Advanced reliability analysis of complex offshore Energy systems subject to condition based maintenance.

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dc.contributor.advisorSimms, Nigel J.
dc.contributor.advisorShafiee, Mahmood
dc.contributor.authorElusakin, Tobiloba
dc.date.accessioned2024-03-14T11:03:21Z
dc.date.available2024-03-14T11:03:21Z
dc.date.issued2021-04
dc.description.abstractAs the demand for energy in our world today continues to increase and conventional reserves become less available, energy companies find themselves moving further offshore and into more remote locations for the promise of higher recoverable reserves. This has been accompanied by increased technical, safety and economic risks as the unpredictable and dynamic conditions provide a challenge for the reliable and safe operation of both oil and gas (O&G) and offshore wind energy assets. Condition-based maintenance (CBM) is growing in popularity and application in offshore energy production, and its integration into the reliability analysis process allows for more accurate representation of system performance. Advanced reliability analysis while taking condition-based maintenance (CBM) into account can be employed by researchers and practitioners to develop a better understanding of complex system behaviour in order to improve reliability allocation as well as operation and maintenance (O&M). The aim of this study is therefore to develop models for reliability analysis which take into account dynamic offshore conditions as well as condition-based maintenance (CBM) for improved reliability and O&M. To achieve this aim, models based on the stochastic petri net (SPN) and dynamic Bayesian network (DBN) techniques are developed to analyse the reliability and optimise the O&M of complex offshore energy assets. These models are built to take into account the non-binary nature, maintenance regime and repairability of most offshore energy systems. The models are then tested using benchmark case studies such as a subsea blowout preventer, a floating offshore wind turbine (FOWT), an offshore wind turbine (OWT) gearbox and an OWT monopile. Results from these analyses reveal that the incorporation of degradation and CBM can indeed be done and significantly influence the reliability analysis and O&M planning of offshore energy assets.en_UK
dc.description.coursenamePhD in Energy and Poweren_UK
dc.description.notesShafiee, Mahmood (Associate)
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/20986
dc.language.isoenen_UK
dc.publisherCranfield Universityen_UK
dc.publisher.departmentSWEEen_UK
dc.rights© Cranfield University, 2021. All rights reserved. No part of this publication may be reproduced without the written permission of the copyright holder.en_UK
dc.subjectReliabilityen_UK
dc.subjectoperation and maintenanceen_UK
dc.subjectcondition monitoringen_UK
dc.subjectBayesian networks (BN)en_UK
dc.subjectpetri netsen_UK
dc.subjectoffshore energyen_UK
dc.titleAdvanced reliability analysis of complex offshore Energy systems subject to condition based maintenance.en_UK
dc.typeThesis or dissertationen_UK
dc.type.qualificationlevelDoctoralen_UK
dc.type.qualificationnamePhDen_UK

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