不同送风方式对冷板系统中室内空气品质的影响

采用计算流体力学(CFD)方法,模拟了在冷却顶板 置换通风联合空调系统(CC/DV)以及冷却顶板 混合风联合系统(CC/MV)两个模型中室内的空气温度、速度和粒子的分布情况。通过对模拟结果进行讨论,分析了粒子分布特征,结果表明:混合通风比置换通风能更有效的排除地面产生的扬尘,大颗粒污染物在置换通风气流场中比小颗粒污染物容易沉积,而在混合通风气流场中大小颗粒的分布区别不大。

Comparison of Different Types of Ventilation in Combined System of Chilled Ceiling to Investigate the Effect of Indoor Air Quality

This paper uses a Computational Fluid Dynamics (CFD) model to simulate the indoor airflow pattern, temperature and particle concentration distributions between mixing and displacement ventilation in combined system of chilled ceiling. The results of an investigation simulation the distribution of particle in the two different types of ventilation indicate that a combination of a cooled ceiling with mixing ventilation system has a strong impact on removal the passive contaminants from floor. The larger particle deposition in displacement airflow pattern has more effect, and there is little difference of distribution between large and small particle in mixing ventilation airflow pattern.