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Energies 2018, 11(3), 545; https://doi.org/10.3390/en11030545

Thermal Rating of Offshore Wind Farm Cables Installed in Ventilated J-Tubes

1
School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China
2
School of ITEE, The University of Queensland, Brisbane 4109, Australia
3
Guangdong Electric Power Design Institute Co. Ltd. of China Energy Engineering Group, Guangzhou 510663, China
*
Author to whom correspondence should be addressed.
Received: 31 January 2018 / Revised: 1 March 2018 / Accepted: 1 March 2018 / Published: 3 March 2018
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

The section of submarine cable that is installed in enclosed J-tubes represents a possible thermal limiting point along the export circuits of offshore wind farms (OWFs). To obtain higher continuous thermal ratings for J-tube systems, a ventilated design, realized by allowing for the flow of natural wind into the J-tube through vents, is considered in this paper. To evaluate the performance of this forced-ventilation design, a coupled three-dimensional (3D) numerical model is constructed using the computational fluid dynamics (CFD) technique. The CFD method is first successfully tested through comparisons with existing methods for enclosed J-tubes. Then, the cable rating for the ventilated design is determined using the CFD model and compared with the rating for the enclosed case. The results show that the cooling effect from forced ventilation is obvious, and the cable rating could be increased by up to 27.5% for a wind speed of 10 m/s. This improvement in rating is especially significant for OWFs where the export circuit output is limited by the cable rating in enclosed J-tubes. View Full-Text
Keywords: J-tube; submarine cable; rating; forced ventilation; wind; computational fluid dynamics (CFD); offshore wind farm (OWF) J-tube; submarine cable; rating; forced ventilation; wind; computational fluid dynamics (CFD); offshore wind farm (OWF)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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You, L.; Wang, J.; Liu, G.; Ma, H.; Zheng, M. Thermal Rating of Offshore Wind Farm Cables Installed in Ventilated J-Tubes. Energies 2018, 11, 545.

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