On the accuracy and repeatability of the pulse and step- down tracer gas methods for measuring mean ages of air

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TypeArticle
Journal titleASHRAE Transactions
ISSN0001-2505
Volume101
Issue1
Pages239248; # of pages: 10
SubjectIndoor air
AbstractTests were conducted in a full-scale office room with internal heat loads and furnishings to analyze and estimate the accuracy and repeatability of the pulse and step-down tracer gas methods for measuring mean ages of air. It was found that the error band due to the combined effect of the limited accuracy and repeatability was wider for the pulse method than for the step-down method. An example is provided to illustrate how these results can be used to interpret the measurements of mean ages of air in evaluating the performance of ventilation systems.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
NotePresented at the ASHRAE Winter Meeting, 1995, in Chicago, IL, USA
Peer reviewedYes
IdentifierIRC-P-3256
NRC number36009
3867
NPARC number20375778
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Record identifier32877c61-3278-4032-b8bc-b0d04b874ec4
Record created2012-07-23
Record modified2016-05-09
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