UNLABELLED Multizone network models employ several assumptions, such as uniform temperature and pressure and quiescent air inside a zone, which may lead to inaccurate results in flow calculations. These assumptions can be eliminated in the zones, where the assumptions are inappropriate, by coupling a multizone network program with a computational fluid dynamics (CFD) program. Through theoretica...

the state of works of art exhibited inside museums can be strongly influenced by indoor air quality, due to chemical activity of gaseous pollutants and particulate matter. for that reason it is important to carry out periodic air quality controls to check if the concentration levels of air pollutants comply with the limits specified by the national laws. in this work we show results obtained in...

Night ventilation methods have been used in educational buildings to guarantee indoor air quality at the beginning of occupied periods. A typical method has pre-start 2 h before space usage. Another selection ventilate a building continuously during night with minimum airflow rate that can dilute material emissions. In this study, pre-started, continuous, and intermittent were compared by asses...

Abstract For efficient land use, the majority of large-scale buildings constructed in large cities are multi-story underground parking lots. The ventilation system is installed to improve indoor air quality lots, but if main fan for supply or exhaust and induction wrong place, performance will suffer. purpose this study was assess on B1F lot connected ramp, as well analyze characteristics airfl...

The study presented in this work is performed a virtual chamber, similar to an existing experimental with dimensions of 4.50×2.55×2.50 m 3 . occupied twelve manikins, equipped six tables, chairs, one exhaust system and inlet system, based confluents jets system. In the are considered air ducts, located above head level, connected ceiling area. four vertical 0.15 diameter, on corners consecutive...

This study measured ventilation volumes and particle concentrations in indoor environments with open windows doors. In addition, the effect of airflow mode air conditioner on volume concentration variations was also measured. The fan could only provide approximately 43% during design phase. amount differed depending opening area increased by multiple or doors, even when same. No significant cha...

The distribution of indoor formaldehyde concentration is affected by many factors, which makes the in different positions uneven, has a negative impact on monitoring accuracy. Firstly, through orthogonal experiment and numerical simulation, it determined that airflow organization location pollution source have great influence Further research found relative position air supply diffusion room. T...

The goal of this study was to investigate the effectiveness of stand-alone modular air purification systems in improving air quality in dental practices, hospital and laboratory environments. As air pollutant make-up and concentration may vary significantly in different indoor environments, the air cleaning technologies utilised should be optimised for the pollutants targeted in a particular en...