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Correction Factor for 60% ethylene glycol

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Jim Cooke
Jim Cooke Member Posts: 3
I have the correction factor of x.87 for 50% ethylene glycol, but cannot find the correction factor for 60%.  Can anyone help me?

Thanks!

Jim Cooke - Mechanical Solutions NW

Comments

  • hot_rod
    hot_rod Member Posts: 22,146
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    yes

    all of the glycol engineering manuals I have, from various manufacturers end at 50%.



    Dow suggest a max. of 50- 55% be used in the DowFrost manual a PG glycol..



    I know many solar and hydronic components are tested and rated to a 50% glycol concentration. Does the job require 60%, seems like a strong blend? Why the EG?



    hr
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Jean-David Beyer
    Jean-David Beyer Member Posts: 2,666
    edited August 2009
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    Freezing points of glycol solutions.

    Here are tables for both ethylene glycol and propylene glycol. I post both because, depending on what you want to do with it, you may be required to use proplyene glycol; e.g., in systems where there is a risk of contaminating potable water with the the glycol-protected solution.



    [url=http://www.engineeringtoolbox.com/ethylene-glycol-d_146.html]http://www.engineeringtoolbox.com/ethylene-glycol-d_146.html



    [url=http://www.engineeringtoolbox.com/propylene-glycol-d_363.html]http://www.engineeringtoolbox.com/propylene-glycol-d_363.html
  • Jim Cooke
    Jim Cooke Member Posts: 3
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    60% glycol in Alaska

    Hi Hot Rod,

    60% is actually common in Alaska. 

    Jim
  • KevinCorr
    KevinCorr Member Posts: 106
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    Why 60%?

    Where are you in Alaska? I never heard of over 50% here in Fairbanks. I have tested mason jars of glycol at various %. We froze 6 jars of glycol mix from 5% to 50% and checked them at descending temps to see where each the mix froze or slushed. We did this 35 yrs ago outside at the Municipal Utilities and again last summer in the lab at Flowline pipeline company.



    You cannot freeze 50% propelene glycol even at -50 F below zero!

    Also surprising is that no jars broke at any temp with even 5%. It slushed up but did not break.
  • hot_rod
    hot_rod Member Posts: 22,146
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    best to check with the manufacturer

    and get the EXACT freeze and burst data and correction factors from them for a specific fluid. The numbers vary from brand to brand and also vary in different versions of the same brand.



    Here is an example of the Nobel Super 100 fluid. It shows freeze protection at 50% as well as full strength.



    I'm sure Drew has the correction factors, contact him at Nobel.



    hr
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • hot_rod
    hot_rod Member Posts: 22,146
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    oops, an RV fluid in above post

    Here is the sheet for a hydronic fluid. Or go to the Nobel, or any other glycol brand for that matter and check the specs.



    hr
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
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