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多孔介质期刊
影响因子: 1.061 5年影响因子: 1.151 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN 打印: 1091-028X
ISSN 在线: 1934-0508

多孔介质期刊

DOI: 10.1615/JPorMedia.v3.i1.10
pages 1-10

A Comparison of Thermal Performances of Underground Power Cables in Dry and Saturated Soils

G. Buonanno
Dipartimento di Meccanica Strutture Ambiente e Territorio (Di. M. S. A. T.), Università di Cassino, Via Di Biasio 43, 03043 Cassino, Italy
Alberto Carotenuto
Dipartimento di Meccanica Strutture Ambiente e Territorio (Di. M. S. A. T.), Università di Cassino, Via Di Biasio 43, 03043 Cassino, Italy ; and University of Naples "Parthenope", Naples, Italy

ABSTRACT

A model to study the thermal and fluid dynamics behavior of a system made of directly buried electrical cable in a dry or saturated soil is presented. The governing equations are solved via the finite difference method. Different evaluations are carried out assuming different characteristics for the soil and for the electrical loads. The dimensionless results include a comparison between the thermal resistance of dry and saturated soil as well as the functional link between the thermal resistivity of the soil, ρt, evaluated by means of the IEC 287 standard and the dimensionless parameters of the model proposed by the authors. Finally, a correlation for the Nusselt number is determined exclusively in relation to the design data.


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