摘要
本文根据某实际空调系统的控制与运行现状,实施了节能控制改造。提出了一次泵变流量系统采用检测流量进行最小流量旁通控制的方法,并在该项目中实施应用。在改造完成后,通过系统调试及阶跃测试获得了最小流量旁通的相关控制参数,并对系统实施实际控制。本文给出了最小流量旁通控制在满负荷日和部分负荷日的控制效果。结果表明,最小流量旁通控制可以直接以系统流量作为控制参数对旁通阀门进行调节,控制稳定可靠。在不同负荷日,无论是系统末端部分支路关闭还是在系统所需流量较小时,最小流量旁通控制器都能迅速动作,调节旁通阀门的开度,维持系统流量在最小流量设定值,对系统流量能做到准确控制。在一次泵变流量系统中设置流量传感器并采用该测量值进行最小流量旁通控制是一种简单可行的旁通控制方法。
Based on the actual control and operation situation of an air conditioning system,an upgrading energysaving control strategy was implemented in this system.A minimum flow bypass-control method by using measured flowrate is proposed for primary-pumping variable water system.After the retrofitting and upgrading,the control parameters for the minimum flow bypass-control were obtained through commissioning and step response tests. These parameters are used for the actual control.This paper further presents the control effects of this method in a typical full load day and a typical partial load day.The results show that the minimum flow bypass control can control the bypass valve well by using the system flow as the control value.This control is stable and reliable.In different load days,the minimum flow bypass controller can response and regulate the opening of the bypass valve quickly to maintain the system flowrate at the setting value well no matter if many branches of this system are closed or the required flow is very small.The minimum flow bypass-control method by using a flow meter is simple and feasible.
作者
刘庆东
车轮飞
万航
刘俊
徐新华
LIU Qingdong;CHE Lunfei;WAN Hang;LIU Jun;XU Xinhua(School of Environment Science &Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;China Railway Siyuan Survey and Design Group Co.,Ltd.,Hubei,Wuhan 430063)
出处
《建筑科学》
CSCD
北大核心
2018年第12期65-69,75,共6页
Building Science
基金
国家自然科学基金资助项目"自力式能量迁移的套管封装相变墙体系统主动隔热机制研究"(51678263)
关键词
一次泵变流量系统
水泵变频控制
最小流量旁通控制
节能优化控制
参数调试
primary-pumping variable water system
pump frequency control
minimum flow bypass control
energy-saving optimization control
parameter tuning
