Open AccessCOMPUTATIONAL SIMULATION OF THE EVAPORTIVE AIR COOLING PROCESS IN A SUBWAY TUNNEL
Author(s) -
Е В Алферова
Publication year - 2021
Publication title -
interèkspo geo-sibirʹ
Language(s) - English
Resource type - Journals
ISSN - 2618-981X
DOI - 10.33764/2618-981x-2021-2-3-115-122
Subject(s) - evaporative cooler , ventilation (architecture) , airflow , work (physics) , volumetric flow rate , environmental science , flow (mathematics) , power (physics) , air cooling , water cooling , mechanics , nuclear engineering , mechanical engineering , engineering , thermodynamics , physics
The paper shows the possibility of using evaporative cooling of air by spraying water directly in the tunnel. The solution of the problem of modeling the process of removing heat excess from the air during the phase transition of water from the liquid state to the gaseous in the conditions of the metro tunnel is carried out. It is shown that using method significantly reduces the requirements for ventilation equipment in comparison with the method of removing heat surpluses only by mechanical ventilation. When using evaporative cooling method of removing heat surpluses in a subway tunnel, the maximum air flow rate of one fan will be 67.5 m/s with 104 kW power, the power of the pump equipment will be nearly 50 kW, with a water flow rate 1.5 m per hour. When removing heat surpluses only by ventilation, the air flow rate of one fan (with two fans in parallel work) will be up to 269 m/s, and the power will be 727 kW.