Browsing NTNU Open by Author "Karoliussen, Håvard"

Now showing items 1-18 of 18

    • Aktiv laststyring i mikronett 

      Lyngved, Kristian; Mickelborg, Thomas; Teigmoen, Anders (Bachelor thesis, 2019)
      Norway has a large coastal area with many islands that are provided with electricity from expensive sub-sea cables and long transmission lines. In stead of renewing existing infrastructure in remote areas, it could be cost ...

    • Bipolar Plates for PEM Systems 

      Lædre, Sigrid (Doctoral thesis at NTNU;2016:247, Doctoral thesis, 2016)
      Summary of thesis: The Bipolar Plate (BPP) is an important component in both Proton Exchange Membrane Fuel Cells (PEMFCs) and Proton Exchange Membrane Water Electrolyzers (PEMWEs). Bipolar plate material and processing ...

    • Depotlading av elektriske busser i Oslo og Akershus 

      Bratlie, Frida; Haaskjold, Kristina; Nesje, Andreas Tveita (Bachelor thesis, 2019)
      Som en del av elektrifiseringen av den norske transportsektoren er elektriske busser et viktig bidrag for å redusere klimagassutslippet. Oslo ønsker å være i toppen av elektrifiseringen og ble tildelt tittelen Europeisk ...

    • Elektrifisering av havbruk til havs 

      Berg, Kristina; Høigård, Elise Tajet; Sandhu, Simran Jit Kaur; Vågen, Marthe (Bachelor thesis, 2020)
      Fiskeri- og havbruksnæringen er en stor industri i Norge i dag. Halvparten av oppdrettsanleggene nærmere land er elektrifisert med landstrøm. De resterende oppdrettsanleggene er i dag driftet med dieselaggregat. Bruken av ...

    • En effektiv energimerkeordning 

      Domaas, Ailda Johanne; Markhus, Silje Stavnås (Bachelor thesis, 2020)
      Enova la i 2019 ut et forprosjekt der det ble presentert et forslag til videreutvikling av energimerkeordningen. Dette forprosjektet ble lagt ut for høring og har svarfrist i mai 2020. Denne oppgaven ser på hvilke endringer ...

    • Heat Sources, Thermal Conductivity and Heat Distribution in Electrochemical Energy Storage Technologies 

      Bock, Robert (Doctoral theses at NTNU;2018:408, Doctoral thesis, 2018)
      The work presented in this thesis is based on taking thermal conductivity measurements of a range of materials used in three different electrochemical energy storage technologies. Specifically, two hydrogen technologies, ...

    • Materials for Proton Exchange Membrane water electrolyzer bipolar plates 

      Lædre, Sigrid; Kongstein, Ole Edvard; Ødegård, Anders; Karoliussen, Håvard; Seland, Frode (Journal article; Peer reviewed, 2017)
      Titanium based BiPolar Plates (BPPs) are commonly used in Proton Exchange Membrane Water Electrolyzers (PEMWEs) today as they can withstand the harsh operating conditions experienced inside an operating PEM water electrolyzer. ...

    • Measuring In Situ Interfacial Contact Resistance in a Proton Exchange Membrane Fuel Cell 

      Lædre, Sigrid; Kongstein, Ole Edvard; Ødegård, Anders; Seland, Frode; Karoliussen, Håvard (Journal article; Peer reviewed, 2019)
      Interfacial contact resistance (ICR) is one of the remaining hurdles for successful implementation of stainless steel bipolar plates in PEM fuel cells. We have developed a reliable method, using thin gold wires, to measure ...

    • Measuring the thermal conductivity of membrane and porous transport layer in proton and anion exchange membrane water electrolyzers for temperature distribution modeling 

      Bock, Robert; Karoliussen, Håvard; Seland, Frode; Pollet, Bruno; Thomassen, Magnus; Holdcroft, Steven; Burheim, Odne Stokke (Journal article; Peer reviewed, 2019)
      Water electrolyzers that use a membrane electrolyte between the electrodes are a promising technology towards mass production of renewable hydrogen. High power setups produce a lot of heat which has to be transported through ...

    • Opportunities and challenges for thermally driven hydrogen production using reverse electrodialysis system 

      Raka, Yash Dharmendra; Karoliussen, Håvard; Lien, Kristian Myklebust; Burheim, Odne Stokke (Journal article; Peer reviewed, 2019)
      Ongoing and emerging renewable energy technologies mainly produce electric energy and intermittent power. As the energy economy relies on banking energy, there is a rising need for chemically stored energy. We propose heat ...

    • Optimising fast charging of electric vehicles by smart charging technologies in areas with limited grid capacity 

      Berdahl, Cassandra; Jamessen, Eivind; Merzoug, Sabine (Bachelor thesis, 2020)
      Tilrettelegging av hurtigladeteknologi bidrar til Norges mål om at alle biler skal være utslippsfrie innen 2025 og vil være avgjørende for elektrifiseringen av transportsektoren. I dag eier Circle K et betydelig antall ...

    • Optimization of Microgrids Feasibility Study and Economic Analysis of Rye Microgrid 

      Berge, Renate Høvik; Haugland, Fredrik Rudfoss; Langseth, Ida Erika Witt (Bachelor thesis, 2019)
      Mikronett har potensialet til å bli en fremtidlig løsning for å forsyne avsidesliggende steder med energi. TrønderEnergi undersøker denne forretningsmuligheten som en del av REMOTE prosjektet på Froan, en gruppe øyer på ...

    • Survey of Wave Energy and matured Wave Energy Technology 

      Sørbotten, Tuva Garbom (Bachelor thesis, 2020)
      Hensikten med denne bacheloren har vært å gjennomføre en undersøkelse for å finne ut statusen på bølgekraft i dag, hvor modnet bølgekraftteknologien er og om den er kokurransedyktig på markedet i dag. Hoveddelen av bacheloren ...

    • The influence of argon, air and hydrogen gas on thermal conductivity of gas diffusion layers and temperature gradients in PEMFCs 

      Bock, Robert; Hamre, Bjørnar; Onsrud, Morten Andreas; Karoliussen, Håvard; Seland, Frode; Burheim, Odne Stokke (Journal article; Peer reviewed, 2019)
      Gas diffusion layers (GDL) in fuel cells have to satisfy a range of conflicting demands. They must deliver good mass transport, but also good electrical and thermal transport. The thermal conductivity of two GDLs was ...

    • The influence of graphitization on the thermal conductivity of catalyst layers and temperature gradients in proton exchange membrane fuel cells 

      Bock, Robert; Karoliussen, Håvard; Pollet, Bruno; Secanell, Marc; Seland, Frode; Stanier, Dave; Burheim, Odne Stokke (Journal article; Peer reviewed, 2018)
      As the proton exchange membrane fuel cell (PEMFC) has improved its performance and power density, the efficiency has remained unchanged. With around half the reaction enthalpy released as heat, thermal gradients grow. To ...

    • Thermal Conductivity and Compaction of GDL-MPL Interfacial Composite Material 

      Bock, Robert; Shum, A. D.; Xiao, X.; Karoliussen, Håvard; Seland, Frode; Zenyuk, Iryna V.; Burheim, Odne Stokke (Journal article; Peer reviewed, 2018)
      The microporous layer (MPL) and the gas diffusion layer (GDL) in a polymer electrolyte membrane (PEM) fuel cell assembly are often treated as separate layers in the literature. However, there exists a considerable third ...

    • Thermal Conductivity in PEMFC PTLs with Different Gas Content and Corresponding simple PEMFC Internal Temperature Profiles 

      Hamre, Bjørnar (Master thesis, 2017)
      More than 50 % of the PEMFC (Polymer Electrolyte Membrane Fuel Cell) energy is released as heat. The aim for this thesis was to contribute to the understanding of the management of that heat. The heat management in the ...

    • Thermal Gradients with Sintered Solid State Electrolytes in Lithium-Ion Batteries 

      Bock, Robert; Onsrud, Morten; Karoliussen, Håvard; Pollet, Bruno; Seland, Frode; Burheim, Odne Stokke (Journal article; Peer reviewed, 2020)
      The electrolyte is one of the three essential constituents of a Lithium-Ion battery (LiB) inaddition to the anode and cathode. During increasingly high power and high current charging anddischarging, the requirement for ...