On the Use of Hot-Sphere Anemometers in a Highly Transient Flow in a Double-Skin Facade

Rasmus Lund Jensen, Olena Kalyanova, Carl-Erik Hyldgård

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Abstract

Hot-sphere anemometers are widely used for measurement of air velocity in the occupied zone. In this paper, the ability of hot-sphere anemometers to measure transient flow in a double-skin façade is investigated. When hot-spheres are used in a double-skin façade, the conditions are very different from the measurement of air velocity in the occupied zone. The velocity is higher and the flow is more transient, the anemometer is subjected to high loads of direct solar radiation and wide temperature ranges and, finally, the direction of the flow is important.

The flow in the double-skin façade is highly transient and therefore, the dynamic properties of the hot-sphere anemometer must be investigated. An experimental setup to measure the dynamic property using a jet-wind tunnel and a device for moving the anemometer is described. The experimental setup allows examination of the standard deviation measured by the anemometer.

Temperature compensation is the working principle of anemometers. The ability to compensate for different temperatures when exposed to solar radiation is investigated in a controlled environment using a powerful lamp as a radiant heat source.

In the double-skin façade, both upward and downward flow will occur and therefore, it is important to determine the direction of the flow. A simple method using two hot-sphere anemometers separated by a small plate is discussed.

Original languageEnglish
Title of host publicationProceedings of Roomvent 2007 : Helsinki 13-15 June 2007
EditorsOlli Seppänen, Jorma Säteri
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

Fingerprint

Facades
Anemometers
Skin
Solar radiation
Air
Electric lamps
Temperature
Wind tunnels

Bibliographical note

Published on a CD

PDF for print: 10 pp.

Keywords

  • Roomvent
  • The International Conference on Air Distribution in Rooms
  • Air Velocity
  • Hot-Sphere Anemometers

Cite this

Jensen, R. L., Kalyanova, O., & Hyldgård, C-E. (2007). On the Use of Hot-Sphere Anemometers in a Highly Transient Flow in a Double-Skin Facade. In O. Seppänen, & J. Säteri (Eds.), Proceedings of Roomvent 2007: Helsinki 13-15 June 2007 FINVAC ry.
Jensen, Rasmus Lund ; Kalyanova, Olena ; Hyldgård, Carl-Erik. / On the Use of Hot-Sphere Anemometers in a Highly Transient Flow in a 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 = "On the Use of Hot-Sphere Anemometers in a Highly Transient Flow in a Double-Skin Facade",
abstract = "Hot-sphere anemometers are widely used for measurement of air velocity in the occupied zone. In this paper, the ability of hot-sphere anemometers to measure transient flow in a double-skin fa{\cc}ade is investigated. When hot-spheres are used in a double-skin fa{\cc}ade, the conditions are very different from the measurement of air velocity in the occupied zone. The velocity is higher and the flow is more transient, the anemometer is subjected to high loads of direct solar radiation and wide temperature ranges and, finally, the direction of the flow is important.The flow in the double-skin fa{\cc}ade is highly transient and therefore, the dynamic properties of the hot-sphere anemometer must be investigated. An experimental setup to measure the dynamic property using a jet-wind tunnel and a device for moving the anemometer is described. The experimental setup allows examination of the standard deviation measured by the anemometer.Temperature compensation is the working principle of anemometers. The ability to compensate for different temperatures when exposed to solar radiation is investigated in a controlled environment using a powerful lamp as a radiant heat source.In the double-skin fa{\cc}ade, both upward and downward flow will occur and therefore, it is important to determine the direction of the flow. A simple method using two hot-sphere anemometers separated by a small plate is discussed.",
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Jensen, RL, Kalyanova, O & Hyldgård, C-E 2007, On the Use of Hot-Sphere Anemometers in a Highly Transient Flow in a 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.

On the Use of Hot-Sphere Anemometers in a Highly Transient Flow in a Double-Skin Facade. / Jensen, Rasmus Lund; Kalyanova, Olena; Hyldgård, Carl-Erik.

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

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T1 - On the Use of Hot-Sphere Anemometers in a Highly Transient Flow in a Double-Skin Facade

AU - Jensen, Rasmus Lund

AU - Kalyanova, Olena

AU - Hyldgård, Carl-Erik

N1 - Published on a CD PDF for print: 10 pp.

PY - 2007

Y1 - 2007

N2 - Hot-sphere anemometers are widely used for measurement of air velocity in the occupied zone. In this paper, the ability of hot-sphere anemometers to measure transient flow in a double-skin façade is investigated. When hot-spheres are used in a double-skin façade, the conditions are very different from the measurement of air velocity in the occupied zone. The velocity is higher and the flow is more transient, the anemometer is subjected to high loads of direct solar radiation and wide temperature ranges and, finally, the direction of the flow is important.The flow in the double-skin façade is highly transient and therefore, the dynamic properties of the hot-sphere anemometer must be investigated. An experimental setup to measure the dynamic property using a jet-wind tunnel and a device for moving the anemometer is described. The experimental setup allows examination of the standard deviation measured by the anemometer.Temperature compensation is the working principle of anemometers. The ability to compensate for different temperatures when exposed to solar radiation is investigated in a controlled environment using a powerful lamp as a radiant heat source.In the double-skin façade, both upward and downward flow will occur and therefore, it is important to determine the direction of the flow. A simple method using two hot-sphere anemometers separated by a small plate is discussed.

AB - Hot-sphere anemometers are widely used for measurement of air velocity in the occupied zone. In this paper, the ability of hot-sphere anemometers to measure transient flow in a double-skin façade is investigated. When hot-spheres are used in a double-skin façade, the conditions are very different from the measurement of air velocity in the occupied zone. The velocity is higher and the flow is more transient, the anemometer is subjected to high loads of direct solar radiation and wide temperature ranges and, finally, the direction of the flow is important.The flow in the double-skin façade is highly transient and therefore, the dynamic properties of the hot-sphere anemometer must be investigated. An experimental setup to measure the dynamic property using a jet-wind tunnel and a device for moving the anemometer is described. The experimental setup allows examination of the standard deviation measured by the anemometer.Temperature compensation is the working principle of anemometers. The ability to compensate for different temperatures when exposed to solar radiation is investigated in a controlled environment using a powerful lamp as a radiant heat source.In the double-skin façade, both upward and downward flow will occur and therefore, it is important to determine the direction of the flow. A simple method using two hot-sphere anemometers separated by a small plate is discussed.

KW - Roomvent

KW - The International Conference on Air Distribution in Rooms

KW - Air Velocity

KW - Hot-Sphere Anemometers

KW - Roomvent

KW - The International Conference on Air Distribution in Rooms

KW - Air Velocity

KW - Hot-Sphere Anemometers

M3 - Article in proceeding

BT - Proceedings of Roomvent 2007

A2 - Seppänen, Olli

A2 - Säteri, Jorma

PB - FINVAC ry

ER -

Jensen RL, Kalyanova O, Hyldgård C-E. On the Use of Hot-Sphere Anemometers in a Highly Transient Flow in a Double-Skin Facade. In Seppänen O, Säteri J, editors, Proceedings of Roomvent 2007: Helsinki 13-15 June 2007. FINVAC ry. 2007