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Investigation of possibilities to analyze corrosion and discontinuities at early stages in wind turbine foundations
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
2017 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Corrosion and cracks in wind turbine foundations is a major risk in wind technology.  Various examples of wind parks in Europe show, that after installation, little is done about maintenance in respect to damages to foundations. Inspections of wind turbines are still in many cases limited to visual inspections, therefore there is a need to diagnose damage in early stages before the damage becomes obvious and repairing a component can become very expensive. This could be avoided by using various techniques that allow detecting damages of concrete and metals before it can be seen. Various non-destructive analysis methods were analyzed in respect to their applicability to detect damage of concrete foundations and monopole foundations offshore, both for accessible and non-accessible parts. Furthermore, economical aspects of the equipment were considered together with the level of experience needed to process and analyze the results. The scores were given to the methods to find the best suited method for concrete and metal parts. The main conclusion of the thesis is that X-Ray, ultrasound/radar and resistivity/conductivity measurements are the most suited for testing early damage of wind turbine foundations in field conditions. Eddy Current Testing, Magnetic particle inspection and Dye Penetrant testing were better suited for industrial and laboratory testing of failed components.

Place, publisher, year, edition, pages
2017.
Keyword [en]
Wind power, corrosion, concrete, offshore
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:uu:diva-320439OAI: oai:DiVA.org:uu-320439DiVA: diva2:1089572
Subject / course
Wind Power - Bachelor's Thesis in Wind Power Project Management
Supervisors
Examiners
Available from: 2017-05-03 Created: 2017-04-20 Last updated: 2017-05-03Bibliographically approved

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