Research on the ventilation effect of gas insulated transmission line pipe galleries
MA Xiuting
ZHANG Wenke
YAO Haiqing
WANG Kangyue
XU Bin
GAO Yuxue
Abstract：The ventilation system of the gas insulated transmission line(GIL)tunnel is deeply studied by combining theoretical analysis with numerical simulation.Based on the underground GIL tunnel project,this project adopts a ventilation method combining natural air intake and mechanical exhaust.Through the waste heat removal method and the calculation method based on the air change rate,the appropriate ventilation volume required for the tunnel in summer is determined.Based on the structural characteristics of the GIL utility tunnel,corresponding physical and mathematical models are constructed,and the initial conditions and boundary conditions are reasonably set.Simulate and analyze the temperature distribution inside the pipe gallery under different ventilation volumes,and discuss the temperature variation trend in the breathing zone area under different air change rates.The results show that the air temperature along the Z-axis of the pipe gallery is gradually rising,and the temperature at the top is generally higher than that at the bottom.When the air volume calculated by the waste heat elimination method is used for simulation,high-temperature gas exceeding the specifications appeared at the end of the pipe gallery.The research results provide a reference for the design and optimization of the ventilation system in the GIL tunnel,which is conducive to promoting the development of the ventilation system in practical applications.
Keywords：underground pipe galleryGILventilationair exchange ratenumerical simulationwaste heat removal method
Publication Date：2025-08-30
Online Publishing Date：2025-10-22(First online date of this platform, not the publication date of the document)
Pages：5( 67-71 )