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DOI	10.1016/j.applthermaleng.2018.11.076
	Influence of dry ambient conditions on performance of underground medium-voltage DC cables
	Hruska, Marina 1; Clauser, Christoph 1; De Doncker, Rik W.2
通讯作者	Hruska, Marina
来源期刊	APPLIED THERMAL ENGINEERING
ISSN	1359-4311
出版年	2019
卷号	149 页码:1419-1426
英文摘要	In its publication IEC 60287, the International Electrotechnical Commission recommends procedures for thermal analysis of power cables in the presence of a dry-out zone in the surrounding medium. It is well known, that the ampacity of cables depends strongly on the so-called critical temperature at which the surrounding medium dries out. However, research on how to estimate this critical temperature has been limited. In semi-arid Mediterranean climate regions, dry summers typically lead to a decrease of the critical temperature. In this paper, the critical temperature is calculated for a field in Riverside, California under various ambient conditions. This is done from the numerical solution of the differential equation for moisture content in the planar case of steady-state coupled heat and mass transfer in porous media. Finite-difference simulations of a system of two medium-voltage DC cables in this field are performed with SHEMAT-Suite (Simulator of HEat and MAss Transport) to compute the maximum temperature for daily cases of calculated critical temperature and compared to a prediction from IEC 60287. It is found that large day-to-day variations in field conditions in a semi-arid area may significantly affect the maximum allowable current. Our results emphasize the importance of ambient conditions for the cable performance.
英文关键词	Heat transfer Soil drying Underground power cables Numerical simulation
类型	Article
语种	英语
国家	Germany
收录类别	SCI-E
WOS记录号	WOS:000460492300124
WOS关键词	POWER-CABLES ; HYDRAULIC CONDUCTIVITY ; NUMERICAL-SIMULATION ; HEAT DISSIPATION ; THERMAL BACKFILL ; TEMPERATURE ; SOILS ; VAPOR ; WATER
WOS类目	Thermodynamics ; Energy & Fuels ; Engineering, Mechanical ; Mechanics
WOS研究方向	Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214281
作者单位	1.Rhein Westfal TH Aachen, Inst Appl Geophys & Geothermal Energy GGE, FEN Res Campus, D-52074 Aachen, Germany; 2.Rhein Westfal TH Aachen, Inst Power Generat & Storage Syst PGS, FEN Res Campus, D-52074 Aachen, Germany
推荐引用方式 GB/T 7714	Hruska, Marina,Clauser, Christoph,De Doncker, Rik W.. Influence of dry ambient conditions on performance of underground medium-voltage DC cables[J],2019,149:1419-1426.
APA	Hruska, Marina,Clauser, Christoph,&De Doncker, Rik W..(2019).Influence of dry ambient conditions on performance of underground medium-voltage DC cables.APPLIED THERMAL ENGINEERING,149,1419-1426.
MLA	Hruska, Marina,et al."Influence of dry ambient conditions on performance of underground medium-voltage DC cables".APPLIED THERMAL ENGINEERING 149(2019):1419-1426.