新型净化器的室内不同位置PM_(2.5)净化时间预测模型研究

Study on prediction model of PM_(2.5) purification time in different indoor locations of new purifiers

现今空气净化器的使用大多依赖于个人习惯,既不能确定空气净化器的最佳运行方式,也不能使室内人员处得到优先净化。为了实现室内人员位置处在净化器的使用过程中得到优先净化的目的,本文在净化器无仰角和最大风速(3 m/s)下采用实验结合模拟的研究方法,用实验数据验证和完善模型,通过对模拟结果PM的净化时间数据的深入讨论和分析,研究净化器的运行模式对室内不同位置净化时间的影响,并为建立净化时间预测模型总结归纳回归资料;采用SPSS软件对回归资料进行多元线性/非线性回归分析的基础上,建立净化时间预测模型,同时利用模拟结果对预测模型进行准确性验证。研究表明:该模式下PM净化时间与各影响因子之间呈非线性关系,与房间面积及其平方、房间长宽比及其平方、PM初始浓度及其平方、人员距离呈负相关。与房间面积和房间长宽比乘积、房间面积和PM初始浓度乘积、房间面积和人员距离乘积、房间长宽比和PM初始浓度乘积、PM初始浓度和人员距离乘积、人员距离的平方呈正相关;房间面积对人员处净化时间的影响贡献率最大,为30.08%,人员距净化器的距离对人员处净化时间的影响贡献率最小,为20.07%。可见改变房间面积对净化时间的影响最大;当房间面积固定时,房间长宽比对于PM净化时间的影响程度最大,由25.01%增加到35.76%;PM初始浓度贡献率次之,由24.85%增加到35.54%;人员距离的贡献率最低,由20.07%增加28.70%。可见,房间长宽比和PM初始浓度对PM净化时间的影响程度更显著,故在净化器实际使用过程中,应着重考虑PM初始浓度和房间长宽比的影响。

The use of air purifiers today is mostly dependent on personal habits,which neither determine the best way to operate the air purifier nor allow indoor personnel location to be purified first.In order to achieve the purpose of prioritizing purification at the location of indoor personnel,this paper adopts the research method of experiment combined with simulation under the condition of no elevation angle and maximum wind speed (3m/s) of the purifier,and uses experimental data to verify and improve the model.Through in-depth discussion and analysis of the purification time data of the simulated PM,the influence of the operation mode of the purifier on the purification time of different indoor locations was studied,and the regression data was summarized for the establishment of the purification time prediction model;SPSS software was used to analyze the regression data.The research shows that:in this mode,PMpurification time has no linear relationship with various influencing factors,while it is negatively related to room area and its square,room length/width ratio and its square,PMinitial concentration and its square,and distance between personnel and purifier;it is positively related to product of room area and room length/width ratio,product of room area and PMinitial concentration,product of room area and personnel distance,product of room length/width ratio and PMinitial concentration,product of PMinitial concentration and personnel distance,and the square of the personnel distance.The room area has the largest contribution rate,while the distance between personnel and purifier has the smallest contribution rate to the purification time of the personnel location,which are 30.08%and20.07%respectively.It can be seen that changing the room area has the greatest impact on the purification time;when the room area is fixed,the room length/width ratio has the greatest influence on the PMpurification time,rising from 25.01%to 35.76%;Seconded by the PMinitial concentration,rising from 24.85%to 35.54%;the contribution rate of personnel distance was the lowest,which increased from 20.07%to 28.70%.It can be seen that the effect of the room length/width ratio and the initial PMconcentration on the PMpurification time is more significant.Therefore,in the actual use of the purifier,the impact of the initial PMconcentration and the room length/width ratio should be considered.