Browsing Institutt for marin teknikk by Issue Date
Now showing items 81-100 of 3421
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Assessment of engine performance and exhaust emission at changing operating conditions and under fault conditions
(Master thesis, 2010)Optimal engine performance during an engines operation lifetime is important to gain minimal costs related to fuel and maintenance cost. Downtime related to propulsion engine will also benefit from this. In this report ... -
Operational criteria for transporting wind turbine with WindFlip
(Master thesis, 2010)This master thesis explores the transportation part of the installation concept WindFlip, where fully assembled floating wind turbines are transported lying with a 5° slope on the barge WindFlip. The transportation phase ... -
Supervisory-switched Control for Dynamic Positioning Systems in Arctic Areas
(Master thesis, 2010)Dynamically positioned vessels may experience rapidly changing environmental loads if the vessels are operating in ice-covered waters. The transition between open water to level ice is an abrupt change from no ice loads ... -
Barge transportation of heavy objects
(Master thesis, 2010)The topic for this master thesis is transportation of heavy platform modules on barges. The goal is to find the short-term extreme accelerations, or design accelerations, that are limiting for the feasibility of the ... -
Control Strategies for Maneuvering in Ice Ridge and Multi Ice Regimes
(Master thesis, 2010)Operations in an arctic environment are dependent on accurate, safe and reliable Dynamic Positioning (DP) systems. Increased activities in arctic environments have lead to a demand for knowledge of different ice regimes ... -
Exhaust Gas Cleaning with Selective Catalytic Reduction (SCR)
(Master thesis, 2010)This thesis presents the work around three laboratory experiments conducted in the machinery laboratory at MARINTEK with focus on performance and degrading mechanisms of a Selective Catalytic Reduction system. Höegh LNG ... -
Life cycle assessment of Fuel Cells onboard ships
(Master thesis, 2010)This report is a comparative life cycle assessment (LCA) of a fuel cell and a gas engine. It includes emission release over a lifetime, and recommendations to which system to install in operating vessels today. IMO and ... -
Loads on the Hywind wind turbine during the "flipping-phase" with WindFlip
(Master thesis, 2010)WindFlip is a concept for transportation and installation of fully assembled floating offshore wind turbines. In this master thesis the relevant part of the operation is the flipping-phase. The flipping-phase is defined ... -
An investigation of forces and moments from drilling risers on wellheads
(Master thesis, 2010)The technology of retrieving energy in form of oil and gas offshore is in continuous development, and is moving towards larger water depths and more difficult environmental conditions. Challenges regarding the use of deep ... -
Launch and recovery of ROV: Investigation of operational limit from DNV Recommended Practices and time domain simulations in SIMO
(Master thesis, 2010)Offshore contractors seek to operate their remotely operated vehicles for the widest range of sea conditions where particularly launch and recovery through splash zone are critical phases in the offshore operation. The ... -
Numerical investigations of Piston mode resonance in a moonpool using OpenFOAM
(Master thesis, 2010)Moonpool dynamics is a complex phenomenon, and is part of a series of problems referred to as gap problems involving entrapped fluid in a small gap. The fluid in these gaps has an infinite number of resonance modes; a ... -
Hydrodynamic interaction between floating bodies
(Master thesis, 2010)This thesis is written in collaboration with WindFlip AS in order to investigate the behavior of Hywind and WindFlip after the release of Hywind from the WindFlip vessel. Potential theory has been applied, and no viscosity ... -
Estimation of Ice Resistance of Ships based on Measurements of Ice Thickness, Speed and Power
(Master thesis, 2010)The activity in the polar marine areas is increasing from offshore and shipping activities supporting both commercial and tourist operations. Particular of interest is the expansion in offshore oil and gas exploration and ... -
Hydrodynamiske beregninger vha GPU
(Master thesis, 2010)Om man skal gjøre prediksjoner av hydrodynamiske egenskaper til større marine strukturer i dag, er den vanligste måten fremdeles modellforsøk, empiri og lineærteori. Viskøse CFDsimuleringer ved hjelp av RANSmetoder har ... -
Simulation of dynamic umbilical installation effects
(Master thesis, 2010)The background for this study is a request from Technip related to the need of installing of long length umbilicals utilizing large capacity vessels designed for installation of steel pipelines. The installation vessel, ... -
Subsea Hydraulic Leakage Detection and Diagnosis
(Master thesis, 2010)The motivation for this thesis is reduction of hydraulic emissions, minimizing of process emergency shutdowns, exploitation of intervention capacity, and reduction of costs. Today, monitoring of hydraulic leakages is scarce ... -
Application of an Active Foil Propeller
(Master thesis, 2010)In this master thesis the author has investigated the potential benefits from an active foil propeller. Foils are mounted on the hull and take advantage of the heaving and pitching motion of the vessel travelling and produce ... -
Thrust loss on azimuthing thrusters due to Coanda effect
(Master thesis, 2010)The main objectives in this master's thesis is to investigate how the Coanda effect influences a thruster jet which further causes a thrust loss. The tendency of a thruster slipstream to be deflected towards a nearby ... -
Numerical and experimental study of forced heave of two-dimensional section in ice
(Master thesis, 2010)A two-dimensional study of a ship section forced to heave in open water and surrounded by plates representing ice have been performed. The setting is a ship moored in ice infested waters. The ice is modeled as a stiff rigid ... -
Choke condition and performance monitoring
(Master thesis, 2010)Sand production is a common complex problem in the oil and gas industry, and choke valves is typically suffering for this in form of erosive damage. The degree of erosive damage is decided by many different factors where ...