Single-sided natural ventilation driven by wind pressure and temperature difference

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

140 Citationer (Scopus)

Resumé

Even though opening a window for ventilation of a room seems very simple, the flow that occurs in this situation is rather complicated. The amount of air going through the window opening will depend on the wind speed near the building, the temperatures inside and outside the room, the wind direction, the turbulence characteristics in the wind and the pressure variations caused by e.g. wind gusts. Finally, it also depends on the size, type and location of the opening. Many of these parameters are unsteady which makes the calculation of air-change rates even more complicated. In this work, full-scale wind tunnel experiments have been made with the aim of making a new expression for calculation of the airflow rate in single-sided natural ventilation. During the wind tunnel experiments it was found that the dominating driving force differs between wind speed and temperature difference depending on the ratio between the forces and the wind direction. This change is also found in the velocity profiles measured in the opening, which might change from wind dominated to temperature dominated under the same wind direction but with increasing temperature difference.
OriginalsprogEngelsk
TidsskriftEnergy and Buildings
Vol/bind40
Udgave nummer6
Sider (fra-til)1031–1040
ISSN0378-7788
DOI
StatusUdgivet - 17 aug. 2008

Fingerprint

Ventilation
Temperature
Wind tunnels
Air
Turbulence
Experiments

Citer dette

@article{65f6fb40554d11dcab46000ea68e967b,
title = "Single-sided natural ventilation driven by wind pressure and temperature difference",
abstract = "Even though opening a window for ventilation of a room seems very simple, the flow that occurs in this situation is rather complicated. The amount of air going through the window opening will depend on the wind speed near the building, the temperatures inside and outside the room, the wind direction, the turbulence characteristics in the wind and the pressure variations caused by e.g. wind gusts. Finally, it also depends on the size, type and location of the opening. Many of these parameters are unsteady which makes the calculation of air-change rates even more complicated. In this work, full-scale wind tunnel experiments have been made with the aim of making a new expression for calculation of the airflow rate in single-sided natural ventilation. During the wind tunnel experiments it was found that the dominating driving force differs between wind speed and temperature difference depending on the ratio between the forces and the wind direction. This change is also found in the velocity profiles measured in the opening, which might change from wind dominated to temperature dominated under the same wind direction but with increasing temperature difference.",
keywords = "Single-sided natural ventilation, Air-change rate, Measurements, Wind tunnel",
author = "Larsen, {Tine Steen} and Per Heiselberg",
year = "2008",
month = "8",
day = "17",
doi = "doi:10.1016/j.enbuild.2006.07.012",
language = "English",
volume = "40",
pages = "1031–1040",
journal = "Energy and Buildings",
issn = "0378-7788",
publisher = "Elsevier",
number = "6",

}

Single-sided natural ventilation driven by wind pressure and temperature difference. / Larsen, Tine Steen; Heiselberg, Per.

I: Energy and Buildings, Bind 40, Nr. 6, 17.08.2008, s. 1031–1040.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Single-sided natural ventilation driven by wind pressure and temperature difference

AU - Larsen, Tine Steen

AU - Heiselberg, Per

PY - 2008/8/17

Y1 - 2008/8/17

N2 - Even though opening a window for ventilation of a room seems very simple, the flow that occurs in this situation is rather complicated. The amount of air going through the window opening will depend on the wind speed near the building, the temperatures inside and outside the room, the wind direction, the turbulence characteristics in the wind and the pressure variations caused by e.g. wind gusts. Finally, it also depends on the size, type and location of the opening. Many of these parameters are unsteady which makes the calculation of air-change rates even more complicated. In this work, full-scale wind tunnel experiments have been made with the aim of making a new expression for calculation of the airflow rate in single-sided natural ventilation. During the wind tunnel experiments it was found that the dominating driving force differs between wind speed and temperature difference depending on the ratio between the forces and the wind direction. This change is also found in the velocity profiles measured in the opening, which might change from wind dominated to temperature dominated under the same wind direction but with increasing temperature difference.

AB - Even though opening a window for ventilation of a room seems very simple, the flow that occurs in this situation is rather complicated. The amount of air going through the window opening will depend on the wind speed near the building, the temperatures inside and outside the room, the wind direction, the turbulence characteristics in the wind and the pressure variations caused by e.g. wind gusts. Finally, it also depends on the size, type and location of the opening. Many of these parameters are unsteady which makes the calculation of air-change rates even more complicated. In this work, full-scale wind tunnel experiments have been made with the aim of making a new expression for calculation of the airflow rate in single-sided natural ventilation. During the wind tunnel experiments it was found that the dominating driving force differs between wind speed and temperature difference depending on the ratio between the forces and the wind direction. This change is also found in the velocity profiles measured in the opening, which might change from wind dominated to temperature dominated under the same wind direction but with increasing temperature difference.

KW - Single-sided natural ventilation

KW - Air-change rate

KW - Measurements

KW - Wind tunnel

U2 - doi:10.1016/j.enbuild.2006.07.012

DO - doi:10.1016/j.enbuild.2006.07.012

M3 - Journal article

VL - 40

SP - 1031

EP - 1040

JO - Energy and Buildings

JF - Energy and Buildings

SN - 0378-7788

IS - 6

ER -