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#1
05-03-2014, 12:14 AM
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Just a thought but why not use the waste water/brine from the RODI unit as your cold reservoir? Direct this to a large insulated container (trash can, tote, old tank) and you have quite a large heat sink that would probably stay cold enough for quite some time if the system is only used when required.
I get drinking water from mine too, but I'd think that given the typical waste ratio on an RODI unit there'd be plenty to maintain an effective heat sink. If you are using tap water as the heat sink, I'd adjust the flow so that your waste flow from your heat exchanger is the same temperature as the sump water, that way you know you've pumped as much heat into it as possible..
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SmallFry's 75 Gallon (Reef Eventually) Build 
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#2
08-08-2014, 11:03 PM
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I'm surprised that nobody mentioned using ground source cooling. Think of a ground source heat pump in reverse. Would cost you zero to run and is the greenest of all options. Simply t-off of your return pump and run it out to cooling coils buried out in your lawn and then back into your sump. There is actually a chapter in j Sprung's books on how to do it.
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Hybrid Mode
