Assessment of pre-filter systems to control indoor inflow of particulate matter

Kim, Minju; Jeong, Su-Gwang; Park, Jong-Il; Lee, Jeong-Hun

doi:10.1016/j.jobe.2021.103052

Cited by 3 publications

(1 citation statement)

References 27 publications

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“…Air purification devices, such as air filters and ultraviolet (UV) lamps, are commonly utilized and combined with indoor ventilation systems to remove indoor pollutants (Wang et al 2009;Abdolghader et al 2018;Feng et al 2021a). Air filters are based on the physical capture mechanisms of diffusion, interception, and inertia to remove indoor pollutants (Kim et al 2021). However, the accumulation of pollutants (such as particles) may result in a high pressure drop, increased energy consumption, and replacement cost for fiber filters (Li et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Impact of ionizers on prevention of airborne infection in classroom

et al. 2022

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Infectious diseases (e.g., coronavirus disease 2019) dramatically impact human life, economy and social development. Exploring the low-cost and energy-saving approaches is essential in removing infectious virus particles from indoors, such as in classrooms. The application of air purification devices, such as negative ion generators (ionizers), gains popularity because of the favorable removal capacity for particles and the low operation cost. However, small and portable ionizers have potential disadvantages in the removal efficiency owing to the limited horizontal diffusion of negative ions. This study aims to investigate the layout strategy (number and location) of ionizers based on the energy-efficient natural ventilation in the classroom to improve removal efficiency (negative ions to particles) and decrease infection risk. Three infected students were considered in the classroom. The simulations of negative ion and particle concentrations were performed and validated by the experiment. Results showed that as the number of ionizers was 4 and 5, the removal performance was largely improved by combining ionizer with natural ventilation. Compared with the scenario without an ionizer, the scenario with 5 ionizers largely increased the average removal efficiency from around 20% to 85% and decreased the average infection risk by 23%. The setup with 5 ionizers placed upstream of the classroom was determined as the optimal layout strategy, particularly when the location and number of the infected students were unknown. This work can provide a guideline for applying ionizers to public buildings when natural ventilation is used.

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Section: Introductionmentioning

confidence: 99%

Impact of ionizers on prevention of airborne infection in classroom

et al. 2022

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Investigating the impact of relative humidity and air tightness on PM sedimentation and concentration reduction

Kim¹,

Jeong

Park³

et al. 2023

Building and Environment

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Optimal Air Flow Modeling in Real Healthcare Facilities for Quick Removal of Contaminated Air

Altwijri,

Javed,

Algabri

et al. 2024

Processes

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Background: Contaminated air can have a negative impact on patient recovery, leading to longer hospital stays, higher healthcare costs, and even death. Objective: Our study focuses on improving indoor air quality for patient recovery in healthcare facilities. Methods: We conducted computational analysis using the finite element modeling (FEM) technique to investigate the flow of contaminated air exhaled by a patient. Distinct models were examined: a neonatal intensive care unit (NICU) with two-beds and a coronavirus isolation room (CIR). Using ANSYS, we designed models using actual and real specifications of both NICUs and IRs from local hospitals. We determined the optimal dimensions and locations of outlet vents in NICUs and CIRs using simulations with ANSYS software drawing on our designed modeling of air flow. Outlet vent dimensions and locations were modified to achieve optimal air flow for quickly venting out contaminated air from a patient in a room. Results: The results show a substantial improvement in directly venting out the contaminated air from the patient. Conclusions: It can be concluded that the optimal design of outlet vent locations and dimensions using ANSYS simulation results in finding the optimal path for the quick removal of contaminated air flow from the patient in an NICU and CIR.

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Assessment of pre-filter systems to control indoor inflow of particulate matter

Cited by 3 publications

References 27 publications

Impact of ionizers on prevention of airborne infection in classroom

Impact of ionizers on prevention of airborne infection in classroom

Investigating the impact of relative humidity and air tightness on PM sedimentation and concentration reduction

Optimal Air Flow Modeling in Real Healthcare Facilities for Quick Removal of Contaminated Air

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