Abstract

Air conditioning is of the most energy saving potential system in the metro station. This study analyzes the composition and characteristics of air conditioning cooling load in a metro station. The hourly distribution and the proportion of each cooling load are calculated. The results show that cooling load fluctuation of metro air conditioning is large, and the operating time of different load varies greatly. According to the air conditioning cooling load, the coefficient of performance of the fixed frequency screw, variable frequency screw, series countercurrent screw and magnetic bearing centrifugal chiller under the load of 20–100% are tested. The annual operating cost of four chillers is compared. Test results show that the magnetic bearing centrifugal chiller has a much higher coefficient of performance at part load and lower annual operating cost. Increased initial investment can be recovered in less than 2 years. The magnetic bearing centrifugal chiller is suitable as a cold source of air conditioning system in the metro station.

中文翻译：

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地铁车站冷负荷与冷水机组选择研究

摘要

空调是地铁站中最具节能潜力的系统。本研究分析了地铁车站空调制冷负荷的组成和特点。计算每小时分布和每个冷却负荷的比例。结果表明，地铁空调的制冷负荷波动较大，不同负荷的运行时间差异较大。根据空调的冷却负荷，测试了20-100％负荷下的定频螺杆，变频螺杆，串联逆流螺杆和电磁轴承离心式冷水机组的性能系数。比较了四个冷却器的年运行成本。测试结果表明，磁轴承离心式制冷机在部分负荷下具有更高的性能系数，并且年度运营成本更低。增加的初始投资可以在不到2年的时间内收回。磁性轴承离心式冷水机适合作为地铁站中空调系统的冷源。