Fecha
2016
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info:eu-repo/semantics/openAccess
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Department of Civil Engineering, Aalborg University
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Resumen
This study aims to test how mixing ventilation combined with a hydronic radiant floor system performs removing airborne exhaled contaminants using two different air renovation rates. The two selected renovation rates are 2 ACH and 7.5 ACH. Temperature and velocity probes are used to evaluate temperature and velocity profiles in the room. A tracer gas (CO2) is used to measure the risk of cross infection between two breathing thermal manikins. One of the manikins (P) represents a lying person over a horizontal surface and its breathing represents the only source of contaminants into the chamber. The other one (HW) represents a standing person near P. The concentration of exhaled contaminants reaching its
breathing zone is studied. Temperature and air velocity profiles show that a nearly completely air stability situation is reached at the occupied zone. This stability is influenced by the air renovation rate performed. Tracer gas measurement results show a similar distribution of exhaled contaminants but with some discrepancies for both tests conducted. A higher tracer gas concentration reaches the nearby zone of HW manikin when the air renovation rate is increased from 2 to 7.5 ACH. This can lead to a higher cross infection rate. The obtained results suggest that that a higher ventilation rate not necessary leads to a decrease of the airborne cross infection risk for the occupants in an enclosed area.
Descripción
Categorías UNESCO
Palabras clave
airborne cross infection, breathing, hydronic radiant systems, ventilation
Citación
Berlanga, F. A., Olmedo, I., Ruiz de Adana, M., & Peci, F. (2016). Influence of the air renovation rate on the risk of cross infections in a hospital room with a combined radiant and mixing ventilation system. CLIMA 2016 - proceedings of the 12th REHVA World Congress, 1.
Centro
Facultades y escuelas::E.T.S. de Ingenieros Industriales
Departamento
Mecánica