Torbjørn Kristiansen Nielsen
73593572
91897572
Vannkraftlaboratoriet, 2. etg, 24, Gløshaugen, Alfred Getz vei 4
Om
Om Torbjørn K. Nielsen
Jeg er professor ved Institutt for energi og prosessteknikk, nærmere bestemt leder på Vannkraftlaboratoriet. Aktivitetene ved Vannkraftlaboratoriet innebærer forskning innen hydrauliske maskiner, spesielt vannkraftturbiner, men også pumper og annet hydraulisk maskineri. Min spesielle interesse ligger i samspillet mellom vannkraftturbiner og systemet, både på hydraulisk side og elektrisk.
På Vannkraftlaboratoriet har vi for tiden 12 Masterstudenter og 6 PhD studenter. Mye av min tid går med til veiledning av disse. Oppgavene spenner over design av maskiner, trykkpulsasjoner, kavitasjon, systemanalyse, både for turbiner og pumper mm.
Andre verv: Leder for Teknisk kommite 4 i NEK, medlem av TC4 i den internasjonale standardiserinsorganisasjonen IEC, medlem av IAHR spesielt tilknyttet "Hydraulic Machinery and Systems".
Publikasjoner
2022
-
Kelele, Hailay Kiros;
Frøyd, Lars;
Kahsay, Mulu Bayray;
Nielsen, Torbjørn Kristian.
(2022)
Characterization of Aerodynamics of Small Wind Turbine Blade for Enhanced Performance and Low Cost of Energy.
Energies.
volum 15 (21).
Vitenskapelig artikkel
2021
-
Cavazzini, Giovanna;
Storli, Pål-Tore Selbo;
Nielsen, Torbjørn Kristian.
(2021)
Hydropower.
World Scientific Series in Current Energy Issues: Volume 7 Wind, Water and Fire The Other Renewable Energy Resources.
Vitenskapelig kapittel/artikkel
2020
-
Kelele, Hailay Kiros;
Nielsen, Torbjørn Kristian;
Froyd, Lars;
Kahsay, Mulu Bayray.
(2020)
Catchment Based Aerodynamic Performance Analysis of Small Wind Turbine Using a Single Blade Concept for a Low Cost of Energy.
Energies.
volum 13 (21).
Vitenskapelig artikkel
2019
-
Dhital, Tilak Chand;
Nielsen, Torbjørn Kristian.
(2019)
Flow and efficiency measurements with clamp-on ultrasonic equipment.
Journal of Physics: Conference Series (JPCS).
volum 1266.
Vitenskapelig artikkel
-
Mdee, Ombeni John;
Kimambo, Cuthbert Z.M.;
Nielsen, Torbjørn Kristian;
Kihedu, Joseph.
(2019)
Analytical Evaluation of Head and Flow Rate Off-Design Characteristics for Pump as Turbine Application.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 141 (5).
Vitenskapelig artikkel
-
Nielsen, Torbjørn Kristian;
Svingen, Bjørnar;
Vilberg, Ingrid Kristine.
(2019)
The elastic property of water and penstock's effect on the governor stability.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (5).
Vitenskapelig artikkel
-
Perkunder, Magnus Farstad;
Nielsen, Torbjørn Kristian;
Faudot, Celine.
(2019)
Investigation of fluid transients in a penstock attached to a Francis turbine rig using seismic interferometry.
Journal of Physics: Conference Series (JPCS).
volum 1266 (1).
Vitenskapelig artikkel
-
Svarstad, Magni Fjørtoft;
Nielsen, Torbjørn Kristian.
(2019)
Pressure pulsations during a fast transition from pump to turbine mode of operation in laboratory and field experiment.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (8).
Vitenskapelig artikkel
-
Svingen, Bjørnar;
Nielsen, Torbjørn Kristian.
(2019)
Transient hydraulic calculations with a linear turbine model derived from a nonlinear synthetic model.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (5).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Dahlhaug, Ole Gunnar;
Storli, Pål-Tore Selbo;
Nielsen, Torbjørn Kristian.
(2019)
Francis-99 Workshop 3: Fluid structure interaction.
Journal of Physics: Conference Series (JPCS).
volum 1296 (1).
Vitenskapelig artikkel
-
Vilberg, Ingrid Kristine;
Kjeldsen, Morten;
Escaler, Xavier;
Ekanger, Jarle Vikør;
Nielsen, Torbjørn Kristian.
(2019)
Influence of draft tube water injection system on cavitation behaviour in a full-scale Francis turbine with visual access.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240.
Vitenskapelig artikkel
2018
-
Li, Deyou;
Wang, Hongjie;
Li, Zhenggui;
Nielsen, Torbjørn Kristian;
Goyal, Rahul;
Wei, Xianzhu;
Qin, Daqing.
(2018)
Transient characteristics during the closure of guide vanes in a pump-turbine in pump mode.
Renewable Energy.
volum 118.
Vitenskapelig artikkel
-
Storli, Pål-Tore Selbo;
Nielsen, Torbjørn Kristian.
(2018)
Simulation and Discussion of Models for Hydraulic Francis Turbine Simulations.
IFAC-PapersOnLine.
volum 51 (2).
Vitenskapelig artikkel
-
Svarstad, Magni Fjørtoft;
Nielsen, Torbjørn Kristian.
(2018)
Fast transition from pump to turbine mode of operation.
International Journal of Fluid Machinery and Systems.
volum 11 (3).
Vitenskapelig artikkel
2017
-
Cervantes, Michel;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2017)
Francis-99 Workshop 2: transient operation of Francis turbines.
Journal of Physics: Conference Series (JPCS).
volum 782 (1).
Leder
-
Gong, Ruzhi;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2017)
Blade passage modeling strategy for hydraulic turbine.
International Journal of Fluid Machinery and Systems.
volum 10 (4).
Vitenskapelig artikkel
-
Li, Deyou;
Wang, Hongjie;
Nielsen, Torbjørn Kristian;
Gong, Ruzhi;
Wei, Xianzhu;
Qin, Daqing.
