[Particle Size Distribution and Diffusion for Simulated Cooking Fume].
[Particle Size Distribution and Diffusion for Simulated Cooking Fume].
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DOI：
10.13227/j.hjkx.201605110
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发表时间：
2017-01
期刊：
影响因子：
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通讯作者：
Shuang Li;Juntian Xu;Shengpeng Mo;Wen-Hui Li;Jiajia Gao;Yaqun Cao;Yunfa Chen
中科院分区：
文献类型：
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作者：
Shuang Li;Juntian Xu;Shengpeng Mo;Wen-Hui Li;Jiajia Gao;Yaqun Cao;Yunfa Chen
研究烹饪油烟的粒径分布和扩散特性有助于分析颗粒对室内空气质量以及居民健康的影响。分别在厨房空间的两个不同位置，在开启和关闭抽油烟机的情况下，使用电低压撞击器（ELPI）测量了粒径范围在0.03 - 10μm的颗粒数量和质量浓度。烹饪颗粒大多位于655nm以下。开启抽油烟机可显著减少厨房内的烹饪油烟。颗粒数量浓度从2.8×10⁶个/cm³降至2.3×10⁵个/cm³，PM2.5（空气动力学直径≤2.5μm的颗粒物）质量浓度从85.9mg/m³降至6.2mg/m³。抽油烟机对PM10的抽吸效率高于PM2.5。在距离烹饪区域3m处检测到的扩散过程中，颗粒数量浓度可降低65%，PM2.5烹饪油烟可降低75%。通过计算流体动力学模拟了油烟PM2.5质量浓度场的分布。通过红外摄像机监测油烟的温度场分布，呈现扇形扩散，温度从70℃降至室温。
Studying particle size distribution and dispersion characteristics of cooking oil fume can help to analyze the influence of the particles on indoor air quality and the health of the residents.Electrical low pressure impactor (ELPI) was employed to measure the number and mass concentration of the particles size range of 0.03-10 μm at two different locations in the kitchen space with smoke exhaust on and off,respectively.The cooking particles were mostly located at below 655 nm.The smoke exhaust with open condition could remarkably decrease the kitchen's cooking fume.The number concentration of particles decreased from 2.8×106 cm-3 to 2.3×105 cm-3,and PM2.5(aerodynamics diameter ≤2.5 μm particulate matter) mass concentrations decreased from 85.9 mg·m-3 to 6.2 mg·m-3.The sucking efficiency of smoke exhaust for PM10 was higher than PM2.5.The number concentration of particles could be declined by 65%,and the cooking fume of PM2.5 could be declined by 75% during the diffusion process detected at the area of 3 m far away from the area where cooking took place.The distribution of PM2.5 mass concentration field of oil fume was simulated by computational fluid dynamics.The temperature field distribution of oil fume was monitored by infrared camera,presenting sector diffusion with the temperature decreasing from 70℃ to room temperature.