摘要
根据会议室内CO2浓度的动态特性,分别采用定风量、常规PID控制和模糊PI控制等三种方法,对会议室内进行新风控制系统仿真研究。仿真结果表明:CAV空调系统不随室内CO2浓度变化而实时改变新风量,不利于在控制室内空气品质的前提下节省新风能耗;PID控制能消除稳态误差,但超调大,过渡时间长,在工况变化较小的情况下,能满足一定的控制要求;对于对象延迟、工况变化较大的场合,模糊PI控制方法能够很好地跟踪室内CO2浓度,合理地控制新风量,提高室内空气品质,综合控制效果比CAV空调系统和PID都好。
According to the CO2 concentration dynamic characteristics in a council-chamber, a simulation model was built to study the outdoor air rates control system in the Toom by Constant Air Volume （CAV）, PID control and fuzzy-PI control method. It is shown that CAV air-conditioning system wastes energy during periods of low occupancy. PID control algorithm can eliminate steady-state error, but the overtune is big and transitional time is long. PID algorithm only suits for small variation of CO2 concentration condition. Under the condition with big variation, fuzzy-PID algorithm can trace the CO2 concentration, and control the outdoor airflow reasonably. The air-conditioning system employed fuzzy -PID algorithm can obtain most control performance among the methods.
出处
《建筑热能通风空调》
2009年第2期80-82,103,共4页
Building Energy & Environment
基金
河南省科技攻关项目(No:072102360051)
关键词
CO2浓度
新风量
仿真
模糊PI控制
CO2 concentration, outdoor air rate, simulation, fttzzy-PI control
