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Laboratory performance of new and used residential HVAC filters: Comparison to field results (RP-1649)

机译：新旧居民HVAC过滤器的实验室性能：与现场结果的比较（RP-1649）

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摘要

Particle filters are used in heating, ventilating, and air-conditioning (HVAC) systems to protect equipment and reduce exposure to airborne particles. Filtration standards such as ANSI/ASHRAE Standard 52.2 are used to evaluate filter performance in a laboratory setting. In this work, we examined the lab-tested performance of new filters with different nominal efficiencies as determined by ASHRAE Standard 52.2 and compared these results to the lab-tested and in-situ performance of filters deployed in 21 occupied residential environments. The lab-tested results comparison shows that the dust loading and conditioning procedure in ASHRAE Standard 52.2 provides a reasonable range of efficiencies for the used filters, but the target final pressure drop of 250 Pa is an overestimation of the realistic pressure drops. Moreover, the specified test dust was not a good representation of the dust in this sample of residential environments. The lab-tested and in-situ results comparison suggests that even for the same filter, its lab-tested performance could differ greatly from its in-situ performance because of variations in system and loading conditions, which are not captured in the laboratory setting. Overall, the lab-tested results are an overestimation of the in-situ efficiency and an underestimation of the in-situ pressure drop for both new and used filters.
机译：颗粒过滤器用于加热，通风和空调（HVAC）系统，以保护设备并减少暴露于空气颗粒。过滤标准如ANSI / ASHRAE标准52.2用于评估实验室设置中的过滤器性能。在这项工作中，我们检查了由Ashrae标准52.2确定的具有不同标称效率的新滤波器的实验室测试性能，并将这些结果与部署在21个占用的住宅环境中部署的过滤器的实验室和原位性能进行了比较。实验室测试结果比较表明，ASHRAE标准52.2中的粉尘载荷和调理程序为使用过滤器提供了合理的效率，但是250 PA的目标最终压降是对现实压降的高估。此外，规定的试验灰尘不是该住宅环境样本中灰尘的良好代表。实验室测试和原位结果比较表明，即使对于相同的过滤器，其实验室测试的性能也可能因其原位性能而差异很大，因为系统和装载条件的变化，在实验室环境中未被捕获。总的来说，实验室测试结果是对原位效率的高估和低估了新的和使用过滤器的原位压降。

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