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| 主动式冷梁性能对房间气流组织影响模拟研究 |
| Simulation study on the influence of active chilled beam performance on air distribution in a chamber |
| 投稿时间：2023-03-14 |
| DOI：10.13259/j.cnki.eri.2023.02.001 |
| 中文关键词: 主动式冷梁 性能 气流组织 模拟分析 |
| 英文关键词:active chilled beam performance airflow simulation analysis |
| 基金项目: |
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| 摘要点击次数: 1495 |
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| 中文摘要: |
| 以某主动式冷梁送风房间为模型，利用计算流体力学（CFD）软件模拟了主动式冷梁性能对房间气流组织的影响，并将模拟值和实测值进行了对比，验证了模型的准确性。利用该模型研究了主动式冷梁出风速度、出风温度、出风角度、出风高度以及回风口位置对房间气流组织的影响。结果表明：若仅改变出风速度，当出风速度从1 m·s−1增大到4 m·s−1时，预期平均通感PM下降，不适人员比例PD先降后升，出风速度为2 m·s−1时，PD最小，为9%，此时人员对环境的满意度最高；若仅改变出风角度，当出风角度为45°时房间气流组织分布最佳；若仅改变出风高度，当出风高度为2.33 m时房间气流组织分布最佳。在出风温度为20 °C、出风速度为4 m·s−1时，比较不同回风口位置（上部、中部、底部）时距离地面高度Y=1.2 m截面的气流组织变化，发现回风口位于底部时该截面温度最高，空气速度最小，空气龄最大，PD最小，为28%，此时人体冷热感觉较舒适。 |
| 英文摘要: |
| A chamber with active chilled beam air supply was used as a model to study the influence of active chilled beam on indoor air distribution by computational fluid dynamics (CFD) software. The model was verified with the experimental data and further used to investigate the effect of the air-out velocity, temperature, angle, height of the active chilled beam and the location of return air on the air distribution in this chamber. When the air-out speed changes from 1 m·s−1 to 4 m·s−1, the predicted mean vote PM decreases, and the predicted percentage of dissatisfied PD decreases firstly and then increases. At 2 m·s−1, the minimum PD of 9% is achieved with the highest environment satisfaction. The best air distribution in the chamber is obtained at the air-out angle of 45° and at the beam installation height of 2.33 m, respectively. The influence of return air such as the upper, middle, and bottom on the air distribution in this chamber was compared at the air supply temperature of 20 ℃ and wind speed of 4 m·s−1. The highest temperature at the cross section of Y=1.2 m is achieved for the bottom return air, accompanying by the smallest air velocity and the largest air age. The cold and heat feeling of human body is relatively comfortable with the lowest PD of 28%. |
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