Ozone reaction with human surfaces: Influences of surface reaction probability and indoor air flow condition

Rim, Donghyun; Gall, Elliott T.; Ananth, S. M.; Won, Youngbo

doi:10.1016/j.buildenv.2017.12.012

Cited by 35 publications

(49 citation statements)

References 42 publications

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“…The Cu 2 O layer exhibited four distinct peaks in the spectra at 150, 220, 420, and $640 cm À1 . 34 The origin of 150, 220, and $640 cm À1 peaks are known to be due to the G À (1) 15 , 2G À 12 and G À (2) 15 phonons in good agreement with the literature, [34][35][36] respectively. Also, the peak at 420 cm À1 is assigned to the region of the multiphonon process.…”

Section: Resultssupporting

confidence: 84%

A one-pot synthesis of a monolithic Cu₂O/Cu catalyst for efficient ozone decomposition

Rahimi

Wang

et al. 2020

RSC Adv.

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Section: Resultssupporting

confidence: 84%

A one-pot synthesis of a monolithic Cu₂O/Cu catalyst for efficient ozone decomposition

Rahimi

Wang

et al. 2020

RSC Adv.

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“…Model results are shown by the shaded areas, which are due to the range of parameters in Supplementary Table 2 decreases, the O 3 concentration decreases due to a decrease in ozone supply from outdoors, while gas-phase carbonyl concentrations increase as indoor-to-outdoor transport decreases allowing more time for these products to accumulate indoors. Note that at higher air exchange rates the boundary layer adjacent to the clothing is expected to be thinner 47 , which would lead to higher O 3 flux and an increase in carbonyl generation rates. ( Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

The impact of clothing on ozone and squalene ozonolysis products in indoor environments

et al. 2019

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Multiphase reactions of ozone with human skin oils impact indoor air quality by depleting ozone and forming semi-volatile organic compounds, which can be respiratory and skin irritants. Here we demonstrate the impact of clothing on indoor air composition and human exposure by integrating indoor chemistry modeling over a wide range of different spatial and temporal scales. Constrained by molecular dynamics simulations that provide key kinetic parameters, the kinetic model reproduces experimental measurements and predicts that squalene could persist in clothing for several hours to over a day depending on ozone concentrations. Soiled clothing protects skin from ozone exposure even with high concentrations, but can enhance concentrations of oxidation products to a ppb level depending on air exchange rates. Computational fluid dynamics simulations reveal that primary products have~1.6-2.0 times higher concentrations in the breathing zone than in bulk room air, while secondary products are distributed more uniformly throughout a room.

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“…Based on the previous studies and recommendations regarding CFD validation process [32][33][34][35][36], we performed experiments in a full-scale environmental chamber and used the measurement data for validating the CFD model as described in the following sections. Figure 1).…”

Section: Validation Of Cfd Modelmentioning

confidence: 99%

Effect of sensor position on the performance of CO2-based demand controlled ventilation

Pei

Rim

Schiavon

et al. 2019

Energy and Buildings

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CO2-based demand controlled ventilation (DCV) can save energy while maintaining acceptable indoor air quality. CO2 concentration may vary within an occupied space and it is unclear how sensor location influences the ventilation and energy performances. The objective of the present study is to investigate the effect of CO2 sensor position on the performance of DCV systems under mixing and displacement ventilation. Experimentally validated computational fluid dynamics (CFD) models were simulated under representative indoor ventilation and occupancy conditions. The results show that the ventilation strategy, occupancy level, and air change rate have notable impacts on the CO2 sensing performance. Under mixing ventilation, CO2 sensors placed at the room exhaust can meet the requirements of sensor accuracy defined by ASTM E741 and California Title 24. However, the sensor errors associated with sensor location can be higher than the acceptable threshold under displacement ventilation, which exhibits vertical CO2 stratification with two separated zones (lower transition zone and upper uniform zone). The dividing height of the two zones is highly sensitive to the occupancy level. In such cases, exhaust sensors can overestimate the breathing zone concentration and result in additional energy consumptions for thermal conditioning as well as fan operation, especially for densely occupied buildings. The study findings suggest that for ensuring good performance of CO2-based displacement ventilation, it is necessary to develop quantitative relationships between CO2 concentrations at the breathing height and the room exhaust considering ventilation strategies. Keywords: indoor air quality; CO2 sensing; computational fluid dynamics; building energy; displacement ventilation Highlights • CO2 sensors near occupants result in large errors under displacement ventilation • CO2 sensors at breathing height perform well for constant occupancy conditions • CO2 sensors at breathing height yield errors with varying occupancy • Under mixing ventilation, CO2 sensors at the room exhaust yield a good accuracy Energy and Buildings, Aug. 2019 ! https://doi.

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Ozone reaction with human surfaces: Influences of surface reaction probability and indoor air flow condition

Cited by 35 publications

References 42 publications

A one-pot synthesis of a monolithic Cu₂O/Cu catalyst for efficient ozone decomposition

A one-pot synthesis of a monolithic Cu₂O/Cu catalyst for efficient ozone decomposition

The impact of clothing on ozone and squalene ozonolysis products in indoor environments

Effect of sensor position on the performance of CO2-based demand controlled ventilation

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Ozone reaction with human surfaces: Influences of surface reaction probability and indoor air flow condition

Cited by 35 publications

References 42 publications

A one-pot synthesis of a monolithic Cu2O/Cu catalyst for efficient ozone decomposition

A one-pot synthesis of a monolithic Cu2O/Cu catalyst for efficient ozone decomposition

The impact of clothing on ozone and squalene ozonolysis products in indoor environments

Effect of sensor position on the performance of CO2-based demand controlled ventilation

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Product

Resources

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A one-pot synthesis of a monolithic Cu₂O/Cu catalyst for efficient ozone decomposition

A one-pot synthesis of a monolithic Cu₂O/Cu catalyst for efficient ozone decomposition