(2017)
Influence of guide vane setting in pump mode on performance characteristics of a pump-turbine.
International Journal of Fluid Machinery and Systems.
volum 10 (2).
Vitenskapelig artikkel
-
Vereide, Kaspar;
Svingen, Bjørnar;
Nielsen, Torbjørn Kristian;
Lia, Leif.
(2017)
The Effect of Surge Tank Throttling on Governor Stability, Power Control, and Hydraulic Transients in Hydropower Plants.
IEEE transactions on energy conversion.
volum 32 (1).
Vitenskapelig artikkel
2016
-
Li, Deyou;
Wang, Hongjie;
Chen, Jinxia;
Nielsen, Torbjørn Kristian;
Qin, Daqing;
Wei, Xianzhu.
(2016)
Hysteresis characteristic in the hump region of a pump-turbine model.
Energies.
volum 9 (8).
Vitenskapelig artikkel
-
Li, Deyou;
Wang, Hongjie;
Nielsen, Torbjørn Kristian;
Gong, Ruzhi;
Wei, Xianzhu;
Qin, Daqing.
(2016)
Influence of guide vane setting in pump mode on performance characteristics of a pump-turbine.
IOP Conference Series: Earth and Environmental Science (EES).
volum 49 (4).
Vitenskapelig artikkel
-
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2016)
Experimental methods and design of a Pelton bucket.
2016. ISBN 978-82-326-0860-7. Doktoravhandlinger ved NTNU (2016:01).
Doktorgradsavhandling
-
Thapa, Biraj Singh;
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian;
Thapa, Bhola.
(2016)
Effects of sediment erosion in guide vanes of Francis turbines.
2016. ISBN 978-82-326-1859-0.
Doktorgradsavhandling
-
Vereide, Kaspar;
Lia, Leif;
Nielsen, Torbjørn Kristian.
(2016)
Hydraulics and Thermodynamics of Closed Surge Tanks for Hydropower Plants.
2016. ISBN 978-82-326-1386-1. Doktoravhandlinger ved NTNU (20).
Doktorgradsavhandling
-
Walseth, Eve Cathrin;
Nielsen, Torbjørn Kristian;
Svingen, Bjørnar.
(2016)
Measuring the dynamic characteristics of a low specific speed pump-Turbine model.
Energies.
volum 9 (3).
Vitenskapelig artikkel
-
Wiborg, Erik Jacques;
Nielsen, Torbjørn Kristian.
(2016)
Continuous Efficiency Measurements on Hydro Power Plants.
2016. ISBN 978-82-326-1998-6. Doktoravhandlinger ved NTNU (2016:330).
Doktorgradsavhandling
2015
-
Cervantes, Michel;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2015)
Francis-99 Workshop 1: steady operation of Francis turbines.
Journal of Physics: Conference Series (JPCS).
volum 579.
Leder
-
Escaler, Xavier;
Ekanger, Jarle Vikør;
Francke, Håkon Hjort;
Kjeldsen, Morten;
Nielsen, Torbjørn Kristian.
(2015)
Detection of Draft Tube Surge and Erosive Blade Cavitation in a Full-Scale Francis Turbine.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 137 (1).
Vitenskapelig artikkel
-
Nielsen, Torbjørn Kristian.
(2015)
Simulation model for Francis and Reversible Pump Turbines.
International Journal of Fluid Machinery and Systems.
volum 8 (3).
Vitenskapelig artikkel
-
Nocente, Alessandro;
Arslan, Tufan;
Nielsen, Torbjørn Kristian.
(2015)
Numerical Prediction of a Multistage Centrifugal Pump Performance With Stationary and Moving Mesh.
ASME 2015 Power Conference collocated with the ASME 2015 9th International Conference on Energy Sustainability, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum.
Vitenskapelig kapittel/artikkel
-
Nocente, Alessandro;
Arslan, Tufan;
Nielsen, Torbjørn Kristian.
(2015)
Numerical Simulation of Flow inside Centrifugal Pump by two different Solvers.
Proceedings of MekIT'15 Eighth National Conference on Computational Mechanics.
Vitenskapelig kapittel/artikkel
-
Vereide, Kaspar;
Lia, Leif;
Nielsen, Torbjørn Kristian.
(2015)
Hydraulic scale modelling and thermodynamics of mass oscillations in closed surge tanks.
Journal of Hydraulic Research.
volum 53 (4).
Vitenskapelig artikkel
-
Vereide, Kaspar;
Tekle, Torbjørn;
Nielsen, Torbjørn Kristian.
(2015)
Thermodynamic Behaviour and Heat Transfer in Closed Surge Tanks for Hydropower Plants.
Journal of Hydraulic Engineering.
volum 141 (6).
Vitenskapelig artikkel
2014
-
Kaunda, Chiyembekezo Suzgo;
Kimambo Z, Cuthbert;
Nielsen, Torbjørn Kristian.
(2014)
A numerical investigation of flow profile and performance of a low cost Crossflow turbine.
The International Journal of Energy and Environment.
volum 5 (3).
Vitenskapelig artikkel
-
Kaunda, Chiyembekezo Suzgo;
Kimambo, C.Z.;
Nielsen, Torbjørn Kristian.
(2014)
A technical discussion on microhydropower technology and its turbines.
Renewable & Sustainable Energy Reviews.
volum 35.
Vitenskapelig artikkel
-
Nielsen, Torbjørn Kristian;
Storli, Pål-Tore Selbo.
(2014)
Measurements and simulations of turbines on common grid.
IOP Conference Series: Earth and Environmental Science (EES).
volum 22 (4).
Vitenskapelig artikkel
-
Nielsen, Torbjørn Kristian;
Svarstad, Magni Fjørtoft.
(2014)
Unstable behaviour of RPT when testing turbine characteristics in the laboratory.
IOP Conference Series: Earth and Environmental Science (EES).
volum 22.
Vitenskapelig artikkel
-
Storli, Pål-Tore Selbo;
Nielsen, Torbjørn Kristian.
(2014)
Dynamic load on a Francis turbine runner from simulations based on measurements.
