Mechanism of backfill thermal utilization adsorption cooling system in deep mine

The main problems of existing cooling system in deep mine were high energy consumption and high humidi- ty. Backfill thermal utilization adsorption cooling system in deep mine was designed to solve the problems mentioned above. It consists of three subsystems:air handling unit,backfill thermal subsystem and mine water subsystem. Backfill thermal is used as the regenerative heat source for desiccant wheel of air handling unit. Mine water is used as the cold source for surface cooler of air handling unit. First working principle of this system was presented,then the thermody- namic process of this system was analyzed,next thermal performance analysis was described. A mine working face with backfill thermal utilization adsorption cooling system was tested. The results show that the handling air temperature of the system is 8. 9 ℃ lower than before and the relative humidity is 52. 9% lower than before. It has the merits of better thermal comfort and low energy consumption. The system can be applied in high temperature mine with filling mining.