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12. Lifetime Extension, Repowering or Decommissioning? Decision Support for Operators of Ageing Wind Turbines

Author

Piel, J.H., Stetter, C., Heumann, M., Westbomke, M., Breitner, M.H., Piel, J.H., Stetter, C., Heumann, M., Westbomke, M., and Breitner, M.H.

Abstract

In Germany, more than one third of the installed wind energy capacity will leave the feed-in tariff funding between 2021 and 2025. Operators of affected turbines are therefore increasingly concerned with the design of profitable end-of-funding strategies. This requires feasibility analyses of both lifetime extension and repowering options and entails the subsequent challenge to determine the optimal lifetime extension and corresponding repowering timing. To support operators and other stakeholders dealing with wind turbines' end-of-life issues, this study presents a geographic information system that permits evaluating optimal end-of-funding strategies at different spatial scales reaching down to detailed analyses on individual turbine level. The decision support system processes topographic, wind, turbine, and finance data in an integrated system of resource simulations, spatial planning analyses and economic viability assessments. Case-study results show that a uniform end-of-funding strategy cannot be applied to all ageing turbines. Conducted sensitivity analyses rather indicate that the best strategy highly depends on various turbine-specific aspects, especially the location, type and maintenance costs as well as exogenous factors, including the developments of electricity spot market prices and tendered feed-in premiums. In light of latest trends regarding the exogenous factors, lifetime extension and repowering potentials increase. However, the results also indicate that dismantling, disposal and recycling of numerous ageing turbines will become a major challenge for the wind energy sector in the next decade. © 2019 Published under licence by IOP Publishing Ltd.

Published
2019

18. New aspects on bridge design for durability

Author

M. Empelmann, G. Heumann M. Wichers, and V. Henke

Subjects
Engineering, business.industry, Structural engineering, business, Bridge (interpersonal), Durability
Published
2008

24. Mindestmengen

Author

Roeder, N., primary, Wenke, A., additional, Heumann, M., additional, and Franz, D., additional

Published
2007
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26. COPD and Occupational Exposures: A Case-Control Study

Author

Weinmann, S, primary, Vollmer, W M, additional, Breen, V, additional, Heumann, M, additional, Hnizdo, E, additional, Villnave, J, additional, Doney, B, additional, Graziani, M, additional, McBurnie, M A, additional, and Buist>, S, additional

Published
2006
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48. An outbreak of watermelon-borne pesticide toxicity.

Author

Green, M A, primary, Heumann, M A, additional, Wehr, H M, additional, Foster, L R, additional, Williams, L P, additional, Polder, J A, additional, Morgan, C L, additional, Wagner, S L, additional, Wanke, L A, additional, and Witt, J M, additional

Published
1987
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50. The View-Master health study focus groups.

Author

Krall K, Douglas J, Perrin NA, Austin D, Lambert WE, and Heumann M

Abstract

Trichloroethylene (TCE), a common groundwater contaminant, was found at high levels at an Oregon work site in 1998. According to a recent report released by the National Research Council, 'the evidence on carcinogenic risk and other health hazards from exposure to trichloroethylene has strengthened since 2001.' A convenience sample of 13 former workers from the Oregon work site was recruited for a series of focus groups. Information obtained on plant processes, safety procedures, attitudes regarding medical record access, and opinions about proxy accuracy was subjected to qualitative content analysis. Workers recalled few safety policies and no training or support for control of safety. Most thought co-workers and family members would be the best source of proxy exposure information and favored granting access to medical records. Job-role mobility confirmed the importance of using a job or task exposure matrix. Information obtained will be used in development of an exposure assessment interview tool. [ABSTRACT FROM AUTHOR]

Published
2008

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