The Measurement and Analysis of Microphysical Capabilities of the Condensation Nucleus of Artificial Warm Fog

2017 International Conference on Environmental and Energy Engineering

生态环境科学;能源学

Dai, Meng-Yan^1 ; Chen, Chun-Sheng^1 ; Liu, Jiang-Hai^1 ; Zhang, Liang^1 ; He, Hai-Yan^1

State Key Laboratoty of NBC Protection for Cilivian, Research Institute of Chemical Defence, Beijing

102205, China^1

关键词: Catalytic performance;    Chemical compositions;    Condensation nuclei;    Growing velocity;    Measurement and analysis;    Nucleation efficiency;    Number concentration;    Volume concentration;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/63/1/012015/pdf
DOI  :  10.1088/1755-1315/63/1/012015

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this paper, the microcosmic capabilities of the condensation nucleus and fog droplets of artificial fog were observed and sampled by ELPI, SEM, XRD and LPSA. The chemical composition, number concentration, volume concentration and nucleation efficiency of the artificial condensation nucleus were gained. The condensation nucleus was mainly made up of chloride. The size distribution scope was about 0.291 ∼ 1.59μm and the peak particle size was 0.609∼0.942μm. The number concentration of the condensation nuclei was 3.98×105∼4.82×105/cm3, the volume concentration was 2.02×105∼2.30×105μm3/cm3, and the maximum nucleation efficiency was 3.07×1012/g. Actually, most condensation nuclei did not participate in the actual fog performing process, and the nucleation activation proportion was 13.57%. The condensation nucleus played an important role in the microphysical performance of fog droplets. However, the growing velocity of fog droplets was not identical as the catalytic performance difference of nuclei and the uneven distribution of watervapor in air. That was the reason why the fog droplets size distribution behaved the characteristic of bi-spectrum converting into uni-spectrum gradually.