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  Fully Coupled Moisture and Heat Transfer for Power Cable Rating

Pham, H., Schedel, M., Ohagen, M., Sass, I. (2024): Fully Coupled Moisture and Heat Transfer for Power Cable Rating. - In: Ha-Minh, C., Pham, C. H., Vu, H. T. H., Huynh, D. V. K. (Eds.), Proceedings of the 7th International Conference on Geotechnics, Civil Engineering and Structures, CIGOS 2024, 4-5 April, Ho Chi Minh City, Vietnam, (Lecture Notes in Civil Engineering ; 482), Singapore : Springer, 833-840.
https://doi.org/10.1007/978-981-97-1972-3_93

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Item Permalink: https://gfzpublic.gfz.de/pubman/item/item_5035273 Version Permalink: https://gfzpublic.gfz.de/pubman/item/item_5035273_1
Genre: Book Chapter

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 Creators:
Pham, Hung1, Author
Schedel, Markus1, Author
Ohagen, Max1, Author
Sass, Ingo2, Author           
Affiliations:
1External Organizations, ou_persistent22              
24.3 Geoenergy, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146039              

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 Abstract: To effectively incorporate renewable energies, the electrical power grid requires the extension or construction of numerous transmission lines. In addition to the traditional overhead lines, an increasing number of grid expansions are being carried out with underground power cables.

The heat that is produced during the operation of the cables has to be dissipated to the environment. Thus, the current carrying capacity of an underground power cable system depends strongly on the thermal properties of the surrounding bedding material and soil. In addition, local drying-out may occur in the vicinity of the cable. As a result, power cable rating models often employ a two-zone approach for the consideration of partial soil drying-out, dividing the cable bedding into two distinct areas (wet and dry). In this model approach, each zone is assigned with a constant thermal conductivity value. However, in reality, the process is more complex. The apparent thermal conductivity varies and depends on the moisture content of the backfill and soil materials, which, in turn, is influenced by temperature and other hydraulic boundary conditions.

This paper compared cable rating results obtained from the two-zone model, IEC 60287-1-1, and a fully coupled model that considers moisture-heat transfer. The results obtained from IEC 60287-1-1 and the two-zone model were similar, while the fully coupled moisture-heat transfer model showed a 30% increase.

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 Dates: 20242024
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1007/978-981-97-1972-3_93
GFZPOF: p4 T8 Georesources
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Title: Proceedings of the 7th International Conference on Geotechnics, Civil Engineering and Structures, CIGOS 2024, 4-5 April, Ho Chi Minh City, Vietnam
Source Genre: Book
 Creator(s):
Ha-Minh, Cuong1, Editor
Pham, Cao Hung1, Editor
Vu, Hanh T. H.1, Editor
Huynh, Dat Vu Khoa1, Editor
Affiliations:
1 External Organizations, ou_persistent22            
Publ. Info: Singapore : Springer
Pages: - Volume / Issue: 482 Sequence Number: - Start / End Page: 833 - 840 Identifier: ISSN: 2366-2557
ISSN: 2366-2565
ISBN: 978-981-97-1971-6
ISBN: 978-981-97-1972-3

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Title: Lecture Notes in Civil Engineering
Source Genre: Series
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Publ. Info: -
Pages: - Volume / Issue: 482 Sequence Number: - Start / End Page: - Identifier: -