Blar i NTNU Open på forfatter "Nydal, Ole Jørgen"

Viser treff 61-80 av 85

    • PV-to-Heat: Control and Monitoring Methods 

      Egerdahl, Martin August (Master thesis, 2024)
      Mange afrikanske land har en økende befolkning og økonomi. Imidlertid er energiproduksjonen regelmessig ikke tilstrekkelig, noe som fører til strømbrudd i byene og distriktene har ikke tilgang til strøm. Mindre enn 10 % ...

    • Robust control solutions for stabilizing flow from the reservoir: S-Riser experiments 

      Esmaeilpour Abardeh, Mahnaz (Master thesis, 2013)
      One of the best suggested solutions for prevention of severe-slugging flow conditions at offshore oilfields is the active control of the production choke valve. This thesis is a study of robust control solutions for ...

    • Self-regulating oil based heat storage 

      Hansen, Even Ersdal; Bogsnes, Christian (Master thesis, 2018)
      This paper has investigated the possibility of storing excess energy from solar systems as heat, using sunflower oil as the heat storage medium and heat transfer fluid. Three subsystems were designed to heat, store and ...

    • Simulation of expansion driven flow instabilities in long risers 

      Kjeldby, Tor Brox (Master thesis, 2010)
      A series of former small scale experiments on unstable gas lift conducted at the NTNU multiphase laboratory have become subject to numerical simulations with two different multiphase one-dimensional flow simulators. In the ...

    • Simulation of Unstable Two-phase Flows in Long Risers 

      Akselsen, Andreas Holm (Master thesis, 2012)
      The principles of the object oriented slug tracking schemes at EPT (Department of Energy and Process Engineering, NTNU) have been developed and discussed in some detail.Simple bench-mark testing revealed that the LASSI ...

    • Single Tank Oil Based Heat Storage for Cooking 

      Bjørshol, Andreas; Nylund, Gunn Helen (Master thesis, 2021)
      I denne masteroppgaven blir design og testing av et termisk energilager som kan brukes as familier og institusjoner i land sør for Sahara i Afrika undersøkt. Systemet består av en oljetønne med en trakt og et varmeelement ...

    • Single Tank Oil Based Heat Storage for Cooking 

      Nylund, Gunn Helen; Bjørshol, Andreas (Master thesis, 2021)
      I denne masteroppgaven blir design og testing av et termisk energilager som kan brukes as familier og institusjoner i land sør for Sahara i Afrika undersøkt. Systemet består av en oljetønne med en trakt og et varmeelement ...

    • Small scale experiments on severe slugging in flexible risers. 

      Ita, Eyamba (Master thesis, 2011)
      Severe slugging is an undesirable unsteady multiphase flow phenomenon which occurs in riser-pipeline systems. During the course of this masters thesis work, a dynamic coupling has been shown to exist between this flow ...

    • Small Scale Experiments with Gas-Liquid Slug Flow in Floating Pipes 

      Akhiiartdinov, Anvar (Master thesis, 2016)
      Multiphase flow is one of the key issues in the petroleum engineering, especially in the subsea industry. Depending on the gas and liquid flowrates, it can have different flow patterns that create unwanted dynamic forces. ...

    • Small scale multiphase flow experiments on surge waves in horizontal pipes 

      Grødahl, Steinar Ingebrigtsen (Master thesis, 2014)
      Long surge waves are observed at the receiving separator after production ramp up on several gas-condensate fields. Surge waves are observed as long and slow oscillations in the liquid flow rate at the outlet of the pipeline, ...

    • Small scale severe slugging experiments with several risers 

      Solstad, Ingrid Sofie (Master thesis, 2015)
      Severe slugging is a multiphase flow phenomenon that can occur in flowline-riser systems when conditions allow it. Its periodical fluctuations in pressure and mass flow can cause operational problems in downstream processing ...

    • Solar Powered Heat Storage for Injera Baking 

      Tesfay, Asfafaw H; Kahsay, Mulu Bayray; Nydal, Ole Jørgen (Journal article; Peer reviewed, 2014)
      Ethiopia with a population of about 85 million meets 96% of its energy needs with bio-mass, charcoal, wood, animal dung and plant residues. More than 50% of this energy goes entirely on baking Injera. Injera the national ...

    • Solar Water Heater with Temperature Control for 90˚C Water Requirement 

      Tømterud, Marte Maria (Master thesis, 2023)
      Solen er den rikeste energikilden på jorden, og på én enkelt time kan den gi energi tilsvarende menneskehetens årlige kraftbehov. Solinnstrålingens tetthet varierer rundt kloden, og de høyeste verdiene er å finne ved ...

    • Structure - Slug Flow Coupling: Small Scale Experiments with Submerged Flexible Pipes 

      Mohamed Hemeda, Amr Khalil Hemeda Khalil (Master thesis, 2015)
      Multiphase flows include several flow regimes that exist with different conditions. The time varying forces in flexible pipes conveying two-phase flows results in very dynamic structural behavior. These varying forces ...

    • Testing and Modelling of a Wax Control System for Cold Flow Transport of Waxy Oil 

      Novoseltsev, Yury (Doctoral theses at NTNU;2022:294, Doctoral thesis, 2022)
      There are no economical ways to tie back subsea waxy oil fields with distances to shore more than 50 km without treating the fluid on a platform or FPSO. For more considerable distances, solutions like heating could be too ...

    • Thermal analysis of a directly heated solar heat storage 

      Kanstad, Ørjan Halvorsen (Master thesis, 2014)
      A solar heat storage was designed and simulated. The Scheffler reflector is used to concentrate sun rays that are used to charge a thermal storage.

    • Thermal Solar Energy: Comparison between direct and indirect systems 

      Astobitza Eguren, Udane (Master thesis, 2020)
      World energy consumption grows day by day, and so does the environmental concern. Consequently, the use of renewable energies, such as solar energy, is very important to meet the energy demand without damaging the planet. ...

    • Topics in Production Systems Modeling: Separation, Pumping and Model Based Optimization 

      Stanko, Milan Edvard Wolf (Doktoravhandlinger ved NTNU, 1503-8181; 2014:180, Doctoral thesis, 2014)
      This thesis addresses three distinct topics within oilfield production technology: 1) Inline oil-water separation for subsea applications, 2) Model based constrained optimization for production networks of high water cut ...

    • Transiente olje-vann strømningsforsøk 

      Ingebo, Pål Idar (Master thesis, 2009)
      Denne masteoppgaven er i all hovedsak rettet mot å ekstrahere eksperimentelle data på olje-vann flushing, begge i væskefase. Det vil også gjøres en evaluering på hvor godt flerfasesimulatoren OLGA 6.0 klarer å reprodusere ...

    • Two-way coupled fluid-structure interaction of gas-liquid slug flow in a flexible riser: Small-scale experiments and simulations 

      Vieiro Medina, Joaquin Jose; Akhiiartdinov, Anvar; Sævik, Svein; Larsen, Carl Martin; Nydal, Ole Jørgen (Journal article; Peer reviewed, 2019)
      Flexible risers might be subjected to large pressure and density fluctuations when transporting multiphase mixtures as different flow patterns may take place. Those fluctuations might induce large forces on the structure, ...