Seminar 70 -- Save Energy and Improve Occupant Comfort with Advanced VAV Zone Controls PDF

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.

Despite significant energy savings and over 10 years of installation history, dual-maximum VAV controls have not seen wide market adoption. Most market barriers, both technical and perceived, have been addressed in the past 5 years and the industry is now at the point where wide market adoption is likely. This presentation will provide an overview of dual-maximum controls, hardware selection, and design calculations including calculation of ASHRAE Standard 62.1 minimum ventilation rates. Dual Maximum control sequences with low minimum flow setpoints reduce fan, cooling, and reheat energy. Energy savings occur during periods of low load when conventional minimum setpoints are delivering more air than is needed to meet the load. This presentation will summarize detailed energy monitoring results of a California Public Interest Energy Research project that ran in parallel to the ASHRAE RP-1515 project (Comfort & Air Quality effects of low minimums) that carried out a field study in 6 large buildings, five on the Yahoo! campus and one county government building. Energy savings predictions will be compared to measurements and summaries of trends for over 1000 zones will illustrate the dynamics of real systems in operation. The comfort impacts of the dual setpoints will also be reported.

Advanced VAV Zone Control Overview
Steve Taylor, P.E., Fellow ASHRAE
Product Contains: Slides (pdf), Recorded Presentation, Audio (mp3)

Energy Savings From Reduced VAV Box Minimum Flow
Gwelen Paliaga, Member
Product Contains: Slides (pdf), Recorded Presentation, Audio (mp3)

Occupant Comfort Under Reduced Minimum VAV Flow Rates
Edward A. Arens, Ph.D., Member
Product Contains: Slides (pdf), Recorded Presentation, Audio (mp3)