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

IF 1.3 4区工程技术 Q4 CHEMISTRY, ANALYTICAL

Instrumentation Science & Technology 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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引用次数: 0

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。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Instrumentation Science & Technology 工程技术-分析化学

CiteScore

3.50

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Instrumentation Science & Technology is an internationally acclaimed forum for fast publication of critical, peer reviewed manuscripts dealing with innovative instrument design and applications in chemistry, physics biotechnology and environmental science. Particular attention is given to state-of-the-art developments and their rapid communication to the scientific community. Emphasis is on modern instrumental concepts, though not exclusively, including detectors, sensors, data acquisition and processing, instrument control, chromatography, electrochemistry, spectroscopy of all types, electrophoresis, radiometry, relaxation methods, thermal analysis, physical property measurements, surface physics, membrane technology, microcomputer design, chip-based processes, and more. Readership includes everyone who uses instrumental techniques to conduct their research and development. They are chemists (organic, inorganic, physical, analytical, nuclear, quality control) biochemists, biotechnologists, engineers, and physicists in all of the instrumental disciplines mentioned above, in both the laboratory and chemical production environments. The journal is an important resource of instrument design and applications data.