Seminar 59 -- Designing Energy Efficient Duct Systems PDF

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

The impending publication of the ASHRAE Duct Systems Design Guide will enable engineers to design duct systems that minimize the installed cost of the ductwork, minimize system-generated noise, and minimize fan energy. The guide will describe the equal friction and static regain duct design methods. The equal friction method calculates the duct size based on the initial friction loss rate. For the static regain design approach, main ducts and branches are then sized to achieve a balanced pressure loss from section to section. Both duct design approaches use the ASHRAE Duct Fitting Database (DFDB) to calculate fitting loss coefficients.

• 1. Comparing the Equal Friction and Static Regain Duct Design Methods
  Pat Brooks, P.E., Member, SMACNA, Chantilly, VA
• 2. Computer Modeling Advantages for Accurate Duct Sizing Using TP=VP+SP
  John Reints, P.E., Member, www.staticregain.net, DeKalb, IL
• 3. Analysis of Pressure Loss and Flow Distribution in Multi-Branch Duct Systems
  Stephen Idem, Ph.D., Member, Tennessee Tech University, Cookeville, TN