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January 2011

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Subject:
From:
Phil Bavaro <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Wed, 5 Jan 2011 12:24:03 -0800
Content-Type:
text/plain
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Steve,

I thought you had meant that your misting spray was charged but you are
only talking about the equipment seems to be "poking" you.

I would check the grounding of the fan and make sure the fan cage is
tied into the earth ground.  

I hope you are using a GFCI to plug the fans into.

Phil



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Wednesday, January 05, 2011 11:53 AM
To: [log in to unmask]
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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