Very Low Efficiency - Page 2 - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Very Low Efficiency

Reply
 
Thread Tools
Old 07-07-2012, 08:59 PM   #11
duboman
Recipes 
 
Jul 2011
Glenview, IL
Posts: 6,368
Liked 508 Times on 470 Posts


Quote:
Originally Posted by sonex
your recipe was calculated for 5 gal. you had an extra 1/2 gallon not accounted for in the recipe so the beer was diluted by an extra 1/2 gal. of water not boiled off.
^^This^^, that half gallon plus the probability of an inadequate crush equals poor efficiency and lower than expected OG.

As you move to AG you will find all these details play into every beer batch you make. Any variations in the process, volumes, crush, etc will have the potential to make or break a beer
__________________
Nothing Left to do but smile and drink beer.....

The Commune Brewing Company-Perfecting the "art" of beer since 2010

 
Reply With Quote
Old 07-07-2012, 09:11 PM   #12
ajf
Senior Member
HBT_LIFETIMESUPPORTER.png
 
ajf's Avatar
Recipes 
 
Oct 2005
Long Island
Posts: 4,646
Liked 105 Times on 99 Posts


When you added the grain to the strike water did you stir really well to break up the dough balls? If not, that could explain the poor efficiency. I've never tried BIAB, but I also think that you would need a great deal of dunking (or even another stir of the grains in the bag to dissolve the sugars trapped in the grains.

-a.
__________________
There are only 10 types of people in this world. Those that understand binary, and those that don't.

 
Reply With Quote
Old 07-07-2012, 09:20 PM   #13
jb1677
Recipes 
 
Jan 2012
Columbia, MD
Posts: 155
Liked 2 Times on 2 Posts


Quote:
Originally Posted by ajf View Post
When you added the grain to the strike water did you stir really well to break up the dough balls? If not, that could explain the poor efficiency. I've never tried BIAB, but I also think that you would need a great deal of dunking (or even another stir of the grains in the bag to dissolve the sugars trapped in the grains.

-a.
I stired well, made sure there were no clumps at all - a nice slightly watery oatmeal consistency.

I dunked the bag numerous times, then stirred with it sumberged in the sparge water and let it sit for 10 minutes.

 
Reply With Quote
Old 07-07-2012, 11:42 PM   #14
chmarkham
Recipes 
 
Apr 2012
villas, new jersey
Posts: 16


Yesterday I attempted a partial mash for the first time, I ended up missing my OG by a mile (target 1.067, actual 1.053). My calculated efficiency was ~30%. My method was not traditional and I am sure was the cause but I dot get exactly why.

efficiency is measured pre boil gravity after the mash

 
Reply With Quote
Old 07-08-2012, 03:21 PM   #15
jb1677
Recipes 
 
Jan 2012
Columbia, MD
Posts: 155
Liked 2 Times on 2 Posts


After thinking about this a lot more than I probably should I came up with two other potential issues.

1. Testing my hydrometer with distilled water I came up with varying numbers. It became evident that dropping it in and waiting for it to settle could produce a consistent yet wrong reading. Dunking it with my finger and letting it bob back to a stable place too resulted in inacurate readings. I found that spinning it in the tube and allowing it to come to rest consistently produced a 1.000 reading. So its entirely possible my reading was wrong from teh start by a few points.

2. The Melanoiden, Carafoam and Caramel were all orderd crushed in 1lb increments. I only needed 1/2 lb of each so I split the lb by volume using a measuring cup - its entirely possible that I got more hulls and less seed. This would not account for the huge miss but could play a part.

I am thinking in the end there is no single answer, the two items above in conjunction with an elevated volume of wort probably all played into the "miss".

I am going to try brewing again real soon using grain crushed same day, and pre-measured before crushing along with very strict gravity and water measurements along the way along with adjusting my burner so that I end up boiling off exactly what I planned to do (its amazing how much I can vary boiloff by simply boiling more vigorously)

 
Reply With Quote
Old 07-08-2012, 04:30 PM   #16
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
 
Bobby_M's Avatar
Recipes 
 
Aug 2006
Whitehouse Station, NJ
Posts: 23,335
Liked 1765 Times on 1122 Posts


Quote:
Originally Posted by chmarkham View Post

efficiency is measured pre boil gravity after the mash
What gives you that impression? You can measure efficiency at three distinct portions of the process.. in the mash, in the kettle preboil and in the fermenter. They all tell you important things about the process if you're in troubleshooting mode.
__________________
Welcome to BrewHardware.com. I love you.
New Stirplates are IN!
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc.

Denny Likes This 
Reply With Quote
Old 07-08-2012, 09:11 PM   #17
chmarkham
Recipes 
 
Apr 2012
villas, new jersey
Posts: 16


Quote:
Originally Posted by Bobby_M View Post
What gives you that impression? You can measure efficiency at three distinct portions of the process.. in the mash, in the kettle preboil and in the fermenter. They all tell you important things about the process if you're in troubleshooting mode.
brewhouse efficiency is how much sugar you get out of the grain mash and pre boil gravity is the same thing. og and fg is different then brewhouse efficiency

 
Reply With Quote
Old 07-08-2012, 09:47 PM   #18
Gartywood
Recipes 
 
Jul 2011
Windsor, CT
Posts: 306
Liked 10 Times on 10 Posts


I thought that was mash efficiency and brew house efficiency was how much sugar got to the fermenter.

 
Reply With Quote
Old 07-08-2012, 11:32 PM   #19
Denny
HBT_LIFETIMESUPPORTER.png
Recipes 
 
Jun 2005
Eugene, OR
Posts: 4,872
Liked 682 Times on 490 Posts


Quote:
Originally Posted by Gartywood View Post
I thought that was mash efficiency and brew house efficiency was how much sugar got to the fermenter.
You are correct.
__________________
Life begins at 60....1.060, that is!

www.dennybrew.com

http://www.experimentalbrew.com - "Homebrew All Stars" now shipping!

 
Reply With Quote
Old 07-09-2012, 02:47 AM   #20
BrewKnurd
 
BrewKnurd's Avatar
Recipes 
 
Mar 2011
Prairieville, LA
Posts: 2,763
Liked 245 Times on 203 Posts


Quote:
Originally Posted by chmarkham

brewhouse efficiency is how much sugar you get out of the grain mash and pre boil gravity is the same thing. og and fg is different then brewhouse efficiency
Brewhouse efficiency is the percentage of potential sugar that makes it into the fermenter. Mash efficiency is the percentage of potential sugar that makes it into your kettle, which is what you seem to be referring to.
__________________
Fake it til you make it.

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
94% efficiency-Even possible? RCCOLA All Grain & Partial Mash Brewing 24 08-12-2015 05:26 PM
Do people report mash efficiency or brewhouse efficiency? thisoneguy All Grain & Partial Mash Brewing 66 07-25-2012 05:37 AM
Increassing efficiency or making up for low efficiency mcarb All Grain & Partial Mash Brewing 20 01-12-2011 04:29 PM
Somehow i'm doing way better with my efficiency oldschool All Grain & Partial Mash Brewing 4 03-22-2010 07:54 PM
Efficiency Lost Brews All Grain & Partial Mash Brewing 7 01-07-2008 09:35 PM


Forum Jump