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Abstract

Air flow rate in a naturally ventilated space is extremely difficult to measure due to the stochastic nature of wind, and as a consequence non-uniform and dynamic flow conditions.

This paper describes three different methods to measure the air flow in a full-scale outdoor test facility with a naturally ventilated double skin façade. In the first method, the air flow in the cavity is estimated on the basis of six measured velocity profiles. The second method is represented by constant injection of tracer gas and in the third method a measured relation in the laboratory is used to estimate the flow rate on the basis of continues measurement of the pressure difference between the surface pressure at the opening and inside pressure of the double skin façade.

Although all three measurement methods are difficult to use under such dynamic air flow conditions, two of them show reasonable agreement and can be used for experimental validation of numerical models of natural ventilation air flow.

Original languageEnglish
Title of host publicationProceedings of Roomvent 2007 : Helsinki 13-15 June 2007
EditorsOlli Seppänen, Jorma Säteri
Number of pages10
PublisherFINVAC ry
Publication date2007
ISBN (Electronic)9789529989812
Publication statusPublished - 2007
EventThe International Conference on Air Distribution in Rooms, Roomvent - Helsinki, Finland
Duration: 13 Jun 200715 Jun 2007
Conference number: 10

Conference

ConferenceThe International Conference on Air Distribution in Rooms, Roomvent
Number10
CountryFinland
CityHelsinki
Period13/06/200715/06/2007

Bibliographical note

PDF for print: 10 pp.

Keywords

  • Roomvent
  • The International Conference on Air Distribution in Rooms
  • Natural Ventilation
  • Air Flow Rate

Cite this

Kalyanova, O., Jensen, R. L., & Heiselberg, P. (2007). Measurement of Air Flow Rate in a Naturally Ventilated Double Skin Facade. In O. Seppänen, & J. Säteri (Eds.), Proceedings of Roomvent 2007: Helsinki 13-15 June 2007 FINVAC ry.
Kalyanova, Olena ; Jensen, Rasmus Lund ; Heiselberg, Per. / Measurement of Air Flow Rate in a Naturally Ventilated Double Skin Facade. Proceedings of Roomvent 2007: Helsinki 13-15 June 2007. editor / Olli Seppänen ; Jorma Säteri. FINVAC ry, 2007.
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title = "Measurement of Air Flow Rate in a Naturally Ventilated Double Skin Facade",
abstract = "Air flow rate in a naturally ventilated space is extremely difficult to measure due to the stochastic nature of wind, and as a consequence non-uniform and dynamic flow conditions. This paper describes three different methods to measure the air flow in a full-scale outdoor test facility with a naturally ventilated double skin fa{\cc}ade. In the first method, the air flow in the cavity is estimated on the basis of six measured velocity profiles. The second method is represented by constant injection of tracer gas and in the third method a measured relation in the laboratory is used to estimate the flow rate on the basis of continues measurement of the pressure difference between the surface pressure at the opening and inside pressure of the double skin fa{\cc}ade.Although all three measurement methods are difficult to use under such dynamic air flow conditions, two of them show reasonable agreement and can be used for experimental validation of numerical models of natural ventilation air flow.",
keywords = "Roomvent, The International Conference on Air Distribution in Rooms, Natural Ventilation, Air Flow Rate, Roomvent, The International Conference on Air Distribution in Rooms, Natural Ventilation, Air Flow Rate",
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language = "English",
editor = "Olli Sepp{\"a}nen and Jorma S{\"a}teri",
booktitle = "Proceedings of Roomvent 2007",
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}

Kalyanova, O, Jensen, RL & Heiselberg, P 2007, Measurement of Air Flow Rate in a Naturally Ventilated Double Skin Facade. in O Seppänen & J Säteri (eds), Proceedings of Roomvent 2007: Helsinki 13-15 June 2007. FINVAC ry, The International Conference on Air Distribution in Rooms, Roomvent, Helsinki, Finland, 13/06/2007.

Measurement of Air Flow Rate in a Naturally Ventilated Double Skin Facade. / Kalyanova, Olena; Jensen, Rasmus Lund; Heiselberg, Per.

Proceedings of Roomvent 2007: Helsinki 13-15 June 2007. ed. / Olli Seppänen; Jorma Säteri. FINVAC ry, 2007.

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

TY - GEN

T1 - Measurement of Air Flow Rate in a Naturally Ventilated Double Skin Facade

AU - Kalyanova, Olena

AU - Jensen, Rasmus Lund

AU - Heiselberg, Per

N1 - PDF for print: 10 pp.

PY - 2007

Y1 - 2007

N2 - Air flow rate in a naturally ventilated space is extremely difficult to measure due to the stochastic nature of wind, and as a consequence non-uniform and dynamic flow conditions. This paper describes three different methods to measure the air flow in a full-scale outdoor test facility with a naturally ventilated double skin façade. In the first method, the air flow in the cavity is estimated on the basis of six measured velocity profiles. The second method is represented by constant injection of tracer gas and in the third method a measured relation in the laboratory is used to estimate the flow rate on the basis of continues measurement of the pressure difference between the surface pressure at the opening and inside pressure of the double skin façade.Although all three measurement methods are difficult to use under such dynamic air flow conditions, two of them show reasonable agreement and can be used for experimental validation of numerical models of natural ventilation air flow.

AB - Air flow rate in a naturally ventilated space is extremely difficult to measure due to the stochastic nature of wind, and as a consequence non-uniform and dynamic flow conditions. This paper describes three different methods to measure the air flow in a full-scale outdoor test facility with a naturally ventilated double skin façade. In the first method, the air flow in the cavity is estimated on the basis of six measured velocity profiles. The second method is represented by constant injection of tracer gas and in the third method a measured relation in the laboratory is used to estimate the flow rate on the basis of continues measurement of the pressure difference between the surface pressure at the opening and inside pressure of the double skin façade.Although all three measurement methods are difficult to use under such dynamic air flow conditions, two of them show reasonable agreement and can be used for experimental validation of numerical models of natural ventilation air flow.

KW - Roomvent

KW - The International Conference on Air Distribution in Rooms

KW - Natural Ventilation

KW - Air Flow Rate

KW - Roomvent

KW - The International Conference on Air Distribution in Rooms

KW - Natural Ventilation

KW - Air Flow Rate

M3 - Article in proceeding

BT - Proceedings of Roomvent 2007

A2 - Seppänen, Olli

A2 - Säteri, Jorma

PB - FINVAC ry

ER -

Kalyanova O, Jensen RL, Heiselberg P. Measurement of Air Flow Rate in a Naturally Ventilated Double Skin Facade. In Seppänen O, Säteri J, editors, Proceedings of Roomvent 2007: Helsinki 13-15 June 2007. FINVAC ry. 2007