Title :
Thermal analysis of cables in tunnel using SUPG finite element method
Author_Institution :
Hebei Univ. of Sci. & Technol., Shijiazhuang, China
Abstract :
In this paper thermal analysis and ampacity evaluation of underground power cables that are placed in Tunnel are presented. A Streamline-upwind/Petrov-Galerkin (SUPG) stabilized finite element method is proposed to solve the air governing formulations in the region between the cables and the retaining tunnel in the underground power transmission system. In thermal analysis, a nonlinear-coupled electromagnetic-thermal model of underground cables and the radiation heat exchanges between external cables surface and internal tunnel surface is proposed. The analysis reveals that the convection induced heat exchange is much stronger than the conduction induced heat exchange in the air between external cables surface and internal tunnel surface. At last, Newton-Rahpson iteration method is used to evaluate the cable ampacity.
Keywords :
Galerkin method; Newton-Raphson method; convection; finite element analysis; heat conduction; heat radiation; power cables; thermal analysis; tunnels; underground cables; underground transmission systems; Newton-Rahpson iteration method; SUPG finite element method; ampacity evaluation; cable surface; cable thermal analysis; conduction-induced heat exchange; convection-induced heat exchange; nonlinear-coupled electromagnetic thermal model; radiation heat; streamline-upwind-Petrov-Galerkin stabilized FEM; tunnel surface; underground power cables; underground power transmission system; Soil; Thermal conductivity; Cable Ampacity; Coupled Analysis; Finite Element Method; SUPG Stabilized Formulation; Thermal Field; Tunnel;
Conference_Titel :
Industry Applications Society Annual Meeting (IAS), 2011 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4244-9498-9
DOI :
10.1109/IAS.2011.6074407
