Impact of room heat load on ventilation effectiveness and probability of transmission of airborne diseases on the example of chosen scenarios DOI
Wojciech Cepiński, Paweł Szałański, Magdalena Orłowska

et al.

Journal of Building Engineering, Journal Year: 2024, Volume and Issue: unknown, P. 111606 - 111606

Published: Dec. 1, 2024

Language: Английский

Effectiveness of different ventilation strategies for mitigating airborne pathogen transmission in a multi-compartment dental clinic DOI

Guangpeng Yao,

Huijuan Xu, Haiyang Liu

et al.

Journal of Building Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 112692 - 112692

Published: April 1, 2025

Language: Английский

Citations

0
PIV experimental study on natural convective flows at high Rayleigh numbers in industrial buildings DOI Creative Commons
Jinyu Liu, Junjie Liu, Jiayu Li

et al.

Building and Environment, Journal Year: 2024, Volume and Issue: 256, P. 111460 - 111460

Published: March 28, 2024

High heat loads in industrial buildings potentially form strong natural convective flows. These flows exhibit significant unsteadiness and anisotropy, which can profoundly impact indoor air distribution. To study the flow characteristics of thermal large spaces, we built a large-scale test bench with controllable boundaries. Under three different source intensities represented by Rayleigh numbers (Ra = 3 × 1010, 6 1 1011) that are typical buildings, used 2-dimensional particle image velocimetry to capture airflow splicing nine subregions, each 800 instantaneous fields sampled at frequency Hz. The results show exhibited circulation patterns. velocity near wall gradually increased Ra number, while center remained low. turbulence intensity was less than 1, larger 5 fluctuated greatly. dominant fluctuation under high 0.1 Through proper orthogonal decomposition, it is found even for horizontal flows, main transient fluctuations still an up-and-down fluctuating structure. Additionally, calculation structure function revealed anisotropic, isotropic. Reynolds number generated vertical temperature differences exhibits power relationship number. This provides basis optimization distribution design buildings.

Language: Английский

Citations

3
Numerical optimization and experimental study of an active chilled beam with high entrainment efficiency DOI
Shihao Wen, Junjie Liu, Jiaxin Zhang

et al.

Applied Thermal Engineering, Journal Year: 2024, Volume and Issue: 255, P. 123971 - 123971

Published: July 17, 2024

Language: Английский

Citations

1
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

Citations

0
SO2 removal performance and breakthrough prediction of activated carbon-based chemical filters for electronics cleanroom air purification DOI
Yijun Pan, Jingjing Pei

Building and Environment, Journal Year: 2024, Volume and Issue: 266, P. 112042 - 112042

Published: Sept. 2, 2024

Language: Английский

Citations

0
Optimization design method for components parameter in space station ventilation system based on Flowmaster simulation DOI
Wenzhe Shang, Tianyu Zhao, Hejiang Sun

et al.

Building Simulation, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 27, 2024

Language: Английский

Citations

0
Impact of room heat load on ventilation effectiveness and probability of transmission of airborne diseases on the example of chosen scenarios DOI
Wojciech Cepiński, Paweł Szałański, Magdalena Orłowska

et al.

Journal of Building Engineering, Journal Year: 2024, Volume and Issue: unknown, P. 111606 - 111606

Published: Dec. 1, 2024

Language: Английский

Citations

0