| 摘要: |
| 本文采用计算流体动力学（CFD）方法模拟某机械加工车间三种类置换通风系统（中横向送上回、下横向送上回、下竖向送上回）对细颗粒物（PM2.5）的移除能力。现场实测验证了模拟准确性。结果表明：三种类置换通风系统会形成污染物分层现象，车间下部工人呼吸区的污染物质量浓度低于车间上部的污染物质量浓度；通过降低排风口高度可以使车间人员活动区污染物降低26.3%~70%；下竖向送上回的通风形式对细颗粒物控制效果更好，排污效率更高且不易造成吹风感，更适用于工业厂房的通风。 |
| 关键词: 工业厂房 类置换通风 污染物分层 排污效率 |
| DOI： |
| 投稿时间：2021-04-07 修订日期：2021-06-11
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| 基金项目:国家自然科学基金(51505480, 51875345);江苏省自然科学基金（BK20150197）资助。 |
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| Ventilation Performance of Three Displacement-like Ventilation System in a Machining Workshop |
| Cao Jin,Miao Jianhui,Ma Jianchao,He Ping |
| (Shanghai Highly Group Co., Ltd.;Anhui Highly Precision Casting Co., Ltd.;School of Energy and Environment, Southeast University) |
| Abstract: |
| The computational fluid dynamics (CFD) method is used to simulate the removal of fine particulate matter (PM2.5) by three displacement-like ventilation systems (horizontal supply air from the middle of the workshop and exhaust air from the upper part, horizontal supply air from the lower part of the workshop and exhaust air from the upper part, downward supply air from the lower part of the workshop and exhaust air from the upper part). Field measurements verify the accuracy of the simulation. The results show that the three displacement-like ventilation systems form pollutant stratification in the workshop, and the concentration of pollutants in the lower part is lower than that in the upper part of the workshop. Pollutants in the personnel activity area of the workshop can be reduced by 26.3%–70% by decreasing the height of the exhaust outlet. Compared with the other two ventilation systems, system 3 does not cause drafts, and it exhibits a high contaminant-removal effectiveness, which is more suitable for ventilation in industrial plants. |
| Key words: Industrial plant displacement-like ventilation pollutant stratification contaminant removal effectiveness |
