Deep-buried tunnels are widely used in underground space for transportation and air ventilation. Accurately predicting the heat and mass transfer process of the ventilation in a tunnel is conducive to the design optimization of air conditioning and utilization of thermal pressure for underground buildings. The air condensation process has an important impact on the variation of air parameters in the tunnel. The Z-transfer coefficient method cannot accurately calculate the air parameters when the air condensation process occurs. To resolve this problem, in this study, the computational domain is redefined and a fast calculation model is proposed for heat and mass transfer in a deep-buried underground tunnel. The calculation results of this model are in good agreement with the field test results. Moreover, when calculating the hourly parameters of ventilation for a year, the running time of the new model is less than half of the finite difference method model. Considering the hourly parameters of ventilation for a certain number of days, the new model has a higher calculation efficiency. In addition, a case study was conducted to demonstrate the significance of considering the air condensation process in the model. If the calculation results of the model considering air humidity and condensation are taken as a reference, the absolute error of air temperature at the tunnel exit and the relative error of the thermal pressure, calculated by the model ignoring air humidity, can respectively reach 1.94 °C and 34%.

深埋隧道广泛用于地下空间的运输和通风。准确预测隧道通风的传热传质过程，有利于地下建筑空调的设计优化和热压利用。空气凝结过程对隧道内空气参数的变化有重要影响。Z-传递系数法无法准确计算发生空气冷凝过程时的空气参数。为了解决这个问题，本研究重新定义了计算域，并提出了深埋地下隧道传热传质的快速计算模型。该模型的计算结果与现场试验结果吻合较好。而且，在计算一年的通风小时参数时，新模型的运行时间不到有限差分法模型的一半。考虑到一定天数的每小时通风参数，新模型具有更高的计算效率。此外，还进行了一个案例研究，以证明在模型中考虑空气冷凝过程的重要性。如果以考虑空气湿度和凝露的模型计算结果为参考，隧道出口空气温度的绝对误差和忽略空气湿度的模型计算出的热压相对误差可分别达到1.94° C 和 34%。考虑到一定天数的每小时通风参数，新模型具有更高的计算效率。此外，还进行了一个案例研究，以证明在模型中考虑空气冷凝过程的重要性。如果以考虑空气湿度和凝露的模型计算结果为参考，隧道出口空气温度的绝对误差和忽略空气湿度的模型计算出的热压相对误差可分别达到1.94° C 和 34%。考虑到一定天数的每小时通风参数，新模型具有更高的计算效率。此外，还进行了一个案例研究，以证明在模型中考虑空气冷凝过程的重要性。如果以考虑空气湿度和凝露的模型计算结果为参考，隧道出口空气温度的绝对误差和忽略空气湿度的模型计算出的热压相对误差可分别达到1.94° C 和 34%。