卷烟材料暂存高架库温湿度场的优化控制研究

Optimization of Temperature and Humidity Fields Control in High-by Depot for Cigarette Materials

卷烟材料暂存高架库内的空调系统实际运行效果不理想,室内空气温湿度达不到工艺要求,对暂存材料质量造成不利影响。为此,对高架库的空调系统进行了改造,并对改造后空调系统的运行效果进行了测试和分析。改造后高架库空调系统增加了两台空调机组负责新回风的混合与送风,气流组织方式由原来的侧送、侧回改为顶部送风、底部回风。空调系统改造后各平面温湿度分布表明,水平方向温湿度场的均匀性提高;垂直方向的温度场存在分层现象,但温湿度场基本分布在要求范围内。利用CFD软件对高架立体仓库构建了物理数学模型,对不同风量、送风参数条件下仓库内的温湿度场进行了模拟研究,结果显示:①对于需要保持均匀温湿度场的高架立体库,带有静压箱和送风孔板的上送下回气流组织方式是可行的;②对于该高架库的夏季工况,送风量的变化对库内温度场的影响较小,送风温差的改变则对库内温度场影响较大。因此,通过调节送风风量和送风温度,可保持卷烟材料高架库内温湿度的恒定与均匀性。

The performance of the air conditioning system in the high-bay depot for cigarette materials was not satisfactory, the temperature and humidity distribution in the depot was not up to the technological requirement, which adversely affected the stored materials. Therefore, the system was improved. Two air condition- ing units were added responsible for mixing fresh air and circulated air and air supply. The pattern of indoor air flow was rearranged from side-in and side-out to top-in and bottom-out. After improving, the temperature and humidity was more evenly distributed horizontally, although the vertical temperature distribution was not as even, it was in the acceptable range. The mathematical model was built with CFD software, and the tempera- ture and humidity fields in the depot were simulated and studied under different input air volumes and parame- ters, the results showed that： 1 ） for the depot in which uniform temperature and humidity fields were required, the air flow pattern of top-in and bottom-out associated with static-pressure chamber and perforated air-supply board was feasible; 2） in summer, the change of air volume had less effect on the temperature field, which was more affected by the change of temperature difference of input air. The constant and uniform temperature and humidity in the depot can be maintained by adjusting input air volume and temperature.