Gressetvold, Marit

The approach is based on four criterias; 1) elasticity of adult and juvenile survival on population growth rate, 2) redlist status and 3) local abundances and 4) flight properties. I also investigated whether the different criteria differed based on geographic maps of the vulnerability in coastal areas in Norway, and the method presented in this study was compared to another framework for vulnerability assessment, developed by Garthe and Hüppop (2004). The present study contributes to a ref...

Green, Michael Allan

The complexity and pace of technology, combined with the strategic importance of technology, has created a dilemma for most organisations. The requirement is to be able to take advantage• of the latest technology and state-of-the-art practices. So, instead of trying to be experts in both their core business and technology, executives focus their attention on the core business and rely on others to provide the technology expertise. Healthy and profitable Japanese companies are beginning to view o...

Ahmad, Haseeb

This thesis investigates the comparison between two different alternating current topologies of an offshore wind farms connection to an offshore high voltage direct current (HVDC) converter platform. The offshore high voltage direct current converter platform converts alternating current into direct current. Two different topologies will be investigated. In the first topology, the offshore wind farms are connected to an HVDC converter platform through offshore AC collector platform. An offshore ...

Trevino Cantu, Hector

Operations and maintenance (O&M) activities represent a significant share of the expenses during the lifetime of offshore wind farms. When compared to onshore wind farms, O&M costs are increased for the offshore case, as specialized vessels, weather windows and rough conditions mean more failures, downtime (decreasing availability), spare parts, and man-hours.This study comprises an analysis of the available O&M data from a selected offshore wind farm. The results and conclusions fro...

Manouchehrabadi, Maryam Kharaji

Wind power, as a source of renewable energy, is growing very fast. Especially so, is consideration given to offshore wind farms where expansion is due in part to limited social and visual impact, reduced noise effect of turbines, and at the same time higher production of offshore wind turbines. Maintenance is always a considerable and costly part of the wind power investment, especially for offshore projects, but it could not improve as fast as the increasing wind industry in the world. The oper...

Dunlap, Dallas Brogdon

The lower continental slope of Morocco’s west coast consists of Triassic-age salt manifested in the form of diapirs, tongues, sheets, and canopies, and both extensional and compressional structures that result from salt movements. Salt diapirism and regional tectonics greatly influenced a broad spectrum of depositional processes along the margin. Mapping of a 1064-km2 (411-mi2) seismic survey acquired in the Safi Haute Mer area reveals that Jurassic to Holocene salt mobilization has induced sedi...

Solomon, Evan A., Spivack, Arthur J., Kastner, Miriam, Torres, Marta, Borole, D.V., Robertson, Gretchen, Das, Hamendra C.

Natural gas hydrates occur on most continental margins in organic-rich sediments at water depths >450 m (in polar regions >150 m). Gas hydrate distribution and abundance, however, varies significantly from margin to margin and with tectonic environment. The National Gas Hydrate Program (NGHP) Expedition 01 cored 10 sites in the Krishna-Godawari (K-G) basin, located on the southeastern passive margin of India. The drilling at the K-G basin was comprehensive, providing an ideal location to ad...

Winters, W.J., Waite, W.F., Mason, D.H., Kumar, P.

As part of an international cooperative research program, the U.S. Geological Survey (USGS) and researchers from the National Gas Hydrate Program (NGHP) of India are studying the physical properties of sediment recovered during the NGHP-01 cruise conducted offshore India during 2006. Here we report on index property, acoustic velocity, and triaxial shear test results for samples recovered from the Krishna-Godavari Basin. In addition, we discuss the effects of sample storage temperature, han...

