Survey on indoor airborne particle and PM 2.5 in office buildings

Naoki Kagi, Naoya Nishimura, U. Yanagi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Characterization and emission of indoor sub-micron aerosols have been of great interest. This study aimed at investigating for characteristics of particle concentrations for size distribution in office buildings. The number of size distributions, PM 2.5 and SPM (less than 10 μm) mass concentrations were measured in 15 large office buildings that were over 3,000m 2 of total floor areas and had central HVAC systems. As a result, the mass concentration shows a bimodal distribution at around 0.2-0.3 μm and 4 μm, while the number concentration has a smaller peak at 0.02 to 0.05 μm. The results of other buildings have the same trend of particle size-distributions. Every mass concentration was relatively low, except for the building, which had smoking area inside. PM 2.5 ratios (PM 2.5/SPM conc.) were around 0.8, and therefore SPM forms the greater part of PM 2.5. The peak of mass concentration distribution around 0.2 μm has a great effect on PM 2.5 concentrations. The sub-micron particles might penetrate through filter media in HVAC systems from outdoor air.

Original languageEnglish
Pages (from-to)613-616
Number of pages4
JournalAIJ Journal of Technology and Design
Volume18
Issue number39
DOIs
Publication statusPublished - 2012

Fingerprint

Office buildings
Particle size analysis
Aerosols
Air
HVAC

Keywords

  • Airborne particle
  • Indoor air quality
  • Office building
  • PM

ASJC Scopus subject areas

  • Building and Construction
  • Architecture

Cite this

Survey on indoor airborne particle and PM 2.5 in office buildings. / Kagi, Naoki; Nishimura, Naoya; Yanagi, U.

In: AIJ Journal of Technology and Design, Vol. 18, No. 39, 2012, p. 613-616.

Research output: Contribution to journalArticle

@article{9a1045d552194359b8a06071b88a10a6,
title = "Survey on indoor airborne particle and PM 2.5 in office buildings",
abstract = "Characterization and emission of indoor sub-micron aerosols have been of great interest. This study aimed at investigating for characteristics of particle concentrations for size distribution in office buildings. The number of size distributions, PM 2.5 and SPM (less than 10 μm) mass concentrations were measured in 15 large office buildings that were over 3,000m 2 of total floor areas and had central HVAC systems. As a result, the mass concentration shows a bimodal distribution at around 0.2-0.3 μm and 4 μm, while the number concentration has a smaller peak at 0.02 to 0.05 μm. The results of other buildings have the same trend of particle size-distributions. Every mass concentration was relatively low, except for the building, which had smoking area inside. PM 2.5 ratios (PM 2.5/SPM conc.) were around 0.8, and therefore SPM forms the greater part of PM 2.5. The peak of mass concentration distribution around 0.2 μm has a great effect on PM 2.5 concentrations. The sub-micron particles might penetrate through filter media in HVAC systems from outdoor air.",
keywords = "Airborne particle, Indoor air quality, Office building, PM",
author = "Naoki Kagi and Naoya Nishimura and U. Yanagi",
year = "2012",
doi = "10.3130/aijt.18.613",
language = "English",
volume = "18",
pages = "613--616",
journal = "AIJ Journal of Technology and Design",
issn = "1341-9463",
publisher = "Architectural Institute of Japan",
number = "39",

}

TY - JOUR

T1 - Survey on indoor airborne particle and PM 2.5 in office buildings

AU - Kagi, Naoki

AU - Nishimura, Naoya

AU - Yanagi, U.

PY - 2012

Y1 - 2012

N2 - Characterization and emission of indoor sub-micron aerosols have been of great interest. This study aimed at investigating for characteristics of particle concentrations for size distribution in office buildings. The number of size distributions, PM 2.5 and SPM (less than 10 μm) mass concentrations were measured in 15 large office buildings that were over 3,000m 2 of total floor areas and had central HVAC systems. As a result, the mass concentration shows a bimodal distribution at around 0.2-0.3 μm and 4 μm, while the number concentration has a smaller peak at 0.02 to 0.05 μm. The results of other buildings have the same trend of particle size-distributions. Every mass concentration was relatively low, except for the building, which had smoking area inside. PM 2.5 ratios (PM 2.5/SPM conc.) were around 0.8, and therefore SPM forms the greater part of PM 2.5. The peak of mass concentration distribution around 0.2 μm has a great effect on PM 2.5 concentrations. The sub-micron particles might penetrate through filter media in HVAC systems from outdoor air.

AB - Characterization and emission of indoor sub-micron aerosols have been of great interest. This study aimed at investigating for characteristics of particle concentrations for size distribution in office buildings. The number of size distributions, PM 2.5 and SPM (less than 10 μm) mass concentrations were measured in 15 large office buildings that were over 3,000m 2 of total floor areas and had central HVAC systems. As a result, the mass concentration shows a bimodal distribution at around 0.2-0.3 μm and 4 μm, while the number concentration has a smaller peak at 0.02 to 0.05 μm. The results of other buildings have the same trend of particle size-distributions. Every mass concentration was relatively low, except for the building, which had smoking area inside. PM 2.5 ratios (PM 2.5/SPM conc.) were around 0.8, and therefore SPM forms the greater part of PM 2.5. The peak of mass concentration distribution around 0.2 μm has a great effect on PM 2.5 concentrations. The sub-micron particles might penetrate through filter media in HVAC systems from outdoor air.

KW - Airborne particle

KW - Indoor air quality

KW - Office building

KW - PM

UR - http://www.scopus.com/inward/record.url?scp=84864238980&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84864238980&partnerID=8YFLogxK

U2 - 10.3130/aijt.18.613

DO - 10.3130/aijt.18.613

M3 - Article

AN - SCOPUS:84864238980

VL - 18

SP - 613

EP - 616

JO - AIJ Journal of Technology and Design

JF - AIJ Journal of Technology and Design

SN - 1341-9463

IS - 39

ER -