Seminar 31 -- When is "Quiet", Quiet Enough? Understanding Sound Generation in Magnetic Bearing Machines 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.

Magnetic Bearing Technology is becoming increasingly common place in the built environment. This presentation will address acoustic testing and rating standards for magnetic bearing chillers and compressors. This includes understanding the sources of sound generation and learning how to isolate magnetic bearing compressor acoustics from the overall sound generation of the chiller. From there, participants will learn how to acoustically plan for magnetic bearing chillers during design and how to "put a stethoscope on your equipment room" to overcome problems in the field if the quiet chiller isn't quiet enough.

• 1. Magnetic Bearing Centrifugal Chillers: Sound and Vibration Aspects
  Patrick Marks, P.E., Fellow ASHRAE, Johnson Controls, New Freedom, PA
• 2. Acoustical Planning in System Design and Overcoming Sound Problems after Installation of Your Magnetic Bearing
  Chiller
  Kristan G. Kollevoll, Member, BRD Noise and Vibration Control, Inc., Wind Gap, PA