再议一般通风用空气过滤器国际标准ISO 16890：2016
Further discussion on ISO 16890:2016 Air filters for general ventilation
摘要：
ISO 16890：2016一般通风用空气过滤器标准是在欧美现有标准的基础上创建的用以确定空气过滤器对细颗粒物PM2.5等的计重过滤效率为目标的标准。该标准认为在给定的粒径范围内空气动力学当量直径可视为等同于光学当量直径，据此以空气过滤器对人工气溶胶的计径计数效率和典型大气气溶胶体积分布数学模型，计算得到对PM2.5等的计重过滤效率。欧洲并拟以此标准取代EN 779等现行标准。对ISO 16890：2016标准的相关问题进行了探讨，并对我国制定相关标准提出了一些看法和建议。
Abstract：
The ISO 16890:2016 standard of Air filters for general ventilation is a standard established on the basis of existing criteria of EU and US to determine the particulate matter gravimetric efficiency of air filters for PMx. The standard considers that the aerodynamic equivalent diameter can be regarded as equivalent to the optical equivalent diameter within a given particle size range. Based on this, using the aerosol fractional efficiency of air filter and the mathematical model of the standard volume distribution of the ambient air particles, obtains the gravimetric efficiency for PMx by calculation. EU even prepares to replace EN 779 with ISO 16890. Discusses the related issues of the ISO 16890:2016 standard and proposes some opinions and suggestions on the formulation of relevant standards in China.
Keywords:airfilter,filterefficiency,aerodynamicequivalentdiameter,discreteparticlevolumedistribution,cumulativeparticlevolumedistribution,ambientairstandardparticlesizedistribution