Heidari, Shayan

Floating offshore wind power is a relatively new technology that enables wind turbines to float above the sea level, tied by anchors at the seabed. The purpose of this work is to develop an economic model for the technology in order to calculate the total cost of a planned wind farm. Cost data are retrieved from reports and academic journals available online. Based on these data, a model in Microsoft Excel is developed which calculates the Levelized cost of energy (LCOE) for floating wind power ...

Nouri, Hamid Reza

The emphasis of this dissertation is on using numerical and plasticity based methods to study two main areas of offshore geotechnics. The first part of this dissertation focuses on the undrained behavior of deeply embedded anchor plates under combined shear and torsion. Plate anchors are increasingly being used instead of typical foundation systems to anchor offshore floating platforms to sustain uplift operating forces. However extreme loading cases would create general loading conditions invo...

Sletten, Alexander Svae

With the increasing focus on the greenhouse effect and the introduction of taxation on NOX and CO2 emissions there has been an increased interest in reducing the emissions from the offshore oil and gas installations to bring down the operating costs. This makes the possible use of combined cycles as a source for power production offshore of great immediate interest. Compared to the simple cycle gas turbines typically used offshore today, combined cycles offer a significantly improved thermal eff...

Krueger, Andrew D.

Thesis (Ph.D.)--University of Delaware, 2007. / Principal faculty advisor: Jeremy M. Firestone, School of Marine and Earth Studies. Includes bibliographical references.

Narayanan, Sowmya Sriram. Swaminathan, Jayashankar M. Balasubramanian, Sridhar.

Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2007. / Title from electronic title page (viewed Mar. 27, 2008). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Kenan-Flagler Business School." Discipline: Business Administration; Department/School: Business School, Kenan-Flagler.

Weinert, Stephan.

Zugl.: Wuppertal, University, Diss., 2007.

Rehm, Stefan K.

University, Diss., 2003--Kiel.

Chen, Ta-Yuan.

Thesis (Ph.D.)--Murdoch University, 2007. / Thesis submitted to the Division of Arts. Bibliography: leaves 342-357.

Jonkman, Jason Mark.

Thesis (Ph.D.)--University of Colorado at Boulder, 2007. / Source: Dissertation Abstracts International, Volume: 68-11, Section: B, page: 7463. Adviser: Mark J. Balas.

Srisupattarawanit, Tarin.

Techn. Univ., Diss.--Braunschweig, 2007. / Auch als elektronisches Dokument.

Durand, Thomas J. P.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1980. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 400-405).

Welkie, Carol J.,

Thesis (M.S.)--University of Wisconsin--Madison. / Typescript. Includes glossary. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 86-88).

Wilson, Elizabeth B.

Thesis (M.S.)--University of Wyoming, 2008. / Title from PDF title page (viewed on Mar. 25, 2010). Includes bibliographical references.

Merz, Karl O.

A family of stall-regulated wind turbine blades was designed, with a rotor diameter from 44 m to 154 m, and rated power from 1.2 MW to 22.6 MW. These blades were optimized for installation atop a deepwater oating platform, using a simpli ed cost model. The optimization used a numerically-smooth airfoil model and a linear dynamic stall method, with structural dynamic analysis performed in the frequency domain. The analysis methods were validated by comparison against airfoil data, nonlinear calcu...

Bergfjord, Line

In this thesis a method was developed to evaluate and compare various offshore grid topology and capacity choices. A small power system was created for the purpose of the study, including prototypes of offshore grids. To perform the offshore grid study, preliminary steps had to be taken and four subtasks were thus defined:1. Develop a scenario of wind park sizes and locations.2. Obtain representative wind speed data for each of the locations defined.3. Calculate resulting wind power production, ...

Hanssen, Mari Røed

When a wind park is sited offshore, compact, lightweight and reliable components are important requirements. In this Master's thesis a wind energy conversion system has been proposed, where the objective is to meet the requirements of an offshore environment. The system consists of a permanent magnet generator, a reduced matrix converter, a high frequency transformer and a full-bridge converter. It is the reduced matrix converter which is the main focus of the thesis. The reduced matrix converte...

Manas Watanasak

Typescript (Photocopy) / Includes bibliographical references (leaves [181]-206) / vi, 207, [16] leaves, 16 p. of plates : ill., maps ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Geology and Geophysics, 1989

Matson, Adrian Luther

Graduation date: 1964

Aguilar Tunon, Nicolas A.

Two beaches with significant differences in grain size and thus in beach profile morphology and response to wave conditions were studied on the Oregon coast. Gleneden Beach, just south of Siletz Spit and Lincoln City, has a median grain size of 0.36 mm (medium sand) and a steep beach face slope, while Devil's Punchbowl Beach has a median grain size of 0.23 mm (fine sand) and low concave-up beach face slope. Eleven beach profile surveys were obtained at Gleneden Beach and twelve at Devil's Punchb...

McNeill, Lisa C.

