纺纱车间空调系统数学建模及动态仿真

Mathematical modeling and dynamic simulation of air conditioning system in spinning workshop

为研究纺纱车间温湿度动态变化规律,并为空调系统自控策略提供运行平台,基于热量平衡、湿量平衡和风量平衡分别建立了喷水室、纺纱车间模型;利用Python实现业务逻辑编程,利用PyQt5开发图形用户界面,建立变露点新风控制策略,基于比例积分微分(PID)算法程序实现车间温湿度的自动控制,并开发纺纱车间空调系统动态仿真平台。以某纺纱厂车间结构参数、工艺及空调设备参数为仿真平台基础数据和边界条件,对改变空调设备控制参数后车间温湿度变化进行了仿真计算。结果表明,基于纺纱车间空调系统仿真平台能计算喷水室机器露点、车间温湿度的动态变化值及稳定到车间设定温湿度时的响应时间,可对空调设备进行自动调节控制。开发的纺纱车间空调系统仿真平台具备了纺纱车间虚拟运行环境,可在此基础上进行空调系统控制策略的相关研究。

In order to study the dynamic change of temperature and humidity in spinning workshop and provide operation platform for the automatic control strategy of air conditioning system,the models of spray chamber and spinning workshop were established respectively on the basis of heat,moisture and air-volume balance.The dynamic simulation platform of spinning air conditioning system was developed by Python and PyQt5 which support business logic programming with developed graphical user interface.The fresh air control strategy of dew point was established,and the automatic control of the temperature and humidity in the workshop was achieved based on the proportional integral derivative(PID)control algorithm.Taking the structure,process and air conditioning equipment of a spinning workshop as the basic parameters and boundary conditions of the simulation platform,the temperature and humidity changes in the workshop after changing the control parameters of air conditioning equipment were simulated.The results show that the simulation platform of air conditioning system of the spinning workshop is useful to adjust and control the air conditioning equipment.It can calculate the machine dew point of spray chamber,the changing value of the temperature and humidity,and the response time when the temperature and humidity are stable to the set temperature and humidity for the workshop.The simulation platform of spinning air-conditioning system has the virtual operation environment of a spinning workshop,which can be used to study the control strategy of the air-conditioning system.