基于融冰式变风量调节的真空管道列车热环境控制系统研究

Research on Thermal Environment Control System of Vacuum Pipeline Train Based on Ice-melting Variable Air Volume Regulation

为了克服真空管道列车无新风、散热困难的问题,文章提出了一种基于融冰储热和变风量调节的新型热环境控制系统,该系统在列车运行期间通过冰的相变潜热吸收车内余热,同时采用变风量系统弥补融冰换热带来的问题。建立了一维AMESim与三维CFD联合仿真的热环境控制系统数值计算模型,研究了变风量和蓄冰板结构对车内温度和系统制冷性能的影响。研究结果表明:采用变风量时,可将热环境控制系统的有效控制时间增加5.7倍,冰块利用率增加6.1%,平均制冷量提升9%;融冰换热设备内蓄冰板厚度对热环境控制系统的有效控制时间影响较大,蓄冰板厚度为0.032 m的热环境控制系统比蓄冰板厚度为0.041 m的热环境控制系统有效控制时间增加了73.1%~82.1%;融冰换热设备内蓄冰板长度对热环境控制系统的有效控制时间影响较小,蓄冰板长度为1.4 m的热环境控制系统比蓄冰板长度为1.1 m的热环境控制系统的有效控制时间增加了5.17%~5.97%。

In order to overcome the problems of no fresh air and difficult heat dissipation in vacuum pipeline trains,this paper proposes a new thermal environment control system based on ice-melting heat storage and variable air volume regulation.The system absorbs the residual heat inside the train through the latent heat of phase change of ice during train operation,and adopts variable air volume system to make up for the problems caused by ice-melting heat transfer.A numerical model of thermal environment control system based on one-dimensional AMESim and three-dimensional CFD simulation is established,and the effects of the variable air volume and ice storage plate structure on the interior temperature and cooling performance of the system are studied.The results of the study showed that the effective control time of the thermal environment control system could be increased by 5.7 times,the ice utilization rate increased by 6.1%and the average cooling capacity increased by 9%when variable air volume was used.The thickness of the ice storage plate in the ice-melting heat exchange equipment has a great influence on the effective control time of the thermal environment control system.The effective control time of the thermal environment control system with the ice storage plate thickness of 0.032 m is 73.1%~82.1%higher than that of the thermal environment control system with the ice storage plate thickness of 0.041 m.The effective control time of the thermal environment control system is less affected by the length of the ice storage plate in the ice-melting heat exchange equipment,and the effective control time of the thermal environment control system with the ice storage plate length of 1.4 m is increased by 5.17%~5.97%than that of the thermal environment control system with the ice storage plate length of 1.1 m.