DBPapers
DOI: 10.5593/SGEM2015/B41/S17.076

THE STRATEGY OF VENTILATION IN RELATION TO CARBON DIOXIDE CONCENTRATION

R. Nagy, D. Kosicanova
Friday 25 September 2015 by Libadmin2015

References: 15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-38-4 / ISSN 1314-2704, June 18-24, 2015, Book4, 581-588 pp

ABSTRACT
The paper focuses on the natural ventilation research in space through windows. The various ventilation strategies were examined in relation to the number of open windows and ventilation geometry ergo air flow distribution. The numbers of chosen air flow distributions in space are 2. The first air distribution flow presents a simple ventilation distribution with one open window and the second is cross ventilation by 2 windows on opposite sides of the building envelope.
The measurements were performed for the purpose of monitoring of carbon dioxide (CO2) concentration decreasing, which is on value level over 1200ppm, to value level of 500ppm up to 530ppm in relation to speed of decline, thus a time duration of ventilation. The level of CO2 concentration exceeding the value 1200ppm represents values, which do not meet Code requirements of European standards STN EN 15251 and STN EN 13779. The considered CO2 concentrations of 500ppm up to 530ppm meet first category of European standards STN EN 15251 and also represent values at about 100ppm above background outside CO2 concentration. The measurements were performed by using of Testo 435 instrument and took 3 days.
The aim of the measurements was to determine the simple but effective strategy of ventilation for the operation of the apartment space and to achieve the Code values of CO2 concentration and thus for the purpose the indoor air quality improving. The obtained results can be applied to similar operations with a given number of occupants under the same conditions.

Keywords: air change, air ventilation rate, air infiltration, carbon dioxide (CO2) concentration, indoor air quality, experimental measurement, apartment flat.