Direct capture efficiency of range hoods in the confined kitchen space

Cao, Changsheng; Xie, Wuhao; Xia, Yunfei; Gao, Jun

doi:10.1007/s12273-022-0898-8

Cited by 11 publications

(3 citation statements)

References 37 publications

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“…Third, the indoor air is assumed to be well-mixed and the UFP concentrations are assumed to be uniformly distributed over the whole residence after the kitchen door is opened. Computational fluid dynamics (CFD) models can provide more details of indoor air pollutants throughout the residence. − However, they require a huge number of calculations, limiting the application of CFD methods to extensive long-term modeling, including the Monte Carlo simulation in this study. Further CFD models need to be conducted for dimensionless quantities that reflect UFPs’ temporal and spatial distribution.…”

Section: Resultsmentioning

confidence: 99%

Indoor Emissions Contributed the Majority of Ultrafine Particles in Chinese Urban Residences

Chen,

Zhao

2024

Environ. Sci. Technol.

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Ultrafine particle (UFP) pollution should be controlled to reduce its effects on health. The design of control measures is limited owing to the uncertainty of source contributions in Chinese residences, where indoor UFP pollution is more severe than in Western residences. Herein, a sourcespecific, time-dependent UFP concentration model was developed by applying an infiltration factor model incorporating coagulation effects. A Monte Carlo framework with the UFP concentration model was employed to estimate the probabilistic distribution of source contributions in Chinese residences. The input parameter distributions were determined based on our survey and previous studies. The annually averaged indoor UFP concentration was estimated at (2.75 ± 1.71) × 10 4 #/cm 3 , ranging from 2.35 × 10 3 to 1.27 × 10 5 #/cm 3 outside the kitchen, and at (5.48 ± 3.08) × 10 4 #/cm 3 , ranging from 2.90 × 10 3 to 1.94 × 10 5 #/cm 3 in the kitchen. Indoor sources contributed more to indoor UFPs, accounting for 61% in the nonkitchen and 80% in the kitchen, surpassing their contribution to indoor PM 2.5 in Chinese residences. Meanwhile, the indoor UFP emission contributions were higher than those in the United States, Canada, and Germany, owing to higher emissions from cooking and cigarette smoking. These results will aid in elucidating human exposure to UFPs and in designing more targeted control measures.

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Section: Resultsmentioning

confidence: 99%

Indoor Emissions Contributed the Majority of Ultrafine Particles in Chinese Urban Residences

Chen,

Zhao

2024

Environ. Sci. Technol.

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“…Xie et al 37 performed CFD to determine the capture efficiency during the cooking and post-cooking period at different exhaust rates for the range hood. Cao et al 38 performed CFD simulations on indoor airflow and pollutant concentration for calculating direct capture efficiency in a confined kitchen space and confirmed that different make-up airflow patterns resulted in distinguished airflow distribution. Lu et al 39 investigated the make-up air systems for pollutant removal with a push–pull ventilation system.…”

Section: Introductionmentioning

confidence: 92%

“…Zhang and Chen 29 compared these two models in predicting the transient dispersion of particles in an enclosed space and found that the Lagrangian method for particle trajectories under unsteady numerical simulation was better than the Eulerian method. Cao et al 38 simulated capture efficiency of range hoods in numerical simulation. Wang et al 8,9 predicted ultrafine particle distributions based on this improved drift flux model with three particle diameters under different exhaust hood positions and ventilation modes.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the indoor environment during a whole cooking process under constant make-up air organization in a Chinese-style residential kitchen

Liu

et al. 2023

Indoor and Built Environment

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A large amount of heat and particles generated from cooking have a negative impact on occupants’ thermal comfort as well as the indoor environment in the kitchen and adjacent rooms. Although heat generation rate and emission strength of particles are largely affected by oil temperature and cooking duration, there is a lack of quantification on the impact of the indoor environment during the whole cooking process. This study applies a computational fluid dynamics method to simulate air temperature, velocity and particle distribution in a kitchen and indoor environment during a 10-min and after 2-min cooking process with constant make-up air organization from window opening in a Chinese-style residential kitchen. User-defined function was defined for dynamic oil temperature and emission rate based on experimental results from previous studies and was interpreted in FLUENT for transient simulation within 12 min. Results indicate that heat spread remarkably after 30 s of oil heating. Air temperature experienced an increase of about 10.0°C around the occupant during the whole cooking process. For particle distribution, a large variation in the kitchen was observed after 4 min. Particle concentration in an indoor environment was increased dramatically after 6 min. Further studies on the transmission mechanism of heat and particles from the kitchen space to an adjacent room under different cooking scenarios are needed for the design and control of kitchen ventilation.

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Characterization of time- and size-dependent particle emissions and decay from cooking oil fumes in residence: Impacts of various intervention measures

Xiang

Hao

et al. 2023

Build. Simul.

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Direct capture efficiency of range hoods in the confined kitchen space

Cited by 11 publications

References 37 publications

Indoor Emissions Contributed the Majority of Ultrafine Particles in Chinese Urban Residences

Indoor Emissions Contributed the Majority of Ultrafine Particles in Chinese Urban Residences

Investigation on the indoor environment during a whole cooking process under constant make-up air organization in a Chinese-style residential kitchen

Characterization of time- and size-dependent particle emissions and decay from cooking oil fumes in residence: Impacts of various intervention measures

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