Browsing NTNU Open by Author "Gogstad, Peter Joachim"
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Evaluation of runner cone extension to dampen pressure pulsations in a Francis model turbine
Gogstad, Peter Joachim; Dahlhaug, Ole Gunnar (Journal article; Peer reviewed, 2016)Today's energy market has a high demand of flexibility due to introduction of other intermittent renewables as wind and solar. To ensure a steady power supply, hydro turbines are often forced to operate more at part load ... -
Experimental investigation and mitigation of pressure pulsations in Francis turbines
Gogstad, Peter Joachim (Doctoral theses at NTNU;2017:202, Doctoral thesis, 2017)Hydraulic turbomachines, such as Francis turbines, have been utilized for more than a century to generate renewable energy. Research and development has led to an outstanding level of efficiency and reliability, with the ... -
Hydraulic design of Francis turbine exposed to sediment erosion
Gogstad, Peter Joachim (Master thesis, 2012)High concentrations of sediments is a serious problem for hydropower stations in the Himalayas and the Andes Mountains. For run-of-river power plants sediment causes heavy erosion even with settling basins. This leads to ... -
Investigation of the Unsteady Pressure Pulsations in the Prototype Francis Turbines -Part 1: Steady State Operating Conditions
Trivedi, Chirag; Gogstad, Peter Joachim; Dahlhaug, Ole Gunnar (Journal article, 2018)Hydropower is one of the most reliable renewable sources of electricity generation. With high efficiency and good regulating capacity, hydropower has the ability to meet rapid changes in power demand. Large investments in ... -
Investigation of the unsteady pressure pulsations in the prototype Francis turbines during load variation and startup
Trivedi, Chirag; Gogstad, Peter Joachim; Dahlhaug, Ole Gunnar (Journal article; Peer reviewed, 2017)This work investigates the unsteady pressure fluctuations in two prototype Francis turbines during load variation and start-up. Although hydraulic turbines are expected to experience such events over their lifetime, the ... -
Virkningsgrads- og trykkpulsasjonsmålinger ved lavtrykks vannkraftverk
Aas, Anders Jensen (Master thesis, 2015)Av alle måter å produserer elektrisk kraft på, både fornybare og ikke-fornybare, er vannkraft den som lettest lar seg regulere. Mens vind- og solkraft kun produserer kraft når vind og sol er til stede og kraftverk som går ...