IOP Conference Series: Earth and Environmental Science (EES).
volum 22 (3).
Vitenskapelig artikkel
2013
-
Harby, Atle;
Sauterleute, Julian;
Korpås, Magnus;
Killingtveit, Ånund;
Solvang, Eivind;
Nielsen, Torbjørn Kristian.
(2013)
Pumped Storage Hydropower.
Transition to Renewable Energy Systems.
Vitenskapelig kapittel/artikkel
-
Nielsen, Torbjørn Kristian.
(2013)
Hydropower and pumped storage.
Handbook of Energy.
Vitenskapelig kapittel/artikkel
-
Zhao, Wei;
Billdal, Jan Tore;
Nielsen, Torbjørn Kristian;
Brekke, Håvard.
(2013)
Study on the leakage flow through a clearance gap between two stationary walls.
IOP Conference Series: Earth and Environmental Science (EES).
volum 15.
Vitenskapelig artikkel
2012
-
Olimstad, Grunde;
Nielsen, Torbjørn Kristian;
Børresen, Bjarne.
(2012)
Dependency on Runner Geometry for Reversible-Pump Turbine Characteristics in Turbine Mode of Operation.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 134 (12).
Vitenskapelig artikkel
-
Olimstad, Grunde;
Nielsen, Torbjørn Kristian;
Børresen, Bjarne.
(2012)
Stability Limits of Reversible-Pump Turbines in Turbine Mode of Operation and Measurements of Unstable Characteristics.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 134 (11).
Vitenskapelig artikkel
2011
-
Storli, Pål-Tore Selbo;
Nielsen, Torbjørn Kristian.
(2011)
Transient Friction in Pressurized Pipes. I: Investigation of Zielke's Model.
Journal of Hydraulic Engineering.
volum 137 (5).
Vitenskapelig artikkel
-
Storli, Pål-Tore Selbo;
Nielsen, Torbjørn Kristian.
(2011)
Transient Friction in Pressurized Pipes. II: Two-Coefficient Instantaneous Acceleration-Based Model.
Journal of Hydraulic Engineering.
volum 137 (6).
Vitenskapelig artikkel
-
Storli, Pål-Tore Selbo;
Nielsen, Torbjørn Kristian.
(2011)
Transient Friction in Pressurized Pipes. III: Investigation of the EIT Model Based on Position-Dependent Coefficient Approach in MIAB Model.
Journal of Hydraulic Engineering.
volum 137 (9).
Vitenskapelig artikkel
2010
-
Doorman, Gerard L.;
Killingtveit, Ånund;
Nielsen, Torbjørn Kristian.
(2010)
Norsk vannkraft og klimatrusselen.
Adresseavisen.
Kronikk
-
Ramdal, Jørgen;
Nielsen, Torbjørn Kristian;
Jonsson, Pontus P..
(2010)
Influence from bends on a pressure-time measurement.
IOP Conference Series: Earth and Environmental Science (EES).
volum 12 (1).
Vitenskapelig artikkel
2007
-
Antonsen, Øyvind;
Nielsen, Torbjørn Kristian.
(2007)
Unsteady flow in wicket gate and runner with focus on static and dynamic load on runner.
2007. ISBN 978-82-471-3392-7.
Doktorgradsavhandling
2002
-
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2002)
Status for mini- og mikrokraftverk i Norge.
2002.
Rapport
-
Nielsen, Torbjørn Kristian.
(2002)
Status for mini- og mikrovannkraftverk i Norge.
2002.
Rapport
1990
-
Nielsen, Torbjørn Kristian.
(1990)
Transient Characteristics of High Head Francis Turbines.
1990. ISBN 82-7119-242-6.
Doktorgradsavhandling
Vitenskapelige artikler
-
Kelele, Hailay Kiros;
Frøyd, Lars;
Kahsay, Mulu Bayray;
Nielsen, Torbjørn Kristian.
(2022)
Characterization of Aerodynamics of Small Wind Turbine Blade for Enhanced Performance and Low Cost of Energy.
Energies.
volum 15 (21).
Vitenskapelig artikkel
-
Kelele, Hailay Kiros;
Nielsen, Torbjørn Kristian;
Froyd, Lars;
Kahsay, Mulu Bayray.
(2020)
Catchment Based Aerodynamic Performance Analysis of Small Wind Turbine Using a Single Blade Concept for a Low Cost of Energy.
Energies.
volum 13 (21).
Vitenskapelig artikkel
-
Dhital, Tilak Chand;
Nielsen, Torbjørn Kristian.
(2019)
Flow and efficiency measurements with clamp-on ultrasonic equipment.
Journal of Physics: Conference Series (JPCS).
volum 1266.
Vitenskapelig artikkel
-
Mdee, Ombeni John;
Kimambo, Cuthbert Z.M.;
Nielsen, Torbjørn Kristian;
Kihedu, Joseph.
(2019)
Analytical Evaluation of Head and Flow Rate Off-Design Characteristics for Pump as Turbine Application.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 141 (5).
Vitenskapelig artikkel
-
Nielsen, Torbjørn Kristian;
Svingen, Bjørnar;
Vilberg, Ingrid Kristine.
(2019)
The elastic property of water and penstock's effect on the governor stability.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (5).
Vitenskapelig artikkel
-
Perkunder, Magnus Farstad;
Nielsen, Torbjørn Kristian;
Faudot, Celine.
(2019)
Investigation of fluid transients in a penstock attached to a Francis turbine rig using seismic interferometry.
Journal of Physics: Conference Series (JPCS).
volum 1266 (1).
Vitenskapelig artikkel
-
Svarstad, Magni Fjørtoft;
Nielsen, Torbjørn Kristian.
(2019)
Pressure pulsations during a fast transition from pump to turbine mode of operation in laboratory and field experiment.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (8).
Vitenskapelig artikkel
-
Svingen, Bjørnar;
Nielsen, Torbjørn Kristian.
(2019)
Transient hydraulic calculations with a linear turbine model derived from a nonlinear synthetic model.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (5).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Dahlhaug, Ole Gunnar;
Storli, Pål-Tore Selbo;
Nielsen, Torbjørn Kristian.
