Recent additions

  • Evaluation of cascaded MPC performance in voltage source converters 

    Mokrushev, Ivan (Master thesis; Mastergradsoppgave, 2018-08-21)
    Model predictive control method becomes more popular in research over the last decade. Due to the growing popularity of the model predictive control concept, there are more and more questions about the effectiveness of this method in comparison with other methods. In this thesis cascaded model predictive control of grid connected voltage source converter with LCL filter has been evaluated. The ...
  • Study of area use and floor space occupation in office buildings using ML approach 

    Heidari, Fatemeh (Master thesis; Mastergradsoppgave, 2018-08-16)
    This thesis presents a general model to estimate the number of people at office spaces in the given time step. This project represents the description of the several approaches for similar problems, general description of statistical and machine learning models and applying those models for specific building. This work is also cover some suggested dashboards to keep track of space usage. The flowing ...
  • Transient analysis of road tunnel power system 

    Ivanova, Elizaveta (Master thesis; Mastergradsoppgave, 2018-08-16)
    The main tasks of Statens Vegvesen is to plan, build and maintain the roads of Norway. Tunnels are included as a part of this task. Due to expected changes in usage patterns and needs, the Norwegian authorities decided to adapt to the European model the design of low voltage networks. The backup power system is one of the most important parts of the installation and presents an independent source ...
  • Playing a video game is more than mere procrastination 

    Nordby, Kent; Løkken, Ronny Andre; Pfuhl, Gerit (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-06-13)
    <i>Background</i>: Procrastination is seen as a severe problem among young people, and many factors have been claimed to be associated with it, playing video games being one of them. One of the reasons why video games might be related to procrastination is their ability to offer instant gratification and feedback, while at the same time offer distractions from less tempting and rewarding tasks. ...
  • Multiphysics Study of Tensile Testing using Infrared thermography 

    Stange, Even; Andleeb, Zahra; Khawaja, Hassan; Moatamedi, Mojtaba (Journal article; Peer reviewed, 2019)
    In this work, the IR thermography was used to study the steel specimens (DIN 50125 Standard) undergoing the tensile tests. The tensile tests were performed using GUNT® Hamburg Universal Material Tester. The tensile specimens were clamped, and the test force was generated using a handoperated hydraulic system. A dial gauge measured the elongation of the specimens. Using the WP 300.20 system for data ...
  • Comparison of Explicit Method of Solution for CFD Euler Problems using MATLAB® and FORTRAN 77 

    Nordli, Anders Samuelsen; Khawaja, Hassan (Journal article; Peer reviewed, 2019)
    This work presents a comparison of an explicit method of solution for an inviscid compressible fluid mechanics problem using Euler equations for two-dimensional internal flows. The same algorithm was implemented in both FORTRAN 77 and MATLAB®. The algorithm includes Runge‒Kutta time marching scheme with smoothing. Both solvers were initialized in the same manner. In addition, it was ensured that ...
  • Spesifikke energiforsyningskonsepter i Smart Arctic Building 

    Li, Lin (Master thesis; Mastergradsoppgave, 2019-06-27)
    I oppgaven utredes det spesifikk energiforsyningskonsepter og energikombinasjoner som gir lavest energibruk. Oppgaven ser på to eldre lavboligblokker som ligger i Beisfjordveien 88 og 90, som eies av Ofoten Midt-Troms Boligbyggerlag. Bygget har i dag lite isolasjon, og elektrisk energiforsyning som medfører stort varmetap og høyt energiforbruk på ca. 216 kWh/m2. Rehabiliteringen av blokker omfatter ...
  • Effekt av Idrocrete KR 1000 på betongporestruktur og permeabilitet (Effect of Idrocrete WP 1000 on concrete pore structure and permeability) 

    Onyango Orony, Elvis (Master thesis; Mastergradsoppgave, 2019-06-27)
    This thesis includes a literature study where the focus is concrete theory and how additives affect the durability of the concrete. In addition, there will be a practical part where the largest part of the task will undergo mainly on the concrete laboratory. Two different mixtures will be mixed. A reference mixture (Ref.B35) and another mixtue with the same recipe, but this will contain an additive ...
  • Byggetekniske løsninger for kalde og arktiske strøk (Building design & solutions for cold and arctic environment) 

    Sara, Bernt Ailu Utsi; Blegeberg, Magnus Moland (Master thesis; Mastergradsoppgave, 2019-06-27)
    In recent years, there has been an increacing focus on environmental issues and the ongoing climate change. With predictions of increasing rainfall and more extreme weather, this poses a greater risk of damage to buildings, which again places stricter requirements on construction details. In Norway, there has been focus on construction in cold and arctic regions, and the impact on existing buildings ...
  • Kartlegging av inneklima på Skistua Barneskole (A study of the indoor climate at Skistua elementary school) 

    Lohne, Olav Nilsen; Thorrud, Lars (Master thesis; Mastergradsoppgave, 2019-06-27)
    The purpose of the measurements was to document whether the school had an acceptable indoor climate. An ''ørebro''-examination was performed as an indicator of which parameters might be appropriate to investigate. Using the survey, measurements of CO2, air temperature, PMV, relative humidity and airflow were made. The results that emerged showed that the school had a generally acceptable indoor ...
  • Bygningsfysiske utfordringer i forbindelse med kalde garasjeanlegg 

