Facility for aerosol monitoring instruments (ManDust): design and fabrication of a versatile diffuser tower with isokinetic sampling probes

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2022-11-25 DOI:10.1080/10739149.2022.2149552

Giang Hoang Nguyen, Hanh Phan, Thang Toan Vu, Hoa Thi Hien Tran, Tung Son Tran, Trung Quang Nguyen, Nam Thanh Duong

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Abstract

Abstract There is a growing demand for a flexible, precise calibration facility for aerosol monitoring instruments. This study investigated ManDust1, an aerosol calibration facility that is compatible with a variety of different operating principles. The facility comprises four systems: (a) a clean air supply system, (b) an aerosol generator system, (c) a diffuser tower, and (d) a sampling system. A compact and modular diffuser tower provides turbulence flow to homogeneously mix the injected aerosol before collection by custom-made isokinetic sampling probes. The velocity profile in the diffuser tower was computed and measured to be turbulent, generating a well-mix aerosol condition with spatial homogeneity of 4.38% across all sampling locations. A computational fluid dynamics (CFD) simulation conducted to confirm the dimension of the facilty was able to generate turbulence flow and mixing. The facility stably provided aerosols from 0 to 10 µm with variable concentrations from a few µg/m3 to 1000 µg/m3. The uncertainty budget in this study was calculated to be 5.98% when the facility was operated at 600 µg/m3 (95% confident level), and span drift was calculated to be 3.15% after 120 h of measurement.

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气溶胶监测仪器设施（ManDust）：带等速采样探头的多功能扩散塔的设计和制造

摘要对气溶胶监测仪器的灵活、精确校准设备的需求越来越大。这项研究调查了ManDust1，一种与各种不同操作原理兼容的气溶胶校准设备。该设施包括四个系统：（a）清洁空气供应系统，（b）气溶胶发生器系统，（c）扩散塔，和（d）采样系统。一个紧凑的模块化扩散器塔提供湍流，在通过定制的等速采样探针收集之前，将注入的气溶胶均匀混合。扩散塔中的速度剖面被计算和测量为湍流，在所有采样位置产生了空间均匀性为4.38%的良好混合气溶胶条件。进行计算流体动力学（CFD）模拟以确认设施的尺寸，能够产生湍流和混合。该设施稳定地提供0至10个气溶胶 µm，浓度从几µg/m3到1000不等 µg/m3。本研究中的不确定性预算计算为，当设施在600℃下运行时，不确定性预算为5.98% µg/m3（95%置信水平），120之后计算出跨度漂移为3.15% h。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.