Measurement of the Air Chance Rate and Ventilation Characteristics During Short Term Transient Phenomena

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearch

Abstract

Different measurement procedures are available for the experimental assessment of air change rates inside ventilated enclosures. These mainly consist of tracer gas techniques and can usually be applied to steady-state or moderately transient conditions and when a continous mixing of the indoor air is assured throughout the test. However, due to the relatively slow response of the gas analysers, none of these procedures can usually be applied to fast transient phenomena that last 15 minutes or less. Moreover in many cases of natural ventilation strategies, the continuous mixing of the indoor air would compromise and interfere with the ongoing ventilation process. In this work, a modified tracer gas technique that is suitable to experimentally assess the transient features of the ventilation performances during these phenomena is proposed and tested for the case of buoyancy driven single-sided natural ventilation. The results are critically compared with the air flow rates assessed through anemometric measurements. The measurement features, limitations, shortcomings and uncertainties are also discussed.
Original languageEnglish
Title of host publicationProceedings of ROOMVENT 2004, 9th International Conference on Air Distribution in Rooms, September 5-8, 2004, Coimbra, Portugal
EditorsM. C. Gameiro Da Silva
Number of pages10
Publication date2004
ISBN (Print)972-97973-1-5
Publication statusPublished - 2004
EventMeasurement of the Air Chance Rate and Ventilation Characteristics During Short Term Transient Phenomena -
Duration: 19 May 2010 → …

Conference

ConferenceMeasurement of the Air Chance Rate and Ventilation Characteristics During Short Term Transient Phenomena
Period19/05/2010 → …

Keywords

  • Tracer Gas Techniques
  • Air Change Measurement
  • Natural Ventilation

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