The Cascadia subduction zone has been characterized as a typical Chilean-type subduction zone based on qualitative comparisons of plate age and convergence rate, with simple forearc structure. However, the discovery of unusual structural styles of deformation, variations in the morphology of the forearc, and its absence of seismic activity suggest differences from the Chilean analog. The manuscripts presented here (McNeill et al., 1997, in press, submitted) illustrate this complexity and provide...

Gjelstenli, Oddvar

Offshore crane operation is a complex task that demands the operator to control the position of the load, predict vessel motion and compensate for load sway, all at the same time. In this thesis an anti-sway, boom tip positioning and a wave following system is presented which purpose is to facilitate not automate the crane operation. Introducing such systems the operator has an extra set of tools to reduce risk of cargo damage and personnel injuries during operation. This is done by suppressing ...

Kroondijk, Rinke

As the worlds demand for energy is increasing mostly due to the increase in population, and coal, oil and gas deposits are limited, it is desirable to gather energy from renewable energy sources. Wind energy is a form of renewable energy. Wind turbines have been common on land and near shores for some time, but now one wants to take advantage of the wind resources further away from the coast. As the length from the coast increases, so does the water depth making it necessary to use other foundat...

Wika, Sandra Finsås

AISI 316/316L has traditionally been used in offshore topside environments when operating under low temperatures. It has been observed that the AISI 316/316L piping suffer from severe attacks of pitting and crevice corrosion on external surfaces. It is therefore important to emphasise the comments within the statements that give the limitations on the use of the material. While temperature is the main parameter in the standards, there seem to be others, such as location, presence of tags and coa...

Nes, Rasmus Nikolai

There is a growing demand for increased electricity transfer capacities between the countries surrounding the North Sea. The increased capacities will enable easier integration of intermittent renewable energy sources, decrease the need for balancing power, increase power trade and competition, and increase security of supply across the region. Interregional offshore grid connections are required if large scale deployment of deep sea, far from shore offshore wind energy in the North Sea is to ta...

Amundsen, Morten

This thesis attempts to study the dynamic response of offshore concrete structures by sequentially introducing physical phenomena which are related to those types of analyses. This is done by modelling a simplified part of a typical offshore concrete structure, with the purpose of establishing a reference case, on which more advanced analyses can be based, as well as evaluate simplified approaches that serve to shorten the analysis time.To establish characteristic earthquakes for the selected re...

Engebretsen, Espen André

In this thesis, the effects on regular waves when propagating from deep to shallow water have been investigated, assuming linear wave theory. The effects of shoaling, refraction, reflection and diffraction have been studied. The process and types of breaking waves has also been reviewed.Linear wave theory, second and higher order Stokes theory, Stream function theory, Solitary wave theory and Cnoidal theory have been reviewed. The relative validity of the different wave theories was also assesse...

Asklund, Martin

Denna uppsats avser redogöra för Japanska företags offshore outsourcing trender. Först presenteras för läsaren en grundläggande genomgång av lean production följt av andra begrepp som är viktiga för att kunna förstå japansk outsourcing, såsom keiretsu, kaizen och risk reduction (riskminimering), men även hur den japanska marknaden upplever varor tillverkade i Japan jämfört med varor tillverkade i andra länder. Dessa begrepp är viktiga när japanska företag fattar beslut rörande produktion och påv...

Castel, Romain

No description available.

Ghanbari, Ahmad, Oyelakin, Muhydeen

Management system for enhancing transfer of knowledge in wind power industry has not received sufficient research attention in recent times. In some cases, the wind power plant owner does not control the management system for operation and maintenance activities. Most of these wind power plants are under contract and rely upon the turbine vendor to perform most of the maintenance works and subsequently share their experience at the initial stage of operation. This research investigates the manag...

Tveten, Åsa Grytli

In this study a Multi Regional Input Output model has been developed for the base year 2000, and thereafter extended and hybridized to enable a study of offshore wind power generation in Scandinavia. Foremost the per-unit environmental impact of offshore wind power generation was calculated to an average of 16.5 grams of CO2-eq. per kWh. The MRIO model offers a broad system boundary, covering a complete set of background flows and enables in this way a thorough study of the inter-regional value ...

Schulz, Christian, Volianska, Oleksandra

Background: Development of technologies and worldwide reductions of trade barriers during the last decades increased competition and the need to offer high-quality prod-ucts and services for a reasonable price. Particularly, the service sector increased in size and variety of outputs. The development of the information technology segment has de-termined the market environment. To be able to compete in this global market offshore outsourcing of IT functions can be a valuable tool if handled in th...

Årdal, Atle Rygg

This thesis is centered around the possibilities of integrating offshore wind power together with oil and gas platforms. The motivation behind this topic is to reduce the emissions of CO2 and other pollutive gases from conventional offshore power plants. The electrical systems on oil platforms are weaker than an onshore grid, so measures should be taken to let the wind power integration contribute to a more stable operation on the platform. To explore existing and future technologies that can ac...

Eckhardt, Øyvind

A literature survey of LNG processes suitable for offshore environment has been evaluated. Thesurvey has been performed with emphasis on space requirements, complexity, efficiency and safety.Thermodynamics theory is described and used in the investigation of the NicheLNG process. Theliquefaction part of the HLNG FPSO-1 has been evaluated with respect to its energy consumption,improvements and the possibility to expand the process to give an indication about improvementpotentials. In addition, on...

