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Author Topic: Water Chillers
Mark Gulbrandsen
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Posts: 16657
From: Music City
Registered: Jun 99


 - posted 05-06-2002 12:47 PM      Profile for Mark Gulbrandsen   Email Mark Gulbrandsen   Send New Private Message       Edit/Delete Post 
Can someone out there reccommend a good water chiller for cooling a 35mm X-L running a 7kw lamp? Thanks!
Mark @ GTS

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000


 - posted 05-06-2002 12:53 PM      Profile for John Pytlak   Author's Homepage   Email John Pytlak   Send New Private Message       Edit/Delete Post 
Kinoton has one, that uses refrigeration:
http://www.kinoton.com/zwei-kreis-wasserkuehler.htm

They also carry one that uses a heat exchanger with room air to cool:
http://www.kinoton.com/lwk.htm

Perhaps Larry Shaw can add to this?

------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243
e-mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion


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Steve Kraus
Film God

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From: Chicago, IL, USA
Registered: May 2000


 - posted 05-06-2002 01:58 PM      Profile for Steve Kraus     Send New Private Message       Edit/Delete Post 
No, but I do know that Walmart "Tech" Antifreeze (& water) is the official coolant of Boeing Digital Cinema.

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Mark Gulbrandsen
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From: Music City
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 - posted 05-06-2002 04:22 PM      Profile for Mark Gulbrandsen   Email Mark Gulbrandsen   Send New Private Message       Edit/Delete Post 
Steve, When you try to blast a 7kw lamp through an X-L 35mm aperature for 2 plus hours a chiller is really the only safe way to keep the projector from turning into a molten glob of alumnium.

John, Thanks for the link. I called them for availability and pricing.
Mark @ GTS


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Frank Angel
Film God

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From: Brooklyn NY USA
Registered: Dec 1999


 - posted 05-07-2002 06:49 AM      Profile for Frank Angel   Author's Homepage   Email Frank Angel   Send New Private Message       Edit/Delete Post 
I use a fish tank pump that passes the water into an off the shelf finned car oil heat exchanger. I purchased some surplus refrigerant plates that get nice an cold when DC current is applied to them in one direction; reverse polarity and they heat up. I siliconed them to the heat fins and they cool the water nice and cold, even if it runs for hours. We power the refrigeration plates with the old exciter lamp supplies, which otherwise would be door stops after the red scanners were installed. I had to devise this scheme because the booth is not big enough to hold two XLs, an Eastman 25B, a Strong SuperTrouper AND those big water drums.

In the Prospark Park venue, I just throw a bag of ice in the water drums. Keeps the water cold for the two, two and a half hours that we run at night.

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Aaron Sisemore
Flaming Ribs beat Reeses Peanut Butter Cups any day!

Posts: 3061
From: Rockwall TX USA
Registered: Sep 1999


 - posted 05-07-2002 09:40 AM      Profile for Aaron Sisemore   Email Aaron Sisemore   Send New Private Message       Edit/Delete Post 
You might see if you can find some of those older Ashcraft recirculators that have the fan-assisted cooling coils on the top of the pump... I remember the coolant in those running ice cold at the drive-in both carbon (Futura II's) and xenon.

-Aaron

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Stephen Jones
Master Film Handler

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From: Geelong Victoria Australia
Registered: Jun 99


 - posted 05-07-2002 07:28 PM      Profile for Stephen Jones   Email Stephen Jones   Send New Private Message       Edit/Delete Post 
Mark, We are useing a Kinoton water chiller to cool the gate.We are running a 7kw lamp in this consol.The chiller keeps evrything nice and cool with no problems.
Steve

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Frank Angel
Film God

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From: Brooklyn NY USA
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 - posted 05-07-2002 08:38 PM      Profile for Frank Angel   Author's Homepage   Email Frank Angel   Send New Private Message       Edit/Delete Post 
Do these units always use water or can some other coolant do better?

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Phil Hill
I love my cootie bug

Posts: 7595
From: Hollywood, CA USA
Registered: Mar 2000


 - posted 05-07-2002 09:17 PM      Profile for Phil Hill   Email Phil Hill       Edit/Delete Post 
Strong makes a cooling kit. I've used them for years with not a problem. Basically it's a big (5-gallon?) tank with a recirculation pump. Add a spot of anti-freeze and you are all set for 7k. (Of course you need the water-cooled trap)

>>> Phil


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Frank Angel
Film God

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From: Brooklyn NY USA
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 - posted 05-07-2002 09:51 PM      Profile for Frank Angel   Author's Homepage   Email Frank Angel   Send New Private Message       Edit/Delete Post 
Phil,

Why the anti-freeze?

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John Pytlak
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From: Rochester, NY 14650-1922
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 - posted 05-07-2002 10:01 PM      Profile for John Pytlak   Author's Homepage   Email John Pytlak   Send New Private Message       Edit/Delete Post 
A bit of permanent (ethylene glycol) antifreeze helps prevent corrosion and bacterial/algae growth.

------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243
e-mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion


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Mark Gulbrandsen
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From: Music City
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 - posted 05-07-2002 10:09 PM      Profile for Mark Gulbrandsen   Email Mark Gulbrandsen   Send New Private Message       Edit/Delete Post 
I have used the Strong water cooler too. On a Simplex once running a 4.2 kw lamp after all day operations the water actually became steamy!! Basically fine for a show or two but not for all day operation with 7kw. I've had too many good reports back from those using refrigerated water chillers that are able to keep the trap at room temperature all day and night with that size lamp. Thats what I'm after. If this system goes we'll end up using the Kinoton unit.
Mark @ GTS

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999


 - posted 05-08-2002 08:23 AM      Profile for Steve Guttag   Email Steve Guttag   Send New Private Message       Edit/Delete Post 
One thing I have given up on in the water cooling systems is the antifreeze. What minimal benefits it brings is far overshadowed by the scum that tends to form with it not to mention it should be treated as hazardous waste (ie don't flush it down the drain).

I go with straight distilled water....it's safe, cheap, effective and if changed with minimal regularity (once a year) no significant sediment forms.

Steve

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"Old projectionists never die, they just changeover!"

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
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 - posted 05-08-2002 08:42 AM      Profile for John Pytlak   Author's Homepage   Email John Pytlak   Send New Private Message       Edit/Delete Post 
Steve -- do you at least add an algaecide, such as might be used to prevent bacterial/algae growth in the water used in a humidifier? Warm water can be a breeding ground for these things.

------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243
e-mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999


 - posted 05-08-2002 09:43 AM      Profile for Steve Guttag   Email Steve Guttag   Send New Private Message       Edit/Delete Post 
John,

I must admit, I do not. I use straight distilled water. My theory is that it is mostly a closed system. Even the Strong water circulator is a closed tank...I don't see any significant anything growing in the water (it startes out distilled)....again a change out about once a year seems like enough. The only contaminents I have noticed is in the copper tubings on new projectors with the copper itself showing up in the water.

Steve

------------------
"Old projectionists never die, they just changeover!"

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