Assessing the Targeting Aerosol Removal Efficacy and Energy Efficiency of Portable Air Cleaner in Negative Pressure Isolation Ward DOI
Jiaxin Zhang, Junjie Liu, Shihao Wen

et al.

Published: Jan. 1, 2024

During the COVID-19 pandemic, negative-pressure isolation wards (NPIWs) became a crucial infrastructure for treating patients and safeguarding healthcare workers (HCWs). However, standard requirements full fresh air high changes per hour (ACH) make NPIWs extremely energy-intensive. The blind ventilation design of also poses potential exposure risks HCWs. To address these issues, portable cleaners (PACs) have been proven effective in removing bioaerosols from air, providing clean delivery rate (CADR) without need additional load. In this study, validated CFD model was used to simulate dispersion exhaled aerosols within an NPIW. impact incorporating PACs on targeting aerosol removal, HCW passive risk, wall deposition rates, energy consumption assessed. evaluate removal capacity PACs, we propose novel indicator called "TARGETINGPAC". gain comprehensive understanding various strategies NPIWs, transient distribution three different ACHs with simulated, resulting total 8 cases. simulations revealed that ceiling supply return is not suitable NPIWs. introduction reversed trend increasing by 38.5%-62.5%. Furthermore, reduced viral load HCWs' body surfaces walls while improving efficiency 12.6%-31.1% winter summer.

Language: Английский

Why do ventilation strategies matter in controlling infectious airborne particles? A comprehensive numerical analysis in isolation ward DOI
Huiyi Tan, Keng Yinn Wong, Mohd Hafiz Dzarfan Othman

et al.

Building and Environment, Journal Year: 2023, Volume and Issue: 231, P. 110048 - 110048

Published: Jan. 26, 2023

Language: Английский

Citations

48
Particle dispersion for indoor air quality control considering air change approach: A novel accelerated CFD-DNN prediction DOI
Hong Yee Kek, Adib Bazgir, Huiyi Tan

et al.

Energy and Buildings, Journal Year: 2024, Volume and Issue: 306, P. 113938 - 113938

Published: Jan. 26, 2024

Language: Английский

Citations

16
A study on contaminant leakage from Airborne Infection Isolation room during medical staff entry; Implementation of walking motion on hypothetical human model in CFD simulation DOI Creative Commons
Seongmin Jo, Gihoon Kim, Minki Sung

et al.

Journal of Building Engineering, Journal Year: 2024, Volume and Issue: 86, P. 108812 - 108812

Published: Feb. 21, 2024

The recent outbreak of respiratory infectious diseases such as Middle East Respiratory Syndrome (MERS) and Coronavirus Disease-19 (COVID-19) highlights the critical role Air Infection Isolation (AII) rooms in preventing spread disease. However, risk contaminant leakage from AII room during medical staff interactions remains a significant challenge. This study advances our understanding by employing Computational Fluid Dynamics (CFD) simulations with novel approach. While CFD mitigate some limitations field experiments, measurement resolution variable changes, their accuracy is often limited oversimplification models, particularly representing human models movement. Unlike prior studies, we incorporate minimal simplification, featuring model Personal Protective Equipment (PPE) realistic walking motions. explores four distinct scenarios varied movements, offering comprehensive analysis airflow dispersion rooms. results indicated differences patterns distribution when motion was implemented model, opposed to simplified movement models. ranged 20.6 % 28.6 %, suggesting that studies may underestimate infection risks due oversimplified These findings underscore importance implementing motions for accurate assessment Additionally, opens pathways future research explore more complex clinical settings, enhancing control strategies.

Language: Английский

Citations

12
Numerical study of airflow pattern and bioaerosol dispersion during door motion in a negative pressure isolation ward DOI
Zongkun Li, Xiaoqian Ma, Yanfen Liao

et al.

Journal of Building Engineering, Journal Year: 2024, Volume and Issue: 89, P. 109351 - 109351

Published: April 17, 2024

Language: Английский

Citations

9
Ventilation strategies for mitigating airborne infection in healthcare facilities: A review and bibliometric analysis (1993–2022) DOI
Hong Yee Kek,

Syahmi Bazlisyam Mohd Saupi,

Huiyi Tan

et al.

Energy and Buildings, Journal Year: 2023, Volume and Issue: 295, P. 113323 - 113323

Published: June 28, 2023

Language: Английский

Citations

22
Spatial and temporal distribution of bioaerosols produced by patients with different postures in a negative pressure isolation ward under different ventilation modes DOI
Zongkun Li, Xiaoqian Ma, Yanfen Liao

et al.

