Ventilation and air-conditioning technology still faces the test of the diversified development of buildings in its current mature application model, such as the limit of urban public electricity consumption in summer, the investment cost of urban rail transit, the restrictions on air conditioning due to the height of the building, etc., and at the same time, it exceeds The increasingly tight construction space and construction period are also testing the technical level of construction and debugging. This article envisions five air-conditioning modes based on some personal experiences in design, construction, and debugging, hoping to communicate with peers.
 

1.Cooling of urban underground rail transit public areas
 

With the continuous development of urban underground rail transit, its energy consumption has attracted increasing attention. At the same time, energy saving of air conditioning in public areas has become a focus within the industry. At present, domestic urban underground rail transit is mostly shallow subway, in which the underground area is generally divided into station hall level, platform level, equipment room, track area and other parts. The air-conditioned areas are the station hall floor, platform floor, and equipment rooms. The characteristic of air-conditioning is that it provides cooling in summer and no heating in winter. Moreover, ventilation and air conditioning mostly use all-air systems, which take up a lot of space. The layout of chillers, especially cooling towers, is more difficult due to urban planning.

Considering the above factors and the experience of subway construction, the author puts forward the following three ideas: