Browsing Institutt for marin teknikk by Issue Date
Now showing items 161-180 of 3421
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Subsurface towing of heavy module
(Master thesis, 2011)The offshore industry is expanding, new contracts are offered all over the world and new oil fields are discovered deeper and further offshore. With this expansion follows great business opportunities for existing and new ... -
Improvement of safety during crane and lifting operations offshore based on improved logistic planning
(Master thesis, 2011)This paper is written to estimate the effect improvement in the logistic planning would have on risk of offshore crane and lifting operations. The effect of logistic planning has on the safety has been modeled as a part ... -
Feasibility study of a floating system for extraction of wave energy
(Master thesis, 2011)The idea of harnessing energy from the ocean waves is a seductive one, a limitless resource. But the road from idea to success is long and has been traveled by many, the great achievements are few and far between. This ... -
Comparison study of linear and nonlinear controllers and observers for Dynamic Positioning systems
(Master thesis, 2011)A dynamically positioned ship is continuously exposed to environmental disturbances like wind, waves and current. To maintain the desired position and heading or to perform lowspeed maneuvering of a ship, by using its own ... -
Feasibility study of a system for damping ship pitch motions and extraction of wave energy
(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 ... -
Time-domain simulation of floating wind power plants in irregular seas
(Master thesis, 2011)As the limited fossil energy sources become empty, new sources for energy need to be exploited. One such renewable energy is wind energy. The wind energy potential is high offshore, and is therefore a beneficial location ... -
Design and Analysis of Safety Link for Emergency Disconnect of Completion and Work-over Marine Risers
(Master thesis, 2011)This master thesis is done in collaboration with Aker Solutions Subsea AS and proposes how one could securely cope with uncontrolled drift-off where the marine riser experience excessive moments and/or tension that will ... -
Life cycle model for economical evaluation of replacement/improved maintenance strategy for systems and equipment
(Master thesis, 2011)Systems that deteriorate over time can result in increased operational costs. Reduced efficiency, increased fuel consumption, increased failure rate that induces increased downtime costs, are some of the consequences due ... -
Fatigue of Flexible Riser in Bend Stiffner Area
(Master thesis, 2011)The development of offshore fields has reached large water depths, and hence more challenges are met in design of offshore systems. The large water depths challenge the designer in terms of high temperature and pressure ... -
Assessment of Safety against Free Drift (Loss of Position) of Semisubmersibles
(Master thesis, 2011)For the assessment of safety against free drift (loss of position) of semi-submersibles, the mooring system of a semi-submersible is introduced, and the mooring line tension is looked into based on the laboratory model ... -
Deep water ocean surface modelling with ship simulation
(Master thesis, 2011)The scope of this work is to implement a realistic looking ocean simulator with a ship floating on the surface. Foam, and ship wake is included to add to the realism. The application is designed to run on a normally equipped ... -
Hydrodynamic Coefficients for Wellhead Structures
(Master thesis, 2011)This Master of Science Thesis is written at the Norwegian University of Science and Technology (NTNU), in Trondheim, Norway. The M.Sc. Thesis is executed during the spring of 2011. This thesis is a result of a request from ... -
Condition Monitoring of Safety Critical Valves
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:72, Doctoral thesis, 2011)The oil and gas industry is constantly trying to improve the quality of its operations. The industrial collaboration project, TAIL I/O, focused on this issue by developing and demonstrating technology, methods and work ... -
Prediction of DI-CI Engine Performance and Emission Characteristics of Varying Renewable Diesel Fuels with Experimental Results from Marine Diesel fuel
(Master thesis, 2011)This paper discusses finding of combustion research carried out using Ricardo hydra research diesel engine with varying renewable fuels. The primary fuel of investigation is rapeseed methyl ester (RME) and marine diesel ... -
Design analysis and optimisation of mooring system for floating wind turbines
(Master thesis, 2011)Lately, focus is put on renewable energy resources as the environmental concerns regarding exploitation of hydrocarbons are increasing. The enormous energy potential found in offshore wind fields is proposed utilized by ... -
Evaluation of Models and Accept Criteria for Technical Condition of Ship Systems and Equipment
(Master thesis, 2011)Maintenance is today an increasing part of the shipping industry. The demand for safer operations, lower emissions and low downtime is constantly increasing. As a result of this more complicated and complex system is ... -
Logistic management of production chemicals: A simulation Study
(Master thesis, 2011)This paper evaluates the logistics for production chemicals used on the offshore installations of the coast of Norway. Statoil provided the following problem description: There are an increasing number of fields on the ... -
A Wiener-Laguerre Model of VIV Forces Given Recent Cylinder Velocities
(Journal article; Peer reviewed, 2011)Slender structures immersed in a cross flow can experience vibrations induced by vortex shedding (VIV), which cause fatigue damage and other problems. VIV models that are used in structural design today tend to assume ... -
Analyse av dynamisk sylindertrykk i dieselmotorer
(Master thesis, 2011)I det kommersielle markedet for sylindertrykkanalyse systemer er det tre produsenter som ser ut til å være dominerende, ABB, AVL/Kongsberg og Lemag. Kun AVL leverer Heat Release beregninger, resten holder seg til trykkmålinger ...