隧道通风过程中空气湿热状态变化研究

摘要

Underground engineering such as tunnel and roadway in the construction and operation stages need some ventilation modes such as natural or mechanical ventilation so as to maintain the fresh air and the comfort of personnel in the tunnel and under-ground engineering. Nowadays, most researches focus on the air quality and smoke transmissivity in the process of tunnel ventilation, while the change of air moist thermal state in the process of tunnel ventilation receives little attention. On the basis of the basic theories of thermodynamics and fluid mechanics, the change of air moist thermal state in the process of long distance and mass fresh air trans-portation with tunnel ventilation is under study. Through the argument, there would be a large variety for the after long tunnel transpor-tation. It suggests that, in the process of tunnel ventilation, there would be a little rise of the air moist thermal state temperature under the heat preservation effect of constant temperature strata in spite of the process of the fan working and friction heat production;and the humidity will rise to saturation. And there will be a certain degree guiding significance to the research design of air-conditioning sys-tem in the underground engineering such as underground storage and underground mining.%隧道及巷道等地下工程在施工及运营阶段需要以自然或机械通风设施等方式进行通风，以保持充足的新鲜空气量，并维持其内人员的舒适感。当前大多研究集中在隧道通风过程中的空气质量以及烟雾透过率，而较少关注通风过程中空气的湿热状态的变化。以热力学及流体力学的基本理论为基础，研究地下隧道长距离、大规模地下输送新鲜空气过程中，隧道内空气湿热状态的变化。通过论证，在经过隧道长距离输送后，空气湿热状态参数发生较大变化。这说明，空气在地下输送过程中，尽管有风机做功以及摩擦生热过程，但在恒温层的保温作用下，温度只会略有上升；而湿度则会升至饱和状态。这将对地下储库、地下采矿等地下工程的空气调节系统设计研究工作有一定指导意义。