(2019)
Francis-99 Workshop 3: Fluid structure interaction.
Journal of Physics: Conference Series (JPCS).
volum 1296 (1).
Vitenskapelig artikkel
-
Vilberg, Ingrid Kristine;
Kjeldsen, Morten;
Escaler, Xavier;
Ekanger, Jarle Vikør;
Nielsen, Torbjørn Kristian.
(2019)
Influence of draft tube water injection system on cavitation behaviour in a full-scale Francis turbine with visual access.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240.
Vitenskapelig artikkel
-
Li, Deyou;
Wang, Hongjie;
Li, Zhenggui;
Nielsen, Torbjørn Kristian;
Goyal, Rahul;
Wei, Xianzhu;
Qin, Daqing.
(2018)
Transient characteristics during the closure of guide vanes in a pump-turbine in pump mode.
Renewable Energy.
volum 118.
Vitenskapelig artikkel
-
Storli, Pål-Tore Selbo;
Nielsen, Torbjørn Kristian.
(2018)
Simulation and Discussion of Models for Hydraulic Francis Turbine Simulations.
IFAC-PapersOnLine.
volum 51 (2).
Vitenskapelig artikkel
-
Svarstad, Magni Fjørtoft;
Nielsen, Torbjørn Kristian.
(2018)
Fast transition from pump to turbine mode of operation.
International Journal of Fluid Machinery and Systems.
volum 11 (3).
Vitenskapelig artikkel
-
Gong, Ruzhi;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2017)
Blade passage modeling strategy for hydraulic turbine.
International Journal of Fluid Machinery and Systems.
volum 10 (4).
Vitenskapelig artikkel
-
Li, Deyou;
Wang, Hongjie;
Nielsen, Torbjørn Kristian;
Gong, Ruzhi;
Wei, Xianzhu;
Qin, Daqing.
(2017)
Influence of guide vane setting in pump mode on performance characteristics of a pump-turbine.
International Journal of Fluid Machinery and Systems.
volum 10 (2).
Vitenskapelig artikkel
-
Vereide, Kaspar;
Svingen, Bjørnar;
Nielsen, Torbjørn Kristian;
Lia, Leif.
(2017)
The Effect of Surge Tank Throttling on Governor Stability, Power Control, and Hydraulic Transients in Hydropower Plants.
IEEE transactions on energy conversion.
volum 32 (1).
Vitenskapelig artikkel
-
Li, Deyou;
Wang, Hongjie;
Chen, Jinxia;
Nielsen, Torbjørn Kristian;
Qin, Daqing;
Wei, Xianzhu.
(2016)
Hysteresis characteristic in the hump region of a pump-turbine model.
Energies.
volum 9 (8).
Vitenskapelig artikkel
-
Li, Deyou;
Wang, Hongjie;
Nielsen, Torbjørn Kristian;
Gong, Ruzhi;
Wei, Xianzhu;
Qin, Daqing.
(2016)
Influence of guide vane setting in pump mode on performance characteristics of a pump-turbine.
IOP Conference Series: Earth and Environmental Science (EES).
volum 49 (4).
Vitenskapelig artikkel
-
Walseth, Eve Cathrin;
Nielsen, Torbjørn Kristian;
Svingen, Bjørnar.
(2016)
Measuring the dynamic characteristics of a low specific speed pump-Turbine model.
Energies.
volum 9 (3).
Vitenskapelig artikkel
-
Escaler, Xavier;
Ekanger, Jarle Vikør;
Francke, Håkon Hjort;
Kjeldsen, Morten;
Nielsen, Torbjørn Kristian.
(2015)
Detection of Draft Tube Surge and Erosive Blade Cavitation in a Full-Scale Francis Turbine.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 137 (1).
Vitenskapelig artikkel
-
Nielsen, Torbjørn Kristian.
(2015)
Simulation model for Francis and Reversible Pump Turbines.
International Journal of Fluid Machinery and Systems.
volum 8 (3).
Vitenskapelig artikkel
-
Vereide, Kaspar;
Lia, Leif;
Nielsen, Torbjørn Kristian.
(2015)
Hydraulic scale modelling and thermodynamics of mass oscillations in closed surge tanks.
Journal of Hydraulic Research.
volum 53 (4).
Vitenskapelig artikkel
-
Vereide, Kaspar;
Tekle, Torbjørn;
Nielsen, Torbjørn Kristian.
(2015)
Thermodynamic Behaviour and Heat Transfer in Closed Surge Tanks for Hydropower Plants.
Journal of Hydraulic Engineering.
volum 141 (6).
Vitenskapelig artikkel
-
Kaunda, Chiyembekezo Suzgo;
Kimambo Z, Cuthbert;
Nielsen, Torbjørn Kristian.
(2014)
A numerical investigation of flow profile and performance of a low cost Crossflow turbine.
The International Journal of Energy and Environment.
volum 5 (3).
Vitenskapelig artikkel
-
Kaunda, Chiyembekezo Suzgo;
Kimambo, C.Z.;
Nielsen, Torbjørn Kristian.
(2014)
A technical discussion on microhydropower technology and its turbines.
Renewable & Sustainable Energy Reviews.
volum 35.
Vitenskapelig artikkel
-
Nielsen, Torbjørn Kristian;
Storli, Pål-Tore Selbo.
(2014)
Measurements and simulations of turbines on common grid.
IOP Conference Series: Earth and Environmental Science (EES).
volum 22 (4).
Vitenskapelig artikkel
-
Nielsen, Torbjørn Kristian;
Svarstad, Magni Fjørtoft.
(2014)
Unstable behaviour of RPT when testing turbine characteristics in the laboratory.
IOP Conference Series: Earth and Environmental Science (EES).
volum 22.
Vitenskapelig artikkel
-
Storli, Pål-Tore Selbo;
Nielsen, Torbjørn Kristian.
(2014)
Dynamic load on a Francis turbine runner from simulations based on measurements.
IOP Conference Series: Earth and Environmental Science (EES).
volum 22 (3).
