• Determination of Minimum Propulsion Power to Maintain the Manoeuvrability of Ships in Adverse Conditions 

      Slettevold, Yngvild (Master thesis, 2014)
      The Energy Efficiency Design Index (EEDI), quantifying the amount of carbon dioxide emitted per gram fuel consumed, is to be fully implemented in the coming years. Compliance with the EEDI requirements can be achieved in ...
    • Development of a Method for Weather Routing of Ships 

      Eskild, Hege (Master thesis, 2014)
      Weather routing is a method within ship routing that is used to avoid rough weather and to find the minimal fuel, time or cost route between ports. Several methods and different software exit and are available to the ship ...
    • Development of a numerical simulation model of the forces on ventilating propellers 

      Hvidsten, Erik (Master thesis, 2014)
      Ships and marine structures operating with propellers will from time to time experience severe, instantaneous thrust and torque losses to air drawing to the propeller. This is known as ventilation, and it may cause serious ...
    • Development of a Simulation Model for Propeller Performance 

      Dalheim, Øyvind Øksnes (Master thesis, 2015)
      The simulation model PropSiM for simulation of propeller performance has been developed and implemented into Simulink. The simulation model generates a time domain solution to the six degree of freedom propeller forces in ...
    • Distributed propulsion for ships 

      Nylund, Vilde (Master thesis, 2017)
      It is anticipated that using distributed electric propulsion (DEP) on conventional ships will increase the total propulsive efficiency. This is mainly due to two reasons; firstly, because the total propeller disk area can ...
    • Dynamics of a Marine Propulsion System With a Diesel Engine and a Propeller Subject To Waves 

      Taskar, Bhushan; Yum, Koosup; Pedersen, Eilif; Steen, Sverre (Chapter; Peer reviewed, 2015)
      When travelling in waves, the efficiency of the propulsion system is in most cases reduced, due to a variety of different effects. Traditionally, the performance of propeller and engine is analyzed separately. However, ...
    • Effect of change of propulsion system on M/S Midnatsol 

      Hasfjord, Nikolai (Master thesis, 2017)
      In 2016 the costal liner M/S Midnatsol had her main thruster system changed from the twin fixed pitch contrarotating thruster system Contaz to the twin controllable pitch Azipull thruster system. The purpose of this thesis ...
    • Effect of waves on cavitation and pressure pulses 

      Taskar, Bhushan; Steen, Sverre; Bensow, Rickard E; Schröder, Björn (Journal article, 2016)
      In view of environmental concerns, there is increasing demand to optimize the ships for the actual operating condition rather than for calm water. Now, in order to apply this for propeller design, a first step would be to ...
    • Effect of waves on cavitation and pressure pulses of a tanker with twin podded propulsion 

      Taskar, Bhushan; Steen, Sverre; Eriksson, Jonas (Journal article, 2017)
      There is increasing interest in optimizing ships for the actual operating condition rather than just for calm water. In order to optimize the propeller designs for operations in waves, it is essential to study how the ...
    • Empirical Prediction of Residuary Resistance of Fast Catamarans 

      Førrisdal, Even Wollebæk (Master thesis, 2018)
      This thesis focuses on resistance of fast displacement catamarans, with the purpose of developing an empirical residuary resistance estimation method based on artificial neural networks. The study builds on work carried ...
    • Empirical prediction of resistance of fishing vessels 

      Kleppestø, Kristoffer (Master thesis, 2015)
      The possibility to use Artificial Neural Network for estimating ship resistance and propulsion coefficients are investigated. Different ANNs are tested by varying input parameters, network size and complexity and division ...
    • Estimation of fuel consumption using discrete-event simulation - a validation study 

      Sandvik, Endre; Asbjørnslett, Bjørn Egil; Steen, Sverre; Johnsen, Trond Andreas Vikan (Chapter, 2018)
      In this paper, we investigate the validity of quasi-static discrete-event simulation for estimation of fuel consumption and assessment of energy effective ship designs. Stricter emission regulations for ships and developments ...
    • Estimation of Speed Loss due to Current, Wind and Waves - A Data-Driven Approach 

      Gjølme, Jens Christoffer (Master thesis, 2017)
      There is an increasing demand from customers, governments and maritime authorities when it comesto emission control and energy efficiency in the maritime industry. Demands in efficiency requires amore ...
    • Evaluation of Seakeeping Capabilities of a Floating Solar Plant 

      Aas-Hansen, Trine (Master thesis, 2018)
      The Norwegian company Ocean Sun has proposed a concept of a floating solar plant as an alternative to conventional land-based installations. This thesis reports the results from a model test on the suggested concept, based ...
    • Experimental analysis on the risk of vortex ventilation and the free surface ventilation of marine propellers 

      Kozlowska, Anna Maria; Steen, Sverre (Journal article; Peer reviewed, 2017)
      The paper presents a discussion of the ventilation inception and air drawing prediction of ships propellers, aiming to predict under what conditions ventilation will happen, and the actual physical mechanism of the ...
    • Experimental and Theoretical Investigations on the Ship Resistance in Level Ice 

      Myland, Daniela (Doctoral theses at NTNU;2019:198, Doctoral thesis, 2019)
      The growing interest in Arctic transportation and field logistics leads to an increasing demand for ships with good ice breaking performance. The ice breaking performance of ships is usually defined by their ability to ...
    • Experimental measurements of propulsive factors in following and head waves 

      Saettone, Simone; Taskar, Bhushan; Steen, Sverre; Andersen, Poul (Peer reviewed; Journal article, 2021)
      The results from resistance measurements in calm water and load-varying self-propulsion tests in calm water and regular head and following waves are presented. The experimental campaign is conducted in the large towing ...
    • Fatigue Loads on Large Diameter Monopile Foundations of Offshore Wind Turbines 

      Trøen, Tine Louise (Master thesis, 2014)
      The objective of this master thesis is to investigate the fatigue loading on an offshore wind turbine located in a waterdepth of 45 m. Offshore wind turbines are especially prone to fatigue due to variable environmental ...
    • Feasibility study of a system for damping ship pitch motions and extraction of wave energy 

      Hansen, Asbjørn Skjevdal (Master thesis, 2011)
      A system for pitch motion reduction of offshore vessels is investigated for feasibility. An air chamber is simulated in the bow section of a case ship open to water in the bottom and with a small opening in the top where ...
    • Feasibility Study of the ECO Trawl Concept 

      Liland, Vegard Arnetveit (Master thesis, 2018)
      The objective of thesis is a preliminary feasibility study of the ECO Trawl Concept, proposed by ECO Trawl AS. The concept aims at replacing the traditional trawl door solution commonly used in trawling, and instead use ...