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Recent content by afm

  1. afm

    anti-freeze & galvanized pipes

    The heat recovery system still works and I want to keep it in use, with a fluid in it. Does anyone know if it is just the corrosion inhibitors which re-act with the zinc, or will glycols (ethylene or propylene) re-act with the zinc as well? Thank you both.
  2. afm

    anti-freeze & galvanized pipes

    I’ve got an old run-around-coil heat-recovery system, which is handling about 12 cu m/sec of air. Heat is extracted from the exhaust air streams with 4-row coils and the water is pumped to 6-row coils to heat the supply air. The system seems to recover about 50% of the available heat, when it...
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