Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2018.04.004 |
Collection efficiency of fog events | |
Montecinos, Sonia1,2; Carvajal, Danilo3,4; Cereceda, Pilar5; Concha, Miguel1 | |
2018-09-01 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2018 |
卷号 | 209页码:163-169 |
文章类型 | Article |
语种 | 英语 |
国家 | Chile; France |
英文摘要 | Fog is an important water resource, especially in arid and semi-arid zones. The usual method to collect fog water is placing a rectangular mesh perpendicular to the wind which traps fog droplets. The collector catches a fraction of the fog's water droplets, allowing them to grow by coalescence until large enough to fall by gravity for collection. Fog events can last from minutes to hours, or even longer. This study aimed to evaluate the efficiency (eta) of a standard fog collector (SFC) to gather fog water. Efficiency is defined as the ratio between the water reaching the collector's gutter (CW) and the liquid water flux (LWF) normal to the collector's mesh, integrated in a period of time. After a fog event begins, mesh collectors require some time to reach saturation and begin dripping; further, the system does not achieve a stationary state at field conditions. Therefore, we considered entire fog events when evaluating efficiency. The CW was measured using a rain gauge, and the LWF was calculated based on the liquid water content (LWC) obtained through a fog droplet spectrometer, and data of wind velocity registered by a meteorological station. The duration of the analyzed events ranged from 20 min to 11 h 40 min. A lag of up to one hour between the arrival of fog and the beginning of the measured water output was observed. Both processes started simultaneously when preceded by another fog event. For the analyzed events, eta ranged between 0% and 36.8%. Isolated events of up to 30 minutes resulted in zero CW measurements because the mesh requires time to become saturated before dripping. Furthermore, eta was zero if the mean dew point depression (DPD) was above 0.2 degrees C or the mean LWC was below 0.045 g m(-3). We found that eta decreases with increasing mean volume diameter (MVD) for MVD greater than or similar to 10 mu m. Finally, eta increased with wind speed for events in which the MVD > 12 mu m. |
英文关键词 | Fog collection efficiency Fog Fog microphysics |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000435051100014 |
WOS关键词 | FRESH-WATER RESOURCE ; ATACAMA DESERT ; DEPOSITION ; CHILE ; PERSPECTIVES ; REGION ; COAST |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/38412 |
专题 | 地球科学 |
作者单位 | 1.Univ La Serena, Fac Ciencias, Dept Fis & Astron, Avda Juan Cistemas 1200, La Serena, Chile; 2.Univ Arturo Prat CERE UNAP, Ctr Estudio Recursos Energia, Iquique, Chile; 3.Univ La Serena, Inst Invest Multidisciplinario Ciencia & Tecn, Benavente 980, La Serena, Chile; 4.Int Org Dew Utilizat OPUR, 60 Rue Emeriau, F-75015 Paris, France; 5.Pontificia Univ Catolica Chile, Ctr Desierto Atacama, Avda Vicuna Mackenna 4860, Macul Santiago, Chile |
推荐引用方式 GB/T 7714 | Montecinos, Sonia,Carvajal, Danilo,Cereceda, Pilar,et al. Collection efficiency of fog events[J]. ATMOSPHERIC RESEARCH,2018,209:163-169. |
APA | Montecinos, Sonia,Carvajal, Danilo,Cereceda, Pilar,&Concha, Miguel.(2018).Collection efficiency of fog events.ATMOSPHERIC RESEARCH,209,163-169. |
MLA | Montecinos, Sonia,et al."Collection efficiency of fog events".ATMOSPHERIC RESEARCH 209(2018):163-169. |
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