Formula to calc sparge water temp after 1st runnings - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > Brew Science > Formula to calc sparge water temp after 1st runnings

Thread Tools
Old 02-12-2013, 06:43 PM   #1
May 2010
Wixom, Michigan
Posts: 609
Liked 22 Times on 20 Posts

What is the formula to calculate the temp of the sparge water needed after the 1st runnings have been drained from the mash tun so that the sparge temp is 168? I'm familiar with the strike water temp formula -

Strike Water Temperature Tw = (.2/r)(T2 - T1) + T2

r = The ratio of water to grain in quarts per pound.
T1 = The initial temperature (F) of the mash.
T2 = The target temperature (F) of the mash.
Tw = The actual temperature (F) of the infusion water.

Last batch, I measured the temp of the grain in my mash tun after mashing out and draining the first runnings as 161 degrees. I wanted to sparge with water hot enough to raise the temp to 168 and guesstimated 176 degrees. It got me close (164ish) and fortunately below 168, but now I'm curious if there's a formula that will relieve me of guessing.
Vir sapit qui pauca loquitur

Reply With Quote
Old 02-26-2013, 09:07 PM   #2
Registered User
Dec 2009
Huntsville, Alabama
Posts: 821
Liked 38 Times on 35 Posts

I don't know if there is a formula but I always sparge with 170F water. But I also batch sparge if it makes a difference.

Reply With Quote
Old 02-26-2013, 09:21 PM   #3
itsme6582's Avatar
Nov 2009
Posts: 883
Liked 29 Times on 26 Posts

Try Green Bay Rackers Mash Calculators. I'd link it but I'm on a phone and I don't want to.

On a side note, sparging at 168 doesn't really do anything. Your efficiency will be the same whether you're at 164 or 168. Denaturing is pointless since the mash already converted all starches.

Reply With Quote
Old 02-28-2013, 01:16 AM   #4
helibrewer's Avatar
Nov 2011
Santa Rosa, CA
Posts: 3,813
Liked 326 Times on 275 Posts

No formula, just heat it into the mid 170's and sparge. There is nothing particularly magical about sparge temps unless you are doing long fly sparges where continued conversion might make the beer drier than desired.
Something is always fermenting....
"It's Bahl Hornin'"

Kegged: Bourbon Barrel Imperial Stout
On Deck: German Lager

Reply With Quote
Old 03-02-2013, 02:10 PM   #5
Aug 2012
Okemos, MI
Posts: 42
Liked 1 Times on 1 Posts

V = Vmash * (Target Temp - start temp) /
(Boil Temp - T start)

That's what i used for my decoction mash. If you change your boil temp, to the temp of your water, and set the volume of water to the volume of the sparge you want to do. Then all you do is solve for the "boil temp" in that equation.

Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Batch sparge temp calc help? Rottnme General Techniques 7 12-16-2012 03:57 AM
Help with Water temp calc Bigsplash Beginners Beer Brewing Forum 15 11-24-2012 02:56 AM
can beersmith calc mash and sparge temp and volume ekjohns All Grain & Partial Mash Brewing 5 04-11-2010 10:12 PM
My formula - calculating sparge water ocbrew All Grain & Partial Mash Brewing 7 05-02-2008 02:54 AM
Question on BeerSmith and sparge water calc... the_bird All Grain & Partial Mash Brewing 4 12-02-2006 04:58 PM

Forum Jump