气候变化领域集成服务门户(CCPortal): An improved displacement ventilation system for a machining plant

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DOI	10.1016/j.atmosenv.2020.117419
	An improved displacement ventilation system for a machining plant
	Wei G.; Chen B.; Lai D.; Chen Q.
发表日期	2020
ISSN	1352-2310
卷号	228
英文摘要	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
关键词	CFD simulation Experimental measurements Indoor air quality Thermal comfort
语种	英语
scopus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
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/249228
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
推荐引用方式 GB/T 7714	Wei G.,Chen B.,Lai D.,et al. An improved displacement ventilation system for a machining plant[J],2020,228.
APA	Wei G.,Chen B.,Lai D.,&Chen Q..(2020).An improved displacement ventilation system for a machining plant.ATMOSPHERIC ENVIRONMENT,228.
MLA	Wei G.,et al."An improved displacement ventilation system for a machining plant".ATMOSPHERIC ENVIRONMENT 228(2020).