Not that I'm planning on designing any industrial dust collector
ducts... but I am curious how the design work is done.
Any book suggestions on that? Is there a "ASHRAE Duct Design for
Dummies" book around?
Here's the thing... I'm installing some instrumentation on several mid
'80's design dust collectors for a steel mill. They have 'wet type'
collectors made by an outfit out of Michigan named Schnieble, and
they're in pretty good shape....
I'm putting pressure transmitters in various places and not liking the
feedback I'm getting. The DP is not what it should be. I've talked to
the engineers from Schnieble, and while they support these units they're
no longer manufacturing them... modern technology triumphs again.
The manufacturer says all is (physically) as it should be... but then I
got to looking at the original prints... circa 1980... and they show
something called an 'evase' on the fan discharge. Now, I Googled this...
and now have some understanding what it's supposed to do... but it isn't
ON the units... I looked... twice. I still don't know how to pronounce
it, though (=;.
Anyhow, the original fan design calls for 14.3" wc @ 48,000 CFM. I'm not
measuring anywhere close to either number and I'm just curious as to why...
The customer will be happy if the DP is in range... but running 'out of
design' has me curious... and curious minds WANT to know... )-.