期刊名称：TELKOMNIKA (Telecommunication Computing Electronics and Control)
印刷版ISSN：2302-9293
出版年度：2013
卷号：11
期号：3
页码：425-432
DOI：10.12928/telkomnika.v11i3.945
语种：English
出版社：Universitas Ahmad Dahlan
摘要：For further knowledge of the thermal characteristics in g as- i nsulated t ransmission l ines (GILs) installed above ground , a finite-element model of coupling fluid field and thermal field i s established , in which t he corresponding assumptions and boundary conditions ar e given. Transient temperature rise processes of the GIL under the conditions of v ariable ambient temperature, wind velocity and solar radiation are respectively investigated . E quivalent of surface convecti ve heat transfer coefficient and heat flux boundary conditions a re updated i n the analysis process. Unlike the traditional finite element method (FEM), the variability of the thermal properties with temperature is considered. The calculation results ar e validated by the tests results reported in the literature. The conclusion provides method and theory basis for the knowledge of transient temperature rise characteristics of GILs in open environment .
