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Re: Desuperheaters
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Posted by Robert Gammon on Friday, 25 April 2008, at 2:37 p.m.,
in response to Re: Desuperheaters, posted by Robert Gammon
One way to avoid the scaling problem is to use a closed loop on the desuperheater. This routes the water thru a tank that has a heat exchanger in it, much like the tanks used with boiler systems.
I found one that is simpler in construction than the ones used for Solar heating. This one is tank within tank. Both tanks are constructed using stainless steel. For example, the 115Gallon tank is inside a second tank that holds 42 gallons of water and has 42 sq ft of stainless steel surface area to transfer heat. Desuperheater(s) and/or w-w heat pumps will attach to the outer tank and can use deionized water to circulate in order to avoid scaling in the desuperheater. 42 sq ft of surface area will surely transfer a very large percentage of the heat from the desuperheater/w-w heat pump to the stored water that will supply the main DHW tank.
It comes in several different sizes, and has a limited lifetime warranty for residential use.
Not cheap, but buy it once and forget about it.
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