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Fractal nature of regional ventilation distribution
Journal of Applied Physiology, 2000High-resolution measurements of pulmonary perfusion reveal substantial spatial heterogeneity that is fractally distributed. This observation led to the hypothesis that the vascular tree is the principal determinant of regional blood flow. Recent studies using aerosol deposition show similar ventilation heterogeneity that is closely correlated with ...
W A, Altemeier, S, McKinney, R W, Glenny
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Performance of ventilator components for natural ventilation applications
Building and Environment, 2006Abstract This paper describes a series of laboratory experiments that investigated the airflow interactions that take place between components in louvered ventilators. The context of the work was to improve the design and performance of ventilators used in natural ventilation systems in buildings.
Steve Sharples, Nelson Chilengwe
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Natural and Mechanical Ventilation
1996It is a well-known fact that hot air rises and that its place is then taken up by colder air. This natural effect occurs because the density (mass/unit volume) of the rising column of hot air is less than that of the falling column of cold air. This process in its continuously operating mode is encountered in any naturally vented enclosure and also in ...
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Predicting natural ventilation performance using ventilation effectiveness
The challenge of mitigating climate change by reducing carbon emissions means efforts are required to move away from carbon intensive practices to low/zero carbon alternatives.Natural ventilation allows the internal environment of buildings to be regulated without the carbon footprint associated with mechanical ventilation.openaire +1 more source
Ventilation shaft to increase effectiveness of natural ventilation
2012Ventilation shafts can aid natural ventilation in buildings. Natural ventilation provides ventilation for occupants that can provide thermal comfort conditions. This study attempts to increase air flow rates, which can provide thermal comfort conditions, in occupant spaces of a low rise commercial building by using a ventilation shaft.
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Harnessing natural ventilation benefits.
Health estate, 2013Making sure that a healthcare establishment has a good supply of clean fresh air is an important factor in keeping patients, staff, and visitors, free from the negative effects of CO2 and other contaminants. John O'Leary of Trend Controls, a major international supplier of building energy management solutions (BEMS), examines the growing use of natural
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