光化学烟雾模拟实验系统

为开展光化学污染成因的敏感性分析，设计和建立了目前国内唯一的大型光化学烟雾模拟实验系统．该系统主要包括烟雾箱系统、空气充填置换系统、采样测试系统和记录显示控制系统等4个分系统．与国内外同类型实验系统相比，该系统具有烟雾箱在实验过程中受光均匀、换气系统快捷、效率高以及可实现两箱对比实验等特色．利用实验系统开展了光化学污染过程的模拟实验，得到了典型的污染特征．进行了同等条件的两箱对比实验，实验结果完全一致，表明该实验系统能够开展基于对比实验的敏感性分析研究，从而为进一步针对北京实际开展光化学污染的模拟研究奠定了良好的基础．

Investigation on experiment system for modeling of photochemical smog

In order to realize the sensitive analyse on the influence factors for formation of photochemical smog, the experimental system for modeling of photochemical smog are designed and established, which include smog chamber system, air replacing system, measuring system and controlling system. Compared with previous smog chambers, the main characteristics of this system are: (1) keeping whole chamber under the same light condition in whole experiment process; (2) high efficiency for air replacement; (3) being viable for comparative experiment of two chambers. The photochemical smog is successfully carried out by this system, and typical ozone distribution is obtained. The comparative experiment of two chambers under the same condition is also carried out, and the experiment results of two chambers are identical. It is shown that this system can be used for sensitive analyse based on the comparative experiment, which is important for further study on photochemical smog of Beijing air pollution.