sbbhd
Mechanical
- Jul 1, 2002
- 2
I am looking for advice regarding condensation problem on a process exhaust and make-up air scenario.
I have a compensating exhaust hood (type II) that exhausts steam from soup kettles, I then have a supply plenum above the hoods open to the compensating face of the hood. As most HVAC projects go, they wanted to cut cost and not insulate the plenum or duct to each supply collar. And now they have a condensation problem (too much for the hood to remove)
The problem they are having is the cooler supply air (85 deg F)supplied to the plenum is causing the underside of the hoods with temps ranging from 110-180 deg F. to condense heavily.
A solution I came up with is to provide a 2" airgap above the hood within the plemum space. The aluminum material will provide reflectivity from the supply air temp and the underside of hood temps. The other option would be to duct each collar on the supply plenum.
If anyone can provide added insight would be appreciated.
I have a compensating exhaust hood (type II) that exhausts steam from soup kettles, I then have a supply plenum above the hoods open to the compensating face of the hood. As most HVAC projects go, they wanted to cut cost and not insulate the plenum or duct to each supply collar. And now they have a condensation problem (too much for the hood to remove)
The problem they are having is the cooler supply air (85 deg F)supplied to the plenum is causing the underside of the hoods with temps ranging from 110-180 deg F. to condense heavily.
A solution I came up with is to provide a 2" airgap above the hood within the plemum space. The aluminum material will provide reflectivity from the supply air temp and the underside of hood temps. The other option would be to duct each collar on the supply plenum.
If anyone can provide added insight would be appreciated.
