Description

There have been a number of concerns regarding the balcony spill plume equation provided in North American standards and codes. These include: lack of verification by fullscale experiments and application of the equation for high atria even though it was developed for low-height atria. As a result of these concerns, the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) initiated a project to evaluate the balcony spill plume equation used in North American codes and standards (RP-1247). The primary research conducted, as part of RP-1247, was a series of full-scale experiments conducted to investigate smoke flow in balcony spill plumes and the resulting mechanical exhaust requirements for an atrium. The research project included CFD modeling studies to investigate smoke entrainment in the balcony area and smoke entrainment in high atria. In this paper, the results of a CFD model study, which investigated the variation of plume mass flow rate with elevation in a simulated atrium, are presented. Results from the CFD model study were compared to existing engineering correlations. A new correlation was also developed for the variation in mass flow rate with elevation for a balcony spill plume. This correlation extends the present correlations to high elevations at which no experimental data is available.

Units: SI

Citation: ASHRAE Transactions, vol. 114, pt. 1, New York 2008

Product Details

Published:

2008

Number of Pages:

10

File Size:

1 file , 1.9 MB

Product Code(s):

D-NY-08-042