Recirculating discharge air to inhibit inlet filters from freezing
Recirculating discharge air to inhibit inlet filters from freezing
(OP)
I am new to the forum working on a project where we are going to recirculate a portion of our discharge air back across our inlet filters to stop them from freezing. We are drawing in atmospheric air @ ambient temperatures our discharge air is in excess of 100F. I would like to know if anyone can tell me at what conditions (%RH and ambient Temp) you would need to open the valve to start the defrosting process and for what amount time. The volume flow would also be helpful. Our filter is roughly 2500 square inches
Thanks in advance for you help
Thanks in advance for you help





RE: Recirculating discharge air to inhibit inlet filters from freezing
RE: Recirculating discharge air to inhibit inlet filters from freezing
RE: Recirculating discharge air to inhibit inlet filters from freezing
RE: Recirculating discharge air to inhibit inlet filters from freezing
In practice we frequently see filters in both positions, or left in winter position year round... but we try.
RE: Recirculating discharge air to inhibit inlet filters from freezing
I like MechEngNCPE's suggestion. The only additional energy you are using is pump energy. And since you are working with a large temperature delta, you shouldn't need to pump very much (relatively). I suppose you could recirculate some air but it sounds like this is a process application of some sort?
RE: Recirculating discharge air to inhibit inlet filters from freezing
RE: Recirculating discharge air to inhibit inlet filters from freezing
RE: Recirculating discharge air to inhibit inlet filters from freezing
RE: Recirculating discharge air to inhibit inlet filters from freezing
RE: Recirculating discharge air to inhibit inlet filters from freezing
RE: Recirculating discharge air to inhibit inlet filters from freezing
RE: Recirculating discharge air to inhibit inlet filters from freezing
RE: Recirculating discharge air to inhibit inlet filters from freezing
I can look at some info I have at work and see if you are into icing conditions. We have to deal with that all the time and it is surprising how little heat you have to add to get the temp/humidity ratio changed enough to get out of icing.
rmw
RE: Recirculating discharge air to inhibit inlet filters from freezing
RE: Recirculating discharge air to inhibit inlet filters from freezing
Now above 60+% at any temperature in that range...... well bring on the anit-icing.
rmw