Krylov, Alexey, Logvina, Elizaveta, Hachikubo, Akihiro, Minami, Hirotsugu, Nunokawa, Yutaka, Shoji, Hitoshi, Mazurenko, Leonid, Matveeva, Tatyana, Obzhirov, Anatoly, Jin, Young Keun

Mineralogical and isotopic analysis of authigenic carbonates from different gas hydrate-bearing seepage structures in the Derugin Basin (Sea of Okhotsk) are presented. The analysis showed the existence of four morphological types of carbonates, with all of them mainly of Mg-calcite.13C values of carbonates generally light owing to the inheritance of carbon from microbial methane. 13C-enriched samples at the VNIIOkeangeologia structure with 13C values of up to +9.3‰ represent carbonate preci...

Stoian, Iulia, Park, Keun-Pil, Yoo, Dong-Geun, Haacke, R. Ross, Hyndman, Roy D., Riedel, Michael, Spence, George D.

It has recently been recognized that abundant gas hydrates occur in localized zones of upwelling fluids, with concentrations much higher than in regional distributions associated with bottomsimulating reflectors (BSRs). We report a study of multi-channel seismic reflection data across such structures in the Ulleung Basin, East Sea backarc offshore Korea, an area with few BSRs. The structures are commonly up to several km across and a few hundred meters in depth extent, and are characterized...

Itoh, Yoshito, Kitane, Yasuo, Chen, Xiao

No description available.

Berggren, Joakim

Until today the offshore wind power has grown in a steady pace and many new wind farms are being constructed around the globe. An important factor that is investigated today in the industry are the security of power supply to the equipment needed for controlling the offshore system during emergency situations. When a offshore wind farm is disconnected from the external grid and an emergency case occur the wind turbine generators lose their ability to transfer power and they are forced to be take...

Birkeland, Christine

An integrated approach to climate and energy policy is required to meet the challenges associated with climate changes caused by anthropogenic emissions. At the same time, the demand for electricity is increasing. Wind power is considered as part of the solution in solving these challenges, as this is renewable energy. By relocating wind power production offshore, stronger winds are achieved that increases electricity production without having emissions of GHG during power production. Europe's a...

Gundegjerde, Christian, Halvorsen, Ina Blomseth

In recent years the global installed capacity of offshore wind has increased rapidly, due to the world’s green electricity demand. Increasing developments in the offshore wind sector has led to fewer possible locations for new wind farms, forcing the developers to move further and further away from shore. This shift from near-shore to far-shore wind farm locations, increases the complexity and costs of executing operations and maintenance, which can account for 25% of the production cost of powe...

Wang, Liaoyi

RAM analysis is used to assess system availability in the oil and gas industry. As the concept design for reliability is getting attention throughout various industries, RAM analysis has become a mandatory delivery in the conceptual design phase. LCC analysis aims at predicting acquisition cost and ownership cost during the project life cycle. Since the ownership cost is derived from operation and maintenance, which can be potentially much higher than the acquisition cost, so that quantifying th...

Furunes, Eirik Wie

Offshore wind turbines have an enormous potential in terms of larger average wind speeds and low surface roughness compared to their onshore counterpart. Shallow water fixed wind turbines are ranked as a mature technology but are also limited by the price tag of creating and installing fixed installations for increasing depths. Hywind, which is a floating wind turbine concept developed by Statoil with focus on larger depths but may prove beneficial for shallower depths and fill the present void ...

Torgauten, Arve Olaf Alvik

This masters thesis is written on the topic of barrier management, and specifically the human and organizational aspects in this field. The main objective of the thesis is to clarify the use of terms related to human and organizational aspects of barrier management. The thesis is re- stricted to major accident risks in the offshore oil and gas industry.There have in the later years been an increasing focus on the operational and organizational aspects of risk reduction. In addition to this focus...

Ohlson, John

Abstract   The permit application process for offshore wind farms (OWF) in Sweden conceivably requires a comprehensive and transparent complement within risk management. The NETEP framework (covering risks concerning navigation, economics, technology, environment and politics), based on a futures planning mechanism (STEEP) has consequently been brought forward as a structure for the application of FMECA (Failure Mode, Effects, and Criticality Analysis) methodology to the permit application proc...

