A multi-criteria decision model to determine intervals of preventive maintenance with equipment reliability degradation due to imperfect maintenance

Dowell, Jethro; Zitrou, Athena; Walls, Lesley; Bedford, Tim; Infield, David

doi:10.1201/b15938-114

Cited by 19 publications

(17 citation statements)

References 2 publications

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“…installing separate blades instead of one assembled rotor, a decrease in the installation duration may be made by up to 30 % (Barlow et al, 2015). Another study done by Dowell et al (2013) also showed a significant decrease in delay for lifting operations with higher wind restrictions. Considering the high vessel charter rates, delay decrease may in turn contribute to large cost reductions.…”

Section: Weather Restrictionsmentioning

confidence: 87%

Strategic Optimization of Offshore Wind Farm Installation

Backe

Haugland

2017

Lecture Notes in Computer Science

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A B S T R A C TThis work describes logistical planning of offshore wind farm installation through mathematical optimization.Two optimization models are developed to analyse cost-effective port and vessel strategies for offshore installation operations. By applying principals of mixed integer linear programming (MILP), the two models seek to minimize total costs through port-and vessel related decisions. The models cover offshore transportation and installation of a given amount of wind turbines. Different vessel strategies, ports, time horizon and weather restrictions are considered in the models. Several deterministic test cases with fixed cost parameters and historic weather data are implemented in AMPL and run with the CPLEX solver. The test cases show promising results in aiding strategic decisions, and the models provide valuable insight into economic impact of such decisions. The results indicate that decision aid could be more reliable if smaller subproblems are considered, potentially in a stochastic framework.

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Section: Weather Restrictionsmentioning

confidence: 87%

Strategic Optimization of Offshore Wind Farm Installation

Backe

Haugland

2017

Lecture Notes in Computer Science

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“…This is achieved through effective remote monitoring, timely availability and access of crew, vessels and helicopters (depending on the distance to the shore, weather and sea conditions). For any given scheduled maintenance operation or failure repair, there is a chance that harsh weather will render the site inaccessible or the operation unsafe to attempt or complete (Dowell et al 2014).…”

Section: Maintenance Strategiesmentioning

confidence: 99%

Open Innovation System and Entrepreneurship: A Case Study of the Offshore Renewable Energy

Igwe¹,

Nwokoro²

2018

Proceedings of the 42nd International Academic Conference, Rome

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This article examines the innovation in the offshore renewable energy (ORE) industry using Open Innovation System (OIS), platforms and network perspective. Despite the benefits of ORE, Operation and Maintenance (O&M) costs account for up to one-third of total wind energy project lifecycle expenditure requiring relationships with multiple external partners to improve the supply chain and O&M activities. Therefore, management of the O&M activities of the supply chain and logistics has become an excellent place to drive efficiency and reduce cost thereby creating innovative products and services, business clusters and job opportunities. Findings show how strategic resources help offshore companies to reduce cost and achieve environmental, economic and social benefit derived from ORE. The OIS is used to explain the importance of new resources in technology, knowledge sharing and relationships, and stresses the role of stakeholders in addressing the challenges. The limitation of this study is related to reliance on secondary data. However, it provided an opportunity to elaborate on OIS theory and reinforces the importance of knowledge sharing, collaboration and network advantage. Overall, this provided insights into the constituent resources needed for successful OIS, regional entrepreneurship and helps move renewable energy research from a technological advancement challenges to a problem of strategic resources and relational capabilities.

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“…When a failure occurs during the winter season, sometimes access to turbines is inaccessible for long periods, resulting in a long periods of downtime and production losses [12]. For example, a transfer system limited by a significant wave height <1.5m, the wait for better conditions of sea is about four days in the summer, 10-15 days in spring and autumn and between 2 and 6 weeks of winter [13].…”

Section: B Optimization Of Operational Resources For the Maintenancementioning

confidence: 99%

Eco-maintenance for complex systems: Application on system of renewable energy production

Tchertchian¹,

Millet²

2014

3rd International Symposium on Environmental Friendly Energies and Applications (EFEA)

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The marine energy sector is experiencing a growing interest; large offshore wind farms continue to emerge, particularly in northern Europe. The electrical energy produced by these turbines is intended as clean and renewable. Operations and Maintenance (O&M) of offshore wind farms is however costly and generating environmental impacts. Indeed in view of the circumstances on the high seas the accessibility to Wind Turbine (WT) is greatly complicated causing long periods of unavailability compared to onshore wind farm. To remedy this, operators will mobilize significant and specific resources (Fast Crew Boat, large boat, helicopters).The use of these vehicles and systems of maintenance can improve the availability of WTs but also degrade the environmental performance of offshore wind farm. The optimization of O&M requires rethinking the concept of maintenance of renewable energy systems in mobilizing the concept of Eco-Maintenance. Eco-Maintenance aims to minimize the environmental losses due to maintenance while maximizing the environmental benefits generated assuming the energy recovered due to better maintenance / availability equivalent to an environmental gain corresponding to the environmental impacts of a thermal power plant should have been put into operation to produce this energy. This approach is tested on an offshore wind farm. In this context, modeling the complex system (Offshore Wind Farm + Maintenance Systems) was developed. The various models show that the environmental performance of Systems of Energy Production and System of Maintenance (SM) are interconnected.

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A multi-criteria decision model to determine intervals of preventive maintenance with equipment reliability degradation due to imperfect maintenance

Cited by 19 publications

References 2 publications

Strategic Optimization of Offshore Wind Farm Installation

Strategic Optimization of Offshore Wind Farm Installation

Open Innovation System and Entrepreneurship: A Case Study of the Offshore Renewable Energy

Eco-maintenance for complex systems: Application on system of renewable energy production

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