Effectiveness and Parameter Analysis of Heat Extraction and Cold Storage System for Rock and Soil in Subway Tunnel
After the operation of the subway,due to the closed nature of the tunnel,the heat generated by the train cannot be emitted or discharged in a timely manner,so that the temperature of rock and soil around the tunnel continues to rise,and the thermal environment inside the tunnel deteriorates continuously.In order to solve the problem of heat accumulation in subway tunnels,a heat extraction and cold storage system for rock and soil is applied in the subway tunnel.The heat exchange tubes are arranged in the concrete segment to reduce the temperature of the concrete segment and the rock and soil through the flow of low-temperature water inside the tubes,thus creating a more comfortable thermal environment for the subway tunnel.The computational method of coupled flow-heat numerical simulation was used to investigate the effect of system operation and to calculate the effect of water flow rate and system operation mode on the temperature of rock and soil.The results show that,the system can effectively solve the problem of heat accumulation in the tunnel,and the system can be operated effectively for a long period of time.
NETL
NSTL
万方数据
维普