Vitenskapelig artikkel
-
Zhao, Wei;
Billdal, Jan Tore;
Nielsen, Torbjørn Kristian;
Brekke, Håvard.
(2013)
Study on the leakage flow through a clearance gap between two stationary walls.
IOP Conference Series: Earth and Environmental Science (EES).
volum 15.
Vitenskapelig artikkel
-
Olimstad, Grunde;
Nielsen, Torbjørn Kristian;
Børresen, Bjarne.
(2012)
Dependency on Runner Geometry for Reversible-Pump Turbine Characteristics in Turbine Mode of Operation.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 134 (12).
Vitenskapelig artikkel
-
Olimstad, Grunde;
Nielsen, Torbjørn Kristian;
Børresen, Bjarne.
(2012)
Stability Limits of Reversible-Pump Turbines in Turbine Mode of Operation and Measurements of Unstable Characteristics.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 134 (11).
Vitenskapelig artikkel
-
Storli, Pål-Tore Selbo;
Nielsen, Torbjørn Kristian.
(2011)
Transient Friction in Pressurized Pipes. I: Investigation of Zielke's Model.
Journal of Hydraulic Engineering.
volum 137 (5).
Vitenskapelig artikkel
-
Storli, Pål-Tore Selbo;
Nielsen, Torbjørn Kristian.
(2011)
Transient Friction in Pressurized Pipes. II: Two-Coefficient Instantaneous Acceleration-Based Model.
Journal of Hydraulic Engineering.
volum 137 (6).
Vitenskapelig artikkel
-
Storli, Pål-Tore Selbo;
Nielsen, Torbjørn Kristian.
(2011)
Transient Friction in Pressurized Pipes. III: Investigation of the EIT Model Based on Position-Dependent Coefficient Approach in MIAB Model.
Journal of Hydraulic Engineering.
volum 137 (9).
Vitenskapelig artikkel
-
Ramdal, Jørgen;
Nielsen, Torbjørn Kristian;
Jonsson, Pontus P..
(2010)
Influence from bends on a pressure-time measurement.
IOP Conference Series: Earth and Environmental Science (EES).
volum 12 (1).
Vitenskapelig artikkel
Tidsskriftspublikasjoner
-
Cervantes, Michel;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2017)
Francis-99 Workshop 2: transient operation of Francis turbines.
Journal of Physics: Conference Series (JPCS).
volum 782 (1).
Leder
-
Cervantes, Michel;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2015)
Francis-99 Workshop 1: steady operation of Francis turbines.
Journal of Physics: Conference Series (JPCS).
volum 579.
Leder
-
Doorman, Gerard L.;
Killingtveit, Ånund;
Nielsen, Torbjørn Kristian.
(2010)
Norsk vannkraft og klimatrusselen.
Adresseavisen.
Kronikk
Del av bok/rapport
-
Cavazzini, Giovanna;
Storli, Pål-Tore Selbo;
Nielsen, Torbjørn Kristian.
(2021)
Hydropower.
World Scientific Series in Current Energy Issues: Volume 7 Wind, Water and Fire The Other Renewable Energy Resources.
Vitenskapelig kapittel/artikkel
-
Nocente, Alessandro;
Arslan, Tufan;
Nielsen, Torbjørn Kristian.
(2015)
Numerical Prediction of a Multistage Centrifugal Pump Performance With Stationary and Moving Mesh.
ASME 2015 Power Conference collocated with the ASME 2015 9th International Conference on Energy Sustainability, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum.
Vitenskapelig kapittel/artikkel
-
Nocente, Alessandro;
Arslan, Tufan;
Nielsen, Torbjørn Kristian.
(2015)
Numerical Simulation of Flow inside Centrifugal Pump by two different Solvers.
Proceedings of MekIT'15 Eighth National Conference on Computational Mechanics.
Vitenskapelig kapittel/artikkel
-
Harby, Atle;
Sauterleute, Julian;
Korpås, Magnus;
Killingtveit, Ånund;
Solvang, Eivind;
Nielsen, Torbjørn Kristian.
(2013)
Pumped Storage Hydropower.
Transition to Renewable Energy Systems.
Vitenskapelig kapittel/artikkel
-
Nielsen, Torbjørn Kristian.
(2013)
Hydropower and pumped storage.
Handbook of Energy.
Vitenskapelig kapittel/artikkel
Rapport
-
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2016)
Experimental methods and design of a Pelton bucket.
2016. ISBN 978-82-326-0860-7. Doktoravhandlinger ved NTNU (2016:01).
Doktorgradsavhandling
-
Thapa, Biraj Singh;
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian;
Thapa, Bhola.
(2016)
Effects of sediment erosion in guide vanes of Francis turbines.
2016. ISBN 978-82-326-1859-0.
Doktorgradsavhandling
-
Vereide, Kaspar;
Lia, Leif;
Nielsen, Torbjørn Kristian.
(2016)
Hydraulics and Thermodynamics of Closed Surge Tanks for Hydropower Plants.
2016. ISBN 978-82-326-1386-1. Doktoravhandlinger ved NTNU (20).
Doktorgradsavhandling
-
Wiborg, Erik Jacques;
Nielsen, Torbjørn Kristian.
(2016)
Continuous Efficiency Measurements on Hydro Power Plants.
2016. ISBN 978-82-326-1998-6. Doktoravhandlinger ved NTNU (2016:330).
Doktorgradsavhandling
-
Antonsen, Øyvind;
Nielsen, Torbjørn Kristian.
(2007)
Unsteady flow in wicket gate and runner with focus on static and dynamic load on runner.
2007. ISBN 978-82-471-3392-7.
Doktorgradsavhandling
-
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2002)
Status for mini- og mikrokraftverk i Norge.
2002.
Rapport
-
Nielsen, Torbjørn Kristian.
(2002)
Status for mini- og mikrovannkraftverk i Norge.
2002.
Rapport
-
Nielsen, Torbjørn Kristian.
(1990)
Transient Characteristics of High Head Francis Turbines.
