371 / 2018-05-31 22:31:32

Computational evaluation of cooling system under deep hot and humid coal mine in China: a thermal comfort study

HEMS cooling system; thermal comfort; WBGT; hot and humid coal mine

矿山职业健康与环境安全 > 通风

Cooling system is widely used in deep coal mines of China for the increasing heat hazard. Although the greatly controlled air temperature and relative humidity ensured a certain degree of production safety by utilizing of cooling systems, especially by HEMS system, the working conditions are still complained by the workers. An evaluation of the cooling system basing on the thermal comport were necessary. In this article, Onsite experiment and numerical simulation were taken and the cooling effect of HEMS system was evaluated by the index of WBGT. The results indicated that the current outlet parameters (outlet air temperature,RH and velcocity respectively are 18°C, 80% and 1.5m/s) would not make the workers in all of the tunnels feel comfortable and the RH in the tunnel would be reduced to 60% to satisfy all of the workers in the whole tunnel. The results would be beneficial to the optimizing of cooling under deep coal mine.