基于计算流体力学的高大空间温湿度控制模型的建立

Modeling of temperature and humidity control in high and large space based on computational fluid dynamics

为解决高大空间温湿度均衡性精准控制问题,以卷烟厂贮丝房为研究对象,基于计算流体力学(Computational fluid dynamics,CFD)方法建立了高大空间温湿度控制模型,通过模型研究了组合式空调机组变风量和定风量运行时,多入风口多回风口的高大空间内气流组织与温湿度均衡性的关系,并对模型的时间参数进行了优化。通过试验验证了空调机组制冷和制热工况下模型的控制精度,结果表明:模型预测值与实测值吻合良好,误差在0.1℃以下,达到精准控制的要求。该控制模型的建立为高大空间温湿度均衡性的精准控制提供了技术支撑。

In order to precisely control the evenness of temperature and humidity distribution in high and large space, a control model was developed based on computational fluid dynamics （CFD） by taking the cut tobacco store room in a cigarette factory as a research object. The relationships of airflow with temperature and humidity in a high and large room with multiple air inlets and air outlets were studied when the air conditioning system was running at constant and variable air volume conditions. Meantime, the time parameter in the model was optimized. The control precision of the said model when the air conditioning system working under cooling and heating status was verified by tests. The results showed that the values predicted by the model well agreed with the measured values with the error below 0.1 ℃, which met the requirements of precise control. The control model provides a technical support for the precise control of temperature and humidity in high and large space.