基于最小水流量的地铁车站空调系统节能控制研究

Research on energy-saving control for air-conditioning system of metro station based on minimum water flow

地铁车站空调系统运行能耗大,在温差控制等常用控制策略下易出现末端冷量不足的问题。针对该问题,提出了一种基于最小水流量的空调系统控制策略,并以郑州市一地铁车站空调系统为例,利用TRNSYS仿真的方法对该运行策略进行研究。首先搭建该车站建筑围护结构模型;其次搭建工频运行的空调系统模型,作为节能分析的基础模型;最后对基于最小水流量的空调系统的控制策略以及节能效果进行分析。结果表明:基于最小水流量的控制策略相比较工频运行控制策略空调系统节能率为53.1%,室内温度控制精度在±0.5℃范围以内,有效解决了定温差控制策略下末端冷量不足的问题,具有重要的工程应用价值。

The operation energy consumption of the air conditioning system in metro station is huge.And common control strategies,such as temperature difference control,usually result in insufficient refrigerating capacity of air conditioning terminals.To cope with his problem,a control strategy of air-conditioning system based on the minimum water flow is presented.A case study of the air-conditioning system of a metro station in Zhengzhou is carried out to study the operation strategy by TRNSYS simulation method.Firstly,the building envelope model of the station is built.And then the model of the air-conditioning system operating at working frequency is built as the basic model for energy-saving analysis.Finally,the control strategy and energy-saving effects of the air-conditioning system based on the minimum water flow are analyzed.The results show that the energy saving rate of the air-conditioning system based on the minimum water flow control strategy is 53.1%and the indoor temperature control accuracy is within the range of±0.5℃.The control strategy based on minimum water flow effectively solves the problem of insufficient refrigerating capacity of air conditioning terminal,which provide suggestions for future engineering application.