Results 11 to 20 of about 273,929 (243)

Numerical Evaluation of a Novel Vertical Drop Airflow System to Mitigate Droplet Transmission in Trains

open access: yesAtmosphere, 2022
Owing to the outbreak of COVID-19, researchers are exploring methods to prevent contact and non-contact infections that occur via multiple transmission routes.
Sungho Yun, Jae-Chul Kim
doaj   +1 more source

Hybrid Model for Forecasting Indoor CO2 Concentration

open access: yesBuildings, 2022
Indoor CO2 concentration is considered a metric of indoor air quality that affects the health of occupants. In this study, a hybrid model was developed for forecasting the varying indoor CO2 concentration levels in a residential apartment unit in the ...
Ki Uhn Ahn   +5 more
doaj   +1 more source

Effects of the Ventilation System by Using Jet Fans during a Fire in Road Tunnels

open access: yesApplied Sciences, 2023
People inside a road tunnel may be in grave danger if there is a fire. When a fire is developing, mechanical ventilation can be crucial in protecting occupants and facilitating the arrival of emergency crews.
Amir Nematollahi Sarvestani   +1 more
doaj   +1 more source

Exterior ventilation leakage test and reform of Fengchishan Coal Mine

open access: yesGong-kuang zidonghua, 2014
In view of status of serious exterior ventilation leakage of auxiliary inclined air returning shaft used for staff and material transportation in Fengchishan Coal Mine, wind meter direct measuring method was used to test mine exterior ventilation leakage
LU Zhongliang, YANG Nanke
doaj   +1 more source

Numerical Simulation of Airborne Disease Spread in Cage-Free Hen Housing with Multiple Ventilation Options

open access: yesAnimals, 2022
The current ventilation designs of poultry barns have been present deficiencies with respect to the capacity to protect against disease exposure, especially during epidemic events. An evolution of ventilation options is needed in the egg industry to keep
Long Chen   +4 more
doaj   +1 more source

Analyses and prevention of coal spontaneous combustion risk in gobs of coal mine during withdrawal period

open access: yesGeomatics, Natural Hazards & Risk, 2019
Coal spontaneous combustion (CSC) in gob causes notorious safety issues to workers, especially during withdrawal period. Withdrawal period was normally divided into three stages (initial stage, expanding back channel stage and equipment returning stage ...
Wan-Xing Ren, Qing Guo, Hui-Hui Yang
doaj   +1 more source

Machine Learning Techniques to Model and Predict Airflow Requirements in Underground Mining

open access: yesMaterials Proceedings, 2023
This paper analyzes the airflow requirements of underground operations and the accurate assessment of future conditions so as to effectively adjust ventilation parameters.
Maria Karagianni, Andreas Benardos
doaj   +1 more source

Effect of Indoor Green Walls on Environment Perception and Well-Being of Occupants in Office Buildings

open access: yesEnergies
Office employees often face discomfort due to dry air, impacting their productivity. Existing solutions like standalone humidifiers or HVAC-integrated systems are either inefficient or costly.
Aleksandra Lipczynska   +2 more
doaj   +1 more source

Analysis method of mine ventilation difficulty degree based on ventilation equivalent area

open access: yesGong-kuang zidonghua, 2020
In view of problems that equivalent orifice commonly used in current mine ventilation difficulty degree evaluation cannot effectively reflect details of ventilation difficulty degree, and ventilation resistance measurement cannot well measure effect of ...
WANG Yanping   +5 more
doaj   +1 more source

Optimisation of Heat Loss through Ventilation for Residential Buildings

open access: yesAtmosphere, 2018
This study presents the results of research on heat loss from various types of residential buildings through ventilation systems. Experimental research was done to analyse the effectiveness of ventilation systems of different types and determine the ...
Dariusz Suszanowicz
doaj   +1 more source

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