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Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
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https://doi.org/10.5194/wes-2019-102
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-2019-102
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 02 Apr 2020

Submitted as: research article | 02 Apr 2020

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This preprint is currently under review for the journal WES.

Re-design of an upwind rotor for a downwind configuration: design changes and cost evaluation

Gesine Wanke1, Leonardo Bergami1, Frederik Zahle2, and David Robert Verelst2 Gesine Wanke et al.
  • 1Blade Science Center Suzlon, Vejle, Denmark
  • 2DTU Wind Energy, Technical University of Denmark, Roskilde, Denmark

Abstract. Within this work, an existing model of a Suzlon S111 2.1 MW turbine is used to estimate potential cost savings when the conventional upwind rotor concept is changed into a downwind rotor concept. A design framework is used to get realistic design updates for the upwind configuration as well as two design updates for the downwind configuration, including a pure material cost-out on the rotor blades and a new planform design. A full design load basis according to the standard has been used to evaluate the impact of the redesigns on the loads. A detailed cost model with load scaling is used to estimate the impact of the design changes on the turbine costs and the cost of energy. It is shown that generally lower blade mass can be achieved with the downwind configurations of up to 5 % less than the upwind redesign. Compared to an upwind baseline, the upwind redesign shows an estimated cost of energy reduction of 2.3 % where the downwind designs achieve a maximum reduction of 1.3 %.

Gesine Wanke et al.

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Gesine Wanke et al.

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Latest update: 07 Jul 2020
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Short summary
This article regards a rotor redesign for a wind turbine in upwind and in downwind rotor configuration. A simple optimization tool is used to estimate the aerodynamic planform as well as the structural mass distribution of the rotor blade. The designs are evaluated in full load base calculations according to the IEC-standard with the aeroelastic tool HAWC2. A scaling model is used to scale turbine and energy costs from the design loads and compare the costs for the turbine configurations.
This article regards a rotor redesign for a wind turbine in upwind and in downwind rotor...
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