I am with the Goodrich Corporation, an Aerospace products manufacturer. We currently utilize a number of environmental chambers (LN2 based) for environmental type conformity testing. These types of tests and the associated requirements are products of the FAA (Federal Aviation Administration) and EADS (European Aerospace Standards). I am looking to resolve an issue we seem to be having with the ventilation system. There is not insulation and I am sure you can figure we are having freeze up issues during long duration tests. I would like to understand what we need to do to properly insulate our ventilation system. Some resources/contractor direction would be extremely helpful as well.
1 Comment
Rolf Wieland
August 1, 2008Brian, there are a number of ways to resolve this issue. The simplest is to insulate all exhaust and ventilation ducts with at least 3”-6” of closed cell foam insulation. (Do not use fiberglass insulation because this will saturate with moisture over time and lose its insulating properties). This will virtually eliminate the frost on the ducts. If you have freezing up of your exhaust blowers you need to install T’s in the exhaust lines with a damper that will allow warm air to be mixed and controlled with the cold air being exhausted from your chambers.
I hope this helps and please feel free to e-mail me with further questions or if you require additional info.