Physical characterization of particulate matter and ambient meteorological parameters at different indoor–outdoor locations in Singapore

Gupta, Abhishek; Cheong, David

doi:10.1016/j.buildenv.2006.02.017

Cited by 38 publications

(11 citation statements)

References 10 publications

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“…The trend for size-resolved I/O ratios of particles with diameters 0.3-5.0 µm generally agrees with the findings reported by Gupta and Cheong. [32] for ACMV-dominated indoor environments. These findings also align with theoretically predicted results that fibrous particle filters usually have minimum efficiencies for diameters in the range 0.05-0.5 µm [11].…”

Section: Particle I/o Ratiosmentioning

confidence: 99%

Indoor and outdoor particles in an air-conditioned building during and after the 2013 haze in Singapore

Chen

Cao

Zhou

et al. 2016

Building and Environment

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14Particles released from biomass burning can contribute to severe air pollution. We monitored 15 indoor and outdoor particles in a mechanically ventilated and air-conditioned building during 16 and after the 2013 haze event in Singapore. Continuous monitoring of time-and size-resolved 17 particles in the diameter range 0.01-10 µm was conducted for two weeks in each sampling 18 campaign. During the haze event, the averaged size-resolved outdoor particle volume 19 concentrations (dV/d(logD p )) for diameters larger than 0.3 µm were considerably higher than 20 those during the post-haze days (9-185 µm 3 cm -3 versus 1-35 µm 3 cm -3 ). However, the 21 average number concentration of particles with diameters in the range 10-200 nm was 22 substantially lower on the hazy days than on the post-haze days (11,400 to 14,300 particles 23 cm -3 for hazy days, versus an average of 23,700 particles cm -3 on post-haze days). The 24 building mechanical ventilation system, equipped with MERV 7 filters, attenuated the 25 penetration and persistence of outdoor particles into the monitored building. The air conditioning and mechanical ventilation system with MERV 7 filters provided low 31 single-pass removal efficiency (less than ~ 30%) for particles with diameters of 0.01-1.0 µm. 32During the haze, for particles larger than ~ 0.2 µm, lower I/O ratios and higher removal 33 efficiencies occurred with the air conditioning operating as compared to with mechanical 34 ventilation only. This observation suggests the possibility of particle loss to air conditioning 35 system surfaces, possibly enhanced by thermophoretic or diffusiophoretic effects. 36

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Section: Particle I/o Ratiosmentioning

confidence: 99%

Indoor and outdoor particles in an air-conditioned building during and after the 2013 haze in Singapore

Chen

Cao

Zhou

et al. 2016

Building and Environment

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“…We rely on a literature in environmental sciences, engineering and epidemiology that finds that fine (including ultrafine) particles penetrate indoors, e.g., Morawska et al (2001), Cyrys et al (2004), Gupta and Cheong (2007). For example, Cyrys et al (2004) report, for a given microenvironment they study, that with "closed windows, the I/O (indooroutdoor) ratios for PM2.5 are .…”

Section: Data and Descriptive Analysismentioning

confidence: 99%

Severe Air Pollution and Labor Productivity

Liu

Salvo

2015

SSRN Journal

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Standard-Nutzungsbedingungen:Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden.Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen.Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen Nutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte. www.econstor.eu Terms of use: Documents in D I S C U S S I O N P A P E R S E R I E S ABSTRACT Severe Air Pollution and Labor ProductivityWe examine day-to-day fluctuations in worker-level output over 15 months for a panel of 98 manufacturing workers at a plant located in an industrial city in Hebei province, north China. Long-term workers earn piece-rate wages, with no base pay or minimum pay, for homogeneous tasks performed over fixed 8-hour shifts. Over the sample period, ambient fine-particle (PM2.5) mass concentrations measured at an outdoor air monitor located 2 km from the plant ranged between 10 and 773 micrograms per cubic meter (µg/m 3 , 8-hour means), variation that is an order of magnitude larger than what is observed in the rich world today. We document large reductions in productivity, of the order of 15%, over the first 200 µg/m 3 rise in PM2.5 concentrations, with the drop leveling off for further increases in fineparticle pollution. A back-of-the-envelope calculation suggests that labor productivity across 190 Chinese cities could rise by on average 4% per year were the distributions of hourly PM2.5 truncated at 25 µg/m 3 . We also find reduced product quality as pollution rises. Our model allows for selection into work attendance, though we do not find particle pollution to be a meaningful determinant of non-attendance, which is very low in our labor setting. Subsequent research should verify the external validity of our findings. JEL Classification:J24, Q51, Q52, Q53, O44, R11

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“…It has 8 floors and situated near an intersection between the university's entrance and a busy road along side the university compound. Due to the open spatial concept of the building complex, vertical dispersion of traffic related pollutants is enhanced [22]. The measurements were conducted on the seventh floor office (floor area: 742 m 2 ; volume ¼ 1950 m 3 ) which is carpeted and has a tight glass structure.…”

Section: Study Buildingmentioning

confidence: 99%

Reducing particle exposures in a tropical office building using electrostatic precipitators

Zuraimi¹,

Tham²

2009

Building and Environment

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Physical characterization of particulate matter and ambient meteorological parameters at different indoor–outdoor locations in Singapore

Cited by 38 publications

References 10 publications

Indoor and outdoor particles in an air-conditioned building during and after the 2013 haze in Singapore

Indoor and outdoor particles in an air-conditioned building during and after the 2013 haze in Singapore

Severe Air Pollution and Labor Productivity

Reducing particle exposures in a tropical office building using electrostatic precipitators

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