Economic analysis of staged configuration and implementation scheme of air conditioning system in subway station

The scheme of short-term and long-term equipment staged configuration and implementation can be adopted in the air conditioning system of subway station, but it is necessary to consider the influence of the years when the air conditioning load is higher than the short-term load, and quantitatively analyse the economy of the staged configuration and implementation scheme from the perspective of the whole life cycle. Through modeling and calculation, this study compares the whole life cycle costs between the staged configuration and implementation scheme and the traditional scheme of the air conditioning system in the subway station. The results show that for typical stations in hot summer and warm winter zone, as long as the long-term arrival time exceeds 8 years, the economy of the staged configuration and implementation scheme is better. When the long-term arrival time exceeds 16 years, the total cost of the staged configuration and implementation scheme is 4.179 million yuan, which is 1.159 million yuan less than that of the traditional scheme, and the saving ratio is 21.7%.