Blar i NTNU Open på forfatter "Kverno, Johannes Opedal"

Viser treff 1-6 av 6

    • Calibration of strain gauges on a model runner blade combining numerical and experimental data 

      Kverno, Johannes Opedal; Iliev, Igor; Solemslie, Bjørn Winther; Dahlhaug, Ole Gunnar (Peer reviewed; Journal article, 2023)
      In this paper, we present the calibration setup, method, and results for a set of strain gauges installed on the trailing edge of the runner blades of a model Francis turbine. The calibration work is done as a step in the ...

    • Challenges with onboard strain measurements on a model Francis turbine runner 

      Kverno, Johannes Opedal; Vefring, Gaute Elde; Iliev, Igor; Solemslie, Bjørn Winther; Dahlhaug, Ole Gunnar (Peer reviewed; Journal article, 2023)
      As the world transitions towards more renewable energy sources, as a step to reduce the emissions of CO2, intermittent and non-dispatchable sources like solar and wind will take up a larger proportion of the energy production. ...

    • Flexible operation of Francis turbines 

      Kverno, Johannes Opedal (Doctoral theses at NTNU;2023:387, Doctoral thesis, 2023)
      With the planned cuts in emissions, more of the electric energy will have to come from renewable sources. Two of the largest potential sources are wind- and solar, which have the downside of also being intermittent and ...

    • High flexibility in Francis turbine operation and design philosophy: A review 

      Kverno, Johannes Opedal; Iliev, Igor; Dahlhaug, Ole Gunnar (Peer reviewed; Journal article, 2022)
      This paper examines and discusses how various operation schemes and design philosophies can prolong the expected lifetime of a hydro turbine subjected to many start-stop cycles and high ramping rates. With the proliferation ...

    • Pressure pulsations and thermodynamic efficiency measurements at Smeland power plant 

      Kverno, Johannes Opedal; Ulvan, Vegard Selvåg (Master thesis, 2018)
      In this master thesis, the cause and solution of a problem at Smeland power plant have been thoroughly investigated. The power plant has for years experienced severe pressure pulsations in their Francis turbine at full ...

    • Test of a Francis turbine with new guide vanes 

      West, Halvor Hølmkjær (Master thesis, 2022)
      Verden har gjennom Parisavtalen i 2015 og senere den oppdaterte Glasgowavtalen i 2021 blitt enig om å fase ut kullkraft. I tillegg til et større forbruk med store variasjoner, er det et behov for å bygge ut fornybare ...