Design, operating status and research prospects of ventilation and air conditioning systems in underground railway stations

Analyses the design and operating status of ventilation and air conditioning systems in underground railway stations in China. Pays close attention to the load constitution and their proportions. Discusses the problems to be concerned in load calculation and air conditioning system design. Presents the test results of the actual system operation. The results show that there are excessive outdoor air rate and outdoor air cooling consumption in the environment control systems of underground railway stations. Prospects the design and research of air conditioning system in underground railway stations from the aspects of variation of outdoor air and infiltration air, separate processing of temperature and humidity, outdoor air, cold source, end equipment, etc.