How do you determine efficiency? - Home Brew Forums

Register Now!
Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > How do you determine efficiency?

Reply
 
Thread Tools
Old 03-25-2009, 11:58 AM   #1
Eves
Recipes 
 
Mar 2008
Posts: 382
Liked 4 Times on 4 Posts



I'm going to be starting my first partial mash today or tomorrow and I just realized that I have no idea how to determine what efficiency I end up with. Is it just based on what ending OG you get vs the fermentables? Is this something best suited for using one of those applications like pro mash or whatever?

 
Reply With Quote
Old 03-25-2009, 12:26 PM   #2
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
 
Bobby_M's Avatar
Recipes 
 
Aug 2006
Whitehouse Station, NJ
Posts: 23,201
Liked 1658 Times on 1071 Posts


Efficiency of a partial mash is really based on the gravity and volume of the wort you derive from the grain. Don't wait until after you add malt extract to measure these things.
__________________
Welcome to BrewHardware.com. I love you.
BIAB Large Mesh False Bottoms and SS HERMS COILS are IN!!
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc.

 
Reply With Quote
Old 03-25-2009, 02:08 PM   #3
Homercidal
Licensed Sensual Massage Therapist.
HBT_MODERATOR.png
 
Homercidal's Avatar
Recipes 
 
Feb 2008
Reed City, MI
Posts: 30,652
Liked 4765 Times on 3217 Posts


Measure your water at every step.
Measure your grain bill.
Take hydro samples after sparging.

You'll have to know the efficiency of the grains and add it up. This will tell you what the maximum amount of sugar you could possibly extract will be. Compare your hydro reading to the maximum potential and this determines your efficiency.

You could never extract maximum sugars and even if you got very close, your wort would likely be unsuitable for brewing due to tannins and stuff. But many get over 75% and some into 80s after tweaking their process.

 
Reply With Quote
Old 03-25-2009, 03:47 PM   #4
hopsalot
Recipes 
 
Sep 2007
Corpus, Texas
Posts: 1,553
Liked 18 Times on 17 Posts


here is my calc for eff for one of my brews:


brew efficiency overview

--------------------------------------------------------------------------------


SMaTH Brewed 12-17-08 kegged 1-19-08

12# vienna
1 oz Centennial (8.00% AA 60 min)
2 oz Cascade (5-6?% AA 1 oz 30 min, 1 oz 5 min )

Mash 154*F, 4.5 gal, 1 hour
Sparge 180*F, 4 gal

Boil volume: 7-7.5 gal
Boil 1 hour
End volume: 5.5 gal

SG: 1.034
OG: 1.060
FG: 1.014

I calculate ABV: 6.03%

So here are my thoughts. The beer is great very clear, yeasty and citrusy. Has turned out to be a great people pleaser. All grain is as easy as you want it to be but I am interested in the actual efficiency of my system in order to get better data for online brew calculators.

12# Vienna
F. gravity 1.060

GU = (Grav-1)x1000
GU = 60 GU

GU of total gravity = 60 GU*5.5 gal = 330 total GU
12 # Vienna = 330 GU

total grav of wort = (SG-1)*1000 * boil volume
= 34 GU * 7 Gal (pre boil) = 238

Eff = total gravity of wort/total potential gravity of grains
Eff = 238/330 = 72%
__________________
In Illa Brettanomyces Nos Fides

http://bjsbrewery.blogspot.com/

 
Reply With Quote
Old 03-25-2009, 03:57 PM   #5
Lil' Sparky
Cowboys EAC
HBT_LIFETIMESUPPORTER.png
 
Lil' Sparky's Avatar
Recipes 
 
Feb 2006
Honolulu, HI
Posts: 3,959
Liked 72 Times on 46 Posts


Easy - Beersmith.
__________________
Quote:
Originally Posted by duffman2 View Post
I dub this beer the Double Slutty Triple Nutty Bodacious Booty Brunette!

 
Reply With Quote
Old 03-25-2009, 04:07 PM   #6
Mike M
Recipes 
 
Jul 2007
, Delaware
Posts: 506
Liked 18 Times on 13 Posts


Some good information here: How to Brew - By John Palmer - Extract Efficiency and Typical Yield

 
Reply With Quote


Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
weight to determine SG? metaldwarf General Beer Discussion 19 11-20-2009 02:46 AM
Help to determine efficiency SSRider All Grain & Partial Mash Brewing 3 02-06-2009 06:45 AM
determine ABV when diluting jay415 General Techniques 5 07-16-2008 12:20 AM
How do you determine the AA%? mongrell Hops Growing 14 02-23-2008 05:05 AM
BeerSmith: how to determine mash efficiency for partial mashes Kaiser Equipment/Sanitation 3 12-26-2005 08:46 AM


Forum Jump