Design scheme of underground railway environmental control system in severe cold zone

 There are two types of underground railway environmental control system in public area including air conditioning systems and ventilation systems. At present, many researches focus on the use of air conditioning systems, but few studies on the use of ventilation systems. The northeast and northwest regions of China locate in the severe cold zone. The ventilation system is widely used in public areas. The current underground railway projects putting into operation have the problem that the indoor temperature of the station is not satisfied with the requirements of standard in winter. Taking a design scheme of the underground railway environmental control system of Hohhot as an example, based on the investigation in severe cold zone, carries out a research by the simulation calculation software such as CFD and SES, and proposes a design scheme of the environmental control system suitable for severe cold zone.