Giannoccaro, Dimitris

The aim of this study is to define the minimum size of Statcom supporting the interconnection of a large offshore wind farm with high voltage direct current line commutated converters (HVDC LCC) and high voltage direct current voltage source converter (HVDC VSC) connected to a power system. The size of the Statcom is defined by using a simulation model consisting of a wind farm, HVDC LCC based transmission system, HVDC VSC based transmission system, a Statcom and the Cigr� Nordic 32 power system...

Mitchell, S.

The International Civil Aviation Organisation maintains that future viability of air transportation may well be predicated on perception of safety rather than any more tangible measures. In order to keep safety risks at an acceptable level it advocates a change of fundamental approach to the system of safety management, one that is more proactive. This study examines the causes of such a requirement for change, and the scope for improving the efficiency of what Calabresi refers to as the second ...

Aljeeran, Fares

This research study developed basic dynamic models that can be used to accurately predict the response behavior of a near-shore wind turbine structure with monopile, suction caisson, or gravity-based foundation systems. The marine soil conditions were modeled using apparent fixity level, Randolph elastic continuum, and modified cone models. The offshore wind turbine structures were developed using a finite element formulation. A two-bladed 3.0 megawatt (MW) and a three-bladed 1.5 MW capacity win...

Alqahtani, Mari H.

I present a systematic method to primary develop existing black oil fields. This method uses integrated reservoir development workflow (IRDW) that relies on integrated asset model (IAM). Developing any existing field means providing a plan that generally serves the development goal(s) specified by management. However, serving the development goal(s) by itself does not guarantee an optimal development plan. Plans that do not rely on an IAM are less accurate. Some plans do not include economics in...

Lui, Tin-pak., 雷天柏.

published_or_final_version / Architecture / Master / Master of Architecture

Lennon, Gary R.

No description available.

Balk, David M.

No description available.

Backes, Douglas Allen, Leipper, Dale Frederick

No description available.

Williamson, John David.

No description available.

Gillis, Arthur Watson

No description available.

De Alwis, Pahansen

Vibration is a part of human life. People use vibrations in many useful ways but eventually human exposure to vibration has become an impediment to human life. Health problems due to exposure to vibration and shock are common among the crew operating high speed craft (HSC). Whole body vibration and repeated shocks have been identified as one of the major causes for health effects among HSC crew. Whole body vibration can affect health, comfort and performance depending on the magnitude, waveform ...

Morgunova, Maria

Energy issues have always been on the global economics and geopolitics agenda, even though energy sources have been changing over time. In recent years, the awareness of Arctic offshore oil and natural gas development has escalated, yielding economic opportunities and incurring risks. The offshore Arctic is one of ‘edges’ of the global petroleum industry. The importance of these oil and natural gas resources extends beyond regional and national boarders and local economies, as these activities h...

Hall, Matthew Thomas Jair

Floating offshore wind turbines have the potential to become a significant source of affordable renewable energy. However, their strong interactions with both wind- and wave-induced forces raise a number of technical challenges in both modelling and design. This thesis takes aim at some of those challenges. One of the most uncertain modelling areas is the mooring line dynamics, for which quasi-static models that neglect hydrodynamic forces and mooring line inertia are commonly used. The con...

Stoian, Iulia

This thesis work is directed at estimating gas hydrate and free gas distribution and saturation in local structures in the Ulleung Basin, East Sea offshore Korea. The estimates are obtained from a 2-D multi-channel seismic (MCS) reflection profile from the basin. Firstly, structures of locally focused upwelling fluid and gas flow were imaged using time-migrated sections and seismic attributes, and secondly seismic velocities were obtained to estimate gas hydrate and free gas saturations. The st...

Chen, Jiun-Yih

Jacket platforms are fixed base offshore structures used to produce oil and gas in relatively shallow waters worldwide. Their pile foundation systems seemed to perform better than what they were designed for during severe hurricanes. This observation has led to a common belief in the offshore oil and gas industry that foundation design is overly conservative. The objective of this research is to provide information to help improve the state of practice in designing and assessing jacket pile foun...

Sultania, Abhinav

While wind energy has witnessed faster growth than any other renewable energy source in recent years, two issues—the decreasing availability of large land expanses for new wind farms and transmission difficulties arising from siting wind farms in remote regions far from load centers—have slowed down this growth considerably. Siting wind turbines offshore places the generating capacity closer to population and load centers; thus, reducing grid congestion. Also, at offshore sites, one can expect ...

Onwuka, Amanda Chiderah

This thesis presents an econometric methodology for analyzing the impact of market concentration (HHI) on the day rate prices paid by E&P operators for the lease of drilling rigs. It is an extension of the work of Lee (2008), ‘Measuring the Impact of Concentration in the Drilling Rig Market’. Specifically, the work entailed using a more detailed time series data than was initially used (quarterly), analyzing impact of concentration on day rate prices by water depth specification of drilling rigs...