Development of a fog droplet sampler with multi-segment structure and specific temperature control

IF 1.3 4区 工程技术 Q4 CHEMISTRY, ANALYTICAL Instrumentation Science & Technology Pub Date : 2023-10-23 DOI:10.1080/10739149.2023.2271564
Liansi Sun, Yin Cheng, Jiaoshi Zhang, Dexia Wu, Jie Wang, Yixin Yang, Huaqiao Gui
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Abstract

AbstractAccurate and efficient sampling of fog droplets is a prerequisite for online measurement. The performance of such a sampler relies on the internal flow field, temperature, and humidity. Based on aerodynamics and turbulence theory, we designed a fog droplet sampler with multi-segment structure and specific temperature control. First, we used COMSOL to investigate the effects of key system parameters. The sampling efficiency first increased and then decreased with sampling flow. The reason was that the impact force under reasonable flows maintained particles in suspension, whereas high flows with high turbulence intensity increased the likelihood of particles colliding with the walls. Based on the simulations, we determined the optimal sampling flow (1000 L/min), segment structure (a cylindrical inlet), and segment dimension (25 mm for the optical measurement segment) of the sampler, with a sampling efficiency of 0.87. Subsequently, we investigated the effects of temperature, relative humidity, and sampling flow on the particle size. Size change increased with temperature but decreased with relative humidity and sampling flow. Additionally, temperature control contributed to condensation prevention, and size change was < 1% when the temperature was 15 °C. Finally, we conducted an experiment for verification purposes. The sampling efficiency of the fabricated system was 0.77, i.e., 11.49% lower than for the simulation. Size change was < 1 μm in both the simulations and the experiments, while variation was 6.30% in the experiment, i.e., a difference of 3.97% from the simulation. Hence, the designed fog droplet sampler achieved accurate and efficient sampling of fog droplets.Keywords: Fog droplet samplersampling efficiencyenvironmental conditionstemperature controlsimulation analysis AcknowledgmentsWe thank James Buxton MSc, from Liwen Bianji (Edanz) (www.liwenbianji.cn/), for editing the English text of a draft of this manuscript.Disclosure statementNo potential conflicts of interest are reported by the authors.Additional informationFundingThis research was supported by the National Natural Science Foundation of China (No. 41905028, 91544218), the Comprehensive Science Center Project of Hefei (No. E03H0K11), the Hefei Municipal Natural Science Foundation (Grant No. 2021007), the Key Research and Development Program of Anhui Province (No. 202004a07020048), and the HFIPS Director’s Fund (No. BJPY2021A04).
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具有多段结构和特定温度控制的雾滴取样器的研制
摘要准确、高效的雾滴采样是实现在线测量的前提。这种采样器的性能取决于内部流场、温度和湿度。基于空气动力学和湍流理论,设计了一种具有多段结构和特定温度控制的雾滴采样器。首先,我们使用COMSOL来研究关键系统参数的影响。采样效率随采样流量的增大先增大后减小。其原因是,合理流量下的冲击力使颗粒保持悬浮状态,而湍流强度大的大流量增加了颗粒与壁面碰撞的可能性。在此基础上,我们确定了采样器的最佳采样流量(1000 L/min)、分段结构(圆柱形进口)和分段尺寸(光学测量段为25 mm),采样效率为0.87。随后,我们研究了温度、相对湿度和取样流量对颗粒大小的影响。粒径变化随温度的升高而增大,随相对湿度和取样流量的增大而减小。此外,温度控制有助于防止结露,当温度为15℃时,尺寸变化< 1%。最后,我们进行了一个实验来验证。制备系统的采样效率为0.77,比模拟系统低11.49%。模拟结果与实验结果的尺寸变化均< 1 μm,而实验结果的变化幅度为6.30%,与模拟结果相差3.97%。因此,所设计的雾滴采样器实现了雾滴的准确、高效采样。关键字:雾滴采样器采样效率环境条件温度控制模拟分析致谢感谢Liwen Bianji (Edanz) (www.liwenbianji.cn/)的James Buxton MSc编辑了本文草稿的英文文本。披露声明作者未报告潜在的利益冲突。项目资助:国家自然科学基金项目(No. 41905028,91544218);合肥市综合科学中心项目(No. 91544218);合肥市自然科学基金(项目编号:2021007),安徽省重点研发计划项目(项目编号:202004a07020048),合肥国际科学院院长基金项目(项目编号:003h0k11);BJPY2021A04)。
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
Instrumentation Science & Technology 工程技术-分析化学
CiteScore
3.50
自引率
0.00%
发文量
45
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.
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