1990. ISBN 82-7119-242-6.
Doktorgradsavhandling
Formidling
2018
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Vitenskapelig foredragNielsen, Torbjørn Kristian; Svingen, Bjørnar; Vilberg, Ingrid Kristine. (2018) The elastic property of water and penstock’s effect on the governor stability. 29th IAHR Symposium on Hydraulic Machinery and Systems . IAHR; Kyoto. 2018-09-16 - 2018-09-21.
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Populærvitenskapelig foredragNydal, Ole Jørgen; Nielsen, Torbjørn Kristian. (2018) African University Collaboration on Renewable Energy. Innspill seminar NTNU . NTNU; Trondheim. 2018-01-11 - 2018-01-11.
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Vitenskapelig foredragSvingen, Bjørnar; Nielsen, Torbjørn Kristian. (2018) First principles approach linear model for hydraulic turbines suitable for use in available simulation platforms. Pressure Surges 2018 . BHR Group; Bordeaux. 2018-11-14 - 2018-11-16.
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Vitenskapelig foredragSvingen, Bjørnar; Nielsen, Torbjørn Kristian. (2018) Transient Hydraulic Calculations with a Linear Turbine Model derived from a Nonlinear Synthetic Model. 29th IAHR Symposium on Hydraulic Machinery and Systems . IAHR; Kyoto. 2018-09-16 - 2018-09-21.
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Vitenskapelig foredragVilberg, Ingrid Kristine; Kjeldsen, Morten; Arndt, Roger E. A.; Nielsen, Torbjørn Kristian. (2018) The effect of gas content on cavitation shedding and test facility dynamics. 10th International Symposium on Cavitation (CAV2018) ; 2018-05-14 - 2018-05-16.
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Vitenskapelig foredragVilberg, Ingrid Kristine; Kjeldsen, Morten; Svingen, Bjørnar; Nielsen, Torbjørn Kristian. (2018) Experimental assessment of pressure pulsations and transient characteristics of a 1400 m pipe line. Pressure Surges 2018 . BHR Group; Bordeaux. 2018-11-14 - 2018-11-16.
2016
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Faglig foredragNocente, Alessandro; Arslan, Tufan; Jasinski, Daniel; Nielsen, Torbjørn Kristian. (2016) A Study of Flow inside a Centrifugal Pump: High Performance Numerical Simulations Using GPU cards. ISROMAC16 - International Symposium on Transport Phenomena and Dynamics of Rotating Machinery ; Honolulu, HI. 2016-04-10 - 2016-04-15.
2014
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IntervjuSnøfugl, Ingvil; Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar; Lia, Leif. (2014) Nytt vannkraftsenter skal lokke ungdom vekk fra oljebransjen. Teknisk Ukeblad nettavis [Internett]. 2014-02-10.
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IntervjuStorli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian; Lundgren, Silje Strand. (2014) Vannkraft: Europas grønne batteri. Under Dusken [Tidsskrift]. 2014-03-11.
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Vitenskapelig foredragVereide, Kaspar; Lia, Leif; Nielsen, Torbjørn Kristian. (2014) Physical Modelling of Hydropower Waterway with Air Cushion Surge Chamber (ISBN 9781742721156). 5th International Symposium on Hydraulic Structures . IAHR; Brisbane. 2014-06-25 - 2014-06-25.
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Faglig foredragWiborg, Erik Jacques; Hulaas, Harald; Francke, Håkon Hjort; Nielsen, Torbjørn Kristian. (2014) Applied statistical quality control on field measurement data. IGHEM 2014 . International Gruop of Hydro Efficiency Measurements; Itajuba. 2014-09-06 - 2014-09-19.
2013
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Vitenskapelig foredragHarby, Atle; Sauterleute, Julian; Korpås, Magnus; Killingtveit, Ånund; Solvang, Eivind; Nielsen, Torbjørn Kristian. (2013) Pumped Storage Hydropower. 3rd International Conference on Energy Process Engineering . DECHEMA; Frankfurt am Main. 2013-06-04 - 2013-06-06.
2012
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Vitenskapelig foredragOlimstad, Grunde; Nielsen, Torbjørn Kristian; Børresen, Bjarne. (2012) A Two-Dimensional Model for Pump-Turbine Instability Investigations. ISROMAC ; 2012-02-27 - 2012-03-03.
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Vitenskapelig foredragOlimstad, Grunde; Nielsen, Torbjørn Kristian; Børresen, Bjarne. (2012) Geomatry Impact on Pump-Turbine Characteristics. ISROMAC ; Honolulu. 2012-02-27 - 2012-03-03.
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Vitenskapelig foredragWalseth, Eve Cathrin; Svingen, Bjørnar; Nielsen, Torbjørn Kristian. (2012) Comprehensive experimental study of instability in a reversible pump-turbine model at no-load operation. Hydro 2012 ; 2012-10-29 - 2012-10-31.
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Vitenskapelig foredragWalseth, Eve Cathrin; Svingen, Bjørnar; Nielsen, Torbjørn Kristian. (2012) Investigation of a 1D-model for simulating the characteristics of a high head Francis turbine. 14th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery. ISROMAC-14 . Technische Universität Darmstadt; Honolulu, Hawaii. 2012-02-27 - 2012-03-02.
2011
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Vitenskapelig foredragStorli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2011) The quality of Norwegian grid frequency and the consequences for pumped storage. Pumped Storage Powerplants . SHF; Lyon. 2011-11-23 - 2011-11-24.
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Vitenskapelig foredragWalseth, Eve Cathrin; Svingen, Bjørnar; Nielsen, Torbjørn Kristian. (2011) Investigating the effect of turbine characteristics on the pressure response of a system. IAHR 4th international conference on cavitation and dynamic problems in hydraulic machinery and systems . IAHR; Beograd. 2011-10-26 - 2011-10-28.
2010
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Vitenskapelig foredragJonsson, Pontus P.; Ramdal, Jørgen; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar; Cervantes, Michel. (2010) The Pressure-Time measurements project at LTU and NTNU. International Group for Hydraulic Efficiency Measurements . Indian Institute of Technology / IGHEM; Roorkee. 2010-10-21 - 2010-10-23.