Indoor and Built Environment, Journal Year: 2024, Volume and Issue: 33(5), P. 895 - 915

Published: Jan. 9, 2024

The high concentration of viral bioaerosols within the negative pressure isolation wards could pose a challenge to preventing potential cross-infection amongst healthcare workers (HCWs) and patients. Using Euler–Lagrange methodology, this study numerically simulated spatial temporal distribution characteristics in typical ward as well determined interaction ventilation mode patient posture on performance. removal effect particle groups produced by two respiratory behaviours (breathing coughing) was quantitatively analyzed, exhaust air ratio exchange rate discussed. results showed that migration bioaerosol particles were sensitive both pattern posture, which significant interactions. On basis, with best performance evaluated, showing 70–85%. Due initial momentum difference, diffusion behaviour cough breath not consistent, but optimizing airflow near outlet improve their efficiency meantime. Further studies found equal velocity facilitated aerosol particles, an appropriate increase also reduce content.

Language: Английский

Citations

5
Review on respiratory infectious disease transmission mechanism: effects of human movement and facemask use DOI Creative Commons
Jialin Wu,

Feifan He,

Zilin Xie

et al.

Emergency Management Science and Technology, Journal Year: 2024, Volume and Issue: 4(1), P. 0 - 0

Published: Jan. 1, 2024

Respiratory infectious diseases can cause public health emergencies, threatening human well-being, social operation, and economic development. Clarifying the transmission mechanism of respiratory is essential for control measures. We review main research findings on in recent decades. The source characteristics diseases, airborne mechanism, exposure susceptible persons, infection risk assessment methods are discussed. Given that dynamic scenario disease has attracted wide attention years, we summarize effects movement indoor airflow, pathogen diffusion, exposure. Considering everyday use facemasks, facemasks also Finally, future prospects proposed. be comprehensively explored by delving into patients' pathological personnel protection This exploration facilitated establishing a multi-pose manikin database, enabling personalized refined evaluations. Interdisciplinary cooperation will play pivotal role fostering holistic understanding. Furthermore, it crucial to account impact individuals' activity patterns dynamics. expected reference emergency management.

Language: Английский

Citations

4
Utilising localised exhaust and air curtain to reduce airborne particle settlement on surgical patients: potential future application in operating rooms? DOI
Huiyi Tan, Mohd Hafiz Dzarfan Othman, Hong Yee Kek

et al.

Journal of Thermal Analysis and Calorimetry, Journal Year: 2024, Volume and Issue: 149(19), P. 11323 - 11336

Published: April 23, 2024

Language: Английский

Citations

4
A CFD assessment on ventilation strategies in mitigating healthcare-associated infection in single patient ward DOI Creative Commons
Hong Yee Kek, Huiyi Tan, Desmond Daniel Chin Vui Sheng

et al.

Progress in Energy and Environment, Journal Year: 2023, Volume and Issue: 24(1), P. 35 - 45

Published: March 27, 2023

A promising ventilation strategy is an effective measure to enhance indoor air quality and protect the patients against healthcare-acquired infection. The Computational Fluid Dynamics (CFD) model represents a patient ward that was constructed using Computer-Aided Design (CAD) software. simulated results were verified validated based on published data. Renormalization Group (RNG) k-epsilon Eulerian approach used simulate airflow turbulence, while discrete phase (DPM) Lagrangian predict dispersion of airborne particles. This study examined four cases strategies, with varying rates, positioning supply diffusers, location exhaust grilles. revealed installation curtain jet coupled ceiling-mounted diffuser (case 3) above patient-occupying zone has highest wiping efficiency infectious utilization in case 3 managed reduce particle by approximately 3.3 times as compared baseline case. outcome also suggested grilles should be placed upper wall, ensure proper mixing fresh entire ward.

Language: Английский

Citations

10
The effect of airflow on HAIs risk in hospital: A review DOI Creative Commons

Ardjito Kristiawan,

Suhartono Suhartono,

Purwanto Adhipireno

et al.

E3S Web of Conferences, Journal Year: 2025, Volume and Issue: 605, P. 03021 - 03021

Published: Jan. 1, 2025

HAIs (Healthcare Associated Infections) are infections that acquired when a person (host) receives health services result in increased cost, extended Length Of Stay, and even death. This paper review way to reduced the risk of airborne transmission based on number journals management regulates incoming outgoing air eliminate or reduce infectious agents indoor incidence through care. Ensuring quality is good with sufficient ACH low AOA, so it safe for patients, staff, others who at care location.

Language: Английский

Citations

0