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On the Optimum Sizing of a Real WEC From a Techno-Economic Perspective

[+] Author Affiliations
Adrian de Andres, Henry Jeffrey

University of Edinburgh, Edinburgh, UK

Jéromine Maillet, Jørgen Hals Todalshaug, Patrik Möller

CorPower Ocean, Stockholm, Sweden

Paper No. OMAE2016-54110, pp. V006T09A013; 11 pages
doi:10.1115/OMAE2016-54110
From:
  • ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 6: Ocean Space Utilization; Ocean Renewable Energy
  • Busan, South Korea, June 19–24, 2016
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-4997-2
  • Copyright © 2016 by ASME

abstract

When designing “multi-MW arrays” of Wave Energy Converters (WECs), having a low number of converters with high individual power ratings can be beneficial as the Operation and Maintenance (O&M) costs may be reduced. However, having converters of small dimensions or small power ratings could also be beneficial as suggested by previous works due to a reduction in material costs as compared to power production, the use of small, inexpensive vessels.

In this work, a case study investigating the optimum size of WEC for a 20MW array is performed. Analysis is carried out based on the CorPower Ocean technology. In this case study, firstly a Levelized Cost of Energy (LCOE) model is created. This model incorporates the latest Capital Expenditure (CAPEX) estimates for CorPower Ocean’s 250 kW prototype. Using this techno-economic model, several sizes/ratings of WEC are tested for use in a 20 MW array.

Operational Expenditure (OPEX) is calculated using two different calculation approaches in order to check its influence on final indicators. OPEX is firstly calculated as a percentage of CAPEX, previous works, and secondly using a failure-repair model, taking into account individual failures of WECs in the array. Size/rating analysis is carried out for several European locations in order to establish any dependence between site location and optimal WEC size/rating.

Copyright © 2016 by ASME

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