The work was concerned with measuring natural convection through a large horizontal opening between two rooms in a building. Airflow rates between the two rooms were measured using a tracer-gas decay technique. Room 1 was heated to various temperatures in the range l8°C to 33°C using thermostatically-controlled heaters. Room 2 was unheated. A multi-point sampling unit was used to collect tracer-gas samples from each room. The concentration of SF6 tracer was measured using an infra-red gas analyser. The heat and mass flow rates between the two rooms were calculated from the tracer-gas concentrations and temperature differences. The coefficient of discharge of the opening was found to be function of the temperature difference between the two rooms.
Evaluation of heat and mass transfer through a large horizontal opening.
![](https://www.aivc.org/sites/default/files/default_images/default_image_5.png)
Year:
1994
Languages: English | Pages: 18 pp
Bibliographic info:
UK, University of Nottingham, School of Architecture, Building Group, 1994