    Pettersen, Emil; Pettersen, Bjørn Anders (Master thesis; Mastergradsoppgave, 2019-06-26)
    "Årlig koster byggeskader samfunnet 17 milliarder, gjennom undersøkelser utført av SINTEF byggforsk er det konkludert med at 65-70 prosent av disse byggeskadene skyldes fukt (TU, 2017). Bygge skader som dette har resultert i at Plan og bygningsloven (PBL) og Direktoratet for byggkvalitet (DIBK) utarbeidet en ny forskrift som trådte i kraft pr. 1.1.2013 som ett tiltak på å redusere bygge skader. ...
  • Kritiske faktorer for effektivisering ved bygging av småhus. Hvordan kan småhusbransjen benytte digitalisering og industrialisering til å effektivisere boligbyggingen og redusere reklamasjoner? 

    Ådnanes, Vegard (Master thesis; Mastergradsoppgave, 2019-06-26)
    Småhusbransjen er et segment i bygge- og anleggsbransjen, en bransje som mellom år 2000 og 2016 opplevde en nedgang i effektivitet og produktivitet på 10 prosent. Denne nedgangen skyldes mange forskjellige faktorer, men blant annet ulike byggemetoder, dårlig planlegging og logistikk har ført til at det tar lengre tid å bygge en bolig i dag. Økt fokus på effektivisering ved boligbygging er et populært ...
  • Possibility study for utilization of solar energy in Arctic areas 

    Tamrakar, Stutee (Master thesis; Mastergradsoppgave, 2019-06-26)
    This thesis investigates a solar thermal system and a solar photovoltaic system which produces local energy by incoming solar radiation to meet the energy consumption demand of a residential building in the arctic region. An existing building block in Narvik, within the sub-arctic region, was taken as study case to analyze the potential of solar energy.
  • Energianalyse av vannbåren varmesystem - Omlegging fra 5 til 3 rørssystem 

    Kulvik, Stein Georg (Master thesis; Mastergradsoppgave, 2019-06-26)
    I samarbeid med oppdragsgiver K.Lund, ble det under dette prosjektet utført en analyse av det indirekte 3 rørssystemet ved Kanalen i Trondheim. Målet med oppgaven var å se på om det er store differanser på investeringskostnader og varmetap i de forskjellige systemene for vannbåren varme. Med holdepunkter i referanseanlegget ble det gjort analyse og simuleringer av de andre systemene. Resultatene ...
  • Optimization of the Energy Consumption of a Carbon Capture and Sequestration Related Carbon Dioxide Compression Processes 

    Jackson, Steven; Brodal, Eivind (Journal article; Peer reviewed, 2019-04-26)
    It is likely that the future availability of energy from fossil fuels, such as natural gas, will be influenced by how efficiently the associated CO2 emissions can be mitigated using carbon capture and sequestration (CCS). In turn, understanding how CCS affects the efficient recovery of energy from fossil fuel reserves in different parts of the world requires data on how the performance of each part ...
  • An Improved Mathematical Model for Green Lock Scheduling Problem of the Three Gorges Dam 

    Zhao, Xu; Lin, Qianjun; Yu, Hao (Journal article; Peer reviewed, 2019-05-08)
    In recent years, the environmental pollutions at the Three Gorges Dam have become an increasingly concerning issue of the Chinese government. One of the most significant environmental problems is the carbon emissions from the lockage operations at the two ship locks of the Three Gorges Dam. Currently, due to the large amount of vessels passing through the dam, there is always a long queue of vessels ...
  • Charging technology for small maritime vessels 

    Hoff, Bjarte (Conference object, 2019-01-21)
  • Fluid-Structure Interaction (FSI) Modelling of Aquaculture Net Cage 

    Myrli, Odd Einar; Khawaja, Hassan (Journal article; Peer reviewed, 2019)
    The number of good sites in less exposed locations for aquaculture farming is limited. Trends are now that the fish cages are increasing in both width and depth, as well as more weather-exposed locations, are taken into use. As the net cages continue to increase in size, so does the material costs. The design of the sea cages should be modified for safe and reliable use in remote offshore locations. ...
  • A multi-objective mathematical programming for sustainable reverse logistics network design. Part II: Model application and analysis 

    Yu, Hao; Solvang, Wei Deng; Solvang, Bjørn (Peer reviewed; Chapter; Bokkapittel, 2016-02)
    Reverse logistics has received more and more attention during the past decade due to the increasing public awareness of sustainable development. Because of the fluctuation in both quantity and quality of the reverse material flow, design and planning of reverse logistics network is much more complicated compared with the forward ones. Therefore, it is important to develop decision support tools for ...
  • Energieffektive glasskonstruksjoner 

    Sokolova, Marina (Master thesis; Mastergradsoppgave, 2017-06-08)
    Rapporten tar for seg vurdering av hvor stort varmetapet gjennom vinduene kan bli ved ulike vindustyper, og hvordan forskjellige vindusløsninger påvirker boligens energibehov. Det teoretiske grunnlaget tar for seg former for varmetransport, energioverføring gjennom glasset og glassruter, samt måter å forbedre varmeisolasjonsevnen på.

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