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Thread: Glycol loop acceptable heat gain?

  1. #1
    Join Date
    Mar 2014
    Location
    Albuquerque, NM
    Posts
    20

    Glycol loop acceptable heat gain?

    What would be considered an acceptable heat gain in your glycol loop. In the glycol reservoir we are at 25-26F. By the time the header reaches the fermenters, the temp is up to 33-34F. Like so others, we cannot crash our fermenters the past few weeks with the heat and humidity so high.

  2. #2
    Join Date
    Jun 2011
    Location
    Richmond, VA.
    Posts
    438
    are your headers insulated?

  3. #3
    Join Date
    Aug 2010
    Location
    Enterprise, Oregon
    Posts
    1,955
    The least amount of heat gain in your lines possible is the most acceptable. Insulate them so they are as nearly air-tight as possible, with at least 1" of closed-cell foam. Use contact cement and insulation tape to seal them. Heat gain from condensation is very significant.
    Timm Turrentine

    Brewerywright,
    Terminal Gravity Brewing,
    Enterprise. Oregon.

  4. #4
    Join Date
    Mar 2007
    Location
    Tustin, CA, USA
    Posts
    4
    Hi,
    If you have a well insulated piping system you should not see any heat gain.
    With that heat gain you loose a lot of energy and it will cost you a lot of money each month to run your system. That will be less profit on your beers.
    For example if we would install 400 ft. of COOL-FIT ABS Plus header piping in 3" diameter and we would pump 119 GPM of 25 F Propylene glycol with a concentration of 35% through this system and our ambient temperature would be 104 F then our media temperature in the end of the 400 ft. would be 25.16 F.
    So it is very important to install a well insulated piping system because the cost for that is only once but if you try save so money up front and take some shortcuts you will pay for it every month and it will end up costing you way more money in the end.

    Please don't hesitate to contact me if you have any questions

    Cheers!

    Dan

    Dan Strömberg
    Cooling Market Segment Manager
    Georg Fischer LLC
    Phone: +1 714 368 4196
    Fax: +1 714 368 4197
    Mobile: +1 951 642 2339
    Dan.Stromberg@georgfischer.com

    GF Piping Systems
    9271 Jeronimo Rd., Irvine, CA. 92618
    United States
    www.gfps.com/us

  5. #5
    Join Date
    Sep 2005
    Location
    Louisville, KY
    Posts
    956
    Def check your pipe insulation. The thickness of your pipe insulation depends on material the pipe is made of, the temp of the liquid going thru the pipe, and the extremes of the ambient temp in the surrounding area. I have spent the last two years replacing old moldy half inch insulation from our header. Two problems, the insulation was not thick enough, and was not sealed near well enough for the humidity we have in the Ohio Valley.
    Joel Halbleib
    Partner / Zymurgist
    Hive and Barrel Meadery
    6302 Old La Grange Rd
    Crestwood, KY
    www.hiveandbarrel.com

  6. #6
    Join Date
    Mar 2014
    Location
    Albuquerque, NM
    Posts
    20
    The header is inulated...ish. Definitely could use improvement. I'm certain this is where the heat gain is from. Thank you for the replies

  7. #7
    Join Date
    Aug 2010
    Location
    Enterprise, Oregon
    Posts
    1,955
    What is the diameter of your cold glycol header? I've seen headers as small as 3/4" in use, which is another cause of excess heating. The larger the diameter, within reason, the lower the surface area to volume, making it much easier to insulate.
    Timm Turrentine

    Brewerywright,
    Terminal Gravity Brewing,
    Enterprise. Oregon.

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