Yup...
The water serves as a conductive path to ground for the misting heads and the space charge envelop that develops form the misting head outward...
Paul
Paul Edwards
Process/Quality Engineering
Surface Art Engineering
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Tuesday, January 18, 2011 11:09 AM
To: [log in to unmask]
Subject: Re: [TN] Deionized water in misting fans and static electricity
Just to let everyone know how this little problem I had posted about a week
or so ago is going.
The DI bottles that we have on our misting system has a Resilite LED
1-megohm water monitor on them, and it just turned red the other day (the
water is below 1-megohm now). Guess what? No more static, and no more water
dripping from the fan cage. So I DO think that having DI water pumped
through the misting system has something to do it.
Steve
-----Original Message-----
From: Steve Gregory [mailto:[log in to unmask]]
Sent: Wednesday, January 05, 2011 2:53 PM
To: [log in to unmask]; 'TechNet E-Mail Forum'
Subject: RE: [TN] Deionized water in misting fans and static electricity
It didn't last year when we ran the fans on tap water. I was up all around
them and didn't a static shock I did this year...
We have a high pressure pump that pressurizes the water to around 800-1000
psi and pumps the water through about 75-ft of high-pressure plastic tubing,
and then goes to misting rings that are zip-tied to the fan blade cover of
the floor fans to disperse the water:
http://stevezeva.homestead.com/Misting_Fans.JPG
This is the second year that we've been using it. It keeps the humidity
level between 35%-40% on the shop floor. We need it during the winter.
Last year when used it, we had a lot of "dusting" because we were using tap
water. This year we put a DI column on the water source.
How I come across the static charge is because I noticed that some water had
begun collecting at the base of fans. I went up to check why (the fans are
on top of our offices inside our manufacturing space). When I approached and
touched the metal cage around the fan, I got a little "poke" from the
static.
The water is puddling (I think) because it's being attracted to the metal
fan blades and slinging off the blades to collect on the fan cage and then
drip to the ground. The fans weren't doing this last year when we ran them
on tap water...
Steve
-----Original Message-----
From: Robert Kondner [mailto:[log in to unmask]]
Sent: Wednesday, January 05, 2011 2:10 PM
To: 'TechNet E-Mail Forum'; 'Steve Gregory'
Subject: RE: [TN] Deionized water in misting fans and static electricity
Steve<
DI is a heck of an insulator. I assume tap water did not do this?
Bob K.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Wednesday, January 05, 2011 1:32 PM
To: [log in to unmask]
Subject: [TN] Deionized water in misting fans and static electricity
This may be an off the wall question but here goes.
We have some misting fans that we use for humidification that we've just
recently put in a deionized water source for.
Now it seems that there's a static charge being generated at the fans that
I've never noticed before. Could it be possible that we're generating a
charge at the fans because of the DI water?
Steve
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