轨道交通车站空调水系统新型节能控制方法研究

Research on New Energy-Saving Control Method of Air Conditioning Water System in Rail Transit station

面对轨道交通能耗逐年递增的现状,我国大力提倡轨道交通节能,并提出绿色轨道交通的概念;针对传统轨道交通空调系统所存在的冷水机组制冷量过剩、冷冻和冷却水流量无法自动调节等问题,设计一种新型节能控制系统,对车站冷负荷变化规律进行分析,对系统进行集中监控;利用变频技术和闭环控制系统,计算所需冷负荷,智能控制电机转速,自动调节冷水机组的制冷量与空调末端冷量,使冷却系统处于最节能的工作点;轨道交通空调水系统应用该节能系统后耗电量大幅度降低,从而节约大量能源。

Energy consumption of Rail transit in our country is increasing year by year, thus the state vigorously promotes energy conservation and puts forward the concept of green rail transit. Since traditional air conditioning system of rail transit cannot adjust the water flow of cooling and refrigeration automatically under the dynamic work environment, and chillers cooling capacity surplus and other issues have not yet been solved, a new energy--saving control system has been researched in this paper. By analyzing the change law of cooling load of the station, this paper proposes centralized monitoring system, frequency conversion technology and the closed--loop control system so as to calculate the cooling load, achieve the control of motor speed intelligently as well as automatically adjust the volume of the refrigerating capacity of the chiller and air--conditioning terminal. Thus the cooling system can always working in the energy saving point. Since the energy --saving system is practiced in rail transit air--conditioning water system, power consumption has been considerably reduced and enormous energy conserved.