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Topic: Water cooled gate
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John Walsh
Film God
Posts: 2490
From: Connecticut, USA, Earth, Milky Way
Registered: Oct 1999
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posted 01-10-2001 08:40 PM
Isn't an actual cooling system overkill? (I'm asking; not complaining!) I mean, you are just trying to get the gate temperature down to a reasonable 90-100'F or so.I love sexy-fancy equipment, but I would think such a system would not make much difference in picture quality for the majority of theaters, which run 4K or less. Also, it's going to be much more expensive that what a regular water-cooling system costs, in addition to more maintaince (which most theaters also lack.) Again, not trying to negative, but it seems like a system for "special" theaters, not your regular multiplex.
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Pat Moore
Master Film Handler
Posts: 363
Registered: Mar 2000
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posted 01-10-2001 10:47 PM
I've got to say that I've never seen water in these standard recirculators even get past the tepid stage, let alone warm enough to brew tea. I've seen quite a number of locations using one circulator to cool two single projectors with platters in close proximity to each other.Refrigerant cooling would seem just a bit overkill to me. If that's needed to keep the trap operationally cool, then there has to be something else in the optical system that's getting really, really hot. Even the high-powered 870 systems we've built with 10kw behind them don't go that far. Pat
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John Wilson
Film God
Posts: 5438
From: Sydney, Australia.
Registered: Dec 1999
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posted 01-12-2001 12:58 AM
For the first 9 years of its 'new' life, the cinema I was chief at ran its cooling water straight through the JJ's and down the sink. When I pointed out that this was very much a no-no and suggested a tank of sorts to recycle the water, they agreed and I had our plumber make me one.This was a piece of ART man! He was (is) a big fan of H.G. Welles and what he made was something right out of one of his novels. There were tubes (lots of tubes) and bottles and fans and lights and at the end of it all we continually ran at temperatures of 50 to 60 degrees F. Even on 70mm in one screen and 35mm in another both running from the same unit. The cost of the unit came to over $5,000 and they paid it because they had approved it prior and we had been given what we asked for. They were also...well...stupid. Of course, I simply didn't want the $300 version. I wanted something that looked good too. The fact the 'upper' management were all morons and had happily paid for it added to my enjoyment of my new and expensive acquisition every time I walked into the booth and saw it. I had it mounted on the wall so that anyone who walked into the booth saw the unit from H.G. first. I got more conversations about that than the huge JJ on a pedestal! ------------------
"Awfully un-sporting of me...I know, but what the hey! I've got to have some fun!"
Daffy Duck.
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