• AlternaFuture - Final Report 

      Vereide, Kaspar; Mo, Birger; Forseth, Torbjørn; Lia, Leif; Nysveen, Arne; Dahlhaug, Ole Gunnar; Schäffer, Linn Emelie; Bustos, Ana Adeva; Sundt-Hansen, Line; Øvregård, Eirik; Glimen, Pål; Hesthagen, Trygve; Skår, Margrete; Nielsen, Torbjørn Kristian (HydroCen Report;18, Research report, 2020)
      AlternaFuture has been a multidisciplinary research project in Hydrocen to investigate the potential of extreme upgrading of existing hydropower system with a positive effect on the environmental conditions. The project ...
    • CFD Simulations of Open and Closed Sand Trap Design for Tonstad Hydropower Plant 

      Næss, Rakel (Master thesis, 2020)
      Denne masteroppgaven handler om numerisk modellering (“Computational Fluid Dynamics”, CFD) av Sandfang 3 ved Tonstad kraftverk med dagens utforming og rekonstruert med horisontale ribber. Det ble observert sedimentproblemer ...
    • 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 ...
    • Efficiency of Pressurized Rock Traps for Unlined Hydropower Tunnels 

      Havrevoll, Ola Haugen; Vereide, Kaspar; Lia, Leif (Peer reviewed; Journal article, 2021)
      Pressurized rock traps are constructed in many hydropower plants to stop sand and gravel from being transported through the turbines. Pressurized rock traps are typically located in the downstream end of unlined headrace ...
    • Flexible Sandtraps - Final Report 

      Vereide, Kaspar; Richter, Wolfgang; Havrevoll, Ola Haugen; Belete, Kiflom; Shrestha, Usha; Navaratnam, Ushanth; Mauko, Gasper; Lia, Leif (HydroCen Report;20, Research report, 2021)
      The Flexible Sandtraps (FlekS) project has been a four-year research project on upgrading of existing pressurized sandtraps in operational hydropower plants. Upgrading of existing sandtraps have several challenges compared ...
    • 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 ...
    • Improved design of unlined air cushion surge chambers 

      Ødegaard, Henki; Vereide, Kaspar; Nilsen, Bjørn (Peer reviewed; Journal article, 2021)
      An overview of important design considerations for unlined air cushion surge chambers is given and three innovative solutions that can enable a safer and more economic design are presented. The paper is based on information ...
    • 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 ...
    • Investigations of Rake and Rib Structures in Sand Traps to Prevent Sediment Transport in Hydropower Plants 

      Ivarson, Mads Mehus; Trivedi, Chirag; Vereide, Kaspar (Journal article; Peer reviewed, 2021)
      In order to increase the lifespan of hydraulic turbines in hydropower plants, it is necessary to minimize damages caused by sediment erosion. One solution is to reduce the amount of sediments by improving the design of ...
    • Numerical study of flow calming structures in hydropower plants 

      Ivarson, Mads Mehus (Master thesis, 2021)
      For å forlenge livsløpet til hydrauliske turbiner er det nødvendig å minimere skader forårsaket av sedimentslitasje. En mulig løsning er å forbedre sandfanget for å redusere mengden sedimenter som når turbinene. I dette ...
    • 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 ...
    • Operation of Norwegian Hydropower Plants and Its Effect on Block Fall Events in Unlined Pressure Tunnels and Shafts 

      Neupane, Bibek; Vereide, Kaspar; Panthi, Krishna Kanta (Peer reviewed; Journal article, 2021)
      The main objective of this study is to investigate the effect of hydropower plant operation on the long-term stability of unlined pressure tunnels of hydropower plants in Norway. The authors analyzed the past production ...
    • 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 ...