Abstract
Ventilation effectiveness is strongly dependent on room air movement and contaminant source location. It is shown that there exist gradients in contaminant distribution in the room in case of mixing ventilation and this will give rise to effectiveness different from 1.0. It is also shown that the location of the return openings may be very important compared with the small influence this location has on the velocity distribution in the room. The air flow rate in a room is often at a level where low turbulence effect takes place and the ventilation effectiveness and the velocity distribution are strongly influenced by this effect. It is shown how the temperature gradient and the temperature effectiveness are dependent on the location and type of heat sources in displacement ventilation. Concentration distribution and ventilation effectiveness are studied in a room with both stationary sources and moveable sources. The paper shows a description of the flow from a low level diffuser which is suitable for a design procedure in displacement ventilation. (au) (20 refs.)
Citation Formats
Nielsen, P V.
Air distribution Systems - room air movement and ventilation effectiveness.
Denmark: N. p.,
1992.
Web.
Nielsen, P V.
Air distribution Systems - room air movement and ventilation effectiveness.
Denmark.
Nielsen, P V.
1992.
"Air distribution Systems - room air movement and ventilation effectiveness."
Denmark.
@misc{etde_10124709,
title = {Air distribution Systems - room air movement and ventilation effectiveness}
author = {Nielsen, P V}
abstractNote = {Ventilation effectiveness is strongly dependent on room air movement and contaminant source location. It is shown that there exist gradients in contaminant distribution in the room in case of mixing ventilation and this will give rise to effectiveness different from 1.0. It is also shown that the location of the return openings may be very important compared with the small influence this location has on the velocity distribution in the room. The air flow rate in a room is often at a level where low turbulence effect takes place and the ventilation effectiveness and the velocity distribution are strongly influenced by this effect. It is shown how the temperature gradient and the temperature effectiveness are dependent on the location and type of heat sources in displacement ventilation. Concentration distribution and ventilation effectiveness are studied in a room with both stationary sources and moveable sources. The paper shows a description of the flow from a low level diffuser which is suitable for a design procedure in displacement ventilation. (au) (20 refs.)}
place = {Denmark}
year = {1992}
month = {Jul}
}
title = {Air distribution Systems - room air movement and ventilation effectiveness}
author = {Nielsen, P V}
abstractNote = {Ventilation effectiveness is strongly dependent on room air movement and contaminant source location. It is shown that there exist gradients in contaminant distribution in the room in case of mixing ventilation and this will give rise to effectiveness different from 1.0. It is also shown that the location of the return openings may be very important compared with the small influence this location has on the velocity distribution in the room. The air flow rate in a room is often at a level where low turbulence effect takes place and the ventilation effectiveness and the velocity distribution are strongly influenced by this effect. It is shown how the temperature gradient and the temperature effectiveness are dependent on the location and type of heat sources in displacement ventilation. Concentration distribution and ventilation effectiveness are studied in a room with both stationary sources and moveable sources. The paper shows a description of the flow from a low level diffuser which is suitable for a design procedure in displacement ventilation. (au) (20 refs.)}
place = {Denmark}
year = {1992}
month = {Jul}
}