The indoor air quality management of the railroad passenger cabin is a hot environmental issue inmany countries. Especially, particulate matters are known to be harmful for lung and bronchus, andhigh concentration of carbon dioxide may cause headache and dizziness. Therefore, new regulation tolimit the particulate matters and carbon dioxide concentrations in the railroad passenger cabin is underpreparation in Korea. In this study, a new concept of an integrated novel air cleaning system for railroadpassenger cabin was suggested.
Ultraviolet germicidal irradiation (UVGI) uses UVC radiation produced by low pressure Hg vapor lampsto control biological air contaminants. Lamp UV output depends on multiple factors, includingaccumulated operating time (age) and the thermal effects of ambient air temperature and velocity.Additionally, the life of some lamp types depends on the frequency of on-off cycles.
This paper is concerned with a building situated in the west of Scotland which faces severe weatherconditions with high wind speeds and driving rain occurring frequently. This results in extensivedamage to the building fabric, and affects the internal climate which leads to a serious issue in buildingconstruction. In this study, a three-dimensional numerical model of airflow around the building isinvestigated. This investigation is part of ongoing research on wind-driven rain which has establishedthe importance of moisture stresses, wind flow and rain impacts on a commercial building.
The purpose of this investigation is to know the long term characteristics of VOC concentrations inhouses built before the building code in 2003 and to know the need of the countermeasures in thehouses were already built for example the improvement of the living habit, ventilation and buildingmaterials. The concentrations of VOCs were measured in these houses from 2000 to 2005. The resultsshowed that the concentration of formaldehyde decreased in the first year. After that the decline of theconcentration became invisible and the concentration changed only with the temperature.
Korean residential buildings have been airtight due to the energy economization plan since 1970’s energy crisis. As a result of this, the residential buildings have faced lack of ventilation and resulted in poor indoor air quality of buildings. In additio
The indoor air quality of railroad passenger cabin is often polluted by various pollutants. The pollutantssources of the passenger cabin are the passengers with their belongings, the inflowing outdoor air, andthe interior materials like floorings, seats, paints, and adhesives. In this study, we focused on thepollutants emissions from the interior materials, and carried out the characterization of emitted volatileorganic compound (VOC) in an environmental chamber. We could find out that a large amount ofvarious VOCs emitted from the surface of interior materials.
The indoor air quality management of the public places is gaining wide attention in Korea, because theindoor air quality of the public places are obliged to satisfy the guidelines suggested by Korean Ministryof Environment. According to this regulation, the railroad stations are regarded as public places whilethe passenger cabin of train is excluded. However, because the passengers spend more time in thepassenger cabin than in the stations, the indoor air quality management of the passenger cabin is moreimportant.
The aim of the study is to quantify the traffic generated particle number concentration levels (PM2.5; PMwith diameter ? 2.5?m) at various heights of a typical high-rise building in close proximity to a majorexpressway in Singapore. A 22-storey naturally-ventilated high-rise residential building located about15m away from a major expressway was selected for the study.
Until the end of 90-ties all dwelling buildings in Latvia were equipped with mandatory natural ventilationsystems with stack effect. Nowadays in many cases in dwellings there are only exhaust mechanicalventilation but air tight windows prevent natural air intake. Such systems result in bad IAQ.
Airflow characteristics in ventilated and air-conditioned spaces play an important role to attain comfort and hygiene conditions. This paper utilizes a 3D Computational Fluid Dynamics (CFD) model to assess the airflow characteristics in ventilated and air-conditioned archeological tombs of Egyptian Kings in the Valley of the Kings in Luxor, Egypt.
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