Leak pass Heat exchangers.

huffdawg Posted By huffdawg, Feb 10, 2013 at 2:28 PM

  1. huffdawg

    huffdawg
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    Oct 3, 2009
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    Any members use leak Pass heat exchangers?Just curious .
     
  2. Fred61

    Fred61
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    I wouldn't use anything that has the word leak in it;lol
     
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  3. huffdawg

    huffdawg
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    They are made to protect against domestic water contamination from a leak in the exchanger. IE. to stop boiler treatment chemicals from getting into your domestic water in the event of leak inside exchanger. Maybe they are used more in commercial applications.
     
  4. Karl_northwind

    Karl_northwind
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    Feb 13, 2012
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    Are you thinking about a Double Wall heat exchanger? (with leak detection)
    we use AIC or GEA for doublewall heat exchangers when we need them.
     
  5. huffdawg

    huffdawg
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    Oct 3, 2009
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    Yes thats what i'm refering too. What does the doublewall mean? 2 plates with a void in the center. what applications do you use them in. Do you use them to meet code.

    I work on a passenger ship ,we have 2 alpha laval plate type heat exchangers for dhw. which are heated from the jacket water from the the main engines and generators. They are single wall. We are required by regulation to have backflow preventers on all domestic water fixtures including the make-up water for the HVAC system. I'm surprised that we don't have protection at the heat exchangers.

    Huff
     
  6. BoilerMan

    BoilerMan
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    I think the double wall comes at the cost of an efficiency hit. The air space is vented to atmosphere so if either plate fails you get a leak at the vent location for indication.

    TS
     
  7. Karl_northwind

    Karl_northwind
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    Feb 13, 2012
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    We don't need to use them in Wi. if the fluid on the other side of the hx from the dhw is "practically nontoxic" and the solar antifreezes we use qualify. they're a lot more expensive, and less efficient. we usually have to run really close approach temps, so the single wall is the only way to go. we usually run our solar systems at lower than DHW pressures anyway.
     

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