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Glycol - Piping Pressure Drop

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Brian_18
Brian_18 Member Posts: 94
in THE MAIN WALL
http://www.taco-hvac.com/uploads/FileLibrary/SelectingCirculators.pdf

Document TD10 I found this document to be very helpful. If you throw the basic formula (page 3) on a spreadsheet, you can play around with the parameters and see the effect on headloss.

Comments

  • Chuck_17
    Chuck_17 Member Posts: 148


    Do you know any sources for the effect of ethylene glycol solutions on piping pressure drop (other than ASHRAE)?
    The curves in ASHRAE systems handbook changed significantly between 1980 and 2004 so I want a second opinion.
    Specifically 20% solution operating at 30F.
  • ALH_4
    ALH_4 Member Posts: 1,790
    Head Loss

    Grundfos has some tables for various concentrations.

    Dow has viscosity information for Dowfrost propylene glycol.
  • Kevin Koenig_4
    Kevin Koenig_4 Member Posts: 36
    Pressure drop

    Your friends at B&G have a very valuable tool called System Sizer. You can easily enter your pipe size, pipe type,fluid temp etc. to calculate pressure drop. Check it out here.
    http://www.bellgossett.com/BG-SystemSyzer.asp
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