Houmstuen, Jørgen

This thesis introduces and analyses the following condition monitoring methods for a first stage production separator: - Neutron backscatter - Acoustic monitoring (active/passive/ultrasonic) - Gamma monitoring - Microwave monitoring - IR thermometry The methods are analyzed and evaluated in a cost-benefit analysis. Different models for cost estimation are presented along with estimations of the benefits. To perform the cost-benefit analysis a model has been developed and implemented in a spreads...

Andersson, Dan, Bernhardsson, Martin

In the global business environment, outsourcing and offshore outsourcing are strategies forfirms to handle the increasing competition in their specific market segments by utilizing thecapabilities of other firms in order to gain competitive advantages. China has become animportant player on the global market and is an attractive country for Western firms’offshore outsourcing initiatives. Even though outsourcing and offshore outsourcing havebeen discussed in the literature for a long period of ti...

Koo, Bon-Jun

A computer program is developed for the dynamic analysis of a spar platform coupled with mooring lines and risers in waves, winds, and currents. The new multi-contact analysis program is developed for the nonlinear multi-contact coupling between vertical risers and guide frames inside of the spar moon-pool. The program extends capability of the current coupled dynamic analysis program, WINPOST, by adding the capability of analyzing riser effects caused by the contact forces and moments from buoy...

Artagan, Salih Serkan

A numerical model based on one-line theory is developed to evaluate the wind wave driven longshore sediment transport rate and shoreline change. Model performs wave transformation from deep water through the surf zone and computes the breaking parameters. The formula of longshore sediment transport rate used in the numerical model is selected as a result of comparative studies with the similar expressions and the field measurements. Offshore breakwater module of the numerical model is developed ...

LE THI HUYNH ANH, LE THI HUYNH ANH

碩士 / 國立臺灣科技大學 / 工業管理系 / 107 / Employing an optimal maintenance policy for an offshore wind power system is very important to decrease budgets or costs while increasing reliability. Moreover, a maintenance threshold is useful at determining such a policy when obtaining the lowest possible maintenance cost. Given the limited works on the topic, this paper proposes a two-step approach to determine the optimal maintenance threshold for multiple components of an offshore wind power system to minimize...

Santos, Nicolau Oyhenard dos

The price of crude oil is a major concern for oil companies nowadays, maintaining costs in deepwater drilling activities is of utmost importance. The contribution of the heave movement from oating platforms to the vibrations of drillstrings is still a subject not fully appreciated in the literature. This work deals with the dynamic behavior of the drillstring through nite element analysis (FEA) when an oscillating axial displacement at the top is applied. Numerous drillstring models were genera...

ISMAEL HUMBERTO FERREIRA DOS SANTOS

PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO / Os sistemas de produção de petróleo em águas profundas, incluindo as unidades flutuantes de produção (plataformas ou navios) e todos os equipamentos que participam da produção são atualmente projetados por complexos sistemas de modelagem computacional. Tais sistemas envolvem as áreas de cálculo estrutural, meteo-oceanografia (forças de correntes, ondas e ventos), hidrodinâmica, risers (tubos de aço rígidos ou flexíveis para levar o óleo do poç...

BERNARDO FRANKENFELD VILLELA PEDRAS

PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO / COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR / CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO / PROGRAMA DE EXCELENCIA ACADEMICA / Aplicações de visualização de Engenharia Offshore são, na maioria dos casos, muito complexas e devem ser capazes de representar muitos dados vindos de simulações numéricas computacionalmente intensivas. Para ajudar a melhor analisar os resultados, visualização 3D pode ser usada em con...

MD.Mamunur Rashid, 雷義

碩士 / 南台科技大學 / 企業管理系 / 100 / The aim of this study was to determine and examine the offshore outsourcing procedures and factors influencing the offshore outsourcing decision regarding the manufacturing firms in a developing country like Bangladesh. The extensive literature review show that in competitive business environment, firms need to offshore outsource their manufacturing part of the business processes to other countries to gain low cost with high quality of product or product differentiati...

