globalchange  > 气候变化与战略
DOI: 10.1016/j.atmosenv.2020.117455
论文题名:
Computational fluid dynamics prediction of formaldehyde emission and sorption processes in a small test chamber with mixing fan and vents
作者: Mu Y.-T.; Li Z.-A.; Gu Z.-L.; Tao W.-Q.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 229
语种: 英语
英文关键词: 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
学科: Coefficient of mixing ; Emission behavior ; Formaldehyde ; Mixing fan ; Numerical simulation ; VOC
中文摘要: 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
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160386
Appears in Collections:气候变化与战略

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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

Recommended Citation:
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]. Atmospheric Environment,2020-01-01,229
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