DOI: 10.1016/j.atmosenv.2014.09.007
Scopus记录号: 2-s2.0-84907080129
论文题名: Estimates of HVAC filtration efficiency for fine and ultrafine particles of outdoor origin
作者: Azimi P ; , Zhao D ; , Stephens B
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 98 起始页码: 337
结束页码: 346
语种: 英语
英文关键词: Aerosols
; Filters
; Indoor air
; Modeling
Scopus关键词: Filters (for fluids)
; Models
; Filtration efficiency
; Fine and ultrafine particles
; Indoor air
; Aerosols
; aerosol
; air quality
; filter
; filtration
; heating
; indoor air
; particle size
; standard (regulation)
; estimation method
; infiltration
; numerical model
; particulate matter
; pollutant removal
; ventilation
; air conditioning
; air filter
; ambient air
; Article
; environmental parameters
; filtration
; heating
; heating, ventilating, and air conditioning filter system
; particle size
; air conditioning
; density
; fine particle
; heating
; particle size
; particulate matter
; rural area
; summer
; ultrafine particle
; urban area
; winter
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: This work uses 194 outdoor particle size distributions (PSDs) from the literature to estimate single-pass heating, ventilating, and air-conditioning (HVAC) filter removal efficiencies for PM2.5 and ultrafine particles (UFPs: <100 nm) of outdoor origin. The PSDs were first fitted to tri-modal lognormal distributions and then mapped to size-resolved particle removal efficiency of a wide range of HVAC filters identified in the literature. Filters included those with a minimum efficiency reporting value (MERV) of 5, 6, 7, 8, 10, 12, 14, and 16, as well as HEPA filters. We demonstrate that although the MERV metric defined in ASHRAE Standard 52.2 does not explicitly account for UFP or PM2.5 removal efficiency, estimates of filtration efficiency for both size fractions increased with increasing MERV. Our results also indicate that outdoor PSD characteristics and assumptions for particle density and typical size-resolved infiltration factors (in the absence of HVAC filtration) do not drastically impact estimates of HVAC filter removal efficiencies for PM2.5. The impact of these factors is greater for UFPs; however, they are also somewhat predictable. Despite these findings, our results also suggest that MERV alone cannot always be used to predict UFP or PM2.5 removal efficiency given the various size-resolved removal efficiencies of different makes and models, particularly for MERV 7 and MERV 12 filters. This information improves knowledge of how the MERV designation relates to PM2.5 and UFP removal efficiency for indoor particles of outdoor origin. Results can be used to simplify indoor air quality modeling efforts and inform standards and guidelines. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80553
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil, Architectural and Environmental Engineering, Illinois Institute of Technology, Chicago, IL, United States
Recommended Citation:
Azimi P,, Zhao D,, Stephens B. Estimates of HVAC filtration efficiency for fine and ultrafine particles of outdoor origin[J]. Atmospheric Environment,2014-01-01,98