Author Topic: Mash Tun: Temperature Uniformity  (Read 1232 times)

Offline wheelhousebrewing

  • 1st Kit
  • *
  • Posts: 7
    • View Profile
Mash Tun: Temperature Uniformity
« on: March 07, 2013, 01:52:28 PM »
I use a 70 qt Coleman with CPVC manifold.  During mashes, I have noticed at times that my temp readings are multiple degrees different throughout the cooler. The manifold gets in the way of stirring up the grain which likely contributes to variant temps.  Any ideas on improving this issue?
« Last Edit: March 07, 2013, 01:54:59 PM by wheelhousebrewing »

Offline a10t2

  • Official Poobah of No Life.
  • *
  • Posts: 3163
  • Ask me why I don't like Chico!
    • View Profile
    • SeanTerrill.com
Re: Mash Tun: Temperature Uniformity
« Reply #1 on: March 07, 2013, 01:56:33 PM »
I stir throughout mash-in, which is about 2-3 minutes, and another 2-3 minutes afterward. That generally gets me within 1°C throughout the grain bed.
Beer is like porn. You can buy it, but it's more fun to make your own.
http://seanterrill.com/category/brewing/

Offline mtnrockhopper

  • I spend way too much time on the AHA forum
  • ********
  • Posts: 2878
  • Delaware
    • View Profile
Re: Mash Tun: Temperature Uniformity
« Reply #2 on: March 07, 2013, 02:07:24 PM »
Do you put water or grain in first? Water first might help as it will get the cooler walls and manifold at the right temp before adding grain. The grain tends to float a bit too, so it won't get down into the manifold until it is wet (and warmed).
Jimmy K

Delmarva United Homebrewers - President by inverse coup when the old president ousted himself.
AHA Member since 2006
BJCP: B0958

Offline denny

  • Administrator
  • I must live here
  • *****
  • Posts: 11660
  • Noti OR [1991.4, 287.6deg] AR
    • View Profile
    • Dennybrew
Re: Mash Tun: Temperature Uniformity
« Reply #3 on: March 07, 2013, 02:30:06 PM »
I agree with Sean.  I keep stirring until I get the same temp reading no matter where in the tun I check.
Life begins at 60.....1.060, that is!

www.dennybrew.com

The best, sharpest, funniest, weirdest and most knowledgable minds in home brewing contribute on the AHA forum. - Alewyfe

Online Jeff M

  • Brewmaster
  • *****
  • Posts: 539
  • Currently upgrading to Brewery 3.0
    • View Profile
Re: Mash Tun: Temperature Uniformity
« Reply #4 on: March 07, 2013, 07:23:21 PM »
he must have a orange cooler....
Granite Coast Brewing Company.
Building a clone of The Electric Brewery to use as a pilot system for new recipes!

Offline dean_palmer

  • Cellarman
  • **
  • Posts: 84
    • View Profile
    • The Beer Journals
Re: Mash Tun: Temperature Uniformity
« Reply #5 on: March 08, 2013, 08:06:34 AM »
When using my cooler (round, orange) I preheat a bit with some hot tap water and then add the strike water, then the grain. Like Denny I stir until the temp stabilizes. After that I'll stir about every 15 minutes and add hot water if I lose temp from said stirring. Stirring seems to help the efficiency a bit as well.

When using my direct-fired stainless tun with RIMS, I also stir until the temp is stable and then let the RIMS system keep it there, but still give a full stir about every 15 minutes.
« Last Edit: March 08, 2013, 08:09:22 AM by dean_palmer »

Offline bwana

  • Cellarman
  • **
  • Posts: 90
    • View Profile
Re: Mash Tun: Temperature Uniformity
« Reply #6 on: March 08, 2013, 08:19:09 AM »
I stir well in the begining then every 15-20 minutes. I use a round "yellow" cooler and take my temps at the top. I loose 1-2 degrees depending how long I mash.

Online fmader

  • Brewmaster
  • *****
  • Posts: 849
    • View Profile
Re: Mash Tun: Temperature Uniformity
« Reply #7 on: March 08, 2013, 08:12:05 PM »
Blue coolers spawn their own 152 degree mash water
Frank

Offline gandelf

  • Assistant Brewer
  • ***
  • Posts: 103
  • Mill Creek Brewery, Temptation Rd
    • View Profile
Re: Mash Tun: Temperature Uniformity
« Reply #8 on: March 10, 2013, 02:43:24 AM »
Thanks everyone
Religion; A contrived security blanked for a species that is currently in its adolescent phase of its evolutionary journey.

Offline alcaponejunior

  • Brewer
  • ****
  • Posts: 360
  • Latest creation: Big Smash Saturday
    • View Profile
    • alcaponejunior.wordpress.com
Re: Mash Tun: Temperature Uniformity
« Reply #9 on: March 10, 2013, 03:39:49 PM »
I stir well in the begining then every 15-20 minutes. I use a round "yellow" cooler and take my temps at the top. I loose 1-2 degrees depending how long I mash.
My cooler is round and blue. :D

I stir three times during the 75 minute mash and don't worry about it otherwise.  If the temp is close enough, it's good enough.  It's always within 1-2F anyway.

Offline ynotbrusum

  • Senior Brewmaster
  • ******
  • Posts: 1004
  • Da mihi sis cerevisiam.
    • View Profile
Re: Mash Tun: Temperature Uniformity
« Reply #10 on: March 12, 2013, 12:26:27 PM »
40 quart marine cooler (white and rectangular) works best for my 5 gallon batches.  Stir down to temp, usually about 2-3 minutes; most of the water added first, then grain and stir a minute or so, then more water, keep stirring until temps are uniform and at desired temp. YMTMV (your mash tun may vary).... :P
« Last Edit: March 12, 2013, 07:22:34 PM by ynotbrusum »
Hodge Garage Brewing: "Brew with a glad heart!"