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Título
Proposal for a simplified CFD procedure for obtaining patterns of the age of air in outdoor spaces for the natural ventilation of buildings
Año del Documento
2017
Editorial
MDPI
Descripción
Producción Científica
Documento Fuente
Energies, 2017, vol. 10, n. 9, p. 1252
Abstract
Built urban environments modify the air quality of the natural ventilation processes in
buildings. The experimental assessment of outdoor air change (OACH) processes is complex due
to the air volumes involved. The quality of the OACH can be analysed through the ventilation
efficiency concept, which has been extensively studied in order to characterize the ventilation of
indoor spaces. Ventilation efficiency through the age-of-the-air concept assesses the air-change
capacity of a certain space. A procedure formulation for obtaining an adequate control domain (CD)
to evaluate outdoor air change efficiency (OACE) is proposed. A methodology in two phases is
presented: first, an evaluation stage, in which the outdoor air behaviour patterns are studied; then,
a second phase where an ideal control domain (ICD) is obtained in order to comparatively assess
several cases in similar urban environments. The outcomes determine a proposed ICD for evaluating
the design of efficiently ventilated buildings in open urban built environments. The methodology of
validation proposed simplifies the assessment of the building shape and its impact on the quality
of the OACH by the OACE. The suggested ICD has dimensions of L = 5H; D = 3H; and T = 2H.
ICD enables the representation of the air behaviour and fulfils the imposed requirements to evaluate
efficiency with a mean accuracy lower than 0.6%.
Materias Unesco
6201 Arquitectura
3305 Tecnología de la Construcción
Palabras Clave
Age of the outdoor air
Computational Fluid Dynamics (CFD) method
Ideal control domain
Wind profile
Indoor air quality
ISSN
1996-1073
Revisión por pares
SI
Patrocinador
Ministerio de Economía y Competitividad (under the Grant Agreement number BIA2015-64321-R)
Version del Editor
Propietario de los Derechos
© 2017 The Author(s)
Idioma
eng
Tipo de versión
info:eu-repo/semantics/publishedVersion
Derechos
openAccess
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