控制室内甲醛和PM 2.5的新风净化系统优化设计

Optimization Design of Fresh Air Purification System with Formaldehyde and PM2.5 Controled in Purification Room

目的探讨在新风净化系统下室内空气品质的变化情况,提出控制室内污染物的合理方法.方法建立数学模型,以某办公房间在雾霾天气典型工况下的实测结果对计算模型进行验证;模拟3种送风方式和3种排风口位置下新风净化系统对室内甲醛和可吸入肺颗粒物PM 2.5的净化情况.结果3种送风方式中,置换通风方式对室内污染物的净化效果最好;3种排风口位置中,靠近污染源的位置,新风净化系统对室内污染物的净化效果最好.结论当室外PM 2.5的质量浓度≤150μg/m 3时,新风净化系统能够较好地净化室内PM 2.5,当室内采用置换通风方式,并将排风口布置在靠近污染源的位置时,新风净化系统对污染物的净化效果最好.

The change of indoor air quality under the fresh air purification system was explored to be proposed a reasonable method to control indoor pollutants.In this paper,a mathematical model is established,and verified by the measured results of a certain office room under typical working conditions in haze weather.The purification of indoor formaldehyde and PM 2.5 particles with fresh air purification system under three air supply modes and three air return ports simulated was investigated.The results show that among of the three kinds of air supply way,the way of displacement ventilation on indoor pollutants purification effect is best;among of the 3 kinds of return air mouth position,purification effect with the position close to the location of the pollution sources is best;When the outdoor PM 2.5 mass concentration≤150μg/m 3,the fresh air purification system can achieve a better purification effect for indoor PM 2.5.When displacement ventilation is adopted in the room and the return air outlet is arranged near the pollution source,the fresh air purification system has the best purification effect on pollutants.