Abstract
Since the heat cannot be removed easily from the air in the confined space like subway tunnels, it can be difficult to maintain the thermal environment in such places at adequate level without mechanical ventilation. Prediction methods of the air temperature help design ventilation of a new line or the improvement of the ventilation of existing lines. Predictions of the thermal environment in subway tunnels have been made in RTRI up to now. As a large data set of thermal environment such as air temperature has been obtained by long-term measurement in a subway tunnel, the prediction method was validated by the data. The result of the validation shows that the difference between the air temperatures calculated by the method and those measured in the tunnel is within about three degrees Celsius.
