Analysis of Capture and Containment Efficiency of a Ventilated Ceiling
Analysis of Capture and Containment Efficiency of a Ventilated Ceiling
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DOI：
10.1080/14733315.2003.11683651
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发表时间：
2003-06
影响因子：
1.5
通讯作者：
Kosonen Risto;Mustakallio Panu
中科院分区：
文献类型：
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作者：
Kosonen Risto;Mustakallio Panu
摘要在厨房环境中，排气系统的效率是特别重要的，其中排气位于天花板水平。必须保证整个系统的捕获效率，以防止杂质在整个厨房中扩散。导出了一个捕集效率模型，并用它来估计通风吊顶的效率。本文表明，一个简单的方程，其中包括在占用区的平均污染物水平和废气浓度可以是一个合适的平台，在测量和模拟的捕获效率分析。在2.3米的天花板高度下，捕获和容纳效率可高达85 - 90%;在2.6米的天花板高度下，捕获和容纳效率为80 - 85%。这些值与德国实践规范中默认通风柜的捕获效率相比是相当合理的（W. P.，1984）。
Abstract The efficiency of an exhaust system is especially important in a kitchen environment in which the exhaust is located at ceiling level. The capture efficiency of the total system must be guaranteed so that the spread of impurities throughout the kitchen is prevented. A capture efficiency model is derived and it is used to estimate the efficiency of a ventilated ceiling. This paper demonstrates that a simple equation that includes the average contaminant level in the occupied zone and the exhaust concentration could be a suitable platform for capture efficiency analysis in both measurements and simulations. With a ceiling height of 2.3 m, the capture and containment efficiency can be as high as 85 - 90 %; with a 2.6 m ceiling height it is 80 – 85 %. These values are quite reasonable compared with the capture efficiency of a default hood in the German code of practice (VDI, 1984).