globalchange  > 气候变化与战略
DOI: 10.1016/j.atmosenv.2020.117419
论文题名:
An improved displacement ventilation system for a machining plant
作者: Wei G.; Chen B.; Lai D.; Chen Q.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 228
语种: 英语
英文关键词: Air ; Air quality ; Computational fluid dynamics ; Health risks ; Indoor air pollution ; Thermal comfort ; CFD simulations ; Contaminant concentrations ; Displacement ventilation system ; Indoor air quality ; Indoor environment ; Metalworking Fluids ; Pollutant sources ; Ventilation systems ; Ventilation ; air quality ; air temperature ; airflow ; atmospheric pollution ; computational fluid dynamics ; experimental study ; indoor air ; oil pollution ; vaporization ; ventilation ; air conditioning ; air pollution ; air quality ; air temperature ; airflow ; ambient air ; Article ; comparative study ; computational fluid dynamics ; concentration (parameter) ; energy balance ; environmental temperature ; heat ; industry ; machining plant ; plume ; priority journal ; surface property ; winter
学科: CFD simulation ; Experimental measurements ; Indoor air quality ; Thermal comfort
中文摘要: Machining plants are often highly polluted indoor environments with dense oil mist generated from metalworking fluids. Workers exposed to oil mist may suffer serious health problems. General ventilation is often used to dilute the oil mist level below the threshold of health risk. However, it is not easy to organize the flow for ventilating a large machining plant with hundreds of machines in order to effectively remove the oil mist. In order to develop an effective ventilation system, this study validated a computational fluid dynamics (CFD) program with the RNG k-ε model at a high Grashof number by using the measured air temperature and contaminant concentration in several locations in a high-ceiling lab with heat and pollutant sources. Next, the validated CFD program was used to develop an improved displacement ventilation system in which air is supplied from the lower parts of the support columns in the plant. With thermal plumes generated by machines and workers, the system formed unidirectional airflow that carried pollutants away from the work area of the factory. The system reduced the oil-mist concentration by more than 70% compared with existing ventilation system. In addition, suspended radiant heaters are recommended for supplemental heating in winter. © 2020 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160399
Appears in Collections:气候变化与战略

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作者单位: School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China; Department of Architecture, Shanghai Jiao Tong University, Shanghai, 200240, China; School of Mechanical Engineering, Purdue University, West Lafayette, IN 47905, United States

Recommended Citation:
Wei G.,Chen B.,Lai D.,et al. An improved displacement ventilation system for a machining plant[J]. Atmospheric Environment,2020-01-01,228
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