Blar i Institutt for energi og prosessteknikk på forfatter "Dahlhaug, Ole Gunnar"

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    • Current research in hydraulic turbines against sediment erosion: International partnership and collaborations 

      Thapa, Biraj Singh; Thapa, Bhola; Dahlhaug, Ole Gunnar; Lee, Young Ho; Zhongdong, Qian (Peer reviewed; Journal article, 2021)
      The problem of material erosion in hydraulic machineries has been under the investigation since a century ago. However, the proper solutions to the erosion of hydro turbine due to sediment-laden flows has not been found ...

    • Damping Measurements on a Multi-Blade Cascade with Multiple Degrees of Freedom: A Francis-99 Test Case 

      Bergan, Carl Werdelin; Tengs, Erik Os; Solemslie, Bjørn Winther; Østby, Petter Thorvald Krogh; Dahlhaug, Ole Gunnar (Journal article; Peer reviewed, 2019)
      Due to thinner blades and higher demands for flexibility, the high-head Francis runners designed today face considerable challenges that severely affect the runners' expected lifetime. For many high-head Francis runners, ...

    • Design and Dynamic Modeling of the Support Structure for a 10 MW Offshore Wind Turbine 

      Crozier, Aina (Master thesis, 2011)
      This thesis presents two designs of tension-leg-platforms (TLP) support structures for the 10 MW reference wind turbine being developed by the Norwegian Research Centre for Offshore Wind Technology (NOWITECH). The designs ...

    • Design and operation of a Francis Turbine with Variable Speed Capabilities 

      Sundfør, Else Høeg (Master thesis, 2017)
      Statkraft recently decided to develop 1000 MW of wind energy in the middle of Norway. Wind power is an unreliable energy source. Hydropower is therefore needed to balance energy production supplied to the grid. However, ...

    • Design and Test of a Micro Turbine in the Water Power Laboratory 

      Frydenlund, Vetle (Master thesis, 2018)
      The Norwegian company Deep River which specialises in small scale hydro power has developed the concept of a simple and portable micro propeller turbine, delivering 16 kW at a head of 5 meter and a discharge of 400 l/s. ...

    • Design av ventialsjonsvifte 

      Nenseter, Sondre (Master thesis, 2010)
      Bakgrunn Nye EU-direktiver legger press på å komme med nye løsninger som gir lavere energi forbruk i bygninger. Da ventilasjon av bygg krever mye energi, vil optimalisereing av komponenter i ventilasjon systemene bidra ...

    • Design av ventilasjonsvifte 

      Haugsvold, Halvor (Master thesis, 2010)
      For å møte nye, strengere krav til energibruk i næringsbygg og ha mulighet til å realisere Zero Emission Buildings, er det nødvendig med en forbedring av konstruksjon og drift av ventilasjonssystem. Ventilasjonsvifter står ...

    • Design of a Pelton Model Test Rig at Kathmandu University 

      Stene, Ida Bordi (Master thesis, 2014)
      Design av Pelton modelltestrigg for Kathmandu University. Pelton-riggen ved vannkraftlaboratoriet på NTNU vil bli brukt som utgangspunkt. Nødvendige endringer vil bli evaluert, designet og dokumentert.

    • Design of a Portable Reverse Osmosis System 

      Løken, Thea Karlsen (Master thesis, 2016)
      The motivation for this thesis was to design a reverse osmosis system that is small, lightweight, durable and easy to transport. The intended application area of the system is to secure the supply of clean drinking water ...

    • Design of a Turbine That Utilizes the Energy in Spill Water of Large Ships 

      Meek, Christoffer (Master thesis, 2018)
      In this master thesis, a Straflo turbine prototype used for energy recovering in large ships was tested, evaluated, and redesigned. The main goals were first to evaluate the performance of the prototype based on efficiency ...

    • Design of the measurment setup for the friction torque and axial load on the Francis turbine test rig 

      Selmurzaev, Magomed (Master thesis, 2016)
      Hydropower laboratories are used to determine the hydraulic performance of model turbines, which can then be used as an indication of expected prototype operation. The rules and guidelines for performance of complete model ...

    • Design-Optimization of a Francis turbine draft tube 

      Herland, Ingelin (Master thesis, 2020)
      Denne masteroppgaven omhandler optimalisering av sugerøret til en Francisturbin som opererer på variabelt turtall. Forbedrede design er diskutert relativt et referansedesign, i form av økt trykkgjenvinning gjennom sugerøret ...

    • Development of a Francis Turbine Test Rig at Kathmandu University 

      Engøy, Andrea (Master thesis, 2019)
      Nepal har et stort potensial for vannkraft som ikke er utnyttet. Denne masteroppgaven er en del av det langvarige samarbeidet mellom Kathmandu University (KU) og Norges teknisk-naturvitenskapelige universitet (NTNU) for å ...

    • Development of a Francis Turbine Test Rig at Kathmandu University 

      Grefstad, Morten (Master thesis, 2017)
      The focus on hydropower development in Nepal has increased as consequence of the growing energy demand in the region. To render possible locally executed performance tests on model turbines, the Turbine Testing Laboratory ...

    • Development of a Francis Turbine Test Rig at Kathmandu University 

      Bådsvik, Julia Kiri Ellinor (Master thesis, 2019)
      Denne masteroppgaven er en del av prosjektet EnergizeNepal, som har som mål å utvikle og bygge en francisturbin-testrigg for Universitetet i Kathmandu som oppfyller kravene i IEC60193. Nepal har store vannkraftressurser, ...

    • Development of a Francis Turbine Test Rig at Kathmandu University - Utvikling av en Francisturbin testrigg ved Kathmandu University 

      Kjerschow, Andreas (Master thesis, 2017)
      Even though Nepal is situated between two of the fastest growing economies in the world, India and China, they still lag behind. With the worldwide change towards renewable energy, growing power demand and the vast hydropower ...

    • Development of an accumulator system for a pulsating Pelton nozzle 

      Bergflødt, Thomas Lindseth (Master thesis, 2017)
      Hydro Power Technologies Inc. (HPT) aims to develop a Pelton turbine configuration where a pulsating nozzle shapes the water into projectiles, one for each passing Pelton bucket. The scope of this thesis is to develop and ...

    • Development of new mechanical design of model turbines 

      Rundhaug, Kristoffer (Master thesis, 2014)
      The production of model Francis runner to be used in the Waterpower laboratory at NTNU is a length and costly process. Due to the production cost there are years between each time a new Francis model is bought. The Tokke ...

    • Development of simplified model for prediction of sediment induced erosion in Francis turbine’s sidewall gaps 

      Acharya, Nirmal; Gautam, Saroj; Chitrakar, Sailesh; Dahlhaug, Ole Gunnar (Peer reviewed; Journal article, 2022)
      Sediment induced erosion in exposed components of hydraulic turbines is a major issue in most of the sediment laden hydropower projects. Gradual removal of material can change the components profile which can lead to change ...

    • Dimensioning Loads for a Tidal Turbine 

      Sæterstad, Marie Lunde (Master thesis, 2011)
      The main dynamic loads on a tidal turbine are due to the tidal current variation, turbulence, wave-current interaction and wake from the tower and upstream turbines. The design of the turbine is highly dependent on the ...