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.

This session contains presentations about two typical elements for HVAC applications. It is widely known that an ionizer operated upstream of a ventilation air filter can significantly enhance the filtration efficiency. Based on an experimental investigation, the first paper presents how different fiber materials and filter classes will influence this efficiency enhancement. The second paper aims to address the anchor forces in L-bend and U-bend piping due to thermal expansion. Anchor force results are calculated following different methodologies (ASHRAE, Kellogg, Grinnell-Spielvogel, and simple cantilever methods). The large discrepancy among the results is explained and recommendations are made for ASHRAE Handbook edits and future research.

Influence of Filter Fiber Material on Removal of Ultrafine and Submicron Particles Using Carbon Fiber Ionizer-Assisted Intermediate Air Filters (CH-12-C077)
Bingbing Shi, M.D., Ekberg Lars, Ph.D.
This product contains: Slides (pdf) Recorded Presentation Audio (mp3)

Comparison of Simplified Computational Methods of Flexibility Analysis to Determine Thermally Developed U-Bend and L-Bend Anchor Forces (CH-12-C078)
Sean Robinson, D. Scott Fisher, P.E., Member
This product contains: Slides (pdf) Recorded Presentation Audio (mp3)