This product is a PDF that contains links to files that consist of PowerPoint slides synchronized with the audio-recording of the speaker (recorded presentation), PDF files of the slides, and audio only (mp3) as noted.

The first paper in this session reports results from RP-1488. The purpose of that study was to obtain experimental loss coefficient data for various diverging flow flat oval tees and laterals. The results for branch loss coefficient data for tee and lateral fittings were shown to fit a power law correlation developed previously. The main loss coefficient data could not be correlated by power law. The average value for the main loss coefficient for straight-body tees was found to be -0.167. Likewise the main loss coefficient for straight-body laterals was found to be -0.216. This session also presents a method of correlating main and branch loss coefficients for saddle tap tees operated in the diverging and converging flow modes. The goal of that test program was to determine if the saddle tap tee is an efficient air moving junction, and if so to include the resulting loss coefficient data in the ASHRAE Duct Fitting Database (DFDB).

Laboratory Testing of Saddle Tap Tees to Determine Loss Coefficients (CH-12-036)
Ananth Nalla, Stephen A. Idem, Ph.D.
This product contains: Slides (pdf) Recorded Presentation Audio (mp3)

Measurements of Flat Oval Diverging Flow Fitting Loss Coefficients (RP-1488)(CH-12-037)
Daniel Gibbs, Associate Member, Stephen A. Idem, Ph.D.
This product contains: Slides (pdf) Recorded Presentation Audio (mp3)