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DOI	10.1016/j.atmosenv.2020.117455
	Computational fluid dynamics prediction of formaldehyde emission and sorption processes in a small test chamber with mixing fan and vents
	Mu Y.-T.; Li Z.-A.; Gu Z.-L.; Tao W.-Q.
发表日期	2020
ISSN	1352-2310
卷号	229
英文摘要	Characterizing the emission performance of formaldehyde is critical for control strategies. Most previous emission models assume that formaldehyde concentrations are well-mixed. In this study, a computational fluid dynamics-based model is developed for simulating the mass transfer and adsorption/desorption processes of formaldehyde from particleboards in a chamber with a mixing fan. Numerical investigations on the impacts of the mixing fan, adsorption/desorption rate constants, and key transport parameters influencing the emission behaviors are conducted for the first time. The results show that the complete mixing assumption is not appropriate in the early emission period. Incomplete mixing becomes more significant with a decreasing rotation speed, leading to a time-dependent equivalent mass transfer coefficient. The deviation in the maximum concentration between the simulated curves with and without the adsorption/desorption effect is approximately 8.5%. A coefficient of mixing of 0.0283 is suitable for evaluating complete mixing in the chamber. With an increase in the rotation speed, the degree of mixing improves, and the mass transfer coefficient increases sub-linearly. Secondary reemission becomes more significant and begins earlier for materials with lower partition coefficients and higher diffusivity. © 2020 Elsevier Ltd
关键词	Coefficient of mixing Emission behavior Formaldehyde Mixing fan Numerical simulation VOC
语种	英语
scopus关键词	Adsorption; Computational fluid dynamics; Formaldehyde; Mass transfer; Rate constants; Rotation; Adsorption/desorption; Adsorption/desorption rate; Emission performance; Formaldehyde concentrations; Formaldehyde emission; Maximum concentrations; Numerical investigations; Partition coefficient; Mixing; formaldehyde; computational fluid dynamics; concentration (composition); detection method; emission; prediction; sorption; testing method; adsorption; air conditioning; air pollution; airflow; Article; comparative study; computational fluid dynamics; desorption; diffusion flux; fluid flow; maximum concentration; molecular diffusivity; partition coefficient; physical model; prediction; priority journal; rotation; simulation
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/249215
作者单位	School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710054, China; School of Civil Engineering, Chang'an University, Xi'an, Shaanxi 710061, China; Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
推荐引用方式 GB/T 7714	Mu Y.-T.,Li Z.-A.,Gu Z.-L.,et al. Computational fluid dynamics prediction of formaldehyde emission and sorption processes in a small test chamber with mixing fan and vents[J],2020,229.
APA	Mu Y.-T.,Li Z.-A.,Gu Z.-L.,&Tao W.-Q..(2020).Computational fluid dynamics prediction of formaldehyde emission and sorption processes in a small test chamber with mixing fan and vents.ATMOSPHERIC ENVIRONMENT,229.
MLA	Mu Y.-T.,et al."Computational fluid dynamics prediction of formaldehyde emission and sorption processes in a small test chamber with mixing fan and vents".ATMOSPHERIC ENVIRONMENT 229(2020).