DBPapers
DOI: 10.5593/sgem2012/s18.v4010

INDOOR AIR QUALITY RELATED TO TOTAL MINIMUM AIR VENTILATION RATE, AIR QUALITY AND CFD SIMULATIONS OF POLLUTION DISTRIBUTION

R. NAGY, D. KOSICANOVA
Wednesday 1 August 2012 by Libadmin2012

References: 12th International Multidisciplinary Scientific GeoConference, www.sgem.org, SGEM2012 Conference Proceedings/ ISSN 1314-2704, June 17-23, 2012, Vol. 4, 529 - 536 pp

ABSTRACT

The air ventilation rates defined in Standard STN EN 15 251:2007 present air change
rate in which the objective benefit of proper selection of ventilation system and air
distribution scheme is lost (erased) in relation to IAQ [1,2]. With help of sensory
evaluation in research the total minimum ventilation rate was estimated. It was reason
how to determine major boundary condition (air quantity = air ventilation rate) for
minimizing of responsibility size of air quantity (quantitative component of ventilation)
and maximize the impact of the choice of distribution scheme and the distribution
element (qualitative component of ventilation) for transfer and distribution of pollutants
in research. The total air ventilation rate for next experimental measurements was
established as the intersection of three air ventilation rates according to research
harmonogram. This air ventilation rate was necessary to supply to occupant to
experimental classroom and also as input value to CFD simulations. Within the frame of
air infiltration measurements (Description: older research, air infiltration quantification,
500 measurements for 6 categories of building types) that is presented in this paper, this
value of air infiltration was determinated for an experimental classroom
(Type of Buildings - Schools) at value level nINF=0,3[1/h] respectively qINF=16[litre/s].
It is average air infiltration value for Schools Buildings [3,4]. It was necessary to
ensured increased air ventilation rate nMECH=1,0[1/h] respectively qMECH=53,3[litre/s] by
mechanical ventilation system. These values were used and reflected in the
experimental measurements and CFD simulations.

Keywords: Air ventilation rate, infiltration, mechanical ventilation, CFD simulations,
experimental measurements, ventilation system, air distribution scheme, mixing
ventilation, displacement ventilation, confluent ventilation, personal ventilation, air
distribution index, carbon dioxide