EQUIPMENT PARAMETERS OF EVAPORATIVE AIR COOLING SYSTEMS IN UNDERGROUND SUBWAY TUNNELS
I. V. Lugin, E. L. Alferova
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Tunnel ventilation, microclimate, subway, warm season of year, heat excesses, evaporative air cooling
Abstract
The paper presents the results of computational modeling of evaporative cooling of tunnel air during the phase transition of water from a liquid to a gaseous state in subway tunnel conditions at various parameters of spraying equipment. It is shown that this method significantly reduces the requirements for ventilation equipment in comparison with the method of removing heat excesses by ventilation alone. To remove heat excesses by ventilation alone, the capacity of one fan (with two fans running in parallel) is up to 269 m3/s, and the power is 727 kW. When using evaporative air cooling, the maximum capacity of one fan is 67.5 m3/s with a power of 104 kW, the pump power does not exceed 50 kW with a maximum water flow rate of 1.5 m3/h.
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