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

Jianshun S. Zhang, Chia Y. Shaw, Robert J. Magee

Research output: Contribution to journalConference article

2 Scopus citations

Abstract

Tests 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.

Original languageEnglish (US)
Pages (from-to)239-248
Number of pages10
JournalASHRAE Transactions
Issue number1
StatePublished - 1995
EventProceedings of the 1995 ASHRAE Annual Meeting - Chicago, IL, USA
Duration: Jan 29 1995Feb 1 1995

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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