Recent Submissions

  • CHARCOAL PRODUCTION FROM FOREST RESIDUES 

    Wang, Liang; Higashi, Charissa; Skreiberg, Øyvind; Grønli, Morten; Antal, Michael Jerry (Journal article; Peer reviewed, 2015)
    The carbonization behaviors of spruce wood and its forest residue at different conditions were studied in this work. A standard proximateanalysis procedure delivered the lowest charcoaland fixed-carbon yields. Sample ...
  • COMBUSTION CHARACTERISTICS OF BIOMASS CHARCOAL PRODUCED AT DIFFERENT CARBONIZATION CONDITIONS 

    Wang, Liang; Várhegyi, Gabor; Skreiberg, Øyvind; Grønli, Morten; Antal, Michael Jerry (Journal article; Peer reviewed, 2015)
    The combustion properties of spruce chars and spruce forest residue chars were studied in the kinetic regime by a series of TGA experiments. The work aimed at establishing how the pressure of the char preparation affects ...
  • EFFECT OF STORAGE TIME AND CONDITIONS ON BIOMASS CHARCOAL PROPERTIES 

    Wang, Liang; Hu, Kathryn; Higashi, Charissa; Skreiberg, Øyvind; Myrvågnes, Viktor; Grønli, Morten; Antal, Michael Jerry; Várhegyi, Gábor (Journal article; Peer reviewed, 2015)
    In this work, effects of storage time and conditions on the properties of one woody charcoal were studied. Analyses results showed that the volatile matter content of the charcoal samples collected from the bottom section ...
  • CO2 reactivity assessment of woody biomass biocarbons for metallurgical purposes 

    Wang, Liang; Hovd, Benedicte; Bui, Hau-Huu; Valderhaug, Aasgeir Mikael; Videm Buø, Therese; Birkeland, Rolf Gunnar; Skreiberg, Øyvind; Tran, Khanh-Quang (Journal article; Peer reviewed, 2016)
    Replacing the use of fossil reductants with biocarbons in metallurgical industries has a great potential with respect to reducing CO2 emissions and the contribution from this industry to the increasing greenhouse gas effect. ...
  • Creep of geomaterials – some finding from the EU project CREEP 

    Grimstad, Gustav; Karstunen, Minna; Jostad, Hans Petter; Sivasithamparam, Nallathamby; Mehli, Magne; Zwanenburg, Cor; Evert, den Haan; Ghoreishian Amiri, Seyed Ali; Boumezerane, Djamalddine; Kadivar, Mehdi; Haji Ashrafi, Mohammad Ali; Rønningen, Jon A. (Journal article; Peer reviewed, 2017)
    This paper gives a summary of some of the main findings of the EU founded project “Creep of geomaterials”, CREEP. CREEP was an Industry-Academia Partnerships and Pathways (IAPP) project funded from the 7th Framework Programme ...
  • Numerical Study of Hydrogen Inhibition of Char Gasification Using Detailed Hetero- and Homogeneous Chemical Kinetics 

    Lazar, Joanna; Haugen, Nils Erland L; Krüger, Jonas; Szlek, Andrzej (Journal article; Peer reviewed, 2016)
    It has been known for a long time that hydrogen in the gas phase tends to inhibit gasification of char at low and intermediate temperatures. At higher temperatures, however, there are indications that hydrogen may speed ...
  • A macro model for shallow foundations on granular soils describing non-linear foundation behavior 

    Tistel, Joar; Grimstad, Gustav; Eiksund, Gudmund Reidar (Journal article; Peer reviewed, 2017)
    This paper describes a macro model for a shallow foundation. The macro model represents the non-linear soil structure interaction (SSI) exemplified by a suspension bridge anchor-block. The model can be adjusted and used ...
  • Maintenance strategies for deep sea offshore wind turbines 

    Utne, Ingrid Bouwer (Journal article; Peer reviewed, 2010)
    Purpose – The objective of this paper is to outline a framework that guides the development of sound maintenance strategies and policies for deep‐sea offshore wind turbines. Design/methodology/approach – An important ...
  • Virtual prototyping for maritime crane design and operations 

    Chu, Yingguang; Hatledal, Lars Ivar; Zhang, Houxiang; Æsøy, Vilmar; Ehlers, Sören (Journal article; Peer reviewed, 2018)
    This paper presents the implementation of the virtual prototyping system for maritime crane design and operations. The study is designed to bridge the following gaps in maritime crane system simulations. First, the virtual ...
  • Integrated multi-domain system modelling and simulation for offshore crane operations 

