Design of the ventilation system and the simulation of air flow in the negative isolation room using FloVent 8.2

Alhamid, Muhammad Idrus; Budihardjo,; Raymond, André

doi:10.1063/1.5046600

Cited by 6 publications

(3 citation statements)

References 1 publication

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“…The computational fluid dynamic (CFD) simulation has been applied to calculate the contaminant transport in isolation rooms and to predict the effect of airflow behavior on virus transmission [ [4] , [5] , [6] , [7] , [8] , [9] ]. Cho et al [ 10 ] and Hang et al [ 11 ] used the tracer gas simulation to analyze the possibility of pathogen propagation through airflow in isolation rooms and showed that the locations of supply and outlet air streams are the most important elements that directly affect the pollutants dispersion.…”

Section: Introductionmentioning

confidence: 99%

Behavior of cough droplets emitted from Covid-19 patient in hospital isolation room with different ventilation configurations

Dao

Kim

2022

Building and Environment

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The world is now facing the Covid-19 pandemic and the control of Covid-19 spread in health care facilities is a serious concern. The ventilation system in hospital isolation rooms with infectious patients plays a significant role in minimizing the spread of viruses and the risk of infection in hospital. In this study, computational fluid dynamics (CFD) simulation is applied to investigate the important factors on transport and evaporation of multi-component cough droplets in the isolation room with different ventilation configurations. We analyzed the effects of various air outlet positions on the removal efficiency of infectious droplets in isolation room and proposed the optimum location of exhaust vent in hospital isolation room to maximize the droplet removal efficiencies. We found that the evaporation rate of droplets is strongly dependent on the relative humidity (RH) and, at low RH, the large-sized droplets with Covid-19 virus can evaporate quickly and become small-sized aerosols to stay in air for a long time and the Covid-19 can propagate more easily through the respiratory organs during breathing. It also explains why the Covid-19 can propagate faster in winter with low humidity than in summer with high humidity.

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Section: Introductionmentioning

confidence: 99%

Behavior of cough droplets emitted from Covid-19 patient in hospital isolation room with different ventilation configurations

Dao

Kim

2022

Building and Environment

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“…Each strategy uses different locations of air outlets and results show that outlets in the low-level locations had better pollutant removal efficiency. Kao et al [9] created a cough model was constructed and a study is done on how virus diffusion and airflow behavior occur for various ventilation arrangements in a negative pressure room, also analysis was done on the region of droplet fallout and the dilution time of virus diffusion of coughed gas in the isolation. The results obtained states that parallel directional airflow pattern is the most effective means of controlling flows containing virus droplets.…”

Section: Introductionmentioning

confidence: 99%

CFD modelling of airborne virus diffusion characteristics in a negative pressure room with mixed mode ventilation

Anuraghava

Abhiram

Reddy

et al. 2021

Int. J. Simul. Multidisci. Des. Optim.

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COVID-19 caused by severe acute respiratory syndrome (SARS) has accounted for huge collateral damage and as the virus is spreading faster and faster this study deals with isolation rooms or negative pressure rooms with 12 or more air changes per hour and maintaining a pressure difference of 2.5 pa which can help in reducing the transmission of the virus from affected to not affected persons. ANSI/ASHRAE/ASHE Standard 170–2008 recommendations are followed for hospital applications, to facilitate effective ventilation. These negative pressure rooms prevent the spread of the contaminated particles to the surroundings and by creating a negative pressure in the room whenever the door is opened the atmospheric air is sucked in and not the one which is present inside the room. The Computational fluid dynamics simulations are performed to investigate the diffusion of airbone virus inside a negative pressure room with mixed mode ventilation system. It was identified that the mixed mode ventilation system is more effective in controlling the spread of virus droplets inside the room

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“…Bioaerosols such as viruses, allergies, pathogens, dead or live bacteria, fungi, antigens, and others can be suspended and transported by a directional airflow pattern between a patient's room and neighboring facilities [9]. Several design parameters are required for the design process of a clean room, he listed this as Room dimension, Medical and non-medical equipment, Pressure, Air temperature, Air humidity, Air velocity, and the number of airborne particles [10]. Pressure management in a room and its surrounding vicinity is essential in implementing and maintaining negative air pressure in an isolation room.…”

mentioning

confidence: 99%

Negative Air Pressure Isolation Room for COVID-19 Patients in the Philippines: A Simulation of the Proposed Design using SolidWorks

Bustarde¹,

Cruz²,

Dayap³

et al. 2021

2021 IEEE 13th International Conference on Humanoid, Nanotechnology, Information Technology, Communication and Control, Environ

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Since the start of the 2019 pandemic, medical staff and non-medical staff are fighting on the front line in all hospitals worldwide. However, the possibility of healthcare workers' scarcity due to the increasing medical infection rate is ignored in many recent studies. To prevent such things to happen, the installation of a negative air pressure isolation room is proposed to Norzagaray Municipal Hospital (NMH). Primary parameters such as filtration, pressure management, and dilution ventilation were investigated in SOLIDWORKS simulation software by removing one parameter per simulation. Two existing schemes were simulated, and the primary parameters present were evaluated. Three ventilation design set-ups were designed and the effects of the varying placements of the primary parameters to the airflow pattern in a negative air pressure isolation room were determined. Cost-benefit analysis (CBA) was conducted to determine if the cost of installing the negative air pressure room outweighs its benefit. The set-up where the High efficiency particulate air (HEPA) machine is inside the room is proposed to NMH as this abides by the Department of Health (DOH) memorandum and standards on Airborne Infection Isolation Rooms (AIIRs) and is the most effective of the three set-ups. Results show that filtration filters the infectious particles, pressure management manages the proper airflow direction, and dilution ventilation makes sure there are enough air changes per hour to filter a percentage of infectious particles. In the existing schemes, all the primary parameters were used to contain the infectious particles in the room, however, the effectivity of the filtration also depends on the location of the patient, supply, and exhaust. The most significant effect of the varying placements of the primary parameters can be seen in filtration as only the set-up where the HEPA machine is inside the room was able to filter 100% of the infectious particles. It is also the most profitable ventilation design set-up with a 2.08 CBA ratio and has the least payback period of 5.8 months.

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Design of the ventilation system and the simulation of air flow in the negative isolation room using FloVent 8.2

Cited by 6 publications

References 1 publication

Behavior of cough droplets emitted from Covid-19 patient in hospital isolation room with different ventilation configurations

Behavior of cough droplets emitted from Covid-19 patient in hospital isolation room with different ventilation configurations

CFD modelling of airborne virus diffusion characteristics in a negative pressure room with mixed mode ventilation

Negative Air Pressure Isolation Room for COVID-19 Patients in the Philippines: A Simulation of the Proposed Design using SolidWorks

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