• Comparison of the Svee and Thoma Stability Criteria for Mass Oscillations in Surge Tanks 

      Leknes, Eirik (Master thesis, 2016)
      This thesis discusses two different criteria for the stability of surge tanks in hydropower plants. In 1910, the first stability criterion was derived by Dieter Thoma. This criterion sets a minimum cross-sectional area for ...
    • Comparison of the Svee and Thoma Stability Criteria for Mass Oscillations in Surge Tanks 

      Leknes, Eirik (Master thesis, 2016)
      This thesis discusses two different criteria for the stability of surge tanks in hydropower plants. In 1910, the first stability criterion was derived by Dieter Thoma. This criterion sets a minimum cross-sectional area for ...
    • Design of a Surge Tank Throttle for Tonstad Hydropower Plant 

      Gomsrud, Daniel (Master thesis, 2015)
      The objective of this thesis has been to evaluate the effect of throttling the surge tanks at Tonstad Hydropower Plant, by the means of one-dimensional numerical modelling in the program LVTrans. The background of the ...
    • Design of a Surge Tank Throttle for Tonstad Hydropower Plant 

      Gomsrud, Daniel (Master thesis, 2015)
      The objective of this thesis has been to evaluate the effect of throttling the surge tanks at Tonstad Hydropower Plant, by the means of one-dimensional numerical modelling in the program LVTrans. The background of the ...
    • Hydraulic Scale Modeling of Sediments for Pressurized Sand Traps 

      Steinkjer, Sofie Marie (Master thesis, 2018)
      I senere år har flere norske vannkraftverk opplevd driftsproblemer på grunn av sedimenter i turbinvannet. Dette kan føre til redusert virkningsgrad på turbin og dermed økonomiske tap. Et forskningsprosjekt på sandfang har ...
    • Hydraulic scale modelling and thermodynamics of mass oscillations in closed surge tanks 

      Vereide, Kaspar; Lia, Leif; Nielsen, Torbjørn Kristian (Journal article; Peer reviewed, 2015)
      The design and results from a hydraulic scale model of mass oscillations in a hydropower plant with a closed surge tank constructed as an underground rock cavern are presented. The results from the model test of an existing ...
    • Instrumentation and pore pressure monitoring technique for unlined tunnels of Norwegian hydropower projects – a case study 

      Neupane, Bibek; Panthi, Krishna Kanta; Vereide, Kaspar (Chapter, 2019)
      The power market in Norway was deregulated in 1991 and have caused power plants to operate with more frequently varying loads within short time periods. Such operation causes significant pressure fluctuations and unsteady ...
    • Numerisk modellering av luftputekammer 

      Tuseth, Ann Kristin (Master thesis, 2013)
      Denne oppgaven omhandler trykkstøt og massesvingninger i vannveien for store vannkraftverk. Svingekammer er den mest brukte løsningen for å håndtere trykkstøt, som oppstår i vannveien når vannføringen endres. Luftputekammer ...
    • Numerisk modellering av termodynamiske prosesser i luftputekammer 

      Kjøren, Erik (Master thesis, 2014)
      Det er i denne oppgaven utført numeriske simuleringer av en langvarig transient i et luftputekammer. Hovedfokuset har vært å gjenskape data fra feltmålinger av vannstand og trykk i luftputekammer ved magasinbytte i Jukla ...
    • Optimizing surge tank layout for highly flexible hydropower 

      Richter, Wolfgang; Vereide, Kaspar; Zenz, Gerald (Journal article; Peer reviewed, 2018)
      This article considers high-head hydropower schemes and pumped storage schemes that usually are considered as flexible power plants. Surge tanks are the key structural element in the hydropower scheme for flexible operation ...
    • Physical Modelling of Surge Tank Throttling 

      Landskaug, Robert Stigen (Master thesis, 2015)
      The scope of this master thesis is to design a surge tank throttle based on literature values, and compare the expected head loss factor with the results from a 3D numerical simulation, and a physical model test. A literature ...
    • Physical Modelling of Surge Tank Throttling 

      Landskaug, Robert Stigen (Master thesis, 2015)
      The scope of this master thesis is to design a surge tank throttle based on literature values, and compare the expected head loss factor with the results from a 3D numerical simulation, and a physical model test. A literature ...
    • Simulering av pumpekraftverk i LVTrans 

      Havrevoll, Ola Haugen (Master thesis, 2013)
      Duge kraftverk er eit pumpekraftverk med effekt på 100 MW. I denne avhandlinga skulle det undersøkjast om kraftverket kan utvidast med større vassføring, og om det kan nyttast med hyppige avslag og pådrag. Duge kraftverk ...
    • Snow measurements with drones 

      Rynning, Erik Kleiven (Master thesis, 2019)
      Snømåling med drone ved bruk av fotogrammetri for å lage 3D modellar av eit område er ein ny teknologi som kan vere veldig nyttig for vasskraftselskap for å berekne snømagasin. Med det kan vasskraftselskapa finne forventa ...
    • Stability assessment of the asphalt concrete tunnel invert of Roskrepp hydropower project 

      Mong Urdal, Anna Helene (Master thesis, 2018)
      Rebuilding a hydropower plant into a pumped-storage plant in an underground tunnel, means that the water will rapidly change directions, instead of streaming evenly in one direction. This will cause extra water pressure ...
    • Surge Tank Atlas for Hydropower Plants 

      Sandvåg, Simon Utseth (Master thesis, 2016)
      The objective of this master's thesis is to describe the existing surge tank solutions and additional improvements, and to simulate the hydraulic behavior of the surge tanks and how it affects the hydropower plant. The ...
    • Surge Tank Atlas for Hydropower Plants 

      Sandvåg, Simon Utseth (Master thesis, 2016)
      The objective of this master's thesis is to describe the existing surge tank solutions and additional improvements, and to simulate the hydraulic behavior of the surge tanks and how it affects the hydropower plant. The ...
    • Surge Tank Research in Austria and Norway 

      Vereide, Kaspar; Richter, Wolfgang; Zenz, Gerald; Lia, Leif (Journal article, 2015)
      Modern high-head hydropower plants, and especially pumped storage plants (PSP), are designed with increasing high water discharge and higher requirements to flexible operation. To improve the hydraulic performance and allow ...
    • The Effect of Surge Tank Throttling on Governor Stability, Power Control, and Hydraulic Transients in Hydropower Plants 

      Vereide, Kaspar; Svingen, Bjørnar; Nielsen, Torbjørn Kristian; Lia, Leif (Journal article; Peer reviewed, 2017)
      This paper investigates the effect of surge tank throttling on governor stability, power control, and hydraulic transients in hydropower plants. The work is intended to be practical, but includes some new research. The ...
    • Thermodynamic Behaviour and Heat Transfer in Closed Surge Tanks for Hydropower Plants 

      Vereide, Kaspar; Tekle, Torbjørn; Nielsen, Torbjørn Kristian (Journal article; Peer reviewed, 2015)
      A numerical model of a hydraulic system with a closed surge tank is developed for evaluating the thermodynamic behavior during slow transients in the air pocket. The numerical model is used to evaluate the polytrophic ...