Heat balance model for long-term prediction of the average temperature in a subway tunnel and surrounding soil

For a long-term forecast of the average air temperature in metro tunnel and surrounding soil, heat balance conditions are modeled system that includes two parallel tunnels, near-tunnels underground space, earth's surface atmospheric with seasonal variation. It is assumed tunnels well mixed, thermal effect ventilation taken into account by replacing air. The equations solved numerically finite element method. A numerical analysis influences model parameters on soil carried out. dimensions region an elevated temperature, located between estimated.