodium Tungsten Bronze Nanorods 

    Gao, Tao; Jelle, Bjørn Petter (Journal article; Peer reviewed, 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 ...
  • Thermal Conductivity of TiO2 Nanotubes 

    Gao, Tao; Jelle, Bjørn Petter (Journal article; Peer reviewed, 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 ...
  • Silver Nanoparticles as Low-Emissivity Coating Materials 

    Gao, Tao; Jelle, Bjørn Petter (Journal article; Peer reviewed, 2017)
    The application potential of silver (Ag) nanoparticles as low-emissivity (low-e) coating materials has been discussed. Ag nanoparticles with an average diameter of about 50 nm were prepared via a wet-chemical method and ...
  • CFD Modeling of Local Scour Around a Pair of Tandem Cylinders under Wave Conditions 

    Ahmad, Nadeem; Bihs, Hans; Kamath, Arun; Arntsen, Øivind Asgeir (Journal article; Peer reviewed, 2015)
    Local scour in a marine environment can lead to the failure of offshore and coastal structures. This is also the case, when marine infrastructure is built in Arctic conditions. The knowledge and understanding of erosion ...
  • PPU i Veidekke - Et verktøy for økt produktivitet 

    Risstad, Magnus (Master thesis, 2017)
    Denne oppgaven er skrevet ved Institutt for bygg- og miljøteknikk, ved Fakultetet for Ingeniørvitenskap og teknologi ved Norges Teknisk-Naturvitenskapelige Universitet. NTNU. Masteroppgavens formål har vært å se om ...
  • The Determination of Heat Transfer Coefficient on Water-ice Surface in a Free Convection 

    Chen, Xiaodong; Høyland, Knut Vilhelm; Ji, Shunying (Journal article; Peer reviewed, 2017)
    In ice ridges consolidation, the convective heat flux term comes critical due to the larger contact areas and surface temperature differences compare with those from level ice. In this paper, a submerging experiment was ...
  • Climate Adaptation of School Buildings through MOM – A Case Study 

    Grynning, Steinar; Gaarder, Jørn Emil; Lohne, Jardar (Journal article; Peer reviewed, 2017)
    The aim of the study was to map routines and planning tools concerning climate adaptation measures in buildings based on an analysis of a case building. The case was used to assess the strategy and main challenges of ...
  • Urban water system metabolism assessment using WaterMet2 model 

    Behzadian, Kourosh; Kapelan, Zoran; Govindarajan, Venkatesh; Brattebø, Helge; Sægrov, Sveinung; Rozos, Envangelos; Makropoulos, Christos; Ugarelli, Rita Maria; Milina, Jadranka; Hem, Lars J. (Journal article; Peer reviewed, 2014)
    This paper presents a new “WaterMet2” model for integrated modelling of an urban water system (UWS). The model is able to quantify the principal water flows and other main fluxes in the UWS. The UWS in WaterMet2 is ...

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