Blar i Institutt for marin teknikk på tittel
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PM emissions and NOx-reduction due to water in fuel emulsions in marine diesel engines
(Master thesis, 2010)The goal of this M.Sc. thesis has been to study the NOx-reduction measure: water in fuel emulsion. There has been done a literature study to look into the function, system components and effect upon NOx reduction, specific ... -
Post Behaviour of Anchors Hooked by Pipelines
(Master thesis, 2021)De siste tiårene har utviklingen av undersjøiske installasjoner økt i sammenheng med reduksjon i kostnaden for etablering av dem. I samme tidsrom, og for fremtiden, vil det være en økning av seilaser i Nordsjøen grunnet ... -
Post‐installation adaptation of offshore wind turbine controls
(Journal article; Peer reviewed, 2020)The cost of offshore wind energy can be reduced by incorporating control strategies to reduce the support structures' load effects into the structural design process. While effective in reducing the cost of support structures, ... -
Potential energy savings of air lubrication technology on merchant ships
(Peer reviewed; Journal article, 2023)As the reduction of greenhouse gas emissions has become an important issue, measures and devices to reduce energy consumption are in increasing demand. In this study, the potential energy saving due to the application of ... -
A Potential Flow Method Combining Immersed Boundaries and Overlapping Grids: Formulation, Validation and Verification
(Peer reviewed; Journal article, 2021)A fully nonlinear two-dimensional numerical method based on potential-flow theory for water waves and their interaction with surface-piercing rigid bodies is presented. The harmonic polynomial cell (HPC) method is used to ... -
Potential for codends with shortened lastridge ropes to replace mandated selection devices in demersal trawl fisheries
(Peer reviewed; Journal article, 2021)In many trawl fisheries, codend size selectivity is supplemented by adding selection devices to the gear. In the Barents Sea gadoid fishery, combining diamond mesh codends with sorting grids is compulsory. However, the use ... -
Potential power setups, fuels and hull designs capable of satisfying future EEDI requirements
(Journal article; Peer reviewed, 2018)Maritime emission regulations set limits for SOx and NOx emissions for health and environmental reasons, and for CO2, through the Energy Efficiency Design Index (EEDI), with the general aim of mitigating global warming. ... -
Potential-Flow Predictions of a Semi-Displacement Vessel Including Applications to Calm-Water Broaching
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:155, Doctoral thesis, 2013)As a marine vehicle’s operational speed increases, hydrodynamic pressure plays an increasingly significant role in carrying the vessel’s weight. The shift of importance from hydrostatic to hydrodynamic pressure may cause ... -
Power Absorption of A Two-Body Heaving Wave Energy Converter Considering Different Control and Power Take-off Systems
(Peer reviewed; Journal article, 2022)This study proposed a wave power system with two coaxial floating cylinders of different diameters and drafts. Wavebob’s conceptual design has been adopted in the wave power system. In this study, a basic analysis of the ... -
Power performance and dynamic responses of a combined floating vertical axis wind turbine and wave energy converter concept
(Journal article; Peer reviewed, 2019)Currently, the development of floating wind turbines and wave energy converters (WECs) is both facing the challenge of high cost-of-energy (CoE). A promising way to reduce the CoE is to employ combined wind and wave energy ... -
Power Performance of the Wave Energy Converter in a Combined Wind and Wave Concept and its Survivability
(Chapter, 2015)The spar torus combination (STC) concept consists of a spar floating wind turbine and a torusshaped heaving-body wave energy converter (WEC). The torus can move along the spar cylinder to absorb wave energy. The 5 MW NREL ... -
Power Plant Design Optimization at the Ship Preliminary Design Phase: 'Digital Twin to Design'
(Master thesis, 2021)Her presenteres en algoritme for å optimalisere skipskraftverk i startfasen av skipsdesignprossessen. Oppgaven etablerer strukturen for hvordan en skal avgjøre størrelsen på kraftverket om bord og identifiserer hvilke ... -
Power train degradation modelling for multi-objective active power control of wind farms
(Journal article; Peer reviewed, 2023)With the coming installation of hundreds of GW of offshore wind power, penetration of the inherent power fluctuations into the electricity grid will become significant. Therefore, the use of wind farms as power reserve ... -
Prandtl steady rotary current in an upright cylindrical container
(Journal article; Peer reviewed, 2018)The quantifying of the experimentally-known (Prandtl, 1949) steady rotary current during the swirl-type sloshing is first given. The current is treated as the sum of the mean wave (pseudo-) momentum through the meridional ... -
Predicting rig motions on a MODU using operational data and machine learning
(Master thesis, 2019)Olje og Gass selskaper har investert store summer i infrastruktur til å samle, lagre og henteut data, noe som har ført til at enorme mengder med data blir generert og lagret hver dag.Denne dataen, i kombinasjon med utviklingen ... -
Predicting scour around offshore wind turbines using soft computing techniques - Comparing Genetic Programming with Existing Scour Prediction Methods.
(Master thesis, 2015)In this report a prediction method is developed for scour around monopiles. A soft computing technique called genetic programming (GP) is used to create a scour prediction formula that can compute scour in all offshore ... -
Predicting ship speeds in the Arctic using deep learning on historical AIS data
(Chapter, 2020)This study offers a perspective of applying fully connected neural networks (NN) to predict vessels’ speeds on a part of the Northern Sea Route and discusses its challenges. A fully connected neural network model was used ... -
Predicting Ship Turnaround Times with Machine Learning
(Master thesis, 2020)Målet med denne oppgaven er å undersøke hvorvidt maskinlæring ved hjelp av AIS, skips- og seilasdata kan brukes til å predikere hvor lang tid et skip vil bruke i havn. Undersøkelsen er gjort fra et havneperspektiv som betyr ... -
Predicting the Heading Misalignment of a Vessel-Shaped Offshore Fish Farm Under Waves and Currents
(Chapter, 2018)A vessel-shaped fish farm concept for open sea applications has been proposed recently. The whole system consists of a vessel-shaped floater, fish cages positioned longitudinally along the floater, and a single-point mooring ... -
Predicting thrust loss of ship propellers due to ventilation and out-of-water effect
(Journal article; Peer reviewed, 2017)This paper presents a propeller ventilation model that is tuned on experiments performed in open water condition in a towing tank. The main purpose of performing the experiments was to obtain more data at higher advance ...