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Vitenskapelig foredragKobro, Einar; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar. (2010) Data Analysis From Onboard Francis Model Runner Pressure Measurements. The 13th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery . University of Tokyo, Japan; Honolulu, Hawaii. 2010-04-04 - 2010-04-09.
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Vitenskapelig foredragNielsen, Torbjørn Kristian; Olimstad, Grunde. (2010) Dynamic Behaviour of Reversible Pump-Turbines in Turbine Mode of Operation. ISROMAC ; 2010-04-04 - 2010-04-07.
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Vitenskapelig foredragRamdal, Jørgen; Jonsson, Pontus P.; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar; Cervantes, Michel. (2010) Uncertainties for Pressure-Time Efficiency Measurements. International Group for Hydraulic Efficiency Measurements . Indian Institute of Technology; Roorkee. 2010-10-21 - 2010-10-23.
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Vitenskapelig foredragRamdal, Jørgen; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar. (2010) UNCERTAINTY AND PERFORMANCE OF A LOW HEAD THERMODYNAMIC MEASUREMENT. International Group for Hydraulic Efficiency Measurements . Indian Institute of Technology / IGHEM; Roorkee. 2010-10-21 - 2010-10-23.
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Vitenskapelig foredragWalseth, Eve Cathrin; Nielsen, Torbjørn Kristian. (2010) Reversible Pumped Hydro-Benefits and Challenges. Renewable Energy Research Conference . The Centre for Renewable Energy; Trondheim. 2010-06-07 - 2010-06-08.
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Vitenskapelig foredragZhao, Wei; Nielsen, Torbjørn Kristian; Billdal, Jan Tore. (2010) An Experimental Study on Leakage Flow in Different Geometrical Disk Seals. 9th International Conference on Hydrodynamics ; Shanghai. 2010-10-11 - 2010-10-15.
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Vitenskapelig foredragZhao, Wei; Nielsen, Torbjørn Kristian; Billdal, Jan Tore. (2010) Effects of Cavity on Leakage Loss in Straight-though Labyrinth Seals. 25th IAHR Symposium on Hydraulic Machinery and Systems ; Timisoara. 2010-09-20 - 2010-09-24.
2009
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Vitenskapelig foredragKobro, Einar; Gamboa, Alphonse; Bloch, Reinhard; Nielsen, Torbjørn Kristian. (2009) ONBOARD PRESSURE MEASUREMENT IN HIGH HEAD FRANCIS PROTOTYPE RUNNERS. 3rd IAHR International Meeting of the Workgroup on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems, . IAHR; Brno. 2009-10-14 - 2009-10-16.
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Populærvitenskapelig foredragNielsen, Torbjørn Kristian. (2009) Hva betur turbinvirkningsgraden på inntekten. Småkraftverk konferanse . Energi Norge; Gardermoen. 2009-03-09.
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Populærvitenskapelig foredragNielsen, Torbjørn Kristian. (2009) Hydro Power. ISFIT 09 . ISFIT/NTNU; Trondheim. 2009-09-08 - 2009-09-09.
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Vitenskapelig foredragNielsen, Torbjørn Kristian. (2009) System Dynamics in Hydro Power. 3rd Nordic Conference in Fluid Dynamics . Vattenfall; Köbenhavn. 2009-09-15 - 2009-09-16.
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Populærvitenskapelig foredragNielsen, Torbjørn Kristian. (2009) Vannkraft i verden. Maskinmøte 09 . Energi Norge; Trondheim. 2009-12-10.
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Vitenskapelig foredragRamdal, Jørgen; Jonsson, Pontus P.; Nielsen, Torbjørn Kristian; Cervantes, Michel. (2009) Finding Inertia Constants for Bends related to a Modified Gibson Method. 3rd IAHR International Meeting of the Workgroup on Cavitation and Dynamic Problems in Hyrdraulic Machinery and System . IAHR; Brno. 2009-10-14 - 2009-10-16.
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PosterRamdal, Jørgen; Nielsen, Torbjørn Kristian; Jonsson, Pontus P.; Cervantes, Michel. (2009) FINDING INERTIA TIME CONSTANTS FOR BENDS RELATED TO A MODIFIED GIBSON’S METHOD. 3rd IAHR Int. meeting of the workgroup on cavitation and dynamic problems in Hydarulic machinery . IAHR; Brno. 2009-10-14 - 2009-10-16.
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Vitenskapelig foredragStorli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2009) Curved friction coefficients for better fit with experimental results. International Meeting on “Unsteady friction in pipes, ducts and channels” . Deltares; Delft. 2009-05-06 - 2009-05-07.
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Vitenskapelig foredragStorli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2009) Improving the performance of instantaneous acceleration based models using curved coefficients. 3rd Internartional Meeting of the Workgroup on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems . IAHR; Brno. 2009-10-14 - 2009-10-16.
2008
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Vitenskapelig foredragKobro, Einar; Dahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian. (2008) Onboard Pressure Measurement In Francis Model Runner Blades. 24th IAHR Symposium on Hydraulic Machinery and Systems . IAHR; Foz do Iguazzu. 2008-10-27 - 2008-10-31.
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Vitenskapelig foredragRamdal, Jørgen; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar. (2008) Decreasing uncertainty in thermodynamic measurement. IAHR Symposium on Hydraulic Machinery and systems . IAHR; Foz do Iguassu, Brazil. 2008-10-27 - 2008-10-31.
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Vitenskapelig foredragStorli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2008) NON- STATIONARY, FREQUENCY DEPENDENT FRICTION IN HYDRAULIC PIPE SYSTEMS; AN INVESTIGATION OF THE ZIELKE MODEL. 24th IAHR Symposium on Hydraulic Machinery and Systems ; 2008-10-27 - 2008-10-31.
2006
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Vitenskapelig foredragAntonsen, Øyvind; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar. (2006) Experimental and Theoretical Investigations of the Flow Field at the Inlet of a Francis Runner. HydroVision 2006 . HCI-Publication; Portland, Oregon. 2006-08-01 - 2006-08-04.
