地铁隧道岩土体取热蓄冷系统的效果及参数分析
Effectiveness and Parameter Analysis of Heat Extraction and Cold Storage System for Rock and Soil in Subway Tunnel
姚曙光 1夏才初2
作者信息
- 1. 宁波大学岩石力学研究所,浙江 宁波 315211
- 2. 宁波大学岩石力学研究所,浙江 宁波 315211;宁波市能源地下结构重点实验室,浙江 宁波 315211
- 折叠
摘要
地铁运行后,由于隧道封闭性导致列车产生的热量无法及时散发或排出,使隧道周围岩土体温度不断上升、隧道内热环境不断恶化.为解决地铁隧道内热堆积问题,将岩土体取热蓄冷系统应用在地铁隧道内.在混凝土管片中布置热交换管,通过管内低温水流动降低混凝土管片和岩土体温度,从而为地铁隧道营造较舒适的热环境.采用流-热耦合数值模拟计算方法,评价系统运行效果,并计算水流速和系统运行模式对岩土体温度的影响.结果表明,该系统有效解决隧道内热堆积问题,可长期有效运行.
Abstract
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.
关键词
地铁/热堆积/换热器/耦合/数值模拟Key words
subways/heat accumulation/heat exchanger/couplings/simulation引用本文复制引用
基金项目
浙江省自然科学基金(LZ22E080008)
出版年
2024
NETL
NSTL
维普
万方数据