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Old 08-05-2009, 12:51 AM   #11
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The PE device isn't extremely efficient, I'll give you that. The ones that I saw were actually designed for larger tanks. If I remember, the ones for up to 125 gallon was about $300. I'll keep looking to try to find them again and post back.
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Old 08-05-2009, 02:02 AM   #12
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Okay, I found what I was talking about. they are at CASCO Group the price is much more than what I thought but I was just browsing around and had lots of prices in my head.

Aside from the cost, I'd rather have one of these running than a standard cooler cyclin all the time and trying to figure out what to do with the exhaust.
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Old 08-05-2009, 04:25 PM   #13
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Wow... that's an interesting link. I'd never seen ones that big.

I'm kinda confused though about your comment about not having to deal with the exhaust. Regardless of HOW you cool the water - whether by a standard heat exchanger or by a thermoelectric one - you're going to have to deal with the exhaust of hot air. You can't lower the water temperature and not generate heat.

While I'm not really familiar with these units, I do know that thermoelectric coolers are terribly inefficient compared to standard condenser-based unit. You'd probably be running this unit for a much longer time cycle than a condenser-based unit to get the same heat rejection. More money for the unit, more money for the energy, and you still have to deal with the heat generated by the unit.
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Old 08-05-2009, 04:29 PM   #14
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Dang, Those are some big thermoelectric setups! The one I made was only like 80W. Then again, I didn't know (at that time) you MUST put the hot side on a heatsink, soo I burned out like three of them.
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Old 08-05-2009, 10:40 PM   #15
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Quote:
Originally Posted by Kurt_Nelson View Post
I'm kinda confused though about your comment about not having to deal with the exhaust. Regardless of HOW you cool the water - whether by a standard heat exchanger or by a thermoelectric one - you're going to have to deal with the exhaust of hot air. You can't lower the water temperature and not generate heat.
Yes, the heat has to go somewhere, but I'd imagine the volume of air is much more with the traditional units. I have sent the manufacturer an email asking for specific specs on the unit and how much heat is given off. Plus, it'll run about as loud as a computer. I could keep this under my cabinet and not worry about exhausting the heat, I would think or any condensation worries.

Quote:
While I'm not really familiar with these units, I do know that thermoelectric coolers are terribly inefficient compared to standard condenser-based unit. You'd probably be running this unit for a much longer time cycle than a condenser-based unit to get the same heat rejection.
I know that they are inefficient but I'll have to do the math once I receive the specs to see if one over the other is cheaper to operate and what long term costs are. The only moving part is the fan(s) and there is zero freon involved.

Now, the condensor based units are well proven technologies and that is something to consider. All in all, the cost will keep me from doing it for the time being. I'll have to get facts from the manufacturer and see how it plays out.
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Old 08-05-2009, 11:55 PM   #16
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Err, You do realize i posted the link on the first page right?
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Old 08-06-2009, 01:09 AM   #17
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Yes, the heat has to go somewhere, but I'd imagine the volume of air is much more with the traditional units. I have sent the manufacturer an email asking for specific specs on the unit and how much heat is given off. Plus, it'll run about as loud as a computer. I could keep this under my cabinet and not worry about exhausting the heat, I would think or any condensation worries.
Not sure about the volume of air, but the amount of heat is going to be the same. If you look at their FAQs, you'll see they definitely touch on having adequate airflow around the units. You can't just tuck them away without means for ventilation.

I don't use a chiller... just a fan across the top of the tank and a portable a/c unit when it gets really hot... so I don't really have a strong opinion one way or another about them. I just didn't want you to think that these thermoelectric ones don't have the same heat rejection issues that normal ones do.
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