Abstract
Crosswind kite power replaces the tower and the support structure of a conventional wind turbine by a lightweight tether leading to a potentially lower levelized cost of electricity. However, in this chapter it is shown that tethering the kite to the top of a tower instead of to the ground can have advantages: Most notably, the “cosine loss” is reduced, i.e. the misalignment of the wind velocity vector and the direction of the traction power transfer. Hence, a tower can increase the power and energy yield up to about the double. Even for small tower heights compared to the kite’s operation altitude, a significant efficiency increase can be obtained. Further advantages of a tower are highlighted e.g. for the autonomous start and landing and for the wind velocity measurement. Possible tower concepts are illustrated.
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Acknowledgements
The authors thank the anonymous reviewers and the editors for their helpful comments. This study was supported by Bund der Freunde der TU München e.V.
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Bauer, F., Hackl, C.M., Smedley, K., Kennel, R.M. (2018). Crosswind Kite Power with Tower. In: Schmehl, R. (eds) Airborne Wind Energy. Green Energy and Technology. Springer, Singapore. https://doi.org/10.1007/978-981-10-1947-0_18
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DOI: https://doi.org/10.1007/978-981-10-1947-0_18
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