Augusta Adha, Augusta Adha

碩士 / 國立臺灣科技大學 / 營建工程系 / 101 / This thesis purpose is to study the procedure of optimization of jacket type offshore structure with fatigue reliability constraint. Furthermore, it also studies the applicability and effectiveness of using Genetic Algorithm as the algorithm to optimized the jacket structure under fatigue reliability constraint. The jacket platform must be economical but still reliable in its entire service life. In this thesis, the multiple variable optimization using Genetic Algor...

Zhang, Haibo

L'exploitation de l'énergie éolienne loin des côtes, bien qu'abondante, dépend du transport de puissance en Courant Continu Haute Tension (HVDC) qui nécessite une sous-station placée sur une plateforme dédiée. Cette plate-forme offshore étant volumineuse, son cout d'installation est élevé et sa mise en œuvre est compliquée. Cette thèse s'intéresse à une topologie de ferme éolienne offshore DC qui transporte son énergie vers l'onshore sans utiliser de sous-station offshore. Ce type de Ferme Eolie...

ISMAEL HUMBERTO FERREIRA DOS SANTOS

[pt] Os sistemas de produção de petróleo em águas profundas, incluindo as unidades flutuantes de produção (plataformas ou navios) e todos os equipamentos que participam da produção são atualmente projetados por complexos sistemas de modelagem computacional. Tais sistemas envolvem as áreas de cálculo estrutural, meteo-oceanografia (forças de correntes, ondas e ventos), hidrodinâmica, risers (tubos de aço rígidos ou flexíveis para levar o óleo do poço em sub-superfície até a unidade de produção), ...

Lundin, Rasmus, Beitler-Dorch, Benjamin

A comparison between a traditional fixed high voltage direct current energy transmission system and a mobile transmission system utilizing vanadium redox flow batteries has been conducted in this degree work.  The purpose of this comparison was to evaluate if a mobile energy transmission system could be competitive in terms of energy efficiency and cost-effectiveness for use in offshore wind power applications. A literary study was made to fully grasp the various technologies and to create empir...

, PraveenShivakumar, Vijapurapu, Krishna Kanth

Context. Tacit knowledge preservation (TKP) is a critical activity in outsourcing business since there is a high possibility of losing business if the personnel turnover rate is high. Objective: This study investigates TKP techniques from both knowledge management (KM) and software engineer (SE) perspectives followed by a discussion on the practicability of these techniques in software industries. The main aim of this research study is to provide a set of recommendations that assists preserving ...

Tinker, Justine

Includes bibliographical references (leaves 201-217).

BERNARDO FRANKENFELD VILLELA PEDRAS

[pt] Aplicações de visualização de Engenharia Offshore são, na maioria dos casos, muito complexas e devem ser capazes de representar muitos dados vindos de simulações numéricas computacionalmente intensivas. Para ajudar a melhor analisar os resultados, visualização 3D pode ser usada em conjunto com ambientes de Realidade Virtual (RV). A ideia principal desse trabalho começou quando reconhecemos duas demandas que aplicações de engenharia tinham ao rodar em ambientes RV. Primeiramente há uma deman...

Watan, Reny

The assessment had been conducted for shipside collision against unstiffened, inclined jacket leg segment (column). The inclined column has been modelled with horizontal-to-vertical ratio of 1/7. Two types of boundary conditions of the column has been modelled; perfectly clamped boundary conditions (clamped or fixed) and boundary conditions with axial flexibility (axial spring). For clamped column, two different impact locations have been simulated, namely middle span impact and quarter span imp...

Hadiya, Maheshkumar

The objective of this thesis work has been to investigate the electric system stability, reliability and power security of an “off-grid” isolated network system integration of an offshore wind farm to offshore oil and gas platforms via HVAC transmission, considering different network topologies for wind power penetration, network losses, application of FACTS devices and different system voltage levels. The system stability studies were performed by steady state and dynamic simulations,...

