A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effects of air relative humidity and ventilation rate on particle concentrations within a reduced-scale room
https://orcid.org/0000-0002-9514-4351
An improved understanding of particle movement in ventilated rooms would help reduce airborne disease transmission in healthcare facilities. More empirical data are needed on the movement of small particles in rooms to investigate effects of air relative humidity (RH) and air exchange rates. In this study, small particles were injected into a reduced-scale room, and the particulate mass (PM) concentrations were measured at 12 interior locations in the room as well as at the ventilation air exhaust. The particulates were certified 'plain surface' melamine (polymethylenemelamine) microspheres (1.51 g cm−3 density; 1.98 µm diameter) with hydrophilic surfaces. Experiments were conducted using three conditions of ventilation rate (4, 6 and 8 air changes h−1 (ACH)) and two RH levels (35% and 70%). Increasing the ventilation rate did not significantly decrease PM concentrations in the interior room area, but significantly decreased exhaust air PM concentrations. RH did not affect room PM concentrations for any of the ventilation rates. RH did not affect exhaust air PM concentrations for the 4 ACH or 8 ACH ventilation rates, but the exhaust air PM concentrations were higher at low RH than at high RH for 6 ACH. Regardless of ventilation rate and RH, PM concentrations were uniform throughout the room interior (potentially occupied) zone.
Effects of air relative humidity and ventilation rate on particle concentrations within a reduced-scale room
https://orcid.org/0000-0002-9514-4351
An improved understanding of particle movement in ventilated rooms would help reduce airborne disease transmission in healthcare facilities. More empirical data are needed on the movement of small particles in rooms to investigate effects of air relative humidity (RH) and air exchange rates. In this study, small particles were injected into a reduced-scale room, and the particulate mass (PM) concentrations were measured at 12 interior locations in the room as well as at the ventilation air exhaust. The particulates were certified 'plain surface' melamine (polymethylenemelamine) microspheres (1.51 g cm−3 density; 1.98 µm diameter) with hydrophilic surfaces. Experiments were conducted using three conditions of ventilation rate (4, 6 and 8 air changes h−1 (ACH)) and two RH levels (35% and 70%). Increasing the ventilation rate did not significantly decrease PM concentrations in the interior room area, but significantly decreased exhaust air PM concentrations. RH did not affect room PM concentrations for any of the ventilation rates. RH did not affect exhaust air PM concentrations for the 4 ACH or 8 ACH ventilation rates, but the exhaust air PM concentrations were higher at low RH than at high RH for 6 ACH. Regardless of ventilation rate and RH, PM concentrations were uniform throughout the room interior (potentially occupied) zone.
Effects of air relative humidity and ventilation rate on particle concentrations within a reduced-scale room
https://orcid.org/0000-0002-9514-4351
An improved understanding of particle movement in ventilated rooms would help reduce airborne disease transmission in healthcare facilities. More empirical data are needed on the movement of small particles in rooms to investigate effects of air relative humidity (RH) and air exchange rates. In this study, small particles were injected into a reduced-scale room, and the particulate mass (PM) concentrations were measured at 12 interior locations in the room as well as at the ventilation air exhaust. The particulates were certified 'plain surface' melamine (polymethylenemelamine) microspheres (1.51 g cm−3 density; 1.98 µm diameter) with hydrophilic surfaces. Experiments were conducted using three conditions of ventilation rate (4, 6 and 8 air changes h−1 (ACH)) and two RH levels (35% and 70%). Increasing the ventilation rate did not significantly decrease PM concentrations in the interior room area, but significantly decreased exhaust air PM concentrations. RH did not affect room PM concentrations for any of the ventilation rates. RH did not affect exhaust air PM concentrations for the 4 ACH or 8 ACH ventilation rates, but the exhaust air PM concentrations were higher at low RH than at high RH for 6 ACH. Regardless of ventilation rate and RH, PM concentrations were uniform throughout the room interior (potentially occupied) zone.
Effects of air relative humidity and ventilation rate on particle concentrations within a reduced-scale room
Yang, Tsz Yi (author) / Riskowski, Gerald L. (author) / Chang, Audrey Ching-Zu (author)
Indoor and Built Environment ; 28 ; 335-344
2019-03-01
10 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2015
Ventilation and Humidity Within Museums
| British Library Conference Proceedings | 1995
Particulate concentrations within a reduced-scale room operated at various air exchange rates
| British Library Online Contents | 2013
Particulate concentrations within a reduced-scale room operated at various air exchange rates
| Online Contents | 2013