Hiroshi KAJIYAMA
One of the main purposes in ventilating underground tunnels is to prevent an intolerable air temperature rise in summer season. An environmental simulation of subway shows a relation between ventilation volume and air temperature in tunnel and it suggests an efficient operation of the ventilation system. A more precise simulation will contribute to the down-sizing of the ventilation system and the decrease of energy consumption. We are now developing new simulation programs which are applicable to high-speed trains running through deep-underground railway tunnels.