    Chu, Yingguang; Æsøy, Vilmar; Ehlers, Sören; Zhang, Houxiang (Journal article; Peer reviewed, 2015)
    Advanced offshore machinery, such as an offshore crane, usually involves several energy domains. Modelling and simulation of multi-domain systems is challenging because of not only the complexity in modelling of the related ...
  • Virtual prototyping system for maritime crane design and operation based on functional mock-up interface 

    Chu, Yingguang; Hatledal, Lars Ivar; Sanfilippo, Filippo; Æsøy, Vilmar; Zhang, Houxiang; Schaathun, Hans Georg (Chapter; Peer reviewed, 2015)
    This paper presents the framework of a virtual prototyping system for the design and simulation of maritime crane operations. By combining the rapid-prototyping approach with the concept of interchangeable interfaces, ...
  • Enhancement of virtual simulator for marine crane operations via haptic device with force feedback 

    Chu, Yingguang; Zhang, Houxiang; Wang, Wei (Journal article; Peer reviewed, 2016)
    This paper presents simulations of marine crane operations using a haptic device with force feedback. Safe and efficient marine crane operations are challenging under adverse environmental conditions. System testing and ...
  • Numerical Analyses of Moment Resisting Beam-to-Column Connections in Timber Structures 

    Hoff, Torbjørn Hadland; Drageset, Anders Fristad (Master thesis, 2017)
    This Master thesis is a continuation of an ongoing study of connections in timber structures with the use of long threaded rods as fasteners. As a part of the research project Wood frame solutions for free space design in ...
  • Numerical modelling of downstream-migrating antidunes 

    Olsen, Nils Reidar Bøe (Journal article; Peer reviewed, 2017)
    A numerical model is presented that compute the geometrical dimensions and movement of downstream migrating antidunes. The model solves the Navier–Stokes equations together with the k-epsilon turbulence model to find the ...
  • Prosjektering av en nettverksbuebro i tre 

    Bast, Magnus Wilhelm; Tveter, Jonas Emil (Master thesis, 2017)
    Denne masteroppgaven ser på prosjektering av nettverksbuebro i limtre. Hovedfokus vil være stabilitet, kostnadsestimering og gjennomføring. Broens spenn vil være på 50 meter og skal prosjekteres uten vindfagverk og strekkbånd.
  • Full waveform inversion and wave equation migration using 4D seismic from the Sleipner Field - A CO2-monitoring study 

    Bjøringsøy, Amanda Nagypal (Master thesis, 2017)
    In this study, two surveys from the Sleipner field in the North Sea are investigated. The surveys cover the same area, but are acquired at different times - respectively before and after the initiation of CO2 injection. ...
  • Quantitative interpretation using inverse rock-physics modeling on AVO data 

    Jensen, Erling Hugo; Johansen, Tor Arne; Avseth, Per Åge; Bredesen, Kenneth (Journal article; Peer reviewed, 2016)
    Quantitative seismic interpretation has become an important and critical technology for improved hydrocarbon exploration and production. However, this is typically a resource-demanding process that requires information ...
  • Climate change mitigation potential of Norwegian households and the rebound effect 

    Bjelle, Eivind Lekve; Steen-Olsen, Kjartan; Wood, Richard (Journal article; Peer reviewed, 2018)
    An increasing number of studies show that efficiency improvements alone will not be sufficient to attain the substantial emission reductions needed to mitigate global warming to a target of 2 °C. Consumption side changes ...
  • Analysis of loads, motions and cavity dynamics during freefall wedges vertically entering the water surface 

    Wang, Jingbo; Lugni, Claudio; Faltinsen, Odd Magnus (Journal article; Peer reviewed, 2015)
    In this paper, theoretical models are developed and numerical methods are used to analyze the loads, motions and cavity dynamics for freefall wedges with different deadrise angles vertically entering the water surface at ...
  • Experimental detection of forming limit strains on samples with multiple local necks 

    Vysochinskiy, Dmitry; Coudert, Térence; Hopperstad, Odd Sture; Lademo, Odd-Geir; Reyes, Aase Gavina Roberg (Journal article; Peer reviewed, 2016)
    Sheet metal formability is traditionally described by the forming limit curve (FLC). Experimental FLCs are obtained by performing formability tests and determining failure strains. The strains are usually measured either ...

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