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Vitenskapelig foredragAntonsen, Øyvind; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar; Billdal, Jan Tore. (2006) Pressure pulses in Francis Turbines vs. guide vane design. 23rd IAHR Symposium on Hydraulic Machinery and Systems . The Int. Association of Hydraulic Engineering and Research; Yokohama. 2006-10-17 - 2006-10-21.
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Vitenskapelig foredragDahlhaug, Ole Gunnar; Kobro, Einar; Skåre, Per Egil; Nielsen, Torbjørn Kristian; Thapa, Bhola. (2006) Efficiency loss in Pelton buckets due to sediment erosion. 23rd IAHR Symposium on Hydraulic Machinery and Systems . The Int. Association of Hydraulic Engineering and Research; Yokohama. 2006-10-17 - 2006-10-21.
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Vitenskapelig foredragDahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian; Brandåstrø, Bård Aslak; Francke, Håkon Hjort; Hulaas, Harald. (2006) Comparison between pressure-time and thermodynamic efficiency measurements on a low head turbine. IGHEM 2006 . The International Group for Hydraulic Efficiency Measurement; Portland, Oregon. 2006-07-30 - 2006-08-01.
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Vitenskapelig foredragKjeldsen, Morten; Olsen, Knut Magne; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar. (2006) Water injection for the mitigation of draft tube pressure pulsations. IAHR Int. Meeting on Cavitation and Dynamic Problems . IAHR; Barcelona. 2006-06-28 - 2006-06-30.
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Vitenskapelig foredragNielsen, Torbjørn Kristian; Røyrvik, Johnny; Ramdal, Jørgen; Dahlhaug, Ole Gunnar. (2006) Propeller turbine with two contra-rotating impellers and built in generators. 23th IAHR Symposium . IAHR; Yokohama. 2006-10-17 - 2006-10-20.
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Vitenskapelig foredragSvingen, Bjørnar; Brekke, Terje; Skaare, Per Egil; Nielsen, Torbjørn Kristian. (2006) Minimizing oscillations and transients for large and rapid changes in power output from hydro power plants by new control algorithms. 23th IAHR Symposium . IAHR; Yokohama. 2006-10-17 - 2006-10-20.
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Vitenskapelig foredragSvingen, Bjørnar; Nielsen, Torbjørn Kristian; Skaare, Per Egil. (2006) On transient problems in Norwegian Power Plants, and solution by transient analysis and interactive simulators using LVTrans. IAHR International meeting of WG on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems . IAHR; Barcelona. 2006-06-20 - 2006-06-30.
2005
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Vitenskapelig foredragDahlhaug, Ole Gunnar; Thapa, Bhola; Nielsen, Torbjørn Kristian; Ruud, Jonas Jessen. (2005) Thermodynamic efficiency measurement of Khimti Hydropower Plant and assessment of sand erosion on turbine components. Hydropwer �05, The Backbone of Sustainable Energy Supply. . International Center for Hydropower, ICH; Stavanger. 2005-05-23 - 2005-05-25.
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IntervjuNielsen, Torbjørn Kristian. (2005) Bygger kraftverk under vann. Teknisk ukeblad [Avis]. 2005-07-23.
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IntervjuNielsen, Torbjørn Kristian. (2005) Distriktsnyheter Sogn og fjordane vedr. bølgekraft. NRK Sogn og fjordane [Radio]. 2005-06-25.
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Populærvitenskapelig foredragNielsen, Torbjørn Kristian. (2005) Fornybar energi i startgropa-salt, bølger, havstrøm og sol. Norges energidager 2005 . Norges vassdrags- og energidirektorat; Oslo. 2005-10-20 - 2005-10-21.
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IntervjuNielsen, Torbjørn Kristian. (2005) Opp av bølgedalen. Ukeavisen Ledelse, Nyskaping [Avis]. 2005-12-01.
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IntervjuNielsen, Torbjørn Kristian. (2005) Ubegripelig kraftsatsing. Teknisk ukeblad [Avis]. 2005-07-23.
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IntervjuNielsen, Torbjørn Kristian. (2005) Vil ta kraft fra bølgene. Dagens Næringsliv [Avis]. 2005-06-24.
2004
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Intervju0lsen, Claude R.; Falnes, Johannes; Nielsen, Torbjørn Kristian; Rostrup, Jørgen. (2004) Nytt liv for bølgekraften. EuroPower, juni 2004, 2(6) , vedlegg til Dagens Næringsliv [Avis]. 2004-06-25.
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Vitenskapelig foredragAntonsen, Øyvind; Nielsen, Torbjørn Kristian. (2004) CFD simulation of von Karman vortex shedding. IAHR Symposium . IAHR, VAttenfall; Stockholm. 2004-06-29 - 2004-07-02.
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Vitenskapelig foredragNielsen, Torbjørn Kristian. (2004) Frequency and load regulatig ability of water power plants exposed to Load ramping. IAHR Symposium . IAHR, Vattenfall; Stockholm. 2004-06-29 - 2004-07-02.
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Vitenskapelig foredragPettersen, Kristin; Nielsen, Torbjørn Kristian; Billdal, Jan Tore. (2004) An explanation to steep speed-flow characteristics of RPTs. IAHR Symposium . IAHR, Vattenfall; Stockholm. 2004-06-29 - 2004-07-02.
2003
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Vitenskapelig foredragNielsen, Torbjørn Kristian. (2003) Om turbiner og anlegg for små vannkraftverk. Norsk Elektroteknisk forening; Dagseminar småkraftverk . [Mangler data]; Oslo. 2003-10-30.
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ProgramdeltagelseNielsen, Torbjørn Kristian. (2003) Schrødingers katt: uttalelse om nytt elvekraft konsept. NRK, Schrødingers katt [TV]. 2003-11-27.
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Vitenskapelig foredragNielsen, Torbjørn Kristian; Antonsen, Øyvind. (2003) CFD simulation of von Karman vortex shedding. IAHR Work Group . [Mangler data]; Stuttgart, Germany. 2003-10-10.