综合管廊热力舱在机械通风模式下温度场的模拟分析

Simulation Analysis of Temperature Field for Thermal Compartment in the Utility Tunnel

综合管廊是提升城市韧性发展及综合承载力的新兴基础设施,热力管道作为入廊高危管道,其运维安全及所属舱室环境安全是保证管廊正常运行的前提条件。热力舱温度场对管线及设备的可靠运行、运维人员的安全工作环境、以及管线相容性等方面都有重要影响。本文采用数值模拟的方法对综合管廊内热力舱的温度场及影响因素进行了研究。研究表明在2次/h的机械通风模式下,舱室存在过冷现象。通风量和通风速度都是影响温度场分布规律的重要因素,通风量主要调节热力舱中后段温度场,通风速度能有效优化热力舱入口端和出口端温度场分布,从而为入廊热力管道的安全运行和标准化研究提供参考依据。

The urban underground utility tunnel is an emerging infrastructure that can enhance the resilient development and comprehensive bearing capacity of the city.As a high-risk pipeline into the utility tunnel,the safety of pipelines and the compartment in which they are located are prerequisites for the normal operation of utility tunnel.The suitable temperature field of thermal compartment has important influence on the reliable operation of pipeline and equipment,the safe working environment of operation of maintenance personnel and the compatibility of pipeline.In this paper,the temperature field and the influencing factors of the temperature field in the utility tunnelwere studied by using numerical simulation method.The research shows that under the mechanical ventilation mode of 2 times/h,the temperature of the front of the compartment is supercooled.Both ventilation rate and ventilation speed are important factors which affect the temperature field distribution.Ventilation rate mainly regulates the temperature field in the middle-side and end-side section of the thermal compartment.In addition,ventilation speed can effectively optimize the temperature field distribution at the inlet and outlet ends of the thermal compartment.Therefore,it provides reference for safety operation and standardization study of thermal pipeline in the utility tunnel.