Abstract：Research purposes:The number of subway station in construction or planning was huge in china, the quantity of makeup water for air conditioning recirculating cooling water in station which equipped with air conditioning was large，resulted in high operating costs and going against the economical use of water resources. And reclaimed water system of our city was developing gradually. Therefore，it was with great economic and social significance of feasibility research on using reclaimed water as makeup water for air conditioning recirculating cooling water in subway. The quality of air conditioning recirculating cooling water and the quality of city reclaimed water were analyzed and compared， deeper treatment program for reclaimed water was made，the technical and economic comparison of using reclaimed water and city water as air conditioning recirculating cooling water was made.
Research conclusions:(1)Using reclaimed water as air conditioning recirculating cooling water in subway is feasible， through pertinently advanced treatment，reclaimed water could be used as cooling water.(2)Although the initial investment of economic increases，but the operating cost is reduced.(3)On the whole，replenishment amount is bigger, the economic benefit is more.(4)The research provides a new idea for the choice of makeup water for air conditioning recirculating cooling water and the using mode of reclaimed water, which has a certain guiding significance to specific implementation.
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2014, Vol. 31 
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