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Recent content by donniesdad

  1. donniesdad

    Pressure generated by a 30% Ethylene Glycol on a closed thermal sys?

    btruebllod and BigInch, thank you for your insight. Your suggestions are directed at the increase in volume - do I assume that the glycol mix is 100% non-compressing, and then look at the calculated pressure necessary to change the pipe volume and assume that is the pressure created?
  2. donniesdad

    Pressure generated by a 30% Ethylene Glycol on a closed thermal sys?

    BTW - This is a 2" copper system, using Press-connection fittings that are separating, if this is of any value.
  3. donniesdad

    Pressure generated by a 30% Ethylene Glycol on a closed thermal sys?

    I am witnessing a customer system failure when they capture 20°F chilled 30% glycol between two ball valves, and allow the captured solution to heat up as much as 70°F. I realize that an expansion tank is in order, but I need to calculate the pressure change to justify it to them. There are many...
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