基于过滤浓度日数的新风PM2.5过滤负荷特性研究

Filtering Load of Outdoor PM2.5 for Buildings Based on Concept of Filtering Concentration Days

我国建筑环境PM2.5过滤或净化计算方法研究已引起广泛关注.针对我国不同区域新风PM2.5过滤负荷差异及变迁,引入不保证天数法,计算确定了各地区PM2.5新风设计负荷;类比空调度日数和采暖度日数提出过滤浓度日数FCD的概念;根据各地PM2.5动态浓度数据及其室内标准浓度,计算得到了历年全国省会及直辖市的FCD;利用统计学方法获得了各地区FCD和新风设计负荷的关系.研究结果表明,FCD指标清晰地反映了全国各地新风PM2.5设计计算负荷水平;FCD值与新风设计负荷表现为高度线性相关,显著性水平P<0.01;可用FCD来直接指示建筑PM2.5的新风设计负荷水平,可为将来新风PM2.5过滤系统设计、对比提供简单直观的依据.

Filtering loads of outdoor PM2.5 for all province capital of China are determined with the method of unguarantee days. The concept of filtering concentration days （FCD） is proposed with the analogy of the cooling degree days （CDD） and heating degroo days （HI）D）. Based on PM2.5 concentrations dynamic data and the base concentration, the FCDs of all province capital are calculated. The relationship between FCD and the filtering load of outdoor PM2. 5 is analyzed with a statistical way. The result shows： FCD is highly linear correlated with the filtering load of outdoor PM2.5 with P〈0.01. And FCD can be used as the climatic indicator of the demand for filtering services. Besides, it can provide a straightforward basis for the filtering system design.