Abstract
Age-of-air is a technique for evaluating ventilation that has been actively used for over 20 years. Age-of-air quantifies the time it takes for an elemental volume of outdoor air to reach a particular location or zone within the indoor environment. Age-of-air is often also used to quantify the ventilation effectiveness with respect to indoor air quality. In a purely single zone situation this use of age-of-air is straightforward, but application of age-of-air techniques in the general multizone environment has not been fully developed. This article looks at expanding those single-zone techniques to the more complicated environment of multizone buildings and in doing so develops further the general concept of age-of-air. The results of this analysis show that the nominal age-of-air, as often used, cannot be directly used for determining ventilation effectiveness unless specific assumptions are made regarding source distributions.The results herein will allow improved accuracy of age-of-air calculations in complex environments. The link between local age-of-air and ventilation effectiveness is hereby improved and the ability to use age-of-air measurement to estimate distribution effectiveness is increased. Use of these results will improve the design of future measurement efforts using tracer gases in multizone environments.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.