Sainabou Ndure, Sainabou Ndure

碩士 / 國立臺灣科技大學 / 營建工程系 / 106 / Offshore Wind Turbine installation schedule risk analysis is a complex task especially in Taiwan due to the fact that involves huge amount of uncertainties such as typhoons, high winds etc. which have high dependency on the project activities. As a result of this, there is insufficient data for analysis and thus leading to a delay in the successful execution of the project. This study developed the Fuzzy Bayesian Network-Monte Carlo Simulation (FBN-MCS) to model un...

Yamid Alberto Carranza Sánchez

Offshore oil platforms are used for the exploitation and production of hydrocarbons and consist of a processing plant and a utility plant. The oil and gas industry operations are energy-intensive and, in the case of offshore platforms, the need to decrease energy consumption and reduce CO2 emissions has increased. In the oil and gas industry, the ISO 50001 standard promotes the implementation of energy management systems and proposes indicators based on energy. Interestingly, after several decad...

Merkai, Christina

Offshore wind has proved to be one of the most reliable and clean energy sources over the last few years. The industry has experienced a significant growth, with an increase of 101% only in 2017 compared to 2016. This raises the importance of the need for more secure power supply systems, which can be used for controlling the offshore farms during disconnections from the main grid. Nowadays, diesel generators are being used to feed auxiliary services of the offshore wind turbines in situations o...

Krupiński, Szymon

Cette thèse vise à rendre possible l’utilisation des véhicules sous-marins autonomes (AUVs) dans l’inspection visuelle des structures offshore. Deux tâches sont identifiées: le suivi des structures rectilignes et la stabilisation devant les cibles planaires. Les AUVs complétement actionnés et équipés d'une centrale inertielle, un DVL, un altimètre et une caméra vidéo sont visés. La dynamique en 6 d.d.l. d'un AUV est rappelée. L'architecture de contrôle reflétant la structure en cascade de la dyn...

Ghalayini, Ramadan

Le bassin de Levant, localisé à l’extrémité la plus orientale de la Méditerranée, se situe à jonction de trois plaques tectoniques majeures (Afrique, Arabie, Eurasie ainsi que la microplaque Anatolienne). Il est bordé à l’Est par la faille du Levant (frontière Arabie/Afrique), qui représente un système transformant de 1000 km de long, reliant le rift dans la Mer Rouge au sud avec la zone de convergence le long du Taurus au nord (frontière Arabie/Eurasie). Son extrémité nord est marquée par la fr...

Ramberg, Henriette Flathaug

Offshore wind farming is an industry under development and involves challenges. The farms might be located close to ship trading routes. This increases the risk of ship-wind farm impact, causing economic losses, environmental pollution and human fatalities. The first part of this report describes various bottom supported wind farm technologies and presents a discussion of the risk picture considering oil spill due to this collision event. A review of relevant standards is enclosed. The main part...

Gaillard, Hugo

The work focuses on the methods used to develop one particular sub-part of a computer tool for optimizing the final cost of energy in offshore wind parks : the linking infrastructure for bringing electrical power ashore. The thesis is the outcome of a 6-month cooperation with AREVA Wind, within the Wind Plant Solutions department, and is based on previous work done by AREVA, their proprietary database, as well as on publically available technical data. Exporting power from an offshore electrical...

Yang, Xu, Yang

No description available.

Cátia Florinda da Rocha Pinheiro

No description available.

Almeida, Susana Raquel Melo de

Tese de mestrado integrado. Engenharia Química. Faculdade de Engenharia. Universidade do Porto. 2012

Bergvall, Daniel

The aim of this thesis is to evaluate different repowering alternatives from the viewpoint of increasing power production from existing offshore wind farms (OWF), as some of the first commissioned OWFs are approaching the end of their expected lifetime. The thesis presents a literature review of components and financial aspects that are of importance for repowering of OWFs. In the literature review, risks and uncertainties regarding repowering are also lifted and analysed. The thesis contains a ...

Dame, James Knox

No description available.

Orlando Barbosa Leite

No description available.

Israel Neto dos Santos Ribeiro Leão

No description available.