Feasibility analysis of application of capillary wall heat exchanger to underground railway tunnel

Aiming at the problems of difficult layout of cooling towers, large energy consumption in operation and poor economical performance in the underground railway station with water-cooled refrigerating units, puts forward an air conditioning system, which taking the capillary mat as front-end heat exchanger of ground-source heat pump system by laying it into underground railway tunnel walls. Analyses the heat transfer characteristics of the capillary wall heat exchanger by simulation, and compares the economical performance between the system and conventional air conditioning systems. The result shows that the capillary wall heat exchanger has better heat transfer characteristics and economical performance.