Ventilation control algorithm in a metro tunnel based on a thermal balance model

Based on the thermal balance model developed by the authors for the system of two parallel metro tunnels – surrounding soil, an algorithm is proposed, which allows in real-time to determine the ventilation mode based on meteorological data and data on the intensity of train traffic, ensuring comfortable air temperature in the tunnel. Our model takes into account seasonal fluctuations in atmospheric air temperature; heat exchange on the earth surface; heat generation in the tunnel and mechanical ventilation. For real parameters of the functioning of the Moscow metro and a typical climatic year of the Moscow region, the results of mathematical modeling are presented, demonstrating the effectiveness of the proposed algorithm. It is shown that the algorithm significantly reduces the amplitude of seasonal fluctuations of the air temperature in the tunnel